Panasonic SA-PM42EG / SA-PM42EF / SA-PM42EP / SC-PM42EP Service Manual ▷ View online
PSG1002016CE
CD Stereo System
Model No.
SA-PM42EG
SA-PM42EF
SA-PM42EP
SA-PM42EF
SA-PM42EP
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 ------------------------- 4
1.3. Protection Circuitry ---------------------------------------- 4
1.4. Safety Part Information----------------------------------- 4
1.2. Before Repair and Adjustment ------------------------- 4
1.3. Protection Circuitry ---------------------------------------- 4
1.4. Safety Part Information----------------------------------- 4
2 Warning -------------------------------------------------------------- 5
2.1. Prevention of Electro Static Discharge (ESD)
to Electrostaticy Sensitive (ES) Devices---------- 5
2.2. Precaution of Laser Diode------------------------------- 6
2.3. Service caution based on Legal restrictions -------- 7
2.4. Handling Precaution for Traverse Unit --------------- 8
2.3. Service caution based on Legal restrictions -------- 7
2.4. Handling Precaution for Traverse Unit --------------- 8
3 Service Navigation --------------------------------------------- 10
3.1. Service Information -------------------------------------- 10
4 Specifications ---------------------------------------------------- 11
5 Location of Controls and Components------------------ 12
5 Location of Controls and Components------------------ 12
5.1. Main Unit Key Button Operations -------------------- 12
5.2. Remote Control Key Button Operations------------ 13
5.3. Media Information---------------------------------------- 14
5.2. Remote Control Key Button Operations------------ 13
5.3. Media Information---------------------------------------- 14
6 Self-diagnostic and special mode setting -------------- 15
6.1. Entering into Self-diagnostic Mode ------------------ 15
6.2. Self-diagnostic Function Error Code ---------------- 15
6.3. Entering into Doctor Mode ----------------------------- 16
6.2. Self-diagnostic Function Error Code ---------------- 15
6.3. Entering into Doctor Mode ----------------------------- 16
Notes: Please refer to the Original Service Manual for :
O CD Mechanism Unit (DLS6C), Order No. MD0803034CE
O Speaker system SB-PM48EG-K, Order No. PSG0902008CE
O CD Mechanism Unit (DLS6C), Order No. MD0803034CE
O Speaker system SB-PM48EG-K, Order No. PSG0902008CE
2
7 Troubleshooting Guide---------------------------------------- 20
8 Service Fixture & Tools --------------------------------------- 21
9 Disassembly and Assembly Instructions --------------- 22
8 Service Fixture & Tools --------------------------------------- 21
9 Disassembly and Assembly Instructions --------------- 22
9.1. Disassembly flow chart --------------------------------- 23
9.2. Main Parts Location Diagram ------------------------- 24
9.3. Disassembly of Top Cabinet Assembly ------------- 25
9.4. Disassembly of Headphone P.C.B. ------------------ 26
9.5. Disassembly of iPod P.C.B.---------------------------- 27
9.6. Disassembly of iPod Lid -------------------------------- 27
9.7. Disassembly of Front Panel Assembly ------------- 32
9.8. Disassembly of USB P.C.B. --------------------------- 33
9.9. Disassembly of Panel P.C.B. -------------------------- 34
9.2. Main Parts Location Diagram ------------------------- 24
9.3. Disassembly of Top Cabinet Assembly ------------- 25
9.4. Disassembly of Headphone P.C.B. ------------------ 26
9.5. Disassembly of iPod P.C.B.---------------------------- 27
9.6. Disassembly of iPod Lid -------------------------------- 27
9.7. Disassembly of Front Panel Assembly ------------- 32
9.8. Disassembly of USB P.C.B. --------------------------- 33
9.9. Disassembly of Panel P.C.B. -------------------------- 34
9.10. Disassembly of FL Window---------------------------- 35
9.11. Disassembly of Centre Ornament ------------------- 36
9.12. Disassembly of CD Lid---------------------------------- 36
9.13. Disassembly of CD Mechanism Unit (DLS6C) --- 38
9.14. Disassembly of Power P.C.B. ------------------------- 38
