SC-HC4EP - Panasonic Audio Service Manual (repair manual)

sc-hc4ep service manual
Model
SC-HC4EP
Pages
127
Size
18.06 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio / COMPACT STEREO SYSTEM
File
sc-hc4ep.pdf
Date

Read Panasonic SC-HC4EP Service Manual online

PSG0904017CE
Compact Stereo System
Model No.
SC-HC4EP
Product Color: (S)...Silver 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 -------------------------------------------------------------- 6
2.1. Prevention of Electro Static Discharge (ESD)
to Electrostaticy Sensitive (ES) Devices---------- 6
2.2. Precaution of Laser Diode------------------------------- 7
2.3. Service caution based on Legal restrictions -------- 8
3 Service Navigation ----------------------------------------------- 9
3.1. Service Information --------------------------------------- 9
4 Specifications ----------------------------------------------------10
5 Location of Controls and Components ------------------11
5.1. Main Unit Key Button Operations---------------------11
5.2. Remote Control Key Button Operations ------------12
6 Operating Instructions-----------------------------------------13
6.1. Disc and MP3 Information ----------------------------- 13
7 Self diagnosis and special mode setting --------------- 14
7.1. Service Mode Summary Table------------------------ 14
7.2. Service Mode Table ------------------------------------- 15
7.3. Error Code Table ----------------------------------------- 18
8 Troubleshooting Guide --------------------------------------- 19
8.1.  CD Door Unit Jam--------------------------------------- 19
9 Disassembly and Assembly Instructions--------------- 21
9.1. Disassembly flow chart --------------------------------- 22
9.2. Type of Screw--------------------------------------------- 23
9.3. Main Parts Location Diagram ------------------------- 23
9.4. Disassembly of CD Door Unit------------------------- 24
9.5. Disassembly of Net Frame Assembly--------------- 26
9.6. Disassembly of Top Ornament------------------------ 28
9.7. Disassembly of Bottom Ornament------------------- 29
9.8. Disassembly of Speaker Unit (SP1)----------------- 30
9.9. Disassembly of Speaker Unit (SP2)----------------- 31
9.10. Disassembly of Panel 1 & Panel 2 P.C.B. --------- 33
2
9.11. Disassembly of Front Panel Block ------------------- 35
9.12. Disassembly of Tuner Pack --------------------------- 35
9.13. Disassembly of SMPS Unit ---------------------------- 36
9.14. Disassembly of AC IN P.C.B.-------------------------- 37
9.15. Disassembly of SMPS P.C.B. ------------------------- 39
9.16. Replacement of Switching Regulator IC
(IC702) ------------------------------------------------------ 40
9.17. Replacement of Diode (D702) ------------------------ 42
9.18. Replacement of Diode (D704) ------------------------ 44
9.19. Disassembly of Main P.C.B. --------------------------- 46
9.20. Disassembly of Fan-------------------------------------- 49
9.21. Disassembly of AUX / HP P.C.B.--------------------- 49
9.22. Disassembly of Traverse Deck ----------------------- 50
9.23. Disassembly of Traverse Cover & Traverse
Unit----------------------------------------------------------- 51
9.24. Disassembly of CD Servo P.C.B.--------------------- 52
9.25. Disassembly of D-Amp P.C.B. ------------------------ 53
9.26. Disassembly of Fan Unit (iPod) ---------------------- 53
9.27. Disassembly of USB Module Assembly ------------ 55
9.28. Disassembly of USB P.C.B. --------------------------- 55
9.29. Disassembly of SD Lid---------------------------------- 56
9.30. Disassembly of FL P.C.B. ------------------------------ 57
9.31. Disassembly of iPod P.C.B.---------------------------- 58
9.32. Disassembly of Motor P.C.B. -------------------------- 61
9.33. Disassembly of Position SW P.C.B. ----------------- 62
9.34. Disassembly of iPod SW P.C.B. ---------------------- 63
9.35. Disassembly of IR P.C.B.------------------------------- 64
10 Service Position ------------------------------------------------- 66
10.1. Checking and Repairing Main P.C.B. --------------- 66
10.2. Checking and Repairing D-Amp P.C.B.------------- 73
10.3. Checking and Repairing FL P.C.B. ------------------ 74
10.4. Checking and Repairing CD Servo P.C.B. --------- 74
10.5. Checking and Repairing USB P.C.B.---------------- 75
10.6. Checking and Repairing AC IN P.C.B. -------------- 75
10.7. Checking and Repairing SMPS P.C.B. ------------- 78
11 Voltage Measurement & Waveform Chart--------------- 80
11.1. CD SERVO P.C.B. --------------------------------------- 80
