Panasonic CD Stereo System Service Manual

© Panasonic Corporation 2009. All rights reserved.
Unauthorized copying and distribution is a violation
of law.
PSG0903007CE
CD Stereo System
Model No. SA-AK280EB
SA-AK280EG
SA-AK280EP
Product Color: (K)...Black Type
TABLE OF CONTENTS
PAGE PAGE
1 Safety Precautions----------------------------------------------- 3
1.1. GENERAL GUIDELINES-------------------------------- 3
1.2. Before Repair and Adjustment ------------------------- 3
1.3. Protection Circuitry---------------------------------------- 3
1.4. Safety Parts Information --------------------------------- 4
1.5. Caution for AC Cord (For EB only)-------------------- 5
2 Warning-------------------------------------------------------------- 6
2.1. Prevention of Electrostatic Discharge (ESD)
to Electrostatic Sensitive (ES) Devices---------------6
2.2. Precaution of Laser Diode -------------------------------7
2.3. Service caution based on Legal restrictions --------8
2.4. Handling Precautions for Traverse Unit --------------9
3 Service Navigation --------------------------------------------- 11
3.1. Service Information-------------------------------------- 11
Notes: This model’s CD mechanism unit is CR14C. Please refer to the original service manual
(Order No. MD0805031CE) for this mechanism

2
4 Specifications ---------------------------------------------------- 12
5 Location of Controls and Components------------------ 13
5.1. Main Unit Key Button Operation---------------------- 13
5.2. Remote Control Key Button Operation ------------- 14
6 Self-Diagnosis and Special Mode Setting -------------- 15
6.1. Doctor Mode Summary Table ------------------------- 15
6.2. Service Mode Summary Table------------------------ 15
6.3. Doctor Mode Table--------------------------------------- 16
6.4. Service Mode Table for CD Mechanism Unit
(CR14C) ---------------------------------------------------- 18
6.5. Reliability Test Mode (CD Mechanism Unit
CR14C) ----------------------------------------------------- 20
6.6. Error Code Table Display ------------------------------ 23
7 Troubleshooting Guide---------------------------------------- 26
7.1. Troubleshooting Guide for F61 and/or F76-------- 26
8 Service Fixture & Tools --------------------------------------- 31
8.1. Service Tools and Equipment ------------------------- 31
9 Disassembly and Assembly Instructions--------------- 32
9.1. Disassembly Flow Chart-------------------------------- 34
9.2. Main Components and P.C.B. Locations----------- 35
9.3. Disassembly of Top Cabinet--------------------------- 36
9.4. Disassembly of CD Mechanism Unit (CR14C) --- 36
9.5. Disassembly of Rear Panel---------------------------- 38
9.6. Disassembly of Front Panel Assembly ------------- 38
9.7. Disassembly of Panel P.C.B.-------------------------- 40
9.8. Disassembly of Dynamic Bass Knob &
Dynamic Bass Button Unit ----------------------------- 41
9.9. Disassembly of CD Lid---------------------------------- 42
9.10. Disassembly of Deck Mechanism unit -------------- 43
9.11. Disassembly of Deck P.C.B.--------------------------- 43
9.12. Disassembly of Deck Mechanism P.C.B.----------- 44
9.13. Disassembly of Deck Mechanism-------------------- 46
9.14. Disassembly of Cassette Lid -------------------------- 54
9.15. Disassembly of CD Servo P.C.B --------------------- 54
9.16. Rectification for Tape Jam Problem ----------------- 55
9.17. Disassembly of D-Amp P.C.B. ------------------------ 56
9.18. Replacement of Audio Digital Power Amp IC
(IC5000) ---------------------------------------------------- 57
9.19. Disassembly of Main P.C.B. --------------------------- 58
9.20. Disassembly of SMPS P.C.B. ------------------------- 59
9.21. Replacement of Switching Regulator IC
(IC5701) ---------------------------------------------------- 59
9.22. Replacement of Rectifier Diode (D5702)----------- 61
9.23. Replacement of Regulator Diode (D5801)--------- 62
9.26. Disassembly of AC Inlet P.C.B.----------------------- 64
9.27. Disassembly of USB P.C.B. --------------------------- 65
9.28. Disassembly of MPort/Headphone P.C.B. --------- 66
9.29. Assembling and Disassembling of Traverse
Unit Assembly--------------------------------------------- 66
10 Service Position ------------------------------------------------- 68
10.1. Checking and Repairing of Main P.C.B. ------------ 68
10.2. Checking and Repairing of Panel P.C.B., Deck
P.C.B., USB P.C.B. & MPort/Headphone
P.C.B.-------------------------------------------------------- 68
10.3. Checking and Repairing of D-Amp P.C.B. --------- 69
10.4. Checking and Repairing of SMPS and AC
Inlet P.C.B. ------------------------------------------------- 69
11 Procedure for Checking Operation of Individual
Parts of Deck Mechanism Unit ----------------------------- 70
11.1. Operation Check with Cassette Tape--------------- 70
11.2. Operation Check without Cassette Tape ---------- 70
12 Measurements and Adjustments-------------------------- 72
12.1. Cassette Deck Section --------------------------------- 72
13 Voltage & Waveform Chart ---------------------------------- 74
13.1. CD SERVO P.C.B --------------------------------------- 74
13.2. Main P.C.B (1/2)------------------------------------------ 75
13.3. Main P.C.B (2/2)------------------------------------------ 76
13.4. Panel P.C.B ----------------------------------------------- 77
13.5. Deck P.C.B ------------------------------------------------ 77
13.6. USB P.C.B------------------------------------------------- 78
13.7. D-Amp P.C.B---------------------------------------------- 78
13.8. SMPS P.C.B----------------------------------------------- 79
13.9. Deck Mechanism P.C.B -------------------------------- 79
13.10. Waveform Table (1/2)----------------------------------- 80
13.11. Waveform Table (2/2)----------------------------------- 81
14 Illustration of ICs, Transistor and Diode---------------- 82
15 Block Diagram--------------------------------------------------- 83
15.1. CD SERVO------------------------------------------------ 83
15.2. Main (1/2)-------------------------------------------------- 84
15.3. Main (2/2)-------------------------------------------------- 85
15.4. D-Amp ------------------------------------------------------ 86
15.5. Deck--------------------------------------------------------- 87
15.6. Power------------------------------------------------------- 88
16 Wiring Connection Diagram -------------------------------- 89
17 Schematic Diagram Notes----------------------------------- 91
18 Schematic Diagram -------------------------------------------- 93
18.1. CD SERVO Circuit -------------------------------------- 93
18.2. Main Circuit------------------------------------------------ 94
18.3. Panel Circuit ---------------------------------------------- 98
18.4. Deck Circuit ----------------------------------------------- 99
18.5. USB Circuit-----------------------------------------------100
18.6. D-Amp Circuit--------------------------------------------101
18.7. SMPS Circuit---------------------------------------------102
18.8. MPort/Headphone, Deck Mechanism, AC Inlet
Circuit------------------------------------------------------104
19 Printed Circuit Board-----------------------------------------105
19.1. CD SERVO, MPORT/HEADPHONE & Deck
P.C.B. -----------------------------------------------------105
19.2. Main P.C.B.-----------------------------------------------106
19.3. Panel P.C.B.----------------------------------------------107
19.4. Deck Mechanism, USB & AC Inlet P.C.B. --------108
19.5. D-Amp P.C.B.--------------------------------------------109
19.6. SMPS P.C.B.--------------------------------------------- 110
20 Terminal Function of ICs------------------------------------ 111
20.1. IC2801 (RFKWMAK280PN): IC
Microprocessor------------------------------------------ 111
20.2. IC6901(C0HBB0000057): IC FL Driver ----------- 111
21 Exploded View and Replacement Parts List---------- 113
21.1. Exploded View and Mechanical replacement
Part List --------------------------------------------------- 113
21.2. Electrical Replacement Part List-------------------- 119

3
1 Safety Precautions
1.1. GENERAL GUIDELINES
1. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or
damaged by the short circuit.
2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly
installed.
3. After servicing, carry out the following leakage current checks to prevent the customer from being exposed to shock hazards.
1.1.1. LEAKAGE CURRENT COLD CHECK
1. Unplug the AC cord and connect a jumper between the two prongs on the plug.
2. Measure the resistance value, with an ohmmeter, between the jumpered AC plug and each exposed metallic cabinet part on
the equipment such as screwheads, connectors, control shafts, etc. When the exposed metallic part has a return path to the
chassis, the reading should be between 1MΩ and 5.2MΩ.
When the exposed metal does not have a return path to the chassis, the reading must be
1.1.2. LEAKAGE CURRENT HOT CHECK
1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.
2. Connect a 1.5kΩ, 10 watts resistor, in parallel with a 0.15µF capacitors, between each exposed metallic part on the set and a
good earth ground such as a water pipe, as shown in Figure 1.
3. Use an AC voltmeter, with 1000 ohms/volt or more sensitivity, to measure the potential across the resistor.
4. Check each exposed metallic part, and measure the voltage at each point.
5. Reverse the AC plug in the AC outlet and repeat each of the above measurements.
6. The potential at any point should not exceed 0.75 volts RMS. A leakage current tester (Simpson Model 229 or equivalent)
may be used to make the hot checks, leakage current must not exceed 1/2 milliamp. In case a measurement is outside of the
limits specified, there is a possibility of a shock hazard, and the equipment should be repaired and rechecked before it is
returned to the customer.
Figure 1
1.2. Before Repair and Adjustment
Disconnect AC power to discharge unit AC Capacitors as such (C5700, C5701, C5703, C5704, C5705, C5706, C5707) through a
10 Ω, 10 W resistor to ground.
Caution:
DO NOT SHORT-CIRCUIT DIRECTLY (with a screwdriver blade, for instance), as this may destroy solid state devices.
After repairs are completed, restore power gradually using a variac, to avoid overcurrent.
Current consumption at AC 220V~240 V, 50 Hz in NO SIGNAL mode volume minimal should be ~ 500 mA.
1.3. Protection Circuitry
The protection circuitry may have operated if either of the following conditions are noticed:
• No sound is heard when the power is turned on.
• Sound stops during a performance.
The function of this circuitry is to prevent circuitry damage if, for example, the positive and negative speaker connection wires are
“shorted”, or if speaker systems with an impedance less than the indicated rated impedance of the amplifier are used.
If this occurs, follow the procedure outlines below:
1. Turn off the power.
2. Determine the cause of the problem and correct it.
3. Turn on the power once again after one minute.

4
Note:
When the protection circuitry functions, the unit will not operate unless the power is first turned off and then on again.
1.4. Safety Parts Information
Safety Parts List:
There are special components used in this equipment which are important for safety.
These parts are marked by in the Schematic Diagrams & Replacement Parts List. It is essential that these critical parts
should be replaced with manufacturer’s specified parts to prevent shock, fire or other hazards. Do not modify the original design
without permission of manufacturer.
Safety Ref. No. Part No. Part Name & Description Remarks
11 REXX0684-1 BLACK WIRE (AC-SMPS)
12 REXX0685-1 RED WIRE (AC-SMPS)
22 RGRX0070V-B1 REAR PANEL EG/EP
22 RGRX0070V-C1 REAR PANEL EB
42 RKMX0144A-K TOP CABINET
340 RAEX0190A-V TRAVERSE ASS'Y (RTL)
A2 K2CQ2CA00007 AC CORD EG/EP
A2 K2CZ3YY00005 AC CORD EB
A3 RQTX0199-E O/I BOOK (En/Po/Cz) EP
A3 RQTX0200-D O/I BOOK (Ge/It/Fr/Sp) EG
A3 RQTX0201-H O/I BOOK (Du/Da/Sw) EG
A3 RQTX0202-B O/I BOOK (En) EB
PCB1 REPX0714D SMPS P.C.B (RTL)
PCB10 REPX0714D AC INLET P.C.B (RTL)
DZ5701 ERZV10V511CS ZNR
L5701 ELF15N035AN LINE FILTER
L5703 ELF22V020A LINE FILTER
T2900 G4D1A0000117 SWITCHING TRANSFORMER
T5701 ETS42BN1A6AD SWITCHING TRANSFORMER
T5751 ETS19AB256AG SWITCHING TRANSFORMER
PC5701 B3PBA0000402 PHOTO COUPLER
F1 K5D502BNA005 FUSE
FP2901 K5G4013A0001 FUSE PROTECTOR
TH5001 D4CC11040013 THERMISTOR
TH5701 D4CAC8R00002 THERMISTOR
TH5860 D4CC11040013 THERMISTOR
P5701 K2AA2B000017 AC INLET
C5700 F1BAF1020020 1000pF
C5701 F0CAF334A087 0.33uF
C5703 F0C2H1040001 0.1uF 500V
C5704 F1BAF1020020 1000pF
C5705 F1BAF1020020 1000pF
C5706 F1BAF1020020 1000pF
C5707 F1BAF1020020 1000pF

5
1.5. Caution for AC Cord (For EB only)
For your safety, please read the following text carefully.
This appliance is supplied with a moulded three pin
mains plug for your safety and convenience.
A 5-ampere fuse is fitted in this plug.
Should the fuse need to be replaced please ensure that
the replacement fuse has a rating of 5-ampere and that it
is approved by ASTA or BSI to BS1362.
Check for the ASTA mark or the BSI mark on the
body of the fuse.
If the plug contains a removable fuse cover you must
ensure that it is refitted when the fuse is replaced.
If you lose the fuse cover the plug must not be used until
a replacement cover is obtained.
A replacement fuse cover can be purchased from your
local dealer.
If a new plug is to be fitted please observe the wiring
code as stated below.
If in any doubt please consult a qualified electrician.
IMPORTANT
The wires in this mains lead are coloured in accordance
with the following code:
Blue: Neutral, Brown: Live.
As these colours may not correspond with the coloured
markings identifying the terminals in your plug, proceed
as follows:
The wire which is coloured Blue must be connected to the terminal
which is marked with the letter N or coloured Black or Blue.
The wire which is coloured Brown must be connected to the
terminal which is marked with the letter L or coloured Brown or Red.
WARNING: DO NOT CONNECT EITHER WIRE TO THE
EARTH TERMINAL WHICH IS MARKED WITH THE
LETTER E, BY THE EARTH SYMBOL OR
COLOURED GREEN OR GREEN/YELLOW.
THIS PLUG IS NOT WATERPROOF KEEP DRY.
Before use
Remove the connector cover.
How to replace the fuse
The location of the fuse differ according to the type of AC
mains plug (figures A and B). Confirm the AC mains plug
fitted and follow the instructions below.
Illustrations may differ from actual AC mains plug.
1. Open the fuse cover with a screwdriver.
2. Replace the fuse and close or attach the fuse cover.
CAUTION!
IF THE FITTED MOULDED PLUG IS UNSUITABLE
FOR THE SOCKET OUTLET IN YOUR HOME THEN
THE FUSE SHOULD BE REMOVED AND THE PLUG
CUT OFF AND DISPOSED OF SAFELY.
THERE IS A DANGER OF SEVERE ELECTRICAL
SHOCK IF THE CUT OFF PLUG IS INSERTED INTO
ANY 13-AMPERE SOCKET.
Figure A Figure B
Fuse cover
Figure A Figure B
Fuse
(5 ampere)
Fuse
(5 ampere)
A A

6
2 Warning
2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatic Sensitive
(ES) Devices
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Elec-
trostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and
semiconductor "chip" components. The following techniques should be used to help reduce the incidence of component damage
caused by electrostatic discharge (ESD).
1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD on your
body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap,
which should be removed for potential shock reasons prior to applying power to the unit under test.
2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as alumi-
num foil, to prevent electrostatic charge buildup or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.
4. Use only an anti-static solder removal device. Some solder removal devices not classified as “anti-static (ESD protected)” can
generate electrical charge sufficient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most
replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or compara-
ble conductive material).
7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material
to the chassis or circuit assembly into which the device will be installed.
Caution:
Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the
brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD) suf-
ficient to damage an ES device).

