LG MDS902W - Service Manual

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KARAOKE MINI

HOME THEATER

SERVICE MANUAL

MODEL : MDV902(MDS902V, MDS902S, MDS902W)

CAUTION

BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS”

IN THIS MANUAL.

MODEL : MDV902(MDS902V, MDS902S, MDS902W)

SERVICE MANUAL

P/NO : AFN35036903 JULY, 2007

http://biz.lgservice.com

Table of Contents

Table of Contents2
Servicing Precautions3
- Notes Regarding Handling of the Pick-Up3
  - Notes Regarding Compact Disc Player Repairs4
Esd Precautions5
Location of Users Controls6
Remote Control7
Specifications8
Exploded Views10
Cabinet and Main Frame Section10
Tape Deck Mechanism Exploded View11
- Tape Deck Mechanism (A/R & A/S : Left A/R Deck)11
- Tape Deck Mechanism (A/R & A/S : Right A/S Deck)12
DVD Mechanism Exploded View13
Speaker Exploded View14
- Model : Mds902V (Front Speakers)14
- Model : Mds902S (Rear Speakers)15
- Model : Mds902W (Subwoofer)16
Packing Accessory Section18
Electrical Troubleshooting Guide19
- Power (Smps)19
- P-Sens20
- Vkk Check20
- Micom (Ic302) Change21
- P-Ctrl Check21
- Muting Troubleshooting (Mute State)22
- Expend IC (Ic501 / 502) State22
- Function Mode Has no Sound (Njw1190) Ic60123
- Ic601 (Njw1190) Troublushooting27
- Amp Module Troubleshooting28
- Rec Check29
- Dubbing Check ("Normal or Rec" // "High")30
INTERNAL BLOCK DIAGRAM of Ics31
- Ha12237F31
- Njw119032
- Af330W20Ft32
- Af350W01Ft34
Block Diagram34
Wiring Diagram36
Schematic Diagrams38
- Smps (Power) Schematic Diagram38
- Sub Smps (Power) Schematic Diagram39
- Audio Main Schematic Diagram40
- Deck Schematic Diagram41
- Usb, Aux2 & Headphone Amp Schematic Diagram42
- I/O Jack Schematic Diagram43
- Amp Schematic Diagram44
- Woofer Amp Schematic Diagram45
- Front Schematic Diagram46
Printed Circuit Diagrams47
- Main P.C.board47
- Smps (Power) P.C.board49
- Sub Smps (Power) P.C.board49
- Front P.C.board51
- Amp P.C.board52
- Woofer Amp P.C.board53
DVD Part Electrical54
Electrical Troubleshooting Guide54
- Power54
- Test & Debug55
- Usb60
Waveforms61
- When Power On, Reset & Data Etc Waveform61
- Open / Close Waveform at Power on62
- Starting Action Waveform in MD Device62
- Focus Waveform (at CD)63
- Focus Waveform (at DVD)63
- At Power On, Spindle Signal at MD Deck64
- At First Action, Focus Signal A, B, C, D64
- Tracking Signal65
- Rf Waveform65
- Disk Type Jugement Waveform66
Schematic Diagrams68
- Mpeg Schematic Diagram68
- Servo Schematic Diagram69
- Usb Schematic Diagram70
- Interface Schematic Diagram71
Printed Circuit Diagram72
- DVD P.C.board72

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