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PSG0904018CE
A6

Compact Stereo System
Model No. SC-HC3P
SC-HC3PC
Product Color: (S)...Silver Type

TABLE OF CONTENTS
PAGE PAGE
1 Safety Precautions----------------------------------------------- 3 6.1. Disc and MP3 Information ----------------------------- 13
1.1. General Guidelines---------------------------------------- 3 7 Self diagnosis and special mode setting --------------- 14
1.2. Before Repair and Adjustment ------------------------- 4 7.1. Service Mode Summary Table------------------------ 14
1.3. Caution For Fuse Replacement------------------------ 4 7.2. Service Mode Table ------------------------------------- 15
1.4. Protection Circuitry ---------------------------------------- 4 7.3. Error Code Table ----------------------------------------- 17
1.5. Safety Part Information----------------------------------- 4 8 Troubleshooting Guide --------------------------------------- 18
2 Warning -------------------------------------------------------------- 6 8.1. CD Door Unit Jam--------------------------------------- 18
2.1. Prevention of Electro Static Discharge (ESD) 9 Disassembly and Assembly Instructions--------------- 20
to Electrostatically Sensitive (ES) Devices---------- 6 9.1. Disassembly flow chart --------------------------------- 21
2.2. Precaution of Laser Diode------------------------------- 7 9.2. Type of Screw--------------------------------------------- 22
2.3. Service caution based on Legal restrictions -------- 8 9.3. Main Parts Location Diagram ------------------------- 22
3 Service Navigation ----------------------------------------------- 9 9.4. Disassembly of CD Door Unit------------------------- 23
3.1. Service Information --------------------------------------- 9 9.5. Disassembly of Net Frame Assembly--------------- 25
4 Specifications ----------------------------------------------------10 9.6. Disassembly of Top Ornament------------------------ 27
5 Location of Controls and Components ------------------11 9.7. Disassembly of Bottom Ornament ------------------- 28
5.1. Main Unit Key Button Operations--------------------- 11 9.8. Disassembly of Speaker Unit (SP1) ----------------- 29
5.2. Remote Control Key Button Operations ------------12 9.9. Disassembly of Speaker Unit (SP2) ----------------- 30
6 Operating Instructions-----------------------------------------13 9.10. Disassembly of Panel 1 & Panel 2 P.C.B. --------- 32
9.11. Disassembly of Front Panel Block ------------------- 34 17.7. TUNER CIRCUIT, AUX/HP CIRCUIT, IR
9.12. Disassembly of Tuner Pack --------------------------- 34 CIRCUIT, MOTOR CIRCUIT, POSITION SW
9.13. Disassembly of SMPS Unit ---------------------------- 35 CIRCUIT and iPod SW CIRCUIT-------------------- 97
9.14. Disassembly of AC IN P.C.B.-------------------------- 36 17.8. iPod CIRCUIT and AC IN CIRCUIT----------------- 98
9.15. Disassembly of SMPS P.C.B. ------------------------- 38 17.9. D-AMP CIRCUIT----------------------------------------- 99
9.16. Replacement of Switching Regulator IC 17.10. SMPS CIRCUIT ----------------------------------------- 100
(IC702) ------------------------------------------------------ 39 18 Printed Circuit Board----------------------------------------- 101
9.17. Replacement of Diode (D702) ------------------------ 41 18.1. CD SERVO P.C.B.-------------------------------------- 101
9.18. Replacement of Diode (D704) ------------------------ 43 18.2. MAIN P.C.B. (1/2)--------------------------------------- 102
9.19. Disassembly of Main P.C.B. --------------------------- 45 18.3. MAIN P.C.B. (2/2)--------------------------------------- 103
9.20. Disassembly of Fan-------------------------------------- 48 18.4. TUNER P.C.B., FL P.C.B., PANEL 1 P.C.B.,
9.21. Disassembly of AUX / HP P.C.B.--------------------- 48 PANEL 2 P.C.B., AUX/HP P.C.B. and IR
9.22. Disassembly of Traverse Deck ----------------------- 49 P.C.B. ------------------------------------------------------ 104
9.23. Disassembly of Traverse Cover & Traverse 18.5. MOTOR P.C.B., POSITION SW P.C.B., iPod
Unit----------------------------------------------------------- 50 SW P.C.B., iPod P.C.B. and D-Amp P.C.B. ------ 105