7
2.2. Precaution of Laser Diode
Caution:
This product utilizes a laser diode with the unit turned “on”, invisible laser radiation is emitted from the pickup lens.
Wavelength: 785 nm (CD)
Maximum output radiation power from pickup: 100 µW/VDE
Laser radiation from the pickup unit is safety level, but be sure the followings:
1. Do not disassemble the pickup unit, since radiation from exposed laser diode is dangerous.
2. Do not adjust the variable resistor on the pickup unit. It was already adjusted.
3. Do not look at the focus lens using optical instruments.
4. Recommend not to look at pickup lens for a long time.

8
2.3. Service caution based on Legal restrictions
2.3.1. General description about Lead Free Solder (PbF)
The lead free solder has been used in the mounting process of all electrical components on the printed circuit boards used for this
equipment in considering the globally environmental conservation.
The normal solder is the alloy of tin (Sn) and lead (Pb). On the other hand, the lead free solder is the alloy mainly consists of tin
(Sn), silver (Ag) and Copper (Cu), and the melting point of the lead free solder is higher approx.30 degrees C (86°F) more than that
of the normal solder.
Definition of PCB Lead Free Solder being used
Service caution for repair work using Lead Free Solder (PbF)
• The lead free solder has to be used when repairing the equipment for which the lead free solder is used.
(Definition: The letter of “PbF” is printed on the PCB using the lead free solder.)
• To put lead free solder, it should be well molten and mixed with the original lead free solder.
• Remove the remaining lead free solder on the PCB cleanly for soldering of the new IC.
• Since the melting point of the lead free solder is higher than that of the normal lead solder, it takes the longer time to melt the
lead free solder.
• Use the soldering iron (more than 70W) equipped with the temperature control after setting the temperature at 350±30 degrees
C (662±86°F).
Recommended Lead Free Solder (Service Parts Route.)
• The following 3 types of lead free solder are available through the service parts route.
RFKZ03D01K-----------(0.3mm 100g Reel)
RFKZ06D01K-----------(0.6mm 100g Reel)
RFKZ10D01K-----------(1.0mm 100g Reel)
Note
* Ingredient: tin (Sn), 96.5%, silver (Ag) 3.0%, Copper (Cu) 0.5%, Cobalt (Co) / Germanium (Ge) 0.1 to 0.3%
The letter of “PbF” is printed either foil side or components side on the PCB using the lead free solder.
(See right figure)

9
2.4. Handling Precautions for Traverse Unit
The laser diode in the optical pickup unit may break down due to static electricity of clothes or human body. Special care must be
taken avoid caution to electrostatic breakdown when servicing and handling the laser diode in the traverse unit.
2.4.1. Cautions to Be Taken in Handling the Optical Pickup Unit
The laser diode in the optical pickup unit may be damaged due to electrostatic discharge generating from clothes or human body.
Special care must be taken avoid caution to electrostatic discharge damage when servicing the laser diode.
1. Do not give a considerable shock to the optical pickup unit as it has an extremely high-precise structure.
2. To prevent the laser diode from the electrostatic discharge damage, the flexible cable of the optical pickup unit removed
should be short-circuited with a short pin or a clip.
3. The flexible cable may be cut off if an excessive force is applied to it. Use caution when handling the flexible cable.
4. The antistatic FPC is connected to the new optical pickup unit. After replacing the optical pickup unit and connecting the flexi-
ble cable, cut off the antistatic FPC.
Figure 1
2.4.2. Grounding for electrostatic breakdown prevention
Some devices such as the DVD player use the optical pickup (laser diode) and the optical pickup will be damaged by static electric-
ity in the working environment. Proceed servicing works under the working environment where grounding works is completed.
2.4.2.1. Worktable grounding
1. Put a conductive material (sheet) or iron sheet on the area where the optical pickup is placed, and ground the sheet.

10
2.4.2.2. Human body grounding
1. Use the anti-static wrist strap to discharge the static electricity form your body.
Figure 2

11
3 Service Navigation
3.1. Service Information
This service manual contains technical information which will allow service personnel’s to understand and service this model.
Please place orders using the parts list and not the drawing reference numbers.
If the circuit is changed or modified, this information will be followed by supplement service manual to be filed with original service
manual.
• CD Mechanism unit (CR14C):
1) This model uses CD mechanism unit (CR14C).
2) This service manual does not contain the following information on CR14C
- Schematic Diagram, Block Diagram and P.C.B. layout of CR14C P.C.B.
- Parts List for individual parts of CD mechanism unit (CR14C).
- Exploded View and Part List for individual parts of CD mechanism unit (CR14C).
Please refer to original service manual (Order No. MD0805031CE)
• Micro-processor & EEPROM IC:
1) The following components are supplied as an assembled part.
- Micro-processor IC, IC2801 (RFKWMAK280PN).
- EEPROM IC, IC2951 (RFKWEAK280PN).
• Speaker system:
1) The information, please refer to Original Service Manual, SB-AK280PN-K (Order No. PSG0902012CE).

12
4 Specifications
Main unit SA-AK280EB/EG/EP-K
AMPLIFIER SECTION
RMS Output Power Stereo Mode
Front CH (both channels driven):
125 W per channel (3 Ω), 1 kHz, 10% THD
Total RMS stereo mode power:
250 W
FM/AM TUNER, TERMINALS SECTION
Preset station: FM 30 stations
AM 15 stations
Frequency Modulation (FM)
Frequency range:
87.5-108.0 MHz (100 kHz step)
Antenna terminals: 75 Ω (unbalanced)
Amplitude Modulation (AM)
Frequency range:
522 to 1629 kHz (9 kHz step)
520 to 1630 kHz (10 kHz step)
AUX Input:
RCA pin jack
Music Port (Front Jack):
Sensitivity 100 mV, 4.7 kΩ
Terminal: Stereo, 3.5 mm jack
Headphone jack
Terminal: Stereo, 3.5 mm jack
CASSETTE DECK SECTION
Track system: 4 track, 2 channel
Head:
Record/playback Solid permalloy head
Erasure Double gap ferrite head
Motor DC servo motor
Recording system AC bias 100 kHz
Erase system AC erase 100 kHz
Tape speed 4.8 cm/s
Overall frequency response (+3, -6 dB) at DECK OUT
NORMAL 35 Hz to 14 kHz
S/N Ratio 50 dB (A weighted)
Wow and flutter 0.18% (WRMS)
Fasr forward and rewind time
Approx. 120 second with C-60
cassette tape
DISC SECTION
Discs played [8 cm or 12 cm]:
(1) CD-Audio (CD-DA)
(2) CD-R/RW (CD-DA, MP3* formatted disc)
(3) MP3*
* MPEG-1 layer 3, MPEG-2 Layer 3
Pick up
Wavelength: 785 nm
Audio output (Disc)
Number of channels 2 (FL, FR)
USB SECTION
USB Port
USB standard: USB 2.0 full speed
Media file format support: MP3 (*.mp3)
USB device file system: FAT12, FAT16, FAT32
USB Port power: Max. 500 mA
GENERAL
Power Supply AC 220 to 240 V, 50 Hz
Power Consumption 65 W
Dimensions (WxHxD) 250 x 333 x 310 mm
Mass 4.5 kg
Operating temperature range 0 to 40 °C
Operating humidity range 35 to 80% RH
(no condensation)
Power Consumption in standby
mode:
0.4 W (approx.)
SYSTEM
SC-AK280EB-K Music center: SA-AK280EB-K
Speaker: SB-AK280PN-K
SC-AK280EG-K Music center: SA-AK280EG-K
SC-AK280EP-K Music center: SA-AK280EP-K
Note:
1. Specifications are subject to change without notice.
Mass and dimensions are approximate.
2. Total harmonic distortion is measured by the digital spectrum
analyzer.
Solder:
This model uses lead free solder (PbF).

13
5 Location of Controls and Components
5.1. Main Unit Key Button Operation
Reduce the volumelevel and connect the headphones.
Headphones plug type: 3.5 mm stereo (not included).
Avoid listening for prolonged periods of time to
prevent hearing damage.
Excessive sound pressure from earphones and
headphones can cause hearing loss.
Headphone jack
Press to switch the unit from on to standby mode or vice versa.
In standby mode, the unit is still consuming a small amount of
power.
Tape recording function
USB play or pause
Cassette deck open
Standby/on switch ( /l, POWER)
[ REC, TAPE]
[
Skip, rewind, fast forward,Tape Program Sensor (TPS),
sound quality adjustment, time adjustment
[]/[
USB port
Tape play
[MUSIC P./AUX]
[MANUAL EQ] selection
[
[
USB,
[ , OPEN]
[ , OPEN/CLOSE]
Disc tray open or close
[ , EXCHANGE]
Multiple discs change
Disc play and pause
Disc direct play
Tuner (FM/AM) Selection
Increase or decrease the pitch
[BASS CONTROL]
This feature reproduce the frequencies lost during
recording to give you a sound closer to original.
[RE-MASTER]
Skip and play your desired track
[Track]
[
[
CD,
Stop playback, demonstration function
Cassette holder
Display Panel
Disc Ttrays
Remote control signal sensor
Volume control
Music port jack

14
5.2. Remote Control Key Button Operation
Press to switch the unit from on to
standby mode or vice versa.
In standby mode, the unit is still
consuming a small amount of
power.
Standby/on switch ( /l, POWER)
USB play or pause
Select and play the
other loaded discs.
Numberic selection
Delete function
Program function
AUX selection
Skip, rewind, fast forward,
Tape Program Sensor (TPS),
sound quality adjustment,
time adjustment
RE-MASTER selection
Manual EQ selection
D.BASS selection
Album selection
Display function
Music Port selection
Tape play
Disc play and pause
Tape recording function
Clock or timer setting
Play timer or record timer setting
Sleep timer
Auto off
Muting function
Stop playback, demonstration function
Play mode function
Preset EQ selection
Repeat function
Dimmer function
Tune mode
Tuner (FM/AM) Selection

15
6 Self-Diagnosis and Special Mode Setting
This unit is equipped with features od self-diagnosis & special mode setting for checking the function & reliability.
Special Note: Checking of the reliability (ageing) & changer operation must be carry out to ensure good working condition in unit.
6.1. Doctor Mode Summary Table
6.2. Service Mode Summary Table
6.2.1. Service Mode Summary Table for CD Mechanism Unit (CR14C)
Main unit buttons Remote control unit buttons Application Note
[ ] [4], [7] Enter into doctor mode. (Refer to the section “6.3.1. Doctor Mode
Table 1” for more information.)
Doctor Mode Main unit [ ]
or
[IDDF] (special Remocon)
Display firmware version and EEPROM check-
sum
(Refer to the section “6.3.2. Doctor Mode
Table 2” for more information.)
[4] Cold Start when reset start is executed the
time
[OK] Exit inspection mode
[MUTE] Clock Setting Check
[0] Tape Eject check
[2] FL DIsplay check
[DISC] CR14 Inspection
[3] Operation keys & all segment display check
mode
[7] Volume Setting Check 50
[>10] Volume Setting Check 0
[PRESET EQ] EQ Off
[D.Bass] EQ Heavy
[PLAYMODE] WOW flutter check
[5] CD To Tape recording Inspection
[6] Tape record’s playback
[SLEEP] TPS Inspection
[<] FM Tuning check
[>] Tuner STEREO/ forced MONO
[ ] FM OK/ NG (98.1 MHz)
[ ] AM OK/ NG (1000 KHz)
[DISPLAY] RDS checking
[1] MP3 DISC check
[DEL] USB MP3 check
Main buttons Remote control unit buttons Application Note
[STOP] + [ /FF/ ] - Entering into self-diagnostic mode. (Refer to the section
“6.4.1. Service Mode
Table 1” for more informa-
tion.)
[1] (In self-diagnostic
mode)
- Servicing the mechanism unit.
[2] (In self-diagnostic
mode)
- Servicing the traverse unit.
In Self Diagnostic Mode [1] Reliability 1 (Load) (Refer to the section
“6.4.2. Service Mode
Table 2” for more informa-
tion.)
[2] Reliability 2 (Cycle)
[3] Reliability 3 (Combi)

16
6.3. Doctor Mode Table
6.3.1. Doctor Mode Table 1
FL Display
Key Operation
Front Key
Item
DescriptionMode Name
Doctor Mode
1. The check Sum of EPPROM and firmware
version will be display.
* ROM correction.
* Firmware Version No:
If there is no EEPROM Correction.
checksum: (Condition 1):
Opecon
Version
No Correction
Point Data
EEPROM Checksum
(if applicable)
Firmware
Version (DEC)
(Display 1)
If the EEPROM version matches, checksum
[YYYY] is displayed.
If the version of the EEPROM does not
match or not working properly [NG] is
displayed
Checksum
value (HEX)
applicable
when the
EEPROM IC
is installed
Firmware
Version (DEC)
Firmware
different from
setFirmware
Version (DEC)
To enter into Doctor Mode for checking
of variuos items and displaying
EEPROM and firmware version.
Note: The micro-processor version
as shown is an example. It will be
revise when there is an update.
FL Display sequence:
Display 1 2.
In CD Mode:
1. Press [ ] button
on main unit follow by [4]
and [7] on remote control.
-DEMO
To exist, press [ok] button on
remote control or press
[ /I, POWER] button on main
unit or remote control.

