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LG MCD23 User Manual
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3-11
Copyright ©
2008 LG Electronics
.
Inc.
All right reser
ved.
Only for tr
aining and ser
vice purposes
LGE Internal Use Only
2.
USB P
AR
T CHECK
NO
NO
CHECK CN603
Plug- in USB De
vice
YES
Displa
y “READ”
YES
Displa
y “NO
FILE”
YES
YES
YES
Displa
y “NO
USB”
YES
Check USB_ 5V
NO
CHECK USB JA
CK( JK303)
YES
Check USB_ D+/ D-
(R863, R865)
NO
Replace IC801
Check IC801
(PIN 116, 117)
USB FUNCTION
CHECK USB A
UDIO FILE
IN USB DEVICE (MP3,
WMA FILE IS PLA
Y
ABLE)
23
25
Table of Contents
Section 1. General
3
Notes Regarding Handling of the Pick-Up
3
Servicing Precautions
3
Notes Regarding Compact Disc Player Repairs
4
Safety Precautions
5
Service Information for Eeprom
6
Program Download Guide
7
Specifications
9
Section 2. Exploded Views
10
Cabinet and Main Frame Section
10
Mechanism Deck Exploded View
11
Speaker Exploded View
12
Packing Accessory View
13
Section 3. Electrical Part
14
Audio Electrical Troubleshooting Guide
14
Vkk Check
15
Micom Part Check I
15
Pwm Modulation Part Check
18
Power Amp Part Check
19
Tape Play Part Check
21
Tape Rec Part Check
22
CD Electrical Troubleshooting Guide
23
Usb Function
24
Waveforms of Major Check Point
25
Audio Path
26
Wiring Diagram
28
