Panasonic sc hc 20 p service manual
This is the 115 pages manual for panasonic sc hc 20 p service manual.
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Extracted text from panasonic sc hc 20 p service manual (Ocr-read)
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2 9.3. Main Parts Location Diagram ------------------------- 24 9.4. Disassembly of Stand Unit ----------------------------- 25 9.5. Disassembly of iPod/iPhone P.C.B. ----------------- 25 9.6. Disassembly of Sub Rear Panel --------------------- 27 9.7. Disassembly of Docking Tub and Tub Cover ----- 28 9.8. Disassembly of Tuner P.C.B. -------------------------- 30 9.9. Disassembly of SMPS P.C.B. ------------------------- 31 9.10. Replacement of Switching Regulator IC (IC702) ------------------------------------------------------ 32 9.11. Replacement of Diode (D702) ------------------------ 33 9.12. Disassembly of Net Frame Unit ---------------------- 35 9.13. Disassembly of Front Cabinet unit ------------------- 37 9.14. Disassembly of Motor P.C.B., Bridge 1 P.C.B. & Position Switch P.C.B.-------------------------------- 38 9.15. Disassembly of Motor Assembly --------------------- 39 9.16. Replacement of CD Door Ornament ---------------- 41 9.17. Replacement of CD Door Base ----------------------- 42 9.18. Replacement of Door Shaft & CD Door Slider Bottom ------------------------------------------------------ 44 9.19. Replacement of Rack Top, Slider Top & Timing Gear Shaft ---------------------------------------- 47 9.20. Disassembly of Speaker unit -------------------------- 49 9.21. Disassembly of Speaker P.C.B. & Bridge 2 P.C.B.-------------------------------------------------------- 49 9.22. Disassembly of Traverse Deck ----------------------- 50 9.23. Disassembly of Traverse Cover --------------------- 52 9.24. Disassembly of CD Servo P.C.B.--------------------- 53 9.25. Disassembly of LCD Holder Unit and Panel P.C.B.-------------------------------------------------------- 53 9.26. Disassembly of Headphone/Aux P.C.B. ------------ 54 9.27. Disassembly of Top Ornament Unit and Panel Key P.C.B.-------------------------------------------------- 55 9.28. Disassembly of Main P.C.B. --------------------------- 56 9.29. Replacement of Transistor (Q512)------------------- 57 10 Service Position-------------------------------------------------59 10.1. Checking & Repairing of SMPS P.C.B. ------------- 59 10.2. Checking & Repairing of Panel P.C.B. -------------- 60 10.3. Checking & Repairing of CD Servo P.C.B.--------- 62 10.4. Checking & Repairing of Main P.C.B. (Side B) --- 64 10.5. Checking & Repairing of Main P.C.B. (Side A) --- 66 11 Voltage Measurement & Waveform Chart---------------69 11.1. CD SERVO P.C.B. --------------------------------------- 69 11.2. MAIN P.C.B. (1/3) ---------------------------------------- 70 11.3. MAIN P.C.B. (2/3) ---------------------------------------- 71 11.4. MAIN P.C.B. (3/3) ---------------------------------------- 72 11.5. Panel P.C.B. ----------------------------------------------- 72 11.6. TUNER P.C.B. -------------------------------------------- 72 11.7. SMPS P.C.B. ---------------------------------------------- 73 11.8. Waveform Chart ------------------------------------------ 74 12 Illustration of ICs, Transistors and Diodes------------75 13 Overall Simplified Block--------------------------------------77 14 Block Diagram---------------------------------------------------78 14.1. SERVO/SYSTEM CONTROL BLOCK DIAGRAM -------------------------------------------------- 78 14.2. AUDIO BLOCK DIAGRAM ---------------------------- 79 14.3. POWER SUPPLY BLOCK DIAGRAM -------------- 80 15 Wiring Connection Diagram---------------------------------81 16 Schematic Diagram Notes-----------------------------------83 17 Schematic Diagram---------------------------------------------85 17.1. CD SERVO CIRCUIT ----------------------------------- 85 17.2. MAIN CIRCUIT (1/4) ------------------------------------ 8617.3. MAIN CIRCUIT (2/4) ------------------------------------ 87 17.4. MAIN CIRCUIT (3/4) ------------------------------------ 88 17.5. MAIN CIRCUIT (4/4) ------------------------------------ 89 17.6. PANEL CIRCUIT ----------------------------------------- 90 17.7. TUNER / PANEL KEY / HEADPHONE/AUX / POSITION SWITCH CIRCUIT ----------------------- 91 17.8. MOTOR / BRIDGE 1 / SPEAKER / BRIDGE 2 CIRCUIT --------------------------------------------------- 92 17.9. SMPS CIRCUIT ------------------------------------------ 93 17.10. iPod/iPhone CIRCUIT ---------------------------------- 94 18 Printed Circuit Board------------------------------------------95 18.1. CD SERVO/ TUNER/ iPod/iPhone P.C.B. --------- 95 18.2. MAIN P.C.B. ----------------------------------------------- 96 18.3. PANEL/ PANEL KEY/ HEADPHONE/AUX/ POSITION SWITCH/ MOTOR P.C.B. -------------- 97 18.4. BRIDGE 1/ SPEAKER/ BRIDGE 2/ SMPS P.C.B. ------------------------------------------------------- 98 19 Terminal Function of ICs------------------------------------99 19.1. IC801 (RFKWMHC10EB) MICRO PROCESSOR IC ---------------------------------------- 99 19.2. IC7001 (MN6627954AMA) IC SERVO PROCESSOR ------------------------------------------- 100 19.3. IC7002 (BA5948FPE2) IC 4CH Drive ------------- 101 20 Exploded View and Replacement Parts List----------103 20.1. Exploded View and Mechanical replacement Parts List -------------------------------------------------- 103 20.2. Electrical Replacement Parts List ------------------ 109
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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