17
6.3.2. Doctor Mode Table 2
FL Display
Key Operation
Front Key
Item
Cold Start
Clock Setting
Check
Volume Setting
Check
FL Display
Check
Operation keys
& all segment
display check
mode
To active cold start upon next AC
power up when reset start is execute
the next time.
To indicate that a clock time was set
properly.
To check the volume setting of a main
unit.
To check the FL segment display
(All segment will light up).
Tape Eject
Check
CR14
Inspection
To check the on Tape eject function
(For deck 1/2)
To check the function operation of
mechanism unit
Press [7]: VOLUME50
Press [8]: VOLUME35
Press [9]: VOLUME27
Press [>10]: VOLUME0
In Doctor mode:
1. Press [4] button on
remote control.
In Doctor mode:
1. Press [MUTE] button on
remote control.
In Doctor mode:
remote control.
In Doctor mode:
1. Press [7],[8],[9],[>10]
button on remote control.
remote control.
In Doctor mode:
remote control.
In Doctor mode:
remote control.
In Doctor mode:
1. Press [DISC] button on
remote control.
Volume
FL Display and all LED shall be all OFF.
When the keys of the main set are
pressed,the various corresponding grids
and segments of the FL display shall light
up in any sequence.When all the keys are
pressed and detected, all segment
and LED will ON.
To exist, press any key

18
6.4. Service Mode Table for CD Mechanism Unit (CR14C)
6.4.1. Service Mode Table 1
In self-diagnostic mode, press [1]
button on main unit.
To exit, power off the main unit
Press [EXCHANGE] on main unit
for error code.
FL Display
Key Operation
Front Key
Item
In DVD/CD mode (ensure no disc is
inserted):
Press and hold [STOP] button for five
seconds, followed by [ /FF/ ]
button on the main unit.
To exit, press [ , AC IN] button on
main unit or remote control unit.
To enter into self-diagnostic checking
for CR14 mechanism.
Self-Diagnostic
Mode
To unlock the mechanism unit for
service.
In this mode, the disassembly of CR14
can be carry out. (Refer to original
service manual for CR14)
1. All trays are set to "STOCK" position.
2. Mechanism set to tray 1.
3. Cam gear set to "HOME" position.
Service Mode 1
button on main unit.
To exit, power off the main unit
Press [EXCHANGE] on main unit
for error code.
To unlock the traverse unit for service.
In this mode, traverse unit can be
disassembled. (Refer to original
service manual for CR14)
1. Tray 5 set to "Play" position.
2. Mechanism set to tray 5.
3. Cam gear set to "HOME" position.
Service Mode 2
/l
(Refer to section 8.6.1. for information)

19
6.4.2. Service Mode Table 2
FL Display
Key Operation
Front Key
Item
The counter will
increment by one.
When reach 99999
will change to 00000
In this mode, the trays are loaded &
unloaded.
To exit, press [ ] button on the
Reliability
1
(Load cycle Test)
To determine open/close operation of the
mechanism (all trays).
Reliability
2
(Traverse Cycle
Test)
To determine playability operation.
Reliability
3
(Combi Cycle
Test)
The combine test for both load &
traverse cycle test.
/l
/l
/l
Display 1
Display 2
The counter will
increment by one.
When reach 99999
Display 1
Display 2
The counter will
increment by one.
When reach 99999
Display 1
Display 2

20
6.5. Reliability Test Mode (CD Mechanism Unit CR14C)
Below is the progress flow chart of ageing for the Mechanism unit (CR14C).
Fig. 1
Fig. 2

23
6.6. Error Code Table Display
Self-Diagnosis Function (refer Section “6.” Service Mode Table 1”) provides information on any problems occurring for the unit and
its respective components by displaying the error codes. These error code such as U**, H** and F** are stored in memory and held
unless it is cleared.
The error code is automatically display after entering into self-diagnostic mode.
6.6.1. Deck Mechanism Error Code Table
Error Code Diagnosis Contents Description of error Automatic FL Display Remarks
H01 Mode SW, plunger
and capstan motor
abnormal
Normal operation during
mecha transition, MODE
SW abnormal is
memorized. The content of
abnormality can be
confirmed in the abnormal
detection mode explained
in the later section.
For deck mechanism unit.
Press [ ] on main unit for
next error.
H02 Rec INH SW
abnormal
The content of abnormality
can be confirmed in the
abnormal detection mode
explained in the later
section.
For deck mechanism unit.
next error.
H03 HALF SW abnormal For deck mechanism unit.
next error.
F01 Reel pulse abnormal For deck mechanism unit.
next error.
F02 TPS abnormal For deck mechanism unit.
next error.
-DEMO
-DEMO
-DEMO
-DEMO
-DEMO

24
6.6.2. CD Mechanism Unit (CR14C) Error Code Table
6.6.3. Error Code Table (For Power Supply)
LOAD Load operation faulty The load operation cannot
complete when time out -->
Falsaf reverse operates
again then time out again, it
is memorized.
For CD Mechanism unit (CR14C).
Press [EXCHANGE] on main unit for
next error.
UNLD Unload operation
faulty
The unload operation
cannot complete when time
out --> Falsaf reverse
operates again then time
out again, it is memorized.
next error.
UP Exchange open
operation faulty
The exchange open
operation cannot complete
when time out --> operation
time out again, it is
memorized.
next error.
DOWN Down operation faulty The down operation cannot
is memorized.
next error.
OPEN Open operation faulty The open operation cannot
is memorized.
next error.
CLOSE Close operation faulty The open operation cannot
is memorized.
next error.
MODEL Mode change to
updown operation
faulty
The mode change to
updown operation cannot
complete when time out
reversing --> operates
is memorized. Mode
change to updown.
next error.
MODEH Mode change to
horizontal operation
faulty
The mode change to
horizontal operation cannot
complete when time out
reversing --> operates
is memorized. Mode
change to horizontal.
next error.
INITIALIZE Initialize operation
faulty
The initialize operation
cannot complete, it is
memorized.
next error.
F61 Power Amp IC output
abnormal
Upon power on,
PCNT=HIGH, DCDET2=L
after checking LSI.
For power.
next error.
F76 DCDET1 = L (NG)
F61-76 Both DCDET1 and
DCDET2 L (NG)
-DEMO

25
6.6.4. USB Error Code Table
- Overcurrent detection USB Device driver function
was interrupted.USB not
properly connected.
DEVICE_ERROR Display will maintain until system is
RESET either by Power OFF ON
or by changing selector to other than
USB mode and back to USB.

26
7 Troubleshooting Guide
7.1. Troubleshooting Guide for F61 and/or F76
This section illustrates the checking procedures when upon detecting the error of “F61” and/or “F76” after power up of the unit. It is
for purpose of troubleshooting and checking in SMPS, D-Amp & Main P.C.B.
7.1.1. Block Diagram
Speaker Out
DC Detect
SUBWOOFER
CENTER
FRONT - R
FRONT - L
SURROUND - R
SURROUND - L
30V Detect ( 30V_SENSE )
SYS6V
FAN Detect
D-AMP P.C.B.
SMPS P.C.B.
MICRO-P
DCDET 2
DCDET2
(F61)
SYS6V
T
+ 18V Fan Detect
emperature Detect
DCDET 2

27
7.1.2. Troubleshooting Guide
Symptom Checking Items Repair Items Remarks
FL display blinking with
abnormal segment when
power ON the set or "F61"
Check the soldering of the SMPS
P.C.B.
· Is there any solder crack at area
(Q5860,Q5861, Q5862,TH5860,
QR5801)
· Check all the supply line 30V
· Is there any solderability at area
of feedback circuit
· Check feedback circuit (IC5801,
Q5802, D5806, PC5720, D5725)
Touch-up the solder crack area/
Change the defective parts.
· Q5860,Q5861,Q5862,TH5860
(Temperature Detect)
· QR5801 & QR5802 ( 30V
Detect)
· Touch-up the necessary areas
· IC5801, D5806, PC5720,
D5725
SMPS
P.C.B.
Refer to
Fig. 1
First Power ON Display
immediate show "F61".
Check Speaker output by using
multi-meter,
· If there is a DC Voltage around
30V
· Check Output IC (Pin 10 &
14) which have DC Voltage at
Speaker output short to
Vdd/Vss
· If shorted that means D-Amp
damage already.
D-AMP IC:
IC5000
P/N = C1BA00000487
For Configuration
Refer to Table 1
D-AMP
P.C.B.
Refer to
Fig. 2
Power ON for a while then
only trigger "F61".
(Symptom always happen)
Check the soldering of the SMPS
P.C.B.
· Is there any solder crack at area
(Q5860,Q5861, Q5862,TH5860,
QR5801)
· Check all the supply line 30V
Touch-up the solder crack area/
· Q5860,Q5861,Q5862,TH5860
(Temperature Detect)
· QR5801 & QR5802 ( 30V
Detect)
Feedback Circuit: IC5801,
PC5720, D5725
SMPS
P.C.B.
Refer to
Fig. 1
Power ON for a while and
then trigger "F76"
Check all supply voltages as
follows:
Step 1: Check for supply voltages
from SMPS P.C.B to Main P.C.B
at pin 2,5,6,7,8,9 of CN5802.
If there are supply voltages,
proceed to Step 2.
If no voltages detected, check wire
connection and circuitry connection
from SMPS P.C.B.
Step 2: Check if there is supply
voltages for Vp, FL1 & FL2
CN2806
· If tere is supply voltages of
-13V, +7.5V (CR14), +12V
(Motor), +6V (SYS6V), +9V
& +18V at CN5802
· If there is supply voltages of
9V at CN6001
Check and change the possible
defective parts.
· FP2901 (Fuse Protector),
T2900, D2901, D2906, D2908,
D2909
· IC2701 (Switching Regulator IC)
& related regulator circuit
components
· IC2731 (Regulator IC)
& related regulator circuit
components
Refer to
Fig. 3
Main
P.C.B.

28
7.1.3. Part Location
7.1.3.1. SMPS P.C.B.
Fig. 1 SMPS P.C.B.
Feedback circuit:
PC5720, D5725
SMPS P.C.B.
-30V Detect:
QR5801, QR5802,
Feedback Circuit:
IC5801, Q5802, D5806
Temperature Detect:
Q5860, Q5681, Q5862
Temperature Detect:
TH5860

29
7.1.3.2. D-Amp P.C.B.
Fig. 2 D-Amp P.C.B.
Audio Digital Power
Amp IC: IC5000
Muting Circuit
Q5601, Q5604
D-Amp P.C.B.
SPEAKER
OUTPUT

30
7.1.3.3. Main P.C.B.
Fig. 3 Main P.C.B.
Fuse Protector:
FP2901
T2900, D2901,
D2906, D2908
& D2909
Connector:
CN2806
Switching Regulator IC:
IC2701
Main P.C.B.
+12V Regulator IC:
IC2731

31
8 Service Fixture & Tools
8.1. Service Tools and Equipment
Prepare service tools before process service position.
Service Tools Remarks
Main P.C.B. (CN2341A) - D-Amp P.C.B. (CN5050) REEX0930 (17P FFC) (RTL)
Main P.C.B. (CN2700) - SMPS P.C.B. (CN5802) REXX0680 (11P wire) (RTL)
SMPS P.C.B. (H5801) - D-Amp P.C.B. (CN5500) REXX0683 (8P wire) (RTL)

32
9 Disassembly and Assembly Instructions
“ATTENTION SERVICER”
Be careful when disassembling and servicing.
Some chassis components may have sharp edges.
Special Note:
1. This section describes the disassembly procedures for all the major printed circuit boards and main components.
2. Before the disassembly process was carried out, do take special note that all safety precautions are to be carried
out.
(Ensure that no AC power supply is connected during disassembling.)
3. For assembly after operation checks or replacement, reverse the respective procedures.
Special reassembly procedures are described only when required.
4. Do take note of the locators on each printed circuit board during reassembling procedures.
5. The Switch Regulator IC may have high temperature after prolonged use.
6. Use caution when removing the top cabinet and avoid touching heat sinks located in the unit.
7. Select items from the following index when checks or replacement are required.
• Disassembly of Top Cabinet
• Disassembly of Rear Panel
• Disassembly of CD Mechanism Unit (CR14C)
• Disassembly of Rear Panel
• Disassembly of Front Panel Assembly
• Disassembly of Panel P.C.B.
• Disassembly of D-Bass Knob D-Bass Button Unit
• Disassembly of CD Lid
• Disassembly of Deck Mechanism Unit
• Disassembly of Deck P.C.B.
• Disassembly of Deck Mechanism P.C.B.
• Disassembly of Deck Mechanism
• Disassembly of Cassette Lid
• Rectification for Tape Jam Problem
• Disassembly of D-Amp P.C.B.
• Replacement of Audio Digital Power Amp IC (IC5000)
• Disassembly of Main P.C.B.
• Disassembly of SMPS P.C.B.
• Replacement of Switching Regulator IC (IC5701)
• Replacement of Rectifier Diode (D5702)
• Replacement of Regulator Diode (D5801)
• Disassembly of AC Inlet P.C.B.
• Disassembly of USB P.C.B.
• Disassembly of MPort/Headphone P.C.B.
• Assembling and Disassembling of Traverse Unit Assembly

