Name: JVC MX-GA77
Brand: JVC
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MX-GA77

Troubleshooting

1. Amplifier

Power malfunction

No output

Table of Contents1
Area Suffix1
Safety Precautions2
Warning2
Importance Administering Point on the Safety3
Fuse Board (Forward Side)3
Power Supply Board (Forward Side)3
Preventing Static Electricity4
Grounding to Prevent Damage by Static Electricity4
Ground the Workbench4
Ground Yourself4
Removing the CD Tray Fitting5
Removing the CD Changer Unit5
Removing the Metal Cover5
Disassembly Method5
Removing the Front Panel Assembly6
Removing the Heat Sink & Amp. Board7
Removing the Tuner Board7
Removing the Rear Panel7
Removing the Main Board8
Removing the Power Cord8
Removing the Power Ics8
Removing the Power Transformer8
Removing the CD Switch Board9
Removing the Front Board9
Removing the Headphone Jack Board9
Removing the Cassette Mechanism Assembly9
Reinstall the CD Tray10
Removing the CD Tray10
CD Changer Unit10
Removing the Sensor Board11
Removing the Turn Tray Motor11
Removing the Belt, the CD Board and the Switch Board12
Removing the CD Mechanism Holder Assembly (Mechanism Included)13
CD Mechanism Section14
Removing the Pickup Unit14
Removing the Motor Board14
Removing the Feed Motor14
Cassette Mechanism Section15
Removing the R/P Head15
Remove the Erase Head15
Remove the Pinch Roller15
Removing the Flywheel16
Removing the Mechanism Board16
Removing the Motor16
Removing the Side Panel17
Removing the Side Speaker17
Speaker Section17
Wiring Connection18
Color Codes18
Adjustment Method19
Tuner19
Adjustment Location of Tuner PCB19
OSC Voltage19
FM THD Adjustment20
FM Search Level Adjustment20
AM(MW) I.F Adjustment20
IF CENTER and THD Adjustment20
Adjust Deck 1 Play Level21
Cassette Deck21
To Adjust Plabyback Level/Rec21
To Adjust Tape Speed21
Adjust Deck 2 Play Level/Rec BIAS22
Flow of Functional Operation until TOC Read23
Cleaning the Pick up Lens24
Life of the Laser Diode24
Semi-Fixed Resistor on the APC PC Board24
Maintenance of Laser Pickup24
Replacement of Laser Pickup24
- Troubleshooting25
- Power Malfunction25
- No Output25
- Tuner Malfunction (FM/AM)26
- Tape26
- CD27
- Power on and CD Function27
- CD - MP3 Parts28
- LC876764 (UIC1) : Microcontroller29
- Pin Layout29
- Block Diagram29
Description of Major Ics 1-29~4229
- Pin Function30
- KA9258D (IC301) : 4-Ch Motor Driver31
- KB9226 (IC101) : RF Amp. & Servo Signal Processor32
- 5L9290 (IC201) : Digital Signal Processor for CDP34
- HA12237 (JIC01) : Audio Signal Processor36
- KS9274 (IC601) : CD-MP3 Decoder37
- TDA7442D (EIC01) : Audio Processor38
- L4959 (PIC02) : Voltage Regulator39
- M11L1644 (Ic602) : Dram40
- STK403-070 (FIC01) : Power Amp.41
- STK412-020 (WIC01) : Power Amp.41
- Pt8300 (Uic03, Uic04) : Dram42
- Compact Component System45
- Block Diagram47
- Standard Schematic Diagrams48
- Main Section48
- FL Display & System Control Section50
- CD Section54
- Printed Circuit Boards58
- Main Board58
- Front Board60
- Power Supply Board65
- Parts List67
- Exploded View of General Assembly and Parts List68
- CD Changer Mechanism68
- Parts List (General Assembly)70
- Speaker Box72
- CD Changer Mechanism Assembly and Parts List73
- Cassette Mechanism Assembly and Parts List75
- Electrical Parts List (Main Board)77
- Electrical Parts List (Front Board)81
- Electrical Parts List (Amp. Board)83
- Packing Materials and Accessories Parts List88
- Parts List (Packing)89
- Parts List (Accessories)89

Brand	JVC
Model	MX-GA77
Category	Stereo System
Language	English

JVC MX-GA77 User Manual

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JVC MX-GA77 Specifications

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