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MDV902-A0U
LG MDV902-A0U Service Manual
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KARAOKE MINI
HOME THEA
TER
S
E
R
VICE
M
ANUAL
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
JUL
Y
, 2007
http://biz.lgservice.com
2
Table of Contents
Table of Contents
2
Servicing Precautions
3
Notes Regarding Handling of the Pick-Up
3
Notes Regarding Compact Disc Player Repairs
4
Esd Precautions
5
Location of Users Controls
6
Remote Control
7
Specifications
8
Exploded Views
10
Cabinet and Main Frame Section
10
Tape Deck Mechanism Exploded View
11
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 View
13
Speaker Exploded View
14
Model : Mds902V (Front Speakers)
14
Model : Mds902S (Rear Speakers)
15
Model : Mds902W (Subwoofer)
16
Packing Accessory Section
18
Electrical Troubleshooting Guide
19
Power (Smps)
19
P-Sens
20
Vkk Check
20
Micom (Ic302) Change
21
P-Ctrl Check
21
Muting Troubleshooting (Mute State)
22
Expend IC (Ic501 / 502) State
22
Function Mode Has no Sound (Njw1190) Ic601
23
Ic601 (Njw1190) Troublushooting
27
Amp Module Troubleshooting
28
Rec Check
29
Dubbing Check ("Normal or Rec" // "High")
30
INTERNAL BLOCK DIAGRAM of Ics
31
Ha12237F
31
Njw1190
32
Af330W20Ft
32
Af350W01Ft
34
Block Diagram
34
Wiring Diagram
36
Schematic Diagrams
38
Smps (Power) Schematic Diagram
38
Sub Smps (Power) Schematic Diagram
39
Audio Main Schematic Diagram
40
Deck Schematic Diagram
41
Usb, Aux2 & Headphone Amp Schematic Diagram
42
I/O Jack Schematic Diagram
43
Amp Schematic Diagram
44
Woofer Amp Schematic Diagram
45
Front Schematic Diagram
46
Printed Circuit Diagrams
47
Main P.C.board
47
Smps (Power) P.C.board
49
Sub Smps (Power) P.C.board
49
Front P.C.board
51
Amp P.C.board
52
Woofer Amp P.C.board
53
DVD Part Electrical
54
Electrical Troubleshooting Guide
54
Power
54
Test & Debug
55
Usb
60
Waveforms
61
When Power On, Reset & Data Etc Waveform
61
Open / Close Waveform at Power on
62
Starting Action Waveform in MD Device
62
Focus Waveform (at CD)
63
Focus Waveform (at DVD)
63
At Power On, Spindle Signal at MD Deck
64
At First Action, Focus Signal A, B, C, D
64
Tracking Signal
65
Rf Waveform
65
Disk Type Jugement Waveform
66
Schematic Diagrams
68
Mpeg Schematic Diagram
68
Servo Schematic Diagram
69
Usb Schematic Diagram
70
Interface Schematic Diagram
71
Printed Circuit Diagram
72
DVD P.C.board
72
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LG MDV902-A0U Specifications
General
Brand
LG
Model
MDV902-A0U
Category
Home Theater System
Language
English
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