34
9.1. Disassembly Flow Chart
9.3. Top Cabinet
9.26. AC Inlet P.C.B.
9.6. Front Panel
Assembly
9.10. Deck Mechanism
Unit
9.9.CD Lid
9.7. Panel P.C.B.
9.8. Dynamic Bass Knob &
Dynamic Bass Button Unit
9.4. CD Mechanism Unit
(CR14C)
9.5. Rear Panel 9.30.Traverse Unit
9.16.Rectification for
Tape Jam Problem
9.17.D-Amp P.C.B.
9.19. Main P.C.B.
9.20. SMPS P.C.B.
9.21.Switching Regulator
IC (IC5701)
9.22. Rectifier Diode
(D5702)
9.23. Regulator Diode
(D5801)
(D5802)
9.11. Deck P.C.B.
P.C.B.
9.15. CD Servo P.C.B.
9.27. USB P.C.B.
9.28. MPort/Headphone
P.C.B.
(D5803)
9.18. Audio Digital Power
Amp IC (IC5000)
9.14. Cassette Lid

35
9.2. Main Components and P.C.B. Locations

36
9.3. Disassembly of Top Cabinet
Step 1 Remove 3 screws on each side of main unit.
Step 2 Remove 5 screws.
Step 3 Lift the sides of top cabinet outwards as arrow shown.
Step 4 Push the top cabinet backwards as arrow shown to
release the catches.
Step 5 Remove the top cabinet.
9.4. Disassembly of CD Mecha-
nism Unit (CR14C)
• Follow (Step 1) to (Step 5) of Item 9.3

37
Step 1 Remove 1 screw at the rear panel.
Step 2 Detach 22P FFC at the connector (CN2801) on Main
P.C.B.
P.C.B.
Step 4 Release the claw outwards on both sides.
Step 5 Release CD mechanism unit (CR14C) from the catches
& locators.
Step 6 Lift up the CD Mechanism Unit (CR14C) in the direction
of arrow to remove CD Mechanism Unit (CR14C).
• Disassembly of Mecha Chassis

38
Step 8 Remove the Mecha Chassis as arrow shown.
9.5. Disassembly of Rear Panel
• Follow the (Step 1) to (Step 5) of Item 9.3
Step 1 Remove 9 screws at Rear Panel.
Step 2 Release 2 catches from the each side of the Rear
Panel.
Step 3 Slightly lift up the CD Mechanism Unit (CR14C) to
release from the two locators.
Step 4 Remove Rear Panel in the direction of arrow.
9.6. Disassembly of Front Panel
Assembly

39
P.C.B.
P.C.B.
P.C.B.
P.C.B.
P.C.B.
P.C.B.
Step 7 Release the claws on both sides.
Step 8 Release catches at both side.
Caution: During assembling procedure, ensure both the
claws and catches are fully catched.
Step 9 Release the tabs at the bottom.

40
Caution: Do not exert strong force when releasing the tabs.
Step 10 Remove the Front Panel Assembly in the direction of
arrow.
9.7. Disassembly of Panel P.C.B.
Step 1 Remove Volume Knob as arrow shown.
Step 2 Remove Track Knob as arrow shown.
Step 3 Remove 8 screws on Panel P.C.B.
Step 4 Remove 1 screw on Support P.C.B.
Step 5 Release 6 catches on Panel P.C.B.
Step 6 Remove Panel P.C.B.

41
Caution: During assembling of Dynamic Bass P.C.B.,
ensure that the diodes on Panel P.C.B. are in upright posi-
tion.
9.8. Disassembly of Dynamic Bass
Knob & Dynamic Bass Button
Unit
9.8.1. Disassembly of Dynamic Bass
Knob
Step 1 Release 4 catches on solder side of Panel P.C.B.
Step 2 Remove the Dynamic Bass Knob Assembly.
Step 3 Release 3 catches at the Dynamic Bass Knob.
Step 4 Remove the Dynamic Bass Knob.

42
Caution 1: Do not misplace the Volume Gear.
Caution 2: Volume gear to align to Volume Knob & engage
to Dynamic Bass Knob during assembly.
9.8.2. Disassembly of Dynamic Bass But-
ton Unit
Step 1 Release 4 catches at Dynamic Bass Button Assembly.
Step 2 Release 2 catches at Dynamic Bass Button Unit.
Step 3 Remove Dynamic Bass Button Unit.
9.9. Disassembly of CD Lid
Step 1 Remove the spring as arrow shown in order of
sequences (1) to (3).

43
Caution: During assembling, please ensure that the spring
is assembly at right position.
Step 2 Remove CD Lid as arrow shown.
9.10. Disassembly of Deck Mecha-
nism unit
Step 1 Remove 4 screws at Deck Mechanism unit.
Step 2 Push the level upward as arrow shown to open the
casette lid.
Step 3 Remove the Deck Mechanism unit as arrow shown.
9.11. Disassembly of Deck P.C.B.

44
Step 2 Remove the shield plate as arrow shown.
Step 3 Desolder 2P wire at the Capstan Motor Ass’y.
Step 4 Detach the Head Connector Cable at the connector
(CP1301) to remove the Deck P.C.B. as arrow shown.
nism P.C.B.

45
Step 1 Desolder the plunger terminals.
Step 2 Remove 1 screw.
Step 3 Release 4 catches.
Step 4 Remove Deck Mechanism P.C.B.

46
Caution : During assembling, ensure that the Deck Mecha-
nism P.C.B. is seated properly with the guide of the loca-
tors.
nism
9.13.1. Disassembly of Pinch Roller ‘F’
Ass’y and Head Block Sub Ass’y
Step 1 Release catch to remove Pinch Roller ‘F’ Ass’y as arrow
shown.

47
Step 2 Release 2 catches at the sides of the Head Connector
as arrows shown.
Step 3 Remove the Head Connector as arrow shown..
Caution: Avoid exerting strong force as it may damage the
FPC.

48
Step 6 Remove Head Block Sub Ass’y as arrow shown.
Caution: During assembling, ensure that the FPC is placed
into the slot of the Head Block Sub Ass’y.
9.13.2. Replacement of Capstan Motor
Ass’y and Capstan Belt ‘A’
• Follow the (Step 1) to (Step 4) of item 9.11.
• Follow the (Step 2) to (Step 3) of item 9.13.1.
- Disassembly of Capstan Motor Ass’y and Capstan Belt ‘A’

49
Step 2 Lift up to remove the Sub-Chassis Ass’y as arrow
shown.
Step 3 Remove 2 screws to remove Capstan Motor Ass’y.
Caution: Support Capstan Motor Ass’y by hand to prevent
it from falling during removal and assembly of Capstan
Motor Ass’y.
Step 4 Remove Capstan Belt ‘A’.
- Assembly of Capstan Motor Ass’y and Capstan Belt ‘A’
Step 1 Coil Capstan Belt ‘A’ to Flywheel ‘F’ Ass’y and the 2

50
bosses temporarily as diagram shown.
Caution: Keep Capstan Belt ‘A’ away from grease during
assembly of Capstan Belt ‘A’.
Step 2 Fix the Capstan Motor Ass’y to the Sub-Chassis Ass’y.
Step 3 Fit the Capstan Motor Ass’y to the Sub-Chassis Ass’y
by fixing 2 screws.
Step 4 Install the Sub-Chassis Ass’y to the Deck Mechanism
Unit.
Caution: Ensure the Sub-Chassis Ass’y seats properly on
the bosses.
Step 5 Fix 3 screws.
Step 6 Release Capstan Belt ‘A’ to the pulley of Capstan Motor
Ass’y as diagram shown.
9.13.3. Replacement of Winding Belt
- Disassembly of Winding Belt
Step 1 Release 2 catches and press the tip of the Winding
Lever downwards.

51
Caution: Avoid pushing too much. This is to prevent the
parts from falling out from the Deck Mechanism (Gear
side).
Step 2 Remove the Winding Lever.
Step 3 Remove the Thrust Spring.
Step 4 Remove the Winding Arm Ass’y.
Step 5 Remove the Flywheel ‘F’ Ass’y.
Step 6 Remove the Winding Belt.
Caution: Keep Thrust Spring in a safe place for assembling
purpose.
- Assembly of Winding Belt
Step 1 Install the Winding Arm Ass’y.
Step 2 Coil the Winding Belt to the Winding Arm Ass’y and the
2 bosses temporarily as diagram shown.

52
Step 3 Install Flywheel ‘F’ Ass’y.
Caution: Ensure that the boss and the marking hole of the
Main Gear are positioned such that they form a horizontal
line parallel to the Deck Mechanism Unit.
Step 4 Install the Thrust Spring.
Step 5 Install the Winding Lever.
Caution 1: Ensure that the Winding Arm Ass’y is pulled
towards to the right as arrow shown to enable full insertion
of the Winding Lever. The Winding Lever must be seated
on the Main Gear as diagram shown.

53
Caution 2: Ensure that the Winding Lever is firmly inserted
and properly catched on the tape side as diagram shown.
Caution 3: Ensure that the Winding Belt is above the Wind-
ing Lever as diagram shown.
Step 6 Release the Winding Belt on Flywheel ‘F’ Ass’y as dia-
gram shown.
9.13.4. Disassembly of Main Gear

54
Step 1 Remove Main Gear using tweezers.
Caution: Ensure that the boss and the marking hole of the
Main Gear are positioned such that they form a horizontal
line parallel to the Deck Mechanism during assembly of the
Main Gear.
9.14. Disassembly of Cassette Lid
Step 1 Remove the spring.
Step 2 Push the Cassette Lid in the direction of arrow.
9.15. Disassembly of CD Servo P.C.B
Step 1 Turn the CD Mechanism Unit (CR14C).

55
Step 2 Desolder 4 solder points.
Step 4 Flip over the CD Servo P.C.B.
Step 5 Detach the 16P FFC at connector (CN7001) at CD
Servo P.C.B.
Step 6 Remove CD Servo P.C.B.
9.16. Rectification for Tape Jam
Problem
Step 1 Rotate the flywheel F in the direction of the arrow to
remove it.
Step 2 Push the lever upward and open the cassette lid.
Note: Follow Disassembly of Cassette lid to remove the cas-
sette tape.

56
9.17. Disassembly of D-Amp P.C.B.
Step 1 Remove 4 screws at the Rear Panel.
Step 2 Detach 17P FFC cable at the connector (CN5050) on D-
Amp P.C.B.
Step 3 Detach 8P cable at the connector (CN5500) on D-Amp
P.C.B.
Step 4 Remove 2 screws at D-Amp P.C.B. chassis support.
Step 5 Lift up the D-Amp P.C.B. together with Inner Chassis
assembly as arrow shown.

57
Step 6 Place the D-Amp P.C.B on support block.
Step 8 Lift up to remove D-Amp P.C.B. as arrow shown.
Caution: During assembling, ensure the D-Amp P.C.B. is
seated properly on the locator of the Inner Chassis.
9.18. Replacement of Audio Digital
Power Amp IC (IC5000)
9.18.1. Disassembly of Audio Digital
Power Amp IC (IC5000)
Step 1 Flip over D-Amp P.C.B.
Step 2 Desolder pins of the Audio Digital Power Amp IC
(IC5000) on the solder side of D-Amp P.C.B.
Step 4 Remove TR Spring in the direction of arrow shown.
Step 5 Remove Audio Digital Power Amp IC (IC5000) from the
heat sink unit.

58
Caution: During replacement of the part, avoid touching
the heatsink. It may lead to injuries.
9.18.2. Assembly of Audio Digital Power
Amp IC (IC5000)
Step 1 Mount & solder the Audio Digital Power Amp IC
(IC5000) on the solder side of D-Amp P.C.B.
Step 2 Screw back TR Spring to hold the Audio Digital Power
Amp IC (IC5000) onto the Heatsink Power Unit.
Caution: Ensure the Audio Digital Power Amp IC (IC5000)
is well tightened to prevent overheat.
Note: Use a blower to remove the minute particles that might
caused left on the TR Spring.
9.19. Disassembly of Main P.C.B.
P.C.B.
Step 2 Remove 2 screws at the Rear Panel.

59
Step 3 Remove 2 screws on at bottom chassis.
Step 4 Remove the Main P.C.B. according to the arrow shown.
9.20. Disassembly of SMPS P.C.B.
Step 1 Detach 11P cable at the connector (CN5802) on SMPS
P.C.B.
Step 3 Lift up the SMPS P.C.B. as arrow shown.
Caution: During assembling and assembly on Main P.C.B.,
be careful of the electrical components on Main P.C.B.
Step 4 Flip the SMPS P.C.B. and desolder the wire’s pin (Red,
Black wires).
Caution: During assembling, ensure the SMPS P.C.B. is
seated properly at the locators.
9.21. Replacement of Switching Reg-
ulator IC (IC5701)
• Follow (Step 1) to (Step 5) of Item 9.3.
9.21.1. Disassembly of Switching Regula-
tor IC (IC5701)

60
Step 1 Desolder pins of the switching regulator IC (IC5701) on
the solder side of SMPS P.C.B.
Step 2 Remove 1 screw from the Switching Regulator IC
(IC5701).
Step 3 Remove the Switching Regulator IC (IC5701) from the
Heatsink Unit B.
Caution: Handle the Heatsink Unit B with caution due to its
high temperature after prolonged use. Touching it may
lead to injuries.
9.21.2. Assembly of Switch Regulator IC
(IC5701)
Step 1 Apply grease to the Heatsink Unit B.
Step 2 Mount the Switching Regulator IC (IC5701) to the
SMPS P.C.B.
Caution: Ensure the switching regulator IC (IC5701) is
tightly screwed to the Heatsink Unit B.
Step 3 Solder pins of the Switching Regulator IC (IC5701) on
Step 4 Screw the Switching Regulator IC (IC5701) to the Heat-
sink Unit B.

61
Caution Ensure pins of the switching regulator IC (IC5701)
are properly seated and soldered on SMPS P.C.B.
9.22. Replacement of Rectifier Diode
(D5702)
9.22.1. Disassembly of Rectifier Diode
(D5702)
Step 1 Desolder pins of the Rectifier Diode (D5702) on the Sol-
der side of SMPS P.C.B.
Step 2 Desolder pins of the Heatsink Unit B.
Step 3 Remove 1 screw from the Switching Regulator IC
(IC5701).
Step 4 Remove the Heatsink Unit B in the direction of arrows.
Step 6 Remove the Rectifier Diode (D5702) from the Heatsink
Unit B.
Caution: Handle the Heatsink Unit B with caution due to its
lead to injuries.
9.22.2. Assembly of Rectifier Diode
(D5702)
Step 1 Apply grease to the Heatsink Unit B.
Step 2 Screw the Rectifier Diode (D5702) to the Heatsink Unit
B.
Caution: Ensure the Rectifier Diode (D5702) is well tight-
ened to the Heatsink Unit B.
Step 3 Mount the Heatsink Unit B & Rectifier Diode (D5702) on
Step 4 Screw the Switching Regulator IC (IC5701) to the Heat-
sink Unit B
Caution: Ensure the Heatsink Unit B is properly seated on
SMPS P.C.B.

