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MCV903 Series
LG MCV903 Series Service Manual
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3-29
3-30
WIRING DIA
GRAM
16P
6P
5P
5P
3P
CD PCB
TUNER
MODULE
3PAGE
CHANGER MD
MAIN
PCB
10P
12P
SMPS PCB
4P
15P
15P
15P
12P
12P
MAIN AMP
PCB
SUB AMP
PCB
Bíd
to B
í
d
B
í
dt
o
B
í
d
B
í
dt
o
B
í
d
B
í
dt
o
B
í
d
8P
13P
40P
USB
MIC
H/P
FRONT PCB
Portable
DOUBLE DECK
MECHANISM
CD_KEY
LED_L
LED_R
8P
13P
3P
2P
12P
Copyright ©
2008 LG Electronics
.
Inc.
All right reserved.
Only for tr
aining and ser
vice purposes
LGE Internal Use Only
49
51
Table of Contents
Section 1. General
3
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
Front / Back Panel
6
Remote Control
7
Specifications
8
Section 2. Exploded Views
12
Cabinet and Main Frame Section
12
Tape Deck Mechanism Exploded View
13
Tape Deck Mechanism (A/R & A/S : Right A/R Deck)
13
CD Mechanism Exploded View
15
Speaker Exploded View
16
Packing Accessory View
20
Optional Parts
20
Section 3. Audio Electrical Part
22
Micom Part Check I
22
Fld Display Check
25
Troubleshooting
25
Tape Play Part Check
30
Tape Rec Part Check
31
Pwm Modulation Part Check
35
Power Amp Part Check
38
INTERNAL BLOCK DIAGRAM of Ics
40
Pin Configuration
41
System Block Diagram
45
Functional Block Diagram
46
Wiring Diagram
50
Main & Front Block Diagram
51
Smps Schematic Diagram
53
Interface Schematic Diagram
56
Deck Schematic Diagram
57
Woofer Amp Schematic Diagram
59
Front Schematic Diagram
60
Printed Circuit Board Diagrams
65
Smps P.C. Board Diagram
65
Front P.C. Board Diagram
70
Section 4. CD Electrical Part
74
Usb Function
75
Waveforms of Major Check Point
76
Audio Path
76
Dsp Schematic Diagram
78
Rf Servo Schematic Diagram
79
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LG MCV903 Series Specifications
General
Brand
LG
Model
MCV903 Series
Category
Stereo System
Language
English
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