11.2. D-AMP P.C.B. --------------------------------------------- 81
11.3. FL P.C.B. --------------------------------------------------- 81
11.4. MAIN P.C.B. (1/3) ---------------------------------------- 82
11.5. MAIN P.C.B. (2/3) ---------------------------------------- 83
11.6. MAIN P.C.B. (3/3) ---------------------------------------- 84
11.7. SMPS P.C.B. ---------------------------------------------- 84
11.8. USB P.C.B.------------------------------------------------- 85
11.9. Waveform Chart ------------------------------------------ 86
12 Illustration of IC’s, Transistors and Diodes ------------ 88
13 Overall Simplified Block -------------------------------------- 89
14 Block Diagram --------------------------------------------------- 92
14.1. CD SERVO BLOCK DIAGRAM ---------------------- 92
14.2. MAIN (1/2) / TUNER / iPod / FL / MOTOR /
USB BLOCK DIAGRAM-------------------------------- 93
14.3. MAIN (2/2) / D-AMP BLOCK DIAGRAM ----------- 94
14.4. PANEL1/2 / AUX/HP / IR / SMPS / AC IN
BLOCK DIAGRAM--------------------------------------- 95
15 Wiring Connection Diagram --------------------------------- 96
16 Schematic Diagram Notes ----------------------------------- 97
17 Schematic Diagram--------------------------------------------- 98
17.1. CD SERVO CIRCUIT ----------------------------------- 98
17.2. MAIN CIRCUIT (1/4) ------------------------------------ 99
17.3. MAIN CIRCUIT (2/4) ---------------------------------- 100
17.4. MAIN CIRCUIT (3/4) ---------------------------------- 101
17.5. MAIN CIRCUIT (4/4)-----------------------------------102
17.6. FL CIRCUIT, PANEL 1 CIRCUIT and PANEL
2 CIRCUIT------------------------------------------------103
17.7. TUNER CIRCUIT, AUX/HP CIRCUIT, IR
CIRCUIT, MOTOR CIRCUIT, POSITION SW
CIRCUIT and iPod SW CIRCUIT-------------------104
17.8. iPod CIRCUIT and AC IN CIRCUIT----------------105
17.9. D-AMP CIRCUIT----------------------------------------106
17.10. SMPS CIRCUIT -----------------------------------------107
17.11. USB CIRCUIT -------------------------------------------108
18 Printed Circuit Board-----------------------------------------109
18.1. CD SERVO P.C.B.-------------------------------------- 109
18.2. MAIN P.C.B. (1/2)--------------------------------------- 110
18.3. MAIN P.C.B. (2/2)--------------------------------------- 111
18.4. TUNER P.C.B., FL P.C.B., PANEL 1 P.C.B.,
PANEL 2 P.C.B., AUX/HP P.C.B. and IR
P.C.B. ------------------------------------------------------ 112
18.5. MOTOR P.C.B., POSITION SW P.C.B., iPod
SW P.C.B., iPod P.C.B. and D-Amp P.C.B. ------ 113
18.6. SMPS P.C.B., AC IN P.C.B. and USB P.C.B. ---- 114
19 Terminal Function of IC’s ----------------------------------- 115
19.1. IC801 (RFKWMAHC4EP) MICRO
PROCESSOR IC --------------------------------------- 115
19.2. IC7001 (MN6627954AMA) IC SERVO
PROCESSOR ------------------------------------------- 116
19.3. IC7002 (BA5948FPE2) IC 4CH Drive ------------- 117
20 Exploded View and Replacement Parts List---------- 118
20.1. Exploded View and Mechanical replacement
Parts List -------------------------------------------------- 118
20.2. Electrical Replacement Parts List ------------------124
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, C728 and C730 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 ~250 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
6
REXX0746-1
RED WIRE (AC INLET-SMPS)
7
REXX0747-1
BLACK WIRE (AC INLET-SMPS)
9
REXX0752-1
BLUE WIRE (AC INLET-SMPS)
30
RGNX0850A
NAME PLATE LABEL
101
REXX0771
WHITE WIRE (JW708)
102
REXX0772
BROWN WIRE (JW707)
300
RAE0165T-V
TRAVERSE ASS’Y
(RTL)
A2
K2CQ2CA00007
AC CORD
A3
RQTX0257-1B
O/I BOOK (En)
A3
RQTX0259-1R
O/I BOOK (Ru/Ur)
L702
G0B333E00002
LINE FILTER
L751
ELF15N035AN
LINE FILTER
T581
G4D1A0000117
SWITCHING TRANSFORMER
T701
G4DYA0000155
MAIN TRANSFORMER
T751
ETS19AB221AG
BACKUP TRANSFORMER
Z752
ERZV10V511CS
ZNR
PC701
B3PBA0000454
PHOTO COUPLER
PC751
B3PBA0000454
PHOTO COUPLER
RY701
K6B1AEA00017
RELAY
F751
K5D162BK0005
FUSE
FP581
K5H7512A0010
PROTECTOR
TH701
D4CAC8R00002
THERMISTOR
P751
K2AA2B000017
AC INLET
C702
ECQU2A104MLC
0.1uF
C710
F1BAF471A013
470pF
C725
ECQU2A104MLC
0.1uF
C727
F1BAF471A013
470pF
C728
F1BAF471A013
470pF
C730
F1BAF1020020
1000pF
Page of 127
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Here you can read online and download Panasonic SC-HC4EP Service Manual in PDF. SC-HC4EP service manual will guide through the process and help you recover, restore, fix, disassemble and repair Panasonic SC-HC4EP Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.