SC-HC55EG - Panasonic Audio Service Manual (repair manual)

sc-hc55eg service manual
Model
SC-HC55EG
Pages
127
Size
15.33 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio / COMPACT STEREO SYSTEM
File
sc-hc55eg.pdf
Date

Read Panasonic SC-HC55EG Service Manual online

PSG1103032CE
Compact Stereo System
Model No.
SC-HC55EG
Product Color:   (K)...Black Type
(W)...White Type
TABLE OF CONTENTS
PAGE
PAGE
1 Safety Precautions----------------------------------------------- 3
1.1. General Guidelines---------------------------------------- 3
1.2. Before Repair and Adjustment ------------------------- 4
1.3. Caution For Fuse Replacement------------------------ 4
1.4. Protection Circuitry ---------------------------------------- 4
1.5. 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 Deck-------------- 8
3 Service Navigation ----------------------------------------------- 9
3.1. Service Information --------------------------------------- 9
4 Specifications ---------------------------------------------------- 10
5 Location of Controls and Components------------------ 11
5.1. Main Unit & Remote Control Key Button
Operations ------------------------------------------------- 11
5.2. Connections ----------------------------------------------- 12
5.3. Disc operations ------------------------------------------- 13
5.4. iPod or iPhone Operation ------------------------------ 15
5.5. Bluetooth Operation ------------------------------------- 16
5.6. USB Operation-------------------------------------------- 17
6 Self Diagnostic and Doctor Mode Setting -------------- 18
6.1. Self Diagnostic Mode ----------------------------------- 18
6.2. Self Diagnostic Function Error Code ---------------- 19
6.3. Doctor Mode Table--------------------------------------- 20
6.4. Sales Demonstration Lock Function Mode -------- 28
2
7 Service Fixture & Tools --------------------------------------- 29
8 Disassembly and Assembly Instructions --------------- 30
8.1. Disassembly flow chart --------------------------------- 31
8.2. Types of Screws ------------------------------------------ 32
8.3. Main Parts Location Diagram ------------------------- 32
8.4. Disassembly of Stand Assembly --------------------- 33
8.5. Replacement of Door Assembly---------------------- 33
8.6. Replacement of Cam Gear ---------------------------- 35
8.7. Disassembly of Lens Cover --------------------------- 37
8.8. Disassembly of Net Frame Assembly--------------- 38
8.9. Disassembly of Front Panel Block ------------------- 40
8.10. Disassembly of Gear Box Assembly ---------------- 42
8.11. Disassembly of Remote Sensor P.C.B. & iPod
Open Switch P.C.B.-------------------------------------- 46
8.12. Disassembly of Interlock Switch P.C.B.------------- 47
8.13. Replacement of iPod Tub Assembly ---------------- 48
8.14. Disassembly of Mini Side Lock ----------------------- 51
8.15. Disassembly of iPhone P.C.B. ------------------------ 51
8.16. Disassembly of Top Guide Reel ---------------------- 53
8.17. Disassembly of Bottom Guide Reel ----------------- 54
8.18. Disassembly of Top Ornament Assembly ---------- 56
8.19. Disassembly of Button P.C.B. ------------------------- 57
8.20. Disassembly of Top Button & Power Light
Piece -------------------------------------------------------- 58
8.21. Disassembly of Bluetooth P.C.B. --------------------- 59
8.22. Disassembly of Panel P.C.B. -------------------------- 60
8.23. Disassembly of Jack Lid-------------------------------- 61
8.24. Disassembly of Tuner P.C.B. -------------------------- 62
8.25. Disassembly of CD Mechanism ---------------------- 63
8.26. Disassembly of CD Servo P.C.B.--------------------- 65
8.27. Disassembly of SMPS P.C.B. ------------------------- 66
8.28. Replacement of Diode (D702) ------------------------ 69
8.29. Replacement of Transistor (Q701)------------------- 70
8.30. Disassembly of Passive Radiator (SP6) ----------- 72
8.31. Disassembly of Passive Radiator (SP5) ----------- 72
8.32. Disassembly of Front Speaker (SP2) --------------- 73
8.33. Disassembly of Front Speaker (SP1) --------------- 75
8.34. Disassembly of Piezo Unit (SP8) -------------------- 76
8.35. Disassembly of Piezo Unit (SP7) -------------------- 77
8.36. Disassembly of Passive Radiator (SP4) ----------- 78
8.37. Disass embly of Passive Radiator (SP3)----------- 79
8.38. Disassembly of Main P.C.B. --------------------------- 79
9 Service Position ------------------------------------------------- 82
9.1. Checking & Repairing of Panel P.C.B. -------------- 82
9.2. Checking & Repairing of CD Servo P.C.B.--------- 83
9.3. Checking & Repairing of Main (Side B) P.C.B. --- 85
9.4. Checking & Repairing of Main (Side A) P.C.B. --- 89
9.5. Checking & Repairing of SMPS P.C.B. ------------- 92
10 Voltage Measurement & Waveform Chart--------------- 96
10.1. CD SERVO P.C.B. --------------------------------------- 96