9.24. Disassembly of CD Servo P.C.B.--------------------- 51 18.6. SMPS P.C.B. and AC IN P.C.B. --------------------- 106
9.25. Disassembly of D-Amp P.C.B. ------------------------ 52 19 Terminal Function of IC's ----------------------------------- 107
9.26. Disassembly of Fan Unit (iPod) ---------------------- 52 19.1. IC801 (RFKWMAHC3-S) MICRO
9.27. Disassembly of FL P.C.B. ------------------------------ 53 PROCESSOR IC --------------------------------------- 107
9.28. Disassembly of iPod P.C.B.---------------------------- 54 19.2. IC7001 (MN6627954AMA) IC SERVO
9.29. Disassembly of Motor P.C.B. -------------------------- 58 PROCESSOR ------------------------------------------- 108
9.30. Disassembly of Position SW P.C.B. ----------------- 59 19.3. IC7002 (BA5948FPE2) IC 4CH Drive ------------- 109
9.31. Disassembly of iPod SW P.C.B. ---------------------- 60 20 Exploded View and Replacement Parts List---------- 110
9.32. Disassembly of IR P.C.B.------------------------------- 61 20.1. Exploded View and Mechanical replacement
10 Service Position ------------------------------------------------- 62 Parts List -------------------------------------------------- 110
10.1. Checking and Repairing Main P.C.B. --------------- 62 20.2. Electrical Replacement Parts List ------------------ 116
10.2. Checking and Repairing D-Amp P.C.B.------------- 68
10.3. Checking and Repairing FL P.C.B. ------------------ 68
10.4. Checking and Repairing CD Servo P.C.B. --------- 69
10.5. Checking and Repairing AC IN P.C.B. -------------- 69
10.6. Checking and Repairing SMPS P.C.B. ------------- 72
11 Voltage Measurement & Waveform Chart--------------- 74
11.1. CD SERVO P.C.B. --------------------------------------- 74
11.2. D-AMP P.C.B. --------------------------------------------- 75
11.3. FL P.C.B. --------------------------------------------------- 75
11.4. MAIN P.C.B. (1/3) ---------------------------------------- 76
11.5. MAIN P.C.B. (2/3) ---------------------------------------- 77
11.6. MAIN P.C.B. (3/3) ---------------------------------------- 78
11.7. SMPS P.C.B. ---------------------------------------------- 78
11.8. Waveform Chart ------------------------------------------ 79
12 Illustration of IC's, Transistors and Diodes ------------ 81
13 Overall Simplified Block -------------------------------------- 82
14 Block Diagram --------------------------------------------------- 85
14.1. CD SERVO BLOCK DIAGRAM ---------------------- 85
14.2. MAIN (1/2) / TUNER / iPod / FL / MOTOR
BLOCK DIAGRAM --------------------------------------- 86
14.3. MAIN (2/2) / D-AMP BLOCK DIAGRAM ----------- 87
14.4. PANEL1/2 / AUX/HP / IR / SMPS / AC IN
BLOCK DIAGRAM --------------------------------------- 88
15 Wiring Connection Diagram --------------------------------- 89
16 Schematic Diagram Notes ----------------------------------- 90
17 Schematic Diagram--------------------------------------------- 91
17.1. CD SERVO CIRCUIT ----------------------------------- 91
17.2. MAIN CIRCUIT (1/4) ------------------------------------ 92
17.3. MAIN CIRCUIT (2/4) ------------------------------------ 93
17.4. MAIN CIRCUIT (3/4) ------------------------------------ 94
17.5. MAIN CIRCUIT (4/4) ------------------------------------ 95
17.6. FL CIRCUIT, PANEL 1 CIRCUIT and PANEL
2 CIRCUIT ------------------------------------------------- 96

2
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.

(This "Safety Precaution" is applied only in U.S.A.)
1. Before servicing, unplug the power cord to prevent an electric shock.
2. When replacing parts, use only manufacturer's recommended components for safety.
3. Check the condition of the power cord. Replace if wear or damage is evident.
4. After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields, etc.
5. Before returning the serviced equipment to the customer, be sure to make the following insulation resistance test to prevent
the customer from being exposed to a shock hazard.

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 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, 10 watts resistor, in parallel with a 0.15F 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

3
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.