9.15. Replacement of Power Amp IC (IC5101) ---------- 40
9.16. Disassembly of Main P.C.B. --------------------------- 42
9.17. Disassembly of Fan Unit ------------------------------- 44
9.18. Disassembly of Transformer P.C.B. ----------------- 45
9.19. Replacement of Transistor (Q5901) ----------------- 46
9.20. Disassembly of CD Servo P.C.B.--------------------- 48
9.13. Disassembly of CD Mechanism Unit (DLS6C) --- 38
9.14. Disassembly of Power P.C.B. ------------------------- 38
9.15. Replacement of Power Amp IC (IC5101) ---------- 40
9.16. Disassembly of Main P.C.B. --------------------------- 42
9.17. Disassembly of Fan Unit ------------------------------- 44
9.18. Disassembly of Transformer P.C.B. ----------------- 45
9.19. Replacement of Transistor (Q5901) ----------------- 46
9.20. Disassembly of CD Servo P.C.B.--------------------- 48
10 Disassembly and Assembly of Traverse Unit --------- 50
10.1. Disassembling Procedures ---------------------------- 50
10.2. Assembling Procedure---------------------------------- 51
10.2. Assembling Procedure---------------------------------- 51
11 Service Position ------------------------------------------------- 53
11.1. Checking & Repairing USB P.C.B.------------------- 53
11.2. Checking & Repairing Panel P.C.B. ----------------- 55
11.3. Checking & Repairing CD Servo P.C.B. ------------ 56
11.4. Checking & Repairing Power P.C.B. ---------------- 57
11.5. Checking & Repairing Transformer P.C.B.--------- 58
11.6. Checking & Repairing Main P.C.B. ------------------ 60
11.2. Checking & Repairing Panel P.C.B. ----------------- 55
11.3. Checking & Repairing CD Servo P.C.B. ------------ 56
11.4. Checking & Repairing Power P.C.B. ---------------- 57
11.5. Checking & Repairing Transformer P.C.B.--------- 58
11.6. Checking & Repairing Main P.C.B. ------------------ 60
12 Voltage Measurement & Waveform Chart--------------- 61
12.1. CD SERVO P.C.B. --------------------------------------- 61
12.2. USB P.C.B.------------------------------------------------- 62
12.3. MAIN P.C.B. (1/2) ---------------------------------------- 63
12.4. MAIN P.C.B. (2/2) ---------------------------------------- 64
12.5. PANEL P.C.B. --------------------------------------------- 64
12.6. POWER P.C.B. ------------------------------------------- 64
12.7. TRANSFORMER P.C.B.-------------------------------- 65
12.8. Waveform Chart ------------------------------------------ 66
12.2. USB P.C.B.------------------------------------------------- 62
12.3. MAIN P.C.B. (1/2) ---------------------------------------- 63
12.4. MAIN P.C.B. (2/2) ---------------------------------------- 64
12.5. PANEL P.C.B. --------------------------------------------- 64
12.6. POWER P.C.B. ------------------------------------------- 64
12.7. TRANSFORMER P.C.B.-------------------------------- 65
12.8. Waveform Chart ------------------------------------------ 66
13 Illustration of IC’s, Transistors and Diodes ------------ 67
14 Overall Simplified Block -------------------------------------- 69
15 Block Diagram --------------------------------------------------- 70
14 Overall Simplified Block -------------------------------------- 69
15 Block Diagram --------------------------------------------------- 70
15.1. SERVO/SYSTEM CONTROL BLOCK
DIAGRAM -------------------------------------------------- 70
15.2. AUDIO BLOCK DIAGRAM ---------------------------- 71
15.3. POWER SUPPLY BLOCK DIAGRAM -------------- 72
15.3. POWER SUPPLY BLOCK DIAGRAM -------------- 72
16 Wiring Connection Diagram --------------------------------- 73
17 Schematic Diagram Notes ----------------------------------- 75
18 Schematic Diagram--------------------------------------------- 77
17 Schematic Diagram Notes ----------------------------------- 75
18 Schematic Diagram--------------------------------------------- 77
18.1. CD SERVO CIRCUIT ----------------------------------- 77
18.2. MAIN CIRCUIT (1/4) ------------------------------------ 78
