Panasonic SC-TM72DV - Power Amp IC Replacement

Panasonic SC-TM72DV

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• Replacement of Power Amp IC

Step 1 Remove 2 screws fixed to the Power Amplifier IC.

Step 2 Remove 2 screws fixed to the Power Amplifier IC and Voltage Regulator.

Step 3 Break the joint with a metal cutter as shown below.

Table of Contents

Default Chapter2
- Table of Contents2
1 Before Use5
2 Before Repair and Adjustment5
3 Protection Circuitry6
4 Safety Precautions7
- General Guidelines7
- Leakage Current Cold Check7
- Leakage Current Hot Check (See Figure 1)8
5 Prevention of Electro Static Discharge (ESD) to Electrostatically Sensitive (ES) Devices8
6 Handling the Lead-Free Solder9
- About Lead Free Solder (Pbf)9
7 Cautions to be Taken When Handling Optical Pickup9
- Handling Optical Pickup9
- Replacing Precautions for Optical Pickup Unit10
- Grounding for Preventing Electrostatic Destruction10
8 Precaution of Laser Diode10
9 Accessories12
10 Operation Procedures13
11 Disc Information15
12 About Highmat16
- What Is Highmat16
- Why Use Highmat16
- The Advantages of Using Highmat17
- Outline of the Highmat Standard18
13 Procedure for Repairing the Set19
- Distinguish the Problem20
- Troubleshooting Guide Part21
- Checking of VIDEO COMPONENT OUTPUT23
- Diagnosis of Optical Pick-Up Unit23
14 Optical Pickup Self-Diagnosis and Replacement Procedure24
- Self-Diagnosis24
- Cautions to be Taken During Replacement of Optical Pickup and Spindle Motor26
- Cautions to be Taken During Replacement of Optical Pickup26
15 Self-Diagnosis Function27
- Automatic Displayed Error Codes28
- Automatic Display Function28
- Re-Display28
- Description of Error Code28
- Memorized Error Codes28
- Activating Self-Diagnosis Function and Displaying Method29
- Re-Display29
- Mode Table31
- Tray Lock Function33
- Setting33
- Disc Lock Function33
- Things to Do after Repair34
16 Cautions to be Taken During Servicing34
- Recovery after the DVD Player Is Repaired35
- DVD Player Firmware Version Upgrade Process35
- Firmware Version Upgrade Process by Using Disc and Recovery Process35
- Self-Diagnosis Function35
- Using Recovery Disc36
- Recovery Process36
- Version Upgrade Process36
- Total Usage Time Display36
- After Replacement of DVD Module37
17 Disassembly and Assembly of Main Component37
- Disassembly Flow Chart38
- Disassembly of Top Cabinet38
- Disassembly for DVD Changer Unit39
- Disassembly of the DVD Module P.C.B40
- Disassembly for Panel P.C.B., MIC P.C.B.& Tact Switch P.C.B41
- Disassembly of Lid44
- Disassembly of Main P.C.B., Power P.C.B., , Power Amp P.C.B., Power Supply P.C.B., Transformer P.C.B.& Voltage Selector P.C.B44
- Disassembly of Power Amp P.C.B45
- Disassembly of Power P.C.B46
- Disassembly of Power Supply P.C.B47
- Disassembly of Transformer P.C.B.& Voltage Selector P.C.B50
- Replacement for Traverse Deck50
- Replacement for Optical Pickup Unit (DVD Mechanism)52
- Procedure for Removing CD Loading Mechanism57
- CR16 Mechanism Disassembly Procedure57
- Gear for Servicing Information57
- Replacement for the Disc Tray57
- Replacement for the Traverse Deck62
- Disassembly for CD Loading Unit63
- Cr16 Mechanism Assembly Procedure72
- Disassembly for Traverse Unit105
- Disassembly of Deck Mechanism Unit109
- Replacement for the CD Motor Ass'y, Capstan Belt A, Capstan Belt B and Winding Belt113
- Counter-Measure for Tape Trouble121
18 Service Position122
- Checking Procedure122
- Checking the Main P.C.B., Power P.C.B., Power Supply P.C.B., Power Amp P.C.B., Transformer P.C.B., Voltage Selector P.C.B. and AC Inlet P.C.B122
- Checking the Panel P.C.B., Tact Switch P.C.B., MIC P.C.B., Deck P.C.B.& Deck Mechanism P.C.B124
19 Measurements and Adjustments125
- Cassette Deck Section125
- Head Azimuth Adjustment (Deck 1/2)125
- Tape Speed Adjustment (Deck 1/2)126
- Bias and Erase Voltage Check127
- Bias Frequency Adjustment (Deck 1/2)127
- Tuner Section128
- AM-IF Alignment128
- AM RF Adjustment129
- Alignment Points129

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