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PSG0905023CE

CD Stereo System
Model No. SA-AK180PN
SA-AK180PU
Product Color: (K)...Black Type

Notes: This model's CD Mechanism Unit is CR14C. Please refer to the original service manual
(Order No. MD0805031CE) for this mechanism

TABLE OF CONTENTS
PAGE PAGE
1 Safety Precautions----------------------------------------------- 3 2.1. Prevention of Electrostatic Discharge (ESD)
1.1. General Guidelines---------------------------------------- 3 to Electrostatic Sensitive (ES) Devices---------------6
1.2. Before Use (For PU only)-------------------------------- 3 2.2. Precaution of Laser Diode -------------------------------7
1.3. Before Repair and Adjustment ------------------------- 3 2.3. Service caution based on Legal restrictions --------8
1.4. Protection Circuitry ---------------------------------------- 4 2.4. Handling Precautions for Traverse Unit --------------9
1.5. Safety Parts Information --------------------------------- 4 3 Service Navigation --------------------------------------------- 11
2 Warning -------------------------------------------------------------- 6 3.1. Service Information -------------------------------------- 11
4 Specifications ---------------------------------------------------- 12
5 Location of Controls and Components------------------ 13 11.7. SMPS P.C.B.---------------------------------------------- 61
5.1. Main Unit Key Button Operation---------------------- 13 11.8. Waveform Table (1/2)----------------------------------- 62
5.2. Remote Control Key Button Operation ------------- 14 11.9. Waveform Table (2/2)----------------------------------- 63
5.3. Disc Information ------------------------------------------ 15 12 Illustration of ICs, Transistor and Diode ---------------- 64
6 Self-Diagnosis and Special Mode Setting -------------- 16 13 Block Diagram --------------------------------------------------- 65
6.1. Doctor Mode Summary Table ------------------------- 16 13.1. CD Servo -------------------------------------------------- 65
6.2. Doctor Mode Table--------------------------------------- 16 13.2. Main (1/2) -------------------------------------------------- 66
6.3. Doctor Mode Summary Table [CD Mechanism 13.3. Main (2/2) -------------------------------------------------- 67
Unit (CR14C)] --------------------------------------------- 18 13.4. D-Amp ------------------------------------------------------ 68
6.4. Service Mode Table [CD Mechanism Unit 13.5. Power ------------------------------------------------------- 69
(CR14C)] --------------------------------------------------- 19 14 Wiring Connection Diagram -------------------------------- 70
6.5. Reliability Test Mode (CD Mechanism Unit 15 Schematic Diagram Notes ----------------------------------- 71
CR14C) ----------------------------------------------------- 20 16 Schematic Diagram -------------------------------------------- 73
6.6. Error Code Table ----------------------------------------- 23 16.1. CD Servo Circuit ----------------------------------------- 73
7 Troubleshooting Guide---------------------------------------- 25 16.2. Main Circuit------------------------------------------------ 74
7.1. Troubleshooting Guide for F61 and/or F76 -------- 25 16.3. Panel Circuit ---------------------------------------------- 78
8 Service Fixture & Tools --------------------------------------- 30 16.4. USB Circuit ------------------------------------------------ 79
8.1. Service Tools and Equipment ------------------------- 30 16.5. D-Amp Circuit--------------------------------------------- 80
9 Disassembly and Assembly Instructions --------------- 31 16.6. SMPS Circuit---------------------------------------------- 81
9.1. Disassembly Flow Chart-------------------------------- 32 16.7. MPORT/Headphone, AC Inlet Circuit &
9.2. Main Components and P.C.B. Locations ----------- 33 Voltage Selector (For PU only) Circuit-------------- 83
9.3. Disassembly of Top Cabinet--------------------------- 34 17 Printed Circuit Board------------------------------------------ 84
9.4. Disassembly of CD Mechanism Unit (CR14C) --- 34 17.1. CD Servo & MPORT/Headphone P.C.B. ---------- 84
9.5. Disassembly of Rear Panel---------------------------- 36 17.2. Main P.C.B.------------------------------------------------ 85
9.6. Disassembly of Front Panel Assembly ------------- 37 17.3. Panel P.C.B.----------------------------------------------- 86
9.7. Disassembly of Panel P.C.B. -------------------------- 38 17.4. USB, AC Inlet P.C.B. & Voltage Selector (For
9.8. Disassembly of Dynamic Bass Knob & PU only) P.C.B.------------------------------------------- 87
Dynamic Bass Button Unit ----------------------------- 39 17.5. D-Amp P.C.B. --------------------------------------------- 88
9.9. Disassembly of CD Lid---------------------------------- 41 17.6. SMPS P.C.B.---------------------------------------------- 89
9.10. Disassembly of CD Servo P.C.B.--------------------- 41 18 Terminal Function of ICs ------------------------------------- 91
9.11. Disassembly of D-Amp P.C.B. ------------------------ 42 18.1. IC2801 (RFKWMAK180PN): IC MICRO-
9.12. Replacement of Audio Digital Power Amp IC PROCESSOR -------------------------------------------- 91
(IC5000) ---------------------------------------------------- 43 18.2. IC6901(C0HBB0000057): IC FL Driver ------------ 91
9.13. Disassembly of Main P.C.B. --------------------------- 44 19 Exploded View and Replacement Parts List----------- 93
9.14. Disassembly of SMPS P.C.B. ------------------------- 45 19.1. Exploded View and Mechanical Replacement
9.15. Replacement of Switching Regulator IC Part List ---------------------------------------------------- 93
(IC5701) ---------------------------------------------------- 45 19.2. Electrical Replacement Part List --------------------- 99
9.16. Replacement of Rectifier Diode (D5702)----------- 46 20 Schematic Diagram for printing with letter size----- 107
9.17. Replacement of Regulator Diode (D5801)--------- 48
9.18. Replacement of Regulator Diode (D5802)--------- 48
9.19. Replacement of Regulator Diode (D5803)--------- 49
9.20. Disassembly of AC Inlet P.C.B. ----------------------- 50
9.21. Disassembly of USB P.C.B. --------------------------- 51
9.22. Disassembly of MPort/Headphone P.C.B. --------- 52
9.23. Disassembly of Voltage Selector P.C.B. (For
PU only) ---------------------------------------------------- 52
9.24. Replacement of Traverse Unit Assembly ---------- 53
10 Service Position ------------------------------------------------- 55
10.1. Checking and Repairing of Main P.C.B. ------------ 55
10.2. Checking and Repairing of Panel P.C.B., USB
P.C.B. & MPORT/Headphone P.C.B.---------------- 55
10.3. Checking and Repairing of D-Amp P.C.B. --------- 55
10.4. Checking and Repairing of SMPS and AC
Inlet P.C.B. ------------------------------------------------- 56
11 Voltage & Waveform Chart ----------------------------------- 57
11.1. CD Servo P.C.B.------------------------------------------ 57
11.2. Main P.C.B. (1/2) ----------------------------------------- 58
11.3. Main P.C.B. (2/2) ----------------------------------------- 59
11.4. Panel P.C.B. ----------------------------------------------- 59
11.5. USB P.C.B.------------------------------------------------- 60
11.6. D-Amp P.C.B. --------------------------------------------- 60

2
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 1M and 5.2M.
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 1.5k, 10 watts resistor, in parallel with a 0.15