SA-VKX20GA, SA-VKX20GC, SA-VKX20GS — Panasonic Audio Service Manual (repair manual)

Model
SA-VKX20GA SA-VKX20GC SA-VKX20GS
Pages
127
Size
12.33 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio / DVD STEREO SYSTEM
File
sa-vkx20ga-sa-vkx20gc-sa-vkx20gs.pdf
Date

View Panasonic SA-VKX20GA / SA-VKX20GC / SA-VKX20GS Service Manual online

PSG1010001CE
DVD Stereo System
Model No.
SA-VKX20GA
SA-VKX20GC
SA-VKX20GS
Product Color:  (K)...Black Type
TABLE OF CONTENTS
PAGE
PAGE
1 Safety Precautions----------------------------------------------- 3
1.1. General Guidelines---------------------------------------- 3
1.2. Before Use (For GA/GS only) -------------------------- 3
1.3. Caution For Fuse Replacement------------------------ 3
1.4. Before Repair and Adjustment ------------------------- 4
1.5. Protection Circuitry ---------------------------------------- 4
1.6. Safety Parts Information --------------------------------- 4
1.7. Caution for AC Cord (For GS Only)------------------- 6
2 Warning -------------------------------------------------------------- 7
2.1. Prevention of Electrostatic Discharge (ESD)
to Electrostatic Sensitive (ES) Devices--------------- 7
2.2. Precaution of Laser Diode ------------------------------- 8
2.3. Service caution based on Legal restrictions -------- 9
2.4. Handling Precautions for Traverse Unit ------------ 10
3 Service Navigation --------------------------------------------- 12
3.1. Service Information -------------------------------------- 12
4 Specifications ---------------------------------------------------- 13
4.1. Others (Licenses) ---------------------------------------- 14
Notes: Please refer to the original service manual for: 
O
 
CD Mechanism Unit (DLS6E), Order No: PSG0909002AE
O
 Speaker System SB-AKX10PN-K, Order No: PSG1001001CE
2
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
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 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
µ
F 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 Use (For GA/GS only)
Be sure to disconnect the mains cord before adjusting the voltage selector.
Use a minus(-) screwdriver to set the voltage selector (on the rear panel) to the voltage setting for the area in which the unit will be
used. (If the power supply in your area is 110V ~ 127V or 220V ~ 240V, set to the “110V ~ 127V or 220V ~ 240V” position.)
Note that  this unit will be seriously damaged if this setting is not made correctly. (There is no voltage selector for some countries,
the correct voltage is already set.)
1.3.
Caution For Fuse Replacement
4
1.4.
Before Repair and Adjustment
Disconnect AC power to discharge unit AC Capacitors as such (C5701, C5703, C5704, C5705, C5706, C5707, C5708) through a
10 
, 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 220~240 V, 50/60 Hz in Power ON, FM Tuner, No Signal, Volume minimal mode should be ~ 500 mA.
Current consumption at AC 110~127 V, 50/60 Hz in Power ON, FM Tuner, No Signal, Volume minimal mode should be ~ 750 mA
(GA/GS).
1.5.
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.
Note:
When the protection circuitry functions, the unit will not operate unless the power is first turned off and then on again.
1.6.
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
6
REXX1030
1P BLK WIRE (VOLTAGE-SMPS) GA/GS
7
REXX1031
1P RED WIRE (VOLTAGE-SMPS) GA/GS
17
RGRX1003A-A1
REAR PANEL
GC
17
RGRX1003B-A1
REAR PANEL
GS
17
RGRX1003B-B1
REAR PANEL
GA
39
RKMX1007-K
SIDE PANEL L
40
RKMX1008-K
SIDE PANEL R
58
RMQX1087
DECK COVER SHEET
401
RAEX1032Z-V
TRAVERSE UNIT
A2
K2CP2CA00001
AC CORD
GA
A2
K2CQ2CA00007
AC CORD
GA/GC
A2
K2CZ3YY00005
AC CORD
GS
A3
RQTX1227-G
O/I BOOK (En/Pe/Ar)
GC/GS
A3
RQTX1228-L
O/I BOOK (En)
GA
PCB10
REPX0809L
SMPS P.C.B.
(RTL) GC
PCB10
REPX0809M
SMPS P.C.B.
(RTL) GA/GS
PCB11
REPX0809M
VOLTAGE SELECTOR P.C.B.
(RTL) GA/GS
DZ5701
ERZV10V511CS
ZNR
S5701
K0ABCA000007
SW VOLT ADJ
GA/GS
L5702
ELF22V020A
LINE FILTER
GC
L5703
G0B612H00002
LINE FILTER
T4300
G4DYA0000214
SWITCHING TRANSFORMER
T5701
ETS39AG4M6AD
MAIN TRANSFORMER
T5751
ETS19AB2E6AG
SUB TRANSFORMER
F1
K5D402BK0007
FUSE
GC
F1
K5D632BK0007
FUSE
GA/GS
TH5702
D4CAA2R20001
THERMISTOR
TH5860
D4CC11040013
THERMISTOR
TH5900
D4CC11040013
THERMISTOR
P5701
K2AA2B000011
AC INLET
C5700
F1BAF471A013
470pF
GC
C5701
F0CAF104A105
0.1uF
C5703
F0CAF224A105
0.22uF
Page of 127

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Here you can view online or download Panasonic SA-VKX20GA / SA-VKX20GC / SA-VKX20GS Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Panasonic SA-VKX20GA / SA-VKX20GC / SA-VKX20GS Audio. Information contained in Panasonic SA-VKX20GA / SA-VKX20GC / SA-VKX20GS service manual (repair manual) typically includes:

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  • Parts list (bill of materials).