SA-VKX20GA, SA-VKX20GC, SA-VKX20GS - Panasonic Audio Service Manual (repair manual). Page 2

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5 Location of Controls and Components------------------ 15

5.1. Main Unit Key Button Operation---------------------- 15
5.2. Remote Control Key Button Operation ------------- 16
5.3. Disc Information ------------------------------------------ 17

6 Self-Diagnostic and Special Mode Setting ------------- 18

6.1. Cold-Start--------------------------------------------------- 18
6.2. Self-Diagnostic Mode Table --------------------------- 19
6.3. Self Diagnostic Function-Error Code ---------------- 26
6.4. Firmware Version-Up Information -------------------- 29
6.5. Sales Demonstration Lock Function ---------------- 32

7 Troubleshooting Guide---------------------------------------- 33

7.1. Troubleshooting Guide for F61 and/or F76 -------- 33
7.2. Part Location ---------------------------------------------- 34
7.3. D-Amp IC Operation & Control ----------------------- 37

8 Service Fixture & Tools --------------------------------------- 39

8.1. Service Tools and Equipment ------------------------- 39

9 Disassembly and Assembly Instructions --------------- 40

9.1. Disassembly Flow Chart-------------------------------- 41
9.2. Main Components and P.C.B. Locations ----------- 42
9.3. Disassembly of Side Panels--------------------------- 43
9.4. Disassembly of Top Cabinet Unit -------------------- 44
9.5. Disassembly of Deck Mechanism Unit ------------- 45
9.6. Disassembly of Deck P.C.B.--------------------------- 46
9.7. Disassembly of Cassette Lid -------------------------- 46
9.8. Disassembly of Front Panel Assembly ------------- 47
9.9. Disassembly of Panel P.C.B. -------------------------- 49

9.10. Disassembly of Remote Sensor P.C.B.------------- 50

9.11. Disassembly of CD Open Button P.C.B.------------ 51

9.12. Disassembly of USB P.C.B. --------------------------- 51
9.13. Disassembly of Mic P.C.B. ----------------------------- 52
9.14. Disassembly of CD Lid---------------------------------- 52
9.15. Disassembly of Main P.C.B. --------------------------- 53
9.16. Replacement of Regulator IC (IC4200)------------- 54
9.17. Disassembly of SMPS P.C.B. ------------------------- 55
9.18. Replacement of Switching Regulator IC

(IC5701) ---------------------------------------------------- 56

9.19. Replacement of Rectifier Diode (D5702)----------- 58
9.20. Replacement of Regulator Diode (D5801)--------- 60
9.21. Replacement of Regulator Diode (D5802)--------- 61
9.22. Replacement of Regulator Diode (D5803)--------- 62
9.23. Disassembly of DVD Module P.C.B.----------------- 63
9.24. Disassembly of DVD Mechanism Unit

(DLS6E) ---------------------------------------------------- 64

9.25. Disassembly of D-Amp P.C.B. ------------------------ 65
9.26. Replacement of Audio Digital Amp IC

(IC5900) ---------------------------------------------------- 67

9.27. Disassembly of Rear Panel---------------------------- 68
9.28. Disassembly of Voltage Selector P.C.B.------------ 69

10 Replacement of Traverse Unit ------------------------------ 71

10.1. Disassembly of Traverse Unit------------------------- 71
10.2. Assembly of Traverse Unit ----------------------------- 71

11 Service Position ------------------------------------------------- 73

11.1. Checking and Repairing of D-Amp P.C.B. --------- 73
11.2. Checking and Repairing of Panel P.C.B. ----------- 73
11.3. Checking and Repairing of Deck P.C.B.------------ 74
11.4. Checking and Repairing of SMPS P.C.B. ---------- 74
11.5. Checking and Repairing of DVD Module

P.C.B. Side A ---------------------------------------------- 76

11.6. Checking and Repairing of DVD Module

P.C.B. Side B ---------------------------------------------- 77

11.7. Checking and Repairing of Main P.C.B. Side A --- 77

11.8. Checking and Repairing Side B of Main P.C.B. -- 78

12 Measurements & Adjustments ----------------------------- 79

12.1. Deck Mechanism Section ----------------------------- 79

13 Voltage & Waveform Chart ---------------------------------- 80

13.1. Main P.C.B. (1/3)----------------------------------------- 80
13.2. Main P.C.B. (2/3)----------------------------------------- 81
13.3. Main P.C.B. (3/3)----------------------------------------- 82
13.4. DVD Module P.C.B. (1/3) ------------------------------ 83
13.5. DVD Module P.C.B. (2/3) ------------------------------ 84
13.6. DVD Module P.C.B. (3/3) ------------------------------ 85
13.7. Panel P.C.B.----------------------------------------------- 85
13.8. Mic P.C.B.-------------------------------------------------- 85
13.9. Deck P.C.B. ----------------------------------------------- 86

13.10. D-Amp P.C.B. --------------------------------------------- 86

13.11. SMPS P.C.B.---------------------------------------------- 87

13.12. Waveform Table (1/3) ----------------------------------- 88
13.13. Waveform Table (2/3) ----------------------------------- 89
13.14. Waveform Table (3/3) ----------------------------------- 90

14 Illustration of ICs, Transistor and Diode ---------------- 91
15 Simplified Block Diagram------------------------------------ 93

15.1. Overall Simplified Block Diagram-------------------- 93
15.2. D-Amp Block Diagram---------------------------------- 94

16 Block Diagram --------------------------------------------------- 95

16.1. DVD Module ---------------------------------------------- 95
16.2. IC Terminal Chart ---------------------------------------- 96
16.3. System Control ------------------------------------------- 97
16.4. Audio-------------------------------------------------------- 98
16.5. Power Amplifier & Video ------------------------------- 99
16.6. Power Supply -------------------------------------------- 100

17 Wiring Diagram------------------------------------------------- 102
18 Schematic Diagram ------------------------------------------- 103

18.1. Schematic Diagram Notes --------------------------- 103
18.2. DVD Module Circuit ------------------------------------ 105
18.3. Main Circuit----------------------------------------------- 109
18.4. Deck Circuit ---------------------------------------------- 117
18.5. Panel Circuit --------------------------------------------- 118
18.6. CD Open Button, Mic, USB & Remote Sensor

Circuit ------------------------------------------------------ 120

18.7. D-Amp Circuit-------------------------------------------- 121
18.8. SMPS Circuit--------------------------------------------- 122
18.9. Voltage Selector Circuit (For GA/GS Only)------- 124

19 Printed Circuit Board----------------------------------------- 125

19.1. DVD Module P.C.B. ------------------------------------ 125
19.2. Main P.C.B.----------------------------------------------- 126
19.3. Deck, CD Open Button, Mic, USB & Remote

Sensor P.C.B.-------------------------------------------- 127

19.4. Panel P.C.B.---------------------------------------------- 128
19.5. D-Amp & Voltage Selector P.C.B. ------------------ 129
19.6. SMPS P.C.B.--------------------------------------------- 130

20 Terminal Function of ICs ------------------------------------ 133

20.1. IC2800 (RFKWMVKX20GA): IC MICRO-

PROCESSOR ------------------------------------------- 133

20.2. IC6000(C0HBB0000061): IC FL Driver ----------- 133

21 Exploded View and Replacement Parts List---------- 135

21.1. Exploded View and Mechanical replacement

Part List --------------------------------------------------- 135

21.2. Electrical Replacement Part List -------------------- 141