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MCV903 Series
LG MCV903 Series Service Manual
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4-4
Copyright ©
2008 LG Electronics
.
Inc.
All right reserved.
Only for tr
aining and ser
vice purposes
LGE Internal Use Only
MCK
BCK
LRCK
DATA
AUDIO_L
AUDIO_R
3.
A
UDIO P
A
TH
D
AC_ I2S
IC807 PIN38,39,40,41
A
UDIO_ L/ R
CE
CLK
DI
DO
4.
TUNER
USB_5V
D+
D-
MCK
LRCK
BCK
DATA
5.
USB
6.
ADC
USB D+/ D-
CN803 PIN2,3,4
ADC I2S
IC805 PIN11,12,10,9
TUNER SPI
TUN800 PIN5,7,8,9
76
78
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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