18.3. MAIN CIRCUIT (2/4) ------------------------------------ 79
18.4. MAIN CIRCUIT (3/4) ------------------------------------ 80
18.5. MAIN CIRCUIT (4/4) ------------------------------------ 81
18.6. PANEL CIRCUIT and HEADPHONE CIRCUIT--- 82
18.7. USB CIRCUIT--------------------------------------------- 83
18.8. iPod CIRCUIT and POWER CIRCUIT -------------- 84
18.9. TRANSFORMER CIRCUIT---------------------------- 85
18.2. MAIN CIRCUIT (1/4) ------------------------------------ 78
18.3. MAIN CIRCUIT (2/4) ------------------------------------ 79
18.4. MAIN CIRCUIT (3/4) ------------------------------------ 80
18.5. MAIN CIRCUIT (4/4) ------------------------------------ 81
18.6. PANEL CIRCUIT and HEADPHONE CIRCUIT--- 82
18.7. USB CIRCUIT--------------------------------------------- 83
18.8. iPod CIRCUIT and POWER CIRCUIT -------------- 84
18.9. TRANSFORMER CIRCUIT---------------------------- 85
19 Printed Circuit Board------------------------------------------ 87
19.1. CD SERVO P.C.B. and TRANSFORMER
P.C.B. ------------------------------------------------------- 87
19.2. MAIN P.C.B.----------------------------------------------- 88
19.3. PANEL P.C.B., HEADPHONE P.C.B. and
19.3. PANEL P.C.B., HEADPHONE P.C.B. and
POWER P.C.B. ------------------------------------------- 89
19.4. iPod P.C.B. and USB P.C.B. -------------------------- 90
20 Terminal Function of IC’s ------------------------------------ 91
20.1. IC7001 (MN6627954AMA) IC SERVO
PROCESSOR -------------------------------------------- 91
20.2. IC7002 (BA5948FPE2) IC 4CH Drive -------------- 92
20.3. IC800 (RFKWMPM38EG) IC MICRO-
20.3. IC800 (RFKWMPM38EG) IC MICRO-
PROCESSOR -------------------------------------------- 92
21 Exploded View and Replacement Parts List----------- 95
21.1. Exploded View and Mechanical replacement
Parts List --------------------------------------------------- 95
21.2. Electrical Replacement Parts List ------------------- 99
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
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
chassis, the reading should be between 1M
Ω and 5.2MΩ. When the exposed metal does not have a return path to the chas-
sis, 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
2. Connect a 1.5k
Ω, 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)
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.
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
4
1.2.
Before Repair and Adjustment
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.
After repairs are completed, restore power gradually using a variac, to avoid overcurrent.
• Current consumption at AC 220-240V, at 50Hz in NO SIGNAL mode (at volume min in FM Tuner mode) should be ~150 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.
• 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:
"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.
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.
When the protection circuitry functions, the unit will not operate unless the power is first turned off and then on again.
1.4.
Safety Part 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, Exploded View & 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.
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.
Table 1
Safety
Ref. No.
Part No.
Part Name & Description
Remarks
L5901
ELF15N035AN
LINE FILTER
T5901
G4CYBYY00022
TRANSFORMER
T5902
G4C2AAJ00005
BACK UP TRANSFORMER
Z5901
ERZVA5Z471
ZENER
RL5901
K6B1AEA00003
POWER RELAY
F5901
K5D102BLA013
FUSE
FP5901
K5G502AA0002
FUSE PROTECTOR
JK5901
K2AA2B000011
AC INLET
R260
ERD2FCVG470T
47 1/4W
R5905
ERD2FCVG120T
12 1/4W
PCB2
REPX0849HA
TRANSFORMER P.C.B.
(RTL)
401
RAEX0190Z-V
TRAVERSE UNIT
22
RFKHAPM42EGK
REAR CABINET ASS’Y
EG
22
RFKHAPM42EPK
REAR CABINET ASS’Y
EP
22
RFKHAPM42EFK
REAR CABINET ASS’Y
EF
A2
K2CQ2CA00007
AC CORD
A3
RQTX0186-2D
O/I BOOK (Ge/It/Fr/Sp)
EF
A3
RQTX0187-2H
O/I BOOK (Du/Da/Sw)
EG
A3
RQTX0188-2E
O/I BOOK (Po/Cz/Ar)
EP
A3
RQTX0189-2R
O/I BOOK (Ru/Ur)
EP
A3
RQTX0191-2B
O/I BOOK (En)
EP