62
Step 5 Solder pins of the Rectifier Diode (D5702) on the solder
side of SMPS P.C.B.
Step 6 Solder pins of the Heatsink Unit B on the solder side of
SMPS P.C.B.
9.23. Replacement of Regulator
Diode (D5801)
9.23.1. Disassembly of Regulator Diode
(D5801)
Step 1 Desolder pins of the Regulator Diode (D5801) on the
solder side of SMPS P.C.B.
Step 3 Remove the Regulator Diode (D5801) from the Heatsink
Unit C.
Caution: Handle the Heatsink Unit C with caution due to its
lead to injuries.
9.23.2. Assembly of Regulator Diode
(D5801)
Step 1 Apply grease to the Heatsink Unit C.
Step 2 Mount & screw the Regulator Diode (D5801) to the
Heatsink Unit C on the SMPS P.C.B.
Caution: Ensure the Regulator Diode (D5801) is well tight-
ened to the Heatsink Unit C.
Step 3 Solder pins of the Regulator Diode (D5801) on the sol-
Caution: Ensure pins of the Regulator Diode (D5801) is
properly seated and soldered on SMPS P.C.B.
Diode (D5802)
(D5802)

63
Unit C.
lead to injuries.
(D5802)
Step 2 Mount & screw the Regulator Diode (D5802) to the
Heatsink Unit C on SMPS P.C.B.
ened to the heatsink unit C.
Caution: Ensure pins of the Regulator Diode (D5802) is
Diode (D5803)
(D5803)

64
Unit C.
lead to injuries.
(D5803)
Step 2 Mount & screw the regulator diode (D5803) to the Heat-
sink Unit C on SMPS P.C.B.
ened to the Heatsink Unit C.
Caution: Ensure pins of the regulator diode (D5803) are
9.26. Disassembly of AC Inlet P.C.B.
Step 2 Release the tab at the rear panel according to the arrow
show.
Step 3 Cut 2 tie wraps.
Step 4 Remove 2 screws on AC Inlet P.C.B.

65
Step 5 Lift up AC inlet P.C.B. from bottom chassis.
Step 6 Turn over AC Inlet P.C.B. to the solder side.
Step 7 Desolder black wire pin and red wire pin on AC Inlet
P.C.B.
Caution 1: During assembling procedure, ensure the AC
Inlet P.C.B. is seated properly at the locators.
Caution 2: Remember to use tie wraps to tie the red, black
to the bottom chassis as diagram show.
9.27. Disassembly of USB P.C.B.
Step 2 Remove the USB Unit.
Step 3 Desolder 3 pins.
Step 4 Remove USB P.C.B.

66
9.28. Disassembly of MPort/Head-
phone P.C.B.
Step 2 Release 2 catches.
Step 3 Remove MPort/Headphone P.C.B.
9.29. Assembling and Disassem-
bling of Traverse Unit Assem-
bly
9.29.1. Disassembly of Traverse Unit
Assembly
• Disassembly of Traverse Unit Assembly in play position
Step 1 Release the catch and push the guide as arrows shown
to open both grooves.
Step 2 Detach the FFC wires from the adhesive area.
Step 3 Remove the traverse unit assembly as arrows shown.

67
9.29.2. Assembly of Traverse Unit Assem-
bly
Step 1 Slot the traverse unit assembly into the guides as arrow
shown.
Note: Ensure the bosses fix exactly onto the guides.
Step 2 Place down the traverse unit assembly.
Step 3 Fix the FFC wires by using the adhesive tape.
Step 4 Release the catch and push the guide as arrows shown
to close both grooves.

68
10 Service Position
Note: For description of the disassembly procedures, see the Section 9.
10.1. Checking and Repairing of
Main P.C.B.
Note: Main P.C.B. can be checked as above position.
Panel P.C.B., Deck P.C.B., USB
P.C.B. & MPort/Headphone
P.C.B.
Step 1 Position front panel assembly according to the diagram
show.
Step 2 Connect 22P FFC at the connector (CN3200) on Main
P.C.B.
P.C.B.
Step 4 Connect 8P FFC cable at the connector (CN2012) on
Main P.C.B.
P.C.B.
P.C.B.
Step 7 Connect 2P wire at the connector (CN2001) on Main
P.C.B.
Step 8 Check and repair Panel P.C.B., Deck P.C.B., USB
P.C.B. and MPort/Headphone P.C.B.

69
10.3. Checking and Repairing of D-
Amp P.C.B.
Step 1 Position CD Mechanism Unit (CR14C) according to the
diagram show.
P.C.B.
P.C.B.
Step 4 Attach original cable with extension cable (REXX0683)
(8P cable from H5801 to CN5500).
Step 5 Connect extension cable (REEX0930) (17P FFC cable
from CN2341A to CN5050).
Step 6 Check and repair D-Amp P.C.B.
SMPS and AC Inlet P.C.B.
Step 1 Position SMPS P.C.B., AC Inlet P.C.B. according to the
diagram show.
Step 2 Attach original cable with extension cable (REXX0680)
(11P cable from CN2701 to CN5802).
Step 3 Connect 8P cable to the connector (CN5500) on D-Amp
P.C.B.
Step 4 Check and Repair SMPS and AC Inlet P.C.B.

70
11 Procedure for Checking Operation of Individual Parts of
Deck Mechanism Unit
11.1. Operation Check with Cassette Tape
1. Pull up the EJECT lever using a rubber band. (Fig. 2)
2. Supply DC5V to MOTOR. (→ MOTOR rotates.) (Fig. 1)
3. Insert a cassette tape to the unit.
4. Supply DC9V to the plunger, and turn the power ON and OFF. (→ Power +PL, -PL) (Fig. 1)
a. FWD PLAY: Supply the plunger power in a flash. (ON: approx. 5msec)
b. FWD FF: Supply the plunger power in a flash at PLAY mode. (ON: approx. 5msec)
c. STOP: Supply the plunger power in a flash at FWD FF mode. (ON: approx. 5msec)
d. REV PLAY: Supply the plunger power in a normal timing at STOP mode. (ON: approx. 200msec)
e. REV REW: Supply the plunger power in a flash at REV PLAY mode. (ON: approx. 50msec)
f. STOP: Supply the plunger power in a flash at FF mode. (ON: approx. 50msec)
Repeat the operation (→ FWD PLAY)
(Note) Other operation may start if a timing of supplying the plunger power is missed.
11.1.1. Connection Status between Mechanism and Power Supply (Motor, Plunger)
Fig. 1
11.1.2. Operative Parts of Deck Mechanism Unit (EJECT lever fitted with rubber band,
Plunger/Rib operation)
Fig. 2
11.2. Operation Check without Cassette Tape
1. Pull up the EJECT lever using a rubber band. (Fig. 2)
2. Supply DC5V to MOTOR. (→ MOTOR rotates.)
3. Lift up the mechanism unit’s plunger/rib with the tip of a negative screwdriver, and operate the unit in the same timing as
supplying the power. (Fig. 3)

72
12 Measurements and Adjustments
12.1. Cassette Deck Section
12.1.1. Requirements
• Test tape (QZZCFM) (QZZCWAT)
• Normal blank cassette tape (QZZCRA)
• Digital frequency counter
• Oscilloscope
• Electrical voltmeter
• Headphone jack output jig (Fig 1)
12.1.2. Setting of Unit
• VOLUME: MAX
12.1.3. Preparations
1. Apply under [9. Assembling and Disassembling].
2. Remove 4 screws from the mechanism unit to disassemble. under [9.10 Disassembly of Deck Mechanism Unit].
3. Connect the headphone jack output jig (Fig 1) to headphone jack.
Fig. 1
Fig. 2
12.1.4. Tape Speed Adjustment
• Normal speed adjustment (only during forward playback)
(Product reference value: 3,000±90Hz)
1. Connect a frequency indicator. (Fig 3)
2. Playback the middle portion of the test tape (QZZCWAT).
3. Adjust the motor screw so that the following output level is produced. (Fig 4)
Adjustment Range: 3,000 ± 90Hz (a constant speed)
Fig. 3

73
Fig. 4
12.1.5. Bias Voltage Check
1. Connect an electrical voltmeter. (Fig 5) (Fig 2 for location of Test point)
2. Set the function to “TAPE” position.
3. Insert a normal blank cassette tape (QZZCRA).
4. While pressing and holding down [REC( )] button, press [TAPE( )] button to pause the recording mode. (Repeat
pressing the buttons till the recording pause mode is activated.)
5. Check that the output level is within the standard range.
Standard Range: 14 ± 4mV
Fig. 5
12.1.6. Bias Frequency Check
1. Connect a digital frequency counter (Fig 6).
2. Set the function to “TAPE” position.
3. Insert a normal blank cassette tape (QZZCRA) and press “REC” mode on main unit.
4. Check that the output frequency is within the standard range.
Fig. 6
Standard Value: 100 ±8 kHz

74
13 Voltage & Waveform Chart
Note:
• Indication Voltage Values are in standard values for the unit measured by the DC electronic circuit tester (high-impedance) with
the chassis taken as standard.
Therefore, there may exist some errors in voltage values, depending on the internal impedance of the DC circuit tester.
• Circuit voltage and waveform described herein shall be regarded as reference information when probing defect point because it
may differ from actual measuring value due to difference of Measuring instrument and its measuring condition and product itself.
13.1. CD SERVO P.C.B
REF NO.
MODE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
CD PLAY 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.3 0 1.6 3.2
STANDBY 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1.6 3.4
REF NO.
MODE 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
CD PLAY 1.6 0 1.6 1.7 1.7 0 3.1 1.5 3.1 3.1 0 1.6 1.5 1.6 1.9 1.9 1.7 1.8 1.8 1.7
STANDBY 1.7 3.4 1.7 1.7 1.7 0 3.4 1.5 3.4 3.4 0 1.7 1.6 1.7 1.7 1.7 1.7 1.7 1.7 1.7
REF NO.
MODE 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60
CD PLAY 0.2 2.4 1.9 1.7 1.2 1.8 3.2 1.2 1.3 1.3 1.7 1.7 0.9 1.5 1.5 1.5 0 3.0 1.5 0
STANDBY 0 3.4 1.6 1.7 1.7 1.8 3.4 1.2 1.2 1.2 1.7 1.7 0.9 1.1 1.1 1.6 0 3.1 1.6 0
REF NO.
MODE 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80
CD PLAY 3.2 0 0 0 0 0 3.0 1.5 3.3 1.0 0.1 3.3 0 1.6 0 1.5 3.2 0 3.3 0
STANDBY 3.4 0 0 0 3.3 0 3.3 0 3.3 0 0.1 3.3 0 1.6 3.4 1.5 3.4 0 3.4 0
REF NO.
MODE 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100
CD PLAY 0 3.3 0 0 0 0 0 0 0 0 0 0 3.2 0 0 0 0 0 0 0
STANDBY 0 3.4 0 0 0 0 0 0 0 0 0 0 3.4 0 0 0 0 0 0 0
REF NO.
MODE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
CD PLAY 1.6 0 1.6 0 0 0 0 0 0 7.7 4.4 3.5 3.6 3.6 3.5 3.8 3.7 3.6 7.7 0
STANDBY 1.7 0 1.7 3.3 0 0 0 0 0 7.7 4.0 4.0 3.6 3.6 3.6 3.6 3.6 3.6 7.7 0
REF NO.
MODE 21 22 23 24 25 26 27 28 29 30
CD PLAY 7.7 0 0 0 7.7 1.6 1.6 1.6 0 0
STANDBY 7.7 0 0 0 7.7 1.7 1.7 1.7 0 0
REF NO.
MODE E C B
CD PLAY 3.1 2.0 2.4
STANDBY 3.4 0 3.4
IC7002
Q7601
SA-AK280EB/EG/EP CD SERVO P.C.B.
IC7001
IC7001
IC7001
IC7001
IC7001
IC7002

75
13.2. Main P.C.B (1/2)
REF NO.
MODE 1 2 3 4 5
CD PLAY 15.9 5.8 0 1.0 2.8
STANDBY 16.2 5.8 0 1.0 2.8
REF NO.
MODE 1 2 3
CD PLAY 15.9 0 11.8
STANDBY 16.2 0 11.8
REF NO.
MODE 1 2 3 4 5
CD PLAY 5.8 0 1.3 3.3 5.8
STANDBY 5.8 0 1.3 3.3 5.8
REF NO.
MODE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
CD PLAY 1.4 3.2 3.2 0 0 3.2 0 0 0 0.5 0.6 3.2 1.6 0 1.6 3.3 3.3 3.3 0.1 2.2
STANDBY 0.8 3.3 3.3 0 0 3.4 0 0 0 0.5 0.6 3.3 1.7 0 1.6 3.3 3.3 3.3 0.1 2.2
REF NO.
MODE 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
CD PLAY 0 0 0 3.2 0 0.1 0 0 3.3 3.3 0 0 0 0 3.1 3.2 0.1 0.1 0.1 3.2
STANDBY 0 0 0 3.2 0 0.1 0 0 3.3 3.3 0 0 0 0 3.3 3.3 0.1 0.1 0.1 3.3
REF NO.
MODE 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60
CD PLAY 0 3.2 3.2 3.3 0.8 3.2 0 3.0 0 0 0 0 0 0 0 1.5 1.6 3.3 3.3 3.3
STANDBY 0 3.3 3.3 3.3 0 3.3 0 3.3 0 0 0 0 0 0 0 1.5 1.7 3.3 3.3 3.3
REF NO.
MODE 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80
CD PLAY 3.3 3.3 3.2 0 0 0 0 3.3 0 3.2 3.3 0 3.3 3.2 0.2 0 0 0 0 3.3
STANDBY 3.3 3.3 3.2 0 0 0 0 3.3 0 3.2 3.3 0 3.3 3.2 0.2 0 0 0 0 3.3
REF NO.
MODE 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100
CD PLAY 0 2.8 0.3 2.0 0 3.3 3.3 3.3 1.2 1.4 0 3.3 3.3 3.3 3.3 0 0 3.3 3.3 0
STANDBY 0 2.7 0.3 1.7 0 3.3 3.3 3.3 1.2 1.4 0 3.3 3.3 3.3 3.3 0 0 3.3 3.3 0
REF NO.
MODE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
CD PLAY 0 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 0 3.3 3.3
STANDBY 0 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 0 3.3 3.3
REF NO.
MODE 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
CD PLAY 9.6 4.8 4.8 4.8 0.9 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 0 4.8
STANDBY 9.6 4.8 4.8 4.8 0.7 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 0 4.8
IC2801
IC2801
IC2701
IC2731
IC2741
IC2801
IC2801
IC2801
IC2803
SA-AK280EB/EG/EP MAIN P.C.B.
IC2803

