Page 1
2 9.11. Disassembly of Front Panel Block ------------------- 34
9.12. Disassembly of Tuner Pack --------------------------- 34
9.13. Disassembly of SMPS Unit ---------------------------- 35
9.14. Disassembly of AC IN P.C.B.-------------------------- 36
9.15. Disassembly of SMPS P.C.B. ------------------------- 38
9.16. Replacement of Switching Regulator IC
(IC702) ------------------------------------------------------ 39
9.17. Replacement of Diode (D702) ------------------------ 41
9.18. Replacement of Diode (D704) ------------------------ 43
9.19. Disassembly of Main P.C.B. --------------------------- 45
9.20. Disassembly of Fan-------------------------------------- 48
9.21. Disassembly of AUX / HP P.C.B. --------------------- 48
9.22. Disassembly of Traverse Deck ----------------------- 49
9.23. Disassembly of Traverse Cover & Traverse
Unit----------------------------------------------------------- 50
9.24. Disassembly of CD Servo P.C.B.--------------------- 51
9.25. Disassembly of D-Amp P.C.B. ------------------------ 52
9.26. Disassembly of Fan Unit (iPod) ---------------------- 52
9.27. Disassembly of FL P.C.B. ------------------------------ 53
9.28. Disassembly of iPod P.C.B.---------------------------- 54
9.29. Disassembly of Motor P.C.B. -------------------------- 58
9.30. Disassembly of Position SW P.C.B. ----------------- 59
9.31. Disassembly of iPod SW P.C.B. ---------------------- 60
9.32. Disassembly of IR P.C.B.------------------------------- 61
10 Service Position-------------------------------------------------62
10.1. Checking and Repairing Main P.C.B. --------------- 62
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 ICs, 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 ------------------------------------------------- 9617.7. TUNER CIRCUIT, AUX/HP CIRCUIT, IR
CIRCUIT, MOTOR CIRCUIT, POSITION SW
CIRCUIT and iPod SW CIRCUIT -------------------- 97
17.8. iPod CIRCUIT and AC IN CIRCUIT----------------- 98
17.9. D-AMP CIRCUIT ----------------------------------------- 99
17.10. SMPS CIRCUIT ----------------------------------------- 100
18 Printed Circuit Board-----------------------------------------101
18.1. CD SERVO P.C.B.-------------------------------------- 101
18.2. MAIN P.C.B. (1/2) --------------------------------------- 102
18.3. MAIN P.C.B. (2/2) --------------------------------------- 103
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. ------------------------------------------------------ 104
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. ------ 105
18.6. SMPS P.C.B. and AC IN P.C.B. --------------------- 106
19 Terminal Function of ICs-----------------------------------107
19.1. IC801 (RFKWMAHC3-S) MICRO
PROCESSOR IC --------------------------------------- 107
19.2. IC7001 (MN6627954AMA) IC SERVO
PROCESSOR ------------------------------------------- 108
19.3. IC7002 (BA5948FPE2) IC 4CH Drive ------------- 109
20 Exploded View and Replacement Parts List----------11 0
20.1. Exploded View and Mechanical replacement
Parts List -------------------------------------------------- 110
20.2. Electrical Replacement Parts List ------------------ 116
Page 2
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.
(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 manufacturers 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 1MΩ 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 1.5kΩ, 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