10.2. MAIN P.C.B. (1/3) ---------------------------------------- 97
10.3. MAIN P.C.B. (2/3) ---------------------------------------- 98
10.4. MAIN P.C.B. (3/3) ---------------------------------------- 99
10.5. PANEL P.C.B. ------------------------------------------- 100
10.6. SMPS P.C.B. -------------------------------------------- 100
10.7. TUNER P.C.B. ------------------------------------------ 100
10.8. BUTTON P.C.B. ---------------------------------------- 100
10.9. REMOTE SENSOR P.C.B. -------------------------- 101
10.10. Waveform Chart ---------------------------------------- 101
11 Illustration of IC’s, Transistors and Diodes ---------- 102
12 Overall Simplified Block ------------------------------------ 103
12.1. Voltage / Current / Ground Diagram --------------- 103
12.2. Control & Signal Diagram ---------------------------- 104
13 Block Diagram -------------------------------------------------- 105
13.1. SERVO & SYSTEM CONTROL (1/2) BLOCK
DIAGRAM ------------------------------------------------ 105
13.2. SERVO & SYSTEM CONTROL (2/2) BLOCK
DIAGRAM ------------------------------------------------ 106
13.3. IC TERMINAL CHART -------------------------------- 107
13.4. BLUETOOTH BLOCK DIAGRAM ------------------ 108
13.5. AUDIO BLOCK DIAGRAM --------------------------- 109
13.6. POWER SUPPLY (1/2) BLOCK DIAGRAM------ 110
13.7. POWER SUPPLY (2/2) BLOCK DIAGRAM------ 111
14 Wiring Connection Diagram ------------------------------- 112
15 Schematic Diagram ------------------------------------------- 113
15.1. Schematic Diagram Notes --------------------------- 113
15.2. CD SERVO CIRCUIT (1/2)--------------------------- 115
15.3. CD SERVO CIRCUIT (2/2)--------------------------- 116
15.4. MAIN CIRCUIT (1/4) ----------------------------------- 117
15.5. MAIN CIRCUIT (2/4) ----------------------------------- 118
15.6. MAIN CIRCUIT (3/4) ----------------------------------- 119
15.7. MAIN CIRCUIT (4/4) ----------------------------------- 120
15.8. MAIN (BLUETOOTH) CIRCUIT--------------------- 121
15.9. MAIN (SOUND) CIRCUIT ---------------------------- 122
15.10. MAIN (USB/iPod) CIRCUIT -------------------------- 123
15.11. iPhone, TUNER & MOTOR CIRCUIT ------------- 124
15.12. REMOTE SENSOR & iPod OPEN SWITCH
CIRCUIT -------------------------------------------------- 125
15.13. PANEL, INTERLOCK SWITCH & BUTTON
CIRCUIT -------------------------------------------------- 126
15.14. SMPS CIRCUIT ----------------------------------------- 127
16 Printed Circuit Board----------------------------------------- 128
16.1. CD SERVO P.C.B.-------------------------------------- 128
16.2. MAIN P.C.B. (Side A) ---------------------------------- 129
16.3. MAIN P.C.B. (Side B) ---------------------------------- 130
16.4. iPhone, TUNER, iPod OPEN SWITCH,
MOTOR & REMOTE SENSOR P.C.B. ------------ 131
16.5. PANEL, INTERLOCK SWITCH & BUTTON
P.C.B. ------------------------------------------------------ 132
16.6. SMPS P.C.B.--------------------------------------------- 133
17 Terminal Function of IC’s ----------------------------------- 135
17.1. IC801 (RFKWMHC55M0) MICRO
PROCESSOR IC --------------------------------------- 135
18 Exploded View and Replacement Parts List---------- 137
18.1. Exploded View and Mechanical replacement
Parts List -------------------------------------------------- 137
18.2. Electrical Replacement Parts List ------------------ 143
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
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
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)
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
4
1.2.
Before Repair and Adjustment
Disconnect AC power, discharge unit AC Capacitors as such C702, C710, C725, C727 and C728 through a 10W, 1W 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 - 240V, at 50Hz in NO SIGNAL mode (at volume min in FM Tuner mode) should be ~200 mA.
1.3.
Caution For Fuse Replacement
1.4.
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.
1.5.
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.
Table 1
Safety
Ref. No.
Part No.
Part Name & Description
Remarks
28
RGPX1050J-K1
REAR PANEL
300
RAEX1034Z-V
TRAVERSE
A2
K2CQ2CA00007
AC CORD
A3
RQTX1263-D
O/I BOOK (Ge/It/Sp/Du/Da/Sw)
A3
RQTX1264-H
O/I BOOK (Fr)
A3
RQTX1265-R
O/I BOOK (En/Po/Cz/Ru/Ur)
C702
F0CAF104A105
0.1uF
C710
F1BAF2220023
2200pF
C725
F0CAF104A105
0.1uF
C727
F1BAF1020020
1000pF
C728
F1BAF1020020
1000pF
F751
K5G312Y00007
FUSE PROTECTOR
FP1000
K5H7512A0010
PROTECTOR
L702
G0B183E00004
LINE FILTER
L703
G0B111H00003
LINE FILTER
P751
K2AA2B000011
AC INLET
PC701
B3PBA0000503
PHOTO COUPLER
PC702
B3PBA0000503
PHOTO COUPLER
PCB10
REPX0917A
SMPS P.C.B.
(RTL)
PCB12
REPX4229D
BLUETOOTH MODULE
SW1
D4FB1R250006
RESETTABLE FUSE
SW7900
D4FBR5000009
RESETTABLE FUSE
T1000
G4D1A0000117
SWITCHING TRANSFORMER
T701
ETS28BT11GAC
SWITCHING TRANSFORMER
Z752
ERZVA5Z471
ZNR
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