76
13.3. Main P.C.B (2/2)
REF NO.
MODE 1 2 3 4 5
CD PLAY 15.9 5.8 0 1.0 2.8
STANDBY 16.2 5.8 0 1.0 2.8
REF NO.
MODE 1 2 3
CD PLAY 15.9 0 11.8
STANDBY 16.2 0 11.8
REF NO.
MODE 1 2 3 4 5
CD PLAY 5.8 0 1.3 3.3 5.8
STANDBY 5.8 0 1.3 3.3 5.8
REF NO.
MODE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
CD PLAY 1.4 3.2 3.2 0 0 3.2 0 0 0 0.5 0.6 3.2 1.6 0 1.6 3.3 3.3 3.3 0.1 2.2
STANDBY 0.8 3.3 3.3 0 0 3.4 0 0 0 0.5 0.6 3.3 1.7 0 1.6 3.3 3.3 3.3 0.1 2.2
REF NO.
MODE 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
CD PLAY 0 0 0 3.2 0 0.1 0 0 3.3 3.3 0 0 0 0 3.1 3.2 0.1 0.1 0.1 3.2
STANDBY 0 0 0 3.2 0 0.1 0 0 3.3 3.3 0 0 0 0 3.3 3.3 0.1 0.1 0.1 3.3
REF NO.
MODE 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60
CD PLAY 0 3.2 3.2 3.3 0.8 3.2 0 3.0 0 0 0 0 0 0 0 1.5 1.6 3.3 3.3 3.3
STANDBY 0 3.3 3.3 3.3 0 3.3 0 3.3 0 0 0 0 0 0 0 1.5 1.7 3.3 3.3 3.3
REF NO.
MODE 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80
CD PLAY 3.3 3.3 3.2 0 0 0 0 3.3 0 3.2 3.3 0 3.3 3.2 0.2 0 0 0 0 3.3
STANDBY 3.3 3.3 3.2 0 0 0 0 3.3 0 3.2 3.3 0 3.3 3.2 0.2 0 0 0 0 3.3
REF NO.
MODE 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100
CD PLAY 0 2.8 0.3 2.0 0 3.3 3.3 3.3 1.2 1.4 0 3.3 3.3 3.3 3.3 0 0 3.3 3.3 0
STANDBY 0 2.7 0.3 1.7 0 3.3 3.3 3.3 1.2 1.4 0 3.3 3.3 3.3 3.3 0 0 3.3 3.3 0
REF NO.
MODE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
CD PLAY 0 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 0 3.3 3.3
STANDBY 0 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 0 3.3 3.3
REF NO.
MODE 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
CD PLAY 9.6 4.8 4.8 4.8 0.9 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 0 4.8
STANDBY 9.6 4.8 4.8 4.8 0.7 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 0 4.8
IC2801
IC2801
IC2701
IC2731
IC2741
IC2801
IC2801
IC2801
IC2803
SA-AK280EB/EG/EP MAIN P.C.B.
IC2803

77
13.4. Panel P.C.B
13.5. Deck P.C.B
REF NO.
MODE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
CD PLAY 0 0 0 0 1.9 1.4 0.3 2.8 2.0 0 0 0 3.3 -20.4 16.5 24.3 -24.3 -24.3 -22.4 -18.5
STANDBY 0 0 0 0 2.0 1.3 0.5 2.7 1.6 0 0 0 3.4 -10.7 14.5 14.5 -24.3 -22.4 -22.4 -18.5
REF NO.
MODE 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
CD PLAY -14.7 -22.4 -22.4 -20.5 -16.5 -20.4 -16.6 -24.3 -20.4 -24.8 -22.8 -22.7 -22.7 -22.7 -22.7 -22.7 -22.7 -22.7 -22.7 -22.7
STANDBY -14.6 -22.4 -20.4 -20.4 -12.6 -10.7 -12.7 -24.3 -22.4 -24.8 -22.8 -22.7 -22.7 -22.7 -22.7 -22.7 -22.7 -22.7 -22.7 -22.7
REF NO.
MODE 41 42 43 44
CD PLAY -22.7 -22.7 3.3 0
STANDBY -22.7 -22.7 3.4 0
REF NO.
MODE E C B
CD PLAY 0 0.1 3.3
STANDBY 0 0.1 3.3
Q6511
SA-AK280EB/EG/EP PANEL P.C.B.
IC6601
IC6601
IC6601
REF NO.
MODE 1 2 3 4 5
CD PLAY 6.5 0 0 0 0
STANDBY 6.5 0 0 0 0
REF NO.
MODE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
CD PLAY 0.1 0.7 5.4 4.6 0 3.3 0 0.1 0.1 6.4 0 9.5 0 0 0.1 0 3.9 0.3 4.6 5.4
STANDBY 0.1 0.7 5.4 4.6 0 3.3 0 0.1 0.1 6.4 0 9.5 0 0 0.1 0.1 4.0 0.3 4.6 5.4
REF NO.
MODE 21 22
CD PLAY 0.7 0.1
STANDBY 0.7 0.1
REF NO.
MODE E C B E C B E C B E C B E C B
CD PLAY 0 6.5 0.6 6.5 0.1 6.5 0 9.5 0.1 0 9.5 0.1 0 0.1 0
STANDBY 0 6.5 0.6 6.5 0.1 6.5 0 9.5 0.1 0 9.5 0.1 0 0.1 0
REF NO.
MODE E C B E C B E C B
CD PLAY 11.8 -0.8 11.8 0 10.3 -0.7 0 0 0.1
STANDBY 11.8 -0.6 11.8 0 10.3 -1.3 0 0 0.1
SA-AK280EB/EG/EP DECK P.C.B.
IC1000
IC1001
IC1001
Q1312
Q1314 Q1316 Q1317
Q1303 Q1304 Q1309 Q1310

78
13.6. USB P.C.B
13.7. D-Amp P.C.B
REF NO.
MODE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
CD PLAY 0.7 0.7 0.7 0 0 0 3.3 3.3 3.3 1.8 1.6 1.6 0 0 0 0 3.3 3.3 3.3 0.7
STANDBY 0.7 0.7 0.7 0 0 0 3.4 3.3 3.4 1.8 1.6 1.6 0 0 0 0 3.4 3.4 3.4 0.7
REF NO.
MODE 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
CD PLAY 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 3.3 0.7 0
STANDBY 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 3.4 0.7 0
REF NO.
MODE 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60
CD PLAY 0.7 1.8 0.7 0 0.7 3.3 0.3 3.3 3.3 0 3.3 0.7 0 0 0.7 3.0 1.0 1.0 0 0.7
STANDBY 0.7 1.8 0.7 0 0.7 3.3 0.3 3.3 3.4 0 3.4 0.7 0 0 0.7 3.3 0 0 0 0.7
REF NO.
MODE 61 62 63 64
CD PLAY 0 1.8 0.7 3.3
STANDBY 0 1.8 0.7 3.3
SA-AK280EB/EG/EP USB P.C.B.
IC900
IC900
IC900
IC900
REF NO.
MODE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
CD PLAY 2.5 0 0 29.0 0 -29.0 -20.6 29.3 8.9 0 -29.3 -19.2 -29.3 -0.1 8.9 29.3 -29.0 -29.0 0 29.0
STANDBY 2.5 0 0 29.0 0 -29.0 -20.6 29.3 8.9 0.1 -29.3 -19.2 -29.3 -0.1 8.9 29.3 -29.0 -29.0 0 29.0
REF NO.
MODE 21 22 23
CD PLAY 0 0 2.5
STANDBY 0 0 2.5
REF NO.
MODE 1 2 3 4 5 6 7 8 9 10 11 12 13 14
CD PLAY 0 5.2 4.9 0 2.7 2.2 0 2.5 2.6 2.6 2.5 2.5 2.6 5.2
STANDBY 0 5.2 4.9 0 2.7 2.2 0 2.5 2.6 2.6 2.5 2.5 2.6 5.2
REF NO.
MODE 1 2 3 4 5 6 7 8 9 10 11 12 13 14
CD PLAY 2.5 2.6 2.5 0 2.6 0 0 0 0 0 0 0 5.2 5.2
STANDBY 2.5 2.6 2.5 0 2.6 0 0 0 0 0 0 0 5.2 5.2
REF NO.
CD PLAY 0 5.2 0 0 5.1 0 0 0 0.7 5.2 5.2 4.5 0 0 0.7
STANDBY 0 5.2 0 0 5.2 0 0 0 0.7 5.2 5.2 4.5 0 0 0.7
Q5604
SA-AK280EB/EG/EP D-AMP P.C.B.
IC5000
IC5000
IC5500
IC5501
Q5101 Q5102 Q5601 Q5603

79
13.8. SMPS P.C.B
13.9. Deck Mechanism P.C.B
REF NO.
MODE 1 2 3 4 5 6 7
CD PLAY 162.0 0 0 19.3 0.1 1.4 0.5
STANDBY 162.0 0 0 19.3 0.1 1.4 0.5
REF NO.
MODE 1 2 3 4 5 6 7 8
CD PLAY 6.0 1.6 1.8 20.3 162.2 0 0 0
STANDBY 6.0 1.6 2.0 20.3 163.0 0 0 0
REF NO.
MODE 1 2 3
CD PLAY -2.2 -29.5 -26.8
STANDBY -2.2 -29.5 -26.8
REF NO.
MODE 1 2 3
CD PLAY 4.2 0 2.5
STANDBY 4.2 0 2.5
REF NO.
CD PLAY 5.9 6.5 5.6 19.9 19.9 19.2 0 17.0 0.1 -21.9 -2.2 -22.0 0 5.8 0
STANDBY 5.9 6.6 5.6 19.9 19.9 19.2 0 16.8 0.1 -21.8 -2.2 -22.0 0 5.8 0
REF NO.
CD PLAY 1.3 0 0.7 0 0 0.7 0 5.2 0 0 3.2 0.5 0 5.0 0
STANDBY 1.3 0 0.7 0 0 0.7 0 5.2 0 0 3.2 0.5 0 5.0 0
REF NO.
MODE E C B E C B
CD PLAY 0 4.5 0 0 0.1 5
STANDBY 1.5 1.5 0 0 0 5
Q5860 Q5861 Q5862 Q5898
IC5701
IC5799
IC5801
IC5899
SA-AK280EB/EG/EP SMPS P.C.B.
Q5720 Q5721 Q5722 Q5802 Q5803
QR5801
QR5802 QR5810
REF NO.
MODE 1 2 3 4
CD PLAY 3.3 2.2 0.2 3.3
STANDBY 3.3 2.2 0.2 3.3
SA-AK280EB/EG/EP DECK MECHANISM P.C.B.
IC971

80
13.10. Waveform Table (1/2)
WF No. IC2801-13 (PLAY)
3.1Vp-p(20nsec/div)
WF No. IC2803-5,33,35 (PLAY)
3Vp-p(1msec/div)
WF No. IC2803-4,36 (PLAY)
0.4Vp-p(200usec/div)
3Vp-p(200usec/div)
3.2Vp-p(1msec/div)
0.56Vp-p(1msec/div)
0.6Vp-p(1msec/div)
2.1Vp-p(20nsec/div)
2.2Vp-p(1msec/div)
2Vp-p(500usec/div)
WF No. IC2803-42,50 (PLAY)
2Vp-p(500usec/div)
5Vp-p(200usec/div)
1.4Vp-p(1msec/div)
5.6Vp-p(500nsec/div)
5.6Vp-p(1usec/div)
WF No. IC5000-10,14 (PLAY)
80Vp-p(1usec/div)

81
13.11. Waveform Table (2/2)
WF No. IC5799-2 (PLAY) WF No. IC5799-3 (PLAY)
2Vp-p(5usec/div) 9.6Vp-p(5usec/div)
240Vp-p(50usec/div)
WF No. IC5899-1,2,3 (PLAY)
1.65Vp-p(5msec/div)
1.5Vp-p(1usec/div)
400Vp-p(2usec/div)
2Vp-p(5usec/div)
5.2Vp-p(1usec/div)

82
14 Illustration of ICs, Transistor and Diode
B0HCSP000001
B0BC035A0007
B1GFGCAA0001
C0DBGYY00089 (5P)
RFKWEAK280PN
(8P)
RFKWMAK280PN (100P)
C1AB00003093 (52P)
C0HBB0000057 (44P)
MNZSFB5KJM2 (64P)
MN6627954AMA (100P)
C0DAAYG00001
C0JBAB000902 (14P)
C0JBAF000716 (14P)
C1BB00001137 (16P)
C1AA00000612 (5P) C0AABB000125 (8P)
BA5948FPE2 C0CAAKG00046 C1BA00000487 (23P) C0DABFC00002 (3P)
C0DAEMZ00001 (3P)
CNB13030R2AU C5HACYY00003 (7P) MIP4110MSSCF B1BACD000018 B1BACG000023
B1BCCG000002
B1ABGC000005
B1GBCFJJ0051
B1ABCF000176
B1ADCF000001
B1ADCE000012
B1GBCFJN0033
B1GBCFLL0037
B1GDCFGA0018
B1ABCF000011
B1GDCFGH0002
2SA207700L
UNR221400L
B1GBCFGH0001
2SC3940ARA
B1AAJC000019
B1BABK000001
B1ACKD000005
2SD09650RA
B1ACKD000006
MAZ80560ML
MAZ80510ML
MAZ80750ML
MAZ80820ML
MAZ810000L
MAZ81800ML
MAZ82400HL
B1AAGC000006 MA2J11100L
MA2J72800L
B0ZAZ0000052 B0EAKM000117 B3AAA0001031
B0HFRJ000012 B0ADCJ000020 B0JCPD000025 MA2C16500E
B0HBSM000043B0ACCK000005 B0FBAR000041
B0JAME000114
B0EAMM000057
B0HAMP000094
B0BC019A0007
AN7326K (22P)
B0BC2R4A0006
B0BC6R100010
B0BC8R100004
No.1

83
15 Block Diagram
15.1. CD SERVO
SERVO PROCESSOR
MN6627954AMA
IC7001
40 A
39 C
38 B
69
MUTE
[CH1]
LEVEL
SHIFT
LEVEL
SHIFT
LEVEL
SHIFT
LEVEL
SHIFT
[CH3]
[CH4]
[CH2]
[CH1]
MUTE
[CH2]
D3+
16
D3-
15
D4+
18
D4-
17
D2+
14
D2-
13
D1+
12
D1-
11
IN3
28
VREF
26
IN4
27
IN2
1
IN1
3
PC1
4
PC2
2
4CH DRIVER
BA5948FPE2
IC7002
OPTICAL PICKUP UNIT
37 D
36 F
35 E
PD
42 LD
46 RFIN
80 X2
81 X1
41
45 RFOUT
51 ARFIN
50 ARFFB
49 ARFOUT
25 FOP
24 TRP
23 TRVP
21 SPOUT
22 PC
MOTOR
SPINDLE
M
MOTOR
TRAVERSE
M
CN7001
14
CN7001
13
CN7001
16
CN7001
15
CN7001
11
CN7001
4
LASER
POWER DRIVE
Q7601
CN7001
7
CD 3.3V
CN7001
9
CN7001
2
CN7001
3
12 11
CN2801CN7002
14 9
CN2801CN7002
13 10
CN2801CN7002
11 12
CN2801CN7002
10 13
CN2801CN7002
18 5
CN2801CN7002
17 6
CN2801CN7002
16 7
CN2801CN7002
MLD
70STAT
67MCLK
9 14
CN2801CN7002
68MDATA
72NRST
71BLKCK
62SRDATA
63LRCK
64BCLK
22 1
CN2801CN7002
20 3
CN2801CN7002
4 19
CN2801CN7002
56OUTL
59OUTR
X7201
T+
T-
F+
F-
E
F
B
A
LD
LPD
FO GAIN
TRV GAIN
FROM/TO
MAIN (1/2)
TO MAIN (2/2)
TO
MAIN (1/2)
: CD AUDIO INPUT SIGNAL LINE
SA-AK280EB/EG/EP CD SERVO BLOCK DIAGRAM
VREF

84
15.2. Main (1/2)
CN2801
1
1
F-F-
MICRO-PROCESSOR
RFKWMAK280PN
83FL DOUT
82FL CLK
84FL CS
IC2801
95BASS JOG1
90V JOG A
20SYNC
78DECK MOTOR
79DECK PLUNGER
77DECK REC
87DECK AD2
86DECK AD1
75DECK PHOTO
67MOD DA
69FHOP
68DC DET AMP
70MUTE F
2BASS JOG2
3VOL LED
17 11
CN6001CN2806
15 13
CN6001CN2806
16 12
CN6001CN2806
SA-AK280EB/EG/EP MAIN (1/2) BLOCK DIAGRAM
93KEY2
92KEY3
94KEY1
18RMT
88ROTARY JOG
48 MCLK
32 IPOD RXD
34 BUSY
31 IPOD TXD
47 MDATA OUT
CCW
CW
28
27
48 IPODVC
49 IPOCHG
47 IPOD DET
15 XIN
40 CD OPEN SW
43 RESETSW
56 RDS DATA
44 CD RST
42 CR14 CD LOAD (H)
41 CR14 CD LOAD (L)
45 STATUS
29 USB SCL
19 BLKCK
46 MLD
30 USB SDA
13 XOUT
10 XCIN
11 XCOUT
12 /RESET
70 FSHIFT
8
3
5
9
1
7
8
9
5 30
GR1
GR12
SG1
SG16
GR1
GR12
SG1
SG16
F+
C0HBB0000057 FL6601
FL DISPLAY
T2900
SWITCHING
TRANSFORMER
PSAVE
CONTROL
Q2900
DC18V
FP2901D IN
STB
CLK
VEE
D2903
D2908
D2909
IC6601
FL DISPLAY DRIVER
1
44
30
20 8
CN2806CN6001
21 7
CN2806CN6001
23 5
CN2806CN6001
54STREQ
59STCLK
56CD CLK
51TERR
58CD DATA
64CD MLD
57CD STAT
8CD NRST
48I2C DATA/ERROR
47I2C REQ/WR START
50VERR
46I2C CLK/WR END
7 MMOD0 ERROR
4 USB VE
9 CNVSS
6 USB TE
22
CN3200P901
19
CN3200P901
16
CN3200P901
13
CN3200P901
15
CN3200P901
8
CN3200P901
14
CN3200P901
11
CN3200P901
17
CN3200P901
10
CN3200P901
18
CN3200P901
6
CN3200P901
5
CN3200P901
4
CN3200P901
3
CN3200P901
61STIN
14NRST
15MMOD0
5 USB IRQ/WR START
33 USB RST
FOR SOFTWARE
6
CN2811
CN2811
CN2811
2
8
7
CN2811
CN2811
CN2811
4
1
USB PORT
P903
2D-
3D+
1 VBUS
4 USBD-
12 OSC0
6 USBD+
X900
11 OSC1
18 5
CN2801CN7002
17 6
CN2801CN7002
16 7
CN7002
14 9
CN2801CN7002
13 10
CN2801CN7002
12 11
CN2801CN7002
10 13
CN2801CN7002
11 12
CN2801CN7002
9 14
CN2801CN7002
4 19
CN2801CN7002
5 18
CN2801CN7002
3 20
CN2801CN7002
RESET
Q2812
VREF
X2815
X2910
CN5802CN2701*
1
VR6882
ROTARY JOG
19 9
CN6001CN2806
DVREF
REMOTE
CONTROL SENSOR
Z6601
VREF
27 1
CN6001CN2806
EJECTTAPE REC
S6107S6104S6100
POWER
S6109
DBASS
23 5
CN6001CN2806
CD DISC 2 CD DISC 3 CD DISC 4CD DISC 1
S6203 S6204 S6205S6202S6201S6200
EXCHANGEOPEN/CLOSE
S6206
CD DISC 5
S6207
STOP/DEMO
22 6
CN6001CN2806
CDFM/AMM.PORT/AUX MANUAL EQ+
S6303S6304S6305 S6302 S6301 S6300
MANUAL EQ MANUAL EQ-
S6306
TAPE
S6307
USB
21 7
CN6001CN2806
VR6630
D.BASS JOG
25 3
CN6001CN2806
24 4
CN6001CN2806
VR6500
VOLUME JOG
20 8
CN6001CN2806
DVREF
D6512D6511Q6511
LED SUPPLY
26 2
CN6001CN2806
D2811
D2810
LED DRIVE
INVERTER
Q2012
MUTING CONTROL
Q3000, Q3001, Q3002
74PCONT
72SMPS BP
73DC DET PWR
36ASP CLK
63MUTE A
INVERTER
Q2011
PL DRIVE
Q2015
12 1
CN1303CN2011
13 5
CN5050CN2341A
10
CN5802CN2701*
11
CN5802CN2701*
17 1
CN5050CN2341A
6 7
CN1303CN2011
8 3
CN1304CN2012
5 4
CN6807CN2807
2
CN5050
DECK AD2
ASP CLK
MUTE A
ASP DA
DECK AD1
PHOTO
14
16
4
CN5050CN2341A
CN2341A
4 5
CN6807CN2807
35ASP DAT
81MPORTSW
80HP SW
23 EE DAT
22 EE CLK
21 EE CS
TUNER
Z3601*
TU SCLK
TU SDA
TU SD
TU ST 6
4
3
2
POWER CONTROL
Q2745
POWER SUPPLY
Q2743
VOLTAGE
REGULATOR
C0DBGYY00089
IC2741
5IN
1CTRL
4 OUT
DC DET PWR
5V
: USB SIGNAL LINE
IC900
USB CONTROLLER
MNZSFB5KJM2
11
CN2805CN2
10
CN2805CN2
9
CN2805CN2
6
CN2805CN2
3
CN2805CN2
5
CN2805CN2
8
CN2805CN2
7
CN2805CN2
MOTOR
TRAY
LOADING
BA6956AN
TRAY LOADING MOTOR DRIVE
FOR REFERENCE ONLY
PHOTO INTERRUPTOR
(OPEN)
Q5
PHOTO INTERRUPTOR
(CLOSE)
Q2
PHOTO INTERRUPTOR
(HOME)
Q3
PHOTO INTERRUPTOR
(UD)
Q1
PHOTO INTERRUPTOR
(MODE)
Q4
VCC
VREF
IC1
CONTROLDRIVE
VCC
OPEN
CLOSE
HOME SW
UD
MODE
TOP
SW3 (TOP)
VCC
4
2
6
1
9
7
VCC
OPEN SW39
CLOSE SW37
HOME SW38
UD SENSOR26
MODE SW24
TOP SW25
S7202 CD OPEN
S7201 REST SW
IC2951
EEPROM
RFKWEAK280PN
3DI
4DO
2SK
1CS
60 TU SCLK
59 TU SDA
61 TU SD
58 TU ST
FROM/TO
CD SERVO
FROM/TO
DECK
FROM/TO
D-AMP
FROM/TO
POWER
FROM/TO
MAIN (2/2)
SYS6V
VREF
57 RDS CLK
IC2809
RDS
C1BB00001137
2RDQA
16RDCL
TUNER
Z3601*
DET OUT 8 4 MPXIN
14 XOUT
13 XIN
X2901

85
15.3. Main (2/2)
IC2803
AUDIO SIGNAL PROCESSOR
C1AB00003093
22LOUT
34REC-L
37 TUNER L
19 SDA
4 TAPE R
20 SCL
2 CD/USB R
42 AUX L
50 AUX R
52 MP R
40 MP L
36 TAPE L
3 TUNER R
38 CD/USB L
7PRE-IN-R
6REC-R
33PRE-IN-L
17ROUT
C0AABB000125
IC2804
OP-AMP (FRONT)
2
3
1
-
+
-
+
6
7
5
AUX
JK2801
2
1
3
4
LCH
RCH
MUSIC PORT
JK6810
5
4
3
2
1
6
7
LCH
RCH
5
4
3
2
1
6
7
LCH
RCH
JK6800
HEADPHONE
TU L
TU R
5
7
Z3601*
TUNER
122
CN2801CN7002
320
CN2801CN7002
49
CN2011CN1303
58
CN2011CN1303
ASP DA
ASP CLK
45
CN2807 CN6807
1 8
CN2807CN6807
3 6
CN2807CN6807
MUTING
Q2311
MUTING
Q2335
1 17
CN5050CN2341A
3 15
CN5050CN2341A
7 6
CN1303CN2011
8 5
CN1303CN2011
5 4
CN2807CN6807
3 6
CN6807CN2807
1 8
CN6807CN2807
MUTING
Q2359
MUTE A
MUTING
CONTROL
QR2317
5PRE-OUT-R
FROM/TO
MAIN (1/2)
FROM DECK
FROM CD SERVO
35PRE-OUT-L
TO
D-AMP
TO DECK
TO
MAIN (1/2)
FROM
MAIN (1/2)
: AUDIO OUTPUT SIGNAL LINE: CD/TAPE AUDIO INPUT SIGNAL LINE : FM/AM SIGNAL LINE: AUX/M.PORT INPUT AUDIO SIGNAL LINE : USB SIGNAL LINE
SA-AK280EB/EG/EP MAIN (2/2) BLOCK DIAGRAM

86
15.4. D-Amp
+
-
+
-
3 15
CN5050
CN5050
CN2341A
CN2341A
CN5050CN2341A
CN5050CN2341A
CN5050CN2341A
CN5050CN2341A
1 17
17 1
13 5
14 4
16 2
IC5500
INVERTER GATE
(CLOCK GENERATOR)
C0JBAB000902
X5500X5501
D5501
D-TYPE FLIP-FLOP
C0JBAF000716
CP1 O1
IC5501
6 810 9
14
14
11 3
D15
4 6
O1 2
154321
CD1 SD1
D5502 FAN DC
SWITCH
Q5601
SWITCH
Q5603
SWITCH
Q5604
IN1M
IN2M
IN1P
IN2P
SGND1
SGND2
OSC
MODE
INPUT
STAGE
INPUT
STAGE
CONTROL
AND
HANDSHAKE
TEMPERATURE SENSOR
CURRENT PROTECTION
VOLTAGE PROTECTION
PWM
MODULATOR
OSCILLATOR MANAGER
STABI
RELEASE2
SWITCH2
ENABLE2
MUTE
MUTE
MODE
2
3
5
19
23
1
21
22
PWM
MODULATOR CONTROL
AND
HANDSHAKE
DRIVER
HIGH
DRIVER
LOW
DRIVER
HIGH
DRIVER
LOW
RELEASE1
SWITCH1
ENABLE1
STABI
PROT
VDDP2
VSSP2VDDP1
VSSP1
BOOT1
BOOT2
OUT1
OUT2
IC5000
C1BA00000487
AUDIO DIGITAL POWER AMP
9
10
15
14
1311
81612 7
- 30V SENSE + 30V SENSE
- 30V SENSE
FRONT L
FRONT R
SPEAKERS
3
JK5001
4
JK5001
1
JK5001
2
JK5001
DC DETECT
Q5101,Q5102
TH5001
FRONT R
MOD DA
MUTE F SW
FRONT L
FHOP
DC DET
FL +
FR +
: AUDIO OUTPUT SIGNAL LINE
SA-AK280EB/EG/EP D-AMP BLOCK DIAGRAM
FROM
MAIN (1/2)
FROM MAIN (2/2)
FROM MAIN (2/2)
FROM/TO
MAIN (1/2)

87
15.5. Deck
19
4
PB LOUT
REC LIN
REC RIN
PB ROUT
16
7
TPS OUT
PB/REC SW
6
9
PB RIN1
PB LIN22
REC LOUT15
REC ROUT8
LCH
R/P HEAD
RCH
R/P HEAD
ERASE HEAD
: AUDIO OUTPUT SIGNAL LINE: TAPE AUDIO INPUT SIGNAL LINE
PB/REC PRE AMP
AN7326K
IC1001
9 4
CN2011CN1303
8 5
CN2011CN1303
7 6
CN2011CN1303
3 8
CN2012CN1304
1 12
CN2011CN1303
6 7
CN2011CN1303
5 8
CN2011CN1303
CN1301
4
CN1301
3
CN1301
2
CN1301
5
4
2 3
5
GND
CTRL2
CTRL1
HEAD SW
AUDIO HEAD SWITCH
C1AA00000612
IC1000
BEATPROOF
SWITCH
Q1317
SWITCH
Q1312
MOTOR
DRIVE
Q1316
MOTOR DRIVE
CONTROL
Q1314
L1301
6
4
5
1
3
2
D1301
Q1309, Q1310
BIAS
SWITCH INVERTER
Q1304, Q1303
310
CN1303CN2011
PHOTO INTERUPTOR
CNB13030R2AU
IC971
VREF
D951
-
2
-
1
WR1903*
WR1903*
MOTOR
M
5 6
CN2012CN1304
1 10
CN2012CN1304
2 9
CN2012CN1304
6 5
CN2012CN1304
PHOTO
DECK AD2
DECK AD1
MOTOR 9V
MOTOR 9V
S951 MODE
S952 HALF
S953 REC SW
VREF-
FROM/TO
MAIN (2/2)
FROM/TO
MAIN (1/2)
SA-AK280EB/EG/EP DECK BLOCK DIAGRAM

88
15.6. Power
D5701
Q5720,
Q5722
CURRENT
LIMITING
SWITCH
Q5721
SWITCHING SWITCHING
REGULATOR
C5HACYY00003
VCC
D
FB
4
1
6
IC5701
TH5701
MAIN
TRANSFORMER
T5701
T5751
D5896
D5798
PC5799
FEED BACK
BACKUP
TRANSFORMER
PC5701
FEED BACK
D
VCC
FB
SWITCHING
REGULATOR
MIP4110MSSCF
PC5702
SYNC
SWITCH
5
4
2
3
2
6
7
3 CL
IC5799
D5804
D5803
D5805
D5801
D5802
Q5860,Q5861,Q5862
TRANSFORMER
TEMP. DETECT
3
1
2
FEED BACKFEED BACK CIRCUIT
C0DAEMZ00001
SHUNT
REGULATOR
IC5899
PC5720
SHUNT
REGULATOR
IC5801
Q5802, D5806
C0DABFC00002
TH5860
QR5801
DC DETECT
3, 4
H5801*
7, 8
H5801*
5
CN5802CN2701
8, 9
CN5802CN2701
- 30V SENSE
- 13V
DC18V
+ 30V SENSECN5500
CN5500
Q5803
SWITCHING
5
2
8
4
7
18
15
17
11
14
QR5802
DC DETECT
C0CAAKG00046
SWITCHING
REGULATOR
+12V REGULATOR
C0DAAYG00001
OUT VCC 12
OUT VCC 13
Q2761
-9V REGULATOR
Q2763
POWER
CONTROL
Q2751
+9V REGULATOR
Q2711
+3.3V REGULATOR
4
CN5802CN2701
IC2731
IC2701
MAIN (1/2)
TO
PCONT
SYNC
SYS6V
MAIN (1/2)
TO/FROM
+ 30V SENSE
A9V
- 30V SENSE
1
H5801*CN5500 FAN 18V
FAN DC
2
CN2011CN1303
FROM
MAIN (1/2)
AMBP
Q2771, Q2772
DC DETECT
Q2735
+7.5V REGULATOR
CD 3.3V
MOTOR 9V
+7.5V
11
LED SUPPLY
-9V
DC DET PWR
10
CN2701* CN5802
1
CN2701* CN5802
11
CN2701* CN5802
SA-AK280EB/EG/EP POWER BLOCK DIAGRAM
L5701
DZ5701
F1
AC IN
P5701
L5703
QR5810
INVERTER
Q5898
INVERTER

89
16 Wiring Diagram
SA-AK280EB/EG/EP WIRING CONNECTIONNOTE: " * " REF IS FOR INDICATION ONLY.
TO OPTICAL
PICKUP UNIT
CN7002
CN7001
1615
1 2
22
21
22
21
2
1
2
1
CN6807
JK6800
HEADPHONE
JK6810
ZJ6801*
MUSIC
PORT
TO MOTOR
TO R/P HEAD
WR1903* CN1303
CN1301
2
17
8
7 6
54
3
2
1
7 6
54
3
2
1
1 2
1
2
1
2
11
12
1
2
3
4
5
FOR SOFTWARE
TUNER PACK
TO CR14C
MECHANISM UNIT
CN2801
CN2805
CN2806 CN3200CN2011CN2807
CN2701* CN2341A
CN2811
CN2001
JK2801
AUX
Z3601*
CN2012
2
1
21
22
2
1
10
11
1
2
1
2
27
27
26
26
2
1 21
22
2
1
2
1
11
12
11
12
2
1
2
1
7
8
7
8
1
11
2
1
2
1 16
17
16
17
2
17
8
1
2
3
2
1
4
10
9
8
7
6
5
4
3
2
1
2
1
2
1
9
10
9
10
CN6001
Z6601
VR6500
VOLUME
VR6630
VR6882
D.BASS
ROTARY
SENSOR
1
2
27
26
1 2 3
13 2
1 2 3
123
CN1304
SOLENOID
PL-PL+
1
2
9
10
P901P903
USB
PORT
1
2
22
21
4
3
2
1
5
6
P5701 BLK
RED
AC IN
220V-240V
50Hz
(SWITCHING
TRANSFORMER)
T2900
SPEAKERS
CN5050
CN5500
JK5001
2
1
16
17
1
8
4
3
2
1
RED
BLK
(MAIN TRANSFORMER)
CN5802
T5751
T5701
(BACKUP TRANSFORMER)
H5801*
1
11
1
8
A CD SERVO P.C.B.
(SOLDER SIDE)
B MAIN P.C.B.
(SOLDER SIDE)
C PANEL P.C.B.
(SOLDER SIDE)
D MPORT/HEADPHONE P.C.B.
(SOLDER SIDE)
E DECK P.C.B.
(SOLDER SIDE)
F DECK MECHANISM P.C.B.
(SOLDER SIDE)
G USB P.C.B.
(SOLDER SIDE)
H D-AMP P.C.B.
(SOLDER SIDE)
I SMPS P.C.B.
(SOLDER SIDE)
J AC INLET P.C.B.
(SOLDER SIDE)
PbF
PbF
PbF
PbF
PbF
PbF
PbF
PbF
PbF
PbF

91
17 Schematic Diagram Notes
• This schematic diagram may be modified at any time with the development of new technology.
Notes:
• Important safety notice:
Components identified by mark have special characteris-
tics important for safety.
Furthermore, special parts which have purposes of fire-retar-
dant (resistors), high quality sound (capacitors), low-noise
(resistors), etc are used.
When replacing any of components, be sure to use only
manufacturer’s specified parts shown in the parts list.
• In case of AC rated voltage Capacitors, the part no. and val-
ues will be indicated in the Schematic Diagram.
AC rated voltage capacitors:
C5700, C5701, C5703, C5704, C5705, C5706, C5707
• Resistor
Unit of resistance is OHM [Ω] (K=1,000, M=1,000,000).
• Capacitor
Unit of capacitance is µF, unless otherwise noted. F=Farads,
pF=pico-Farad.
• Coil
Unit of inductance is H, unless otherwise noted.
• *
Ref is for indication only.
• Voltage and signal line
S951: Mode switch.
S952: Half switch.
S953: Rec switch.
S6100: Power switch.
S6104: Tape Rec switch.
S6107: Eject switch.
S6109: D.Bass switch.
S6200: Open/Close switch ( ).
S6201:
Exchange ( ) switch.
S6202: CD Disc 1 ( ) switch.
S6207: Stop/-Demo ( -DEMO) switch.
S6300: Manual EQ- ( / ) switch.
S6301: Manual EQ (MANUAL EQ) switch.
S6302: Manual EQ+ ( / ) switch.
S6303:
CD ( / ) switch.
S6304: FM/AM switch.
S6305: M.PORT/AUX switch.
S6306:
Tape (TAPE ) switch.
S6307:
USB (USB / ) switch.
S7201: REST switch.
S7202: CD Open switch.
VR6630: D.BASS Jog.
VR6500: Volume Jog.
VR6882: Rotary Jog.
: +B signal line
: -B signal line
: CD/Tape Audio input signal line
: AUX/M.Port input Audio signal line
: Audio output signal line
: USB signal line
: FM/AM signal line
: Tape audio signal line
: M.Port Audio input signal line

93
18 Schematic Diagram
18.1. CD SERVO Circuit
AA CD SERVO CIRCUIT
SCHEMATIC DIAGRAM - 1
SA-AK280EB/EG/EP CD SERVO CIRCUIT
BTO
MAIN CIRCUIT
(CN2801)
IN SCHEMATIC
DIAGRAM - 2
: CD AUDIO INPUT SIGNAL LINE: +B SIGNAL LINE
A
B
C
D
E
F
G
H
1 2 3 4 5 6 7 8 9 10 11 12 13 14
1 2 3 4 5 6 7 8 9 10 11 12 13 14
A
B
D
E
F
H
G
C
C7223
6.3V4R7
50V1
C7227
MAZ80560ML
D7650
50V1
C7228
1K
R7217
C7218
0.082820
R7212
C7217
0.1
C7225
1000P
R7218
1K
C7226
1000P
100R7221
C7230
0.1
C7231
6.3V220
82K
R7211
0.1C7263
LB72620
0
0LB7264
LB7263
C7241
1000P
C7216
680P
C7244
0.015
C7102 0.47
0.1C7204 16V10
C7235
C7161
0.1 C7234
0.1C7203
6.3V220
C7315
0.47
88
C7339
0.018
10K
R7328
3.3K
R7315
R7330
5.6K
10K
R7111
C7142 3300P
C722115P
C7222
15P
10C7164
10C7165
C7232
6.3V220
1KR7254
470P
C7253
C7166
0.01
0.1
C7233
10R7253
R7214
470
1M
R7220
H0H169500013
X7201
S7202
CD OPEN
0.1
C7243
6
5
8
9
11
12
10
18
15
17
16
20
19
13
14
7
2
1
4
3
22
22
1
21
CN7002
S7201
REST SW
0.022C7107
C7155 0.1
0.1C7154
C72640.1
79
77
76
78
49
47
48
50
7471 7267 685655 58575251 5453 65 6661 6259 60 6463 7069 73 75
10 8 7912 11
99
100
95
94
96
97
90
91
89
93
92
98
46 5 2 13
81
82
80
86
87
88
84
83
85
45
19 17 15 141618
43
23 21 2022
41
24
39
37
33
35
34
29
30
27
26
28
32
31
36
38
25
40
42
44
13
46
MN6627954AMA
IC7001
C7601
6.3V33
4.7
R7601
C7614
6.3V100
C7670
0.1
C7626
0.1
B1ADCF000001
Q7601
5.6R7650
LASER POWER DRIVE
+
M7302*
SPINDLE MOTOR
4CH DRIVER
39
+
M7301*
TRAVERSE MOTOR
C7334
10V220
C7335
0.1
C7613 0.1
6
5
8
9
10
12
11
7
2
1
4
3
14
13
16
15
CN7001
TO
OPTICAL
PICKUP UNIT
28
100
R7335
10
R7336
1K
R7332
27K
R7331
6.8K
R7323
330
R7325
1K
R7327
18K
R7349
1K
R7329
C7352
0.018
C7338
0.027
1K
R7339
GND1
191817 2015 16
14 12 9 811 1013
22 233021 282724 25 26
2 16729 345
IC7002
BA5948FPE2
A. GND
LCH OUT
TX
MCLK
RST
3.3V
STAT
7.5V
MLD
LD SW
P. GND
D. GND
BLKCK
MDATA
3.3V
REST SW
LOADING
CD OPEN SW
RCH OUT
SRDATA (ST_IN)
BCLK (ST_CLK)
LRCK (ST_REQ)
[51] ARFIN
IREF
OUTR
OUTL
TX
MLD
MCLK
NRST
STAT
FLAG
PLLF
DVDD2
AVSS1
DVSS3
BLKCK
MDATA
AVDD1
PLLF0
ARFFB
[52] DSLF
[74] SMCK
[75] PMCK
[1] A9
[2] A11
[24] TRP
CD SIGNAL PROCESSOR
[25] FOP
RFIN X2
X1
REGON
A
B
F
E
D
C
PD
LD
D5
D7
D8
D9
D15
D13
D11
D10
D12
D14
D6
SDRCK
DRVDD
VREF
TRVP
BA1
A0
A2
A4
A6
A8
A7
A5
A3
A1
A10
NWE
BA0
PC
NRAS
NCAS
PRAMVDD33
PRAMVDD15
PRAMVSS33
SPOUT
NTEST
D1
D3
D4
D0
D2CENV
AVDD2
RFENV
AVSS2
IODD2
DVSS1
DVDD1
OSCIN
RFOUT
IODD1
DVSS2
DQSYTXT
ARFDC
NSRVMONON
EXT1/LRCK(ST_REQ)
EXT2/BCLK(ST_CLK)
EXT0/SRDATA(ST_IN)
F
A
B
E
GND
T-
F-
F+
T+
LPD
VREF
LD GND
GND (GUARD)
GND (GUARD)
LD
VCC
ARFOUT
PVCC1
D4+D1-
PVCC2
NC
NC
NC
NC
NC
NC
NC
IN2
NC
PC1
PC2
IN1
GND
PGND1
FOGAIN
GND
IN4
IN3
VCC
VREF
PGND2
D3+D2-
D3-D2+
D1+D4-
CTRCRS
TRVGAIN
SRVMON0
SRVMON1
TP
90TP
TP 38TP 36TP
37TP
TP
50TP
51TP
24
TP
19TP
16TP
14TP
18TP
4TP
3TP
2TP
1TP
87
TP
86
TP
10TP
11TP
31
TP
13
TP
9
TP
8
TP
7
TP
12
TP
17TP
89TP

Panasonic CD Stereo System Service Manual

Panasonic CD Stereo System Service Manual

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Panasonic CD Stereo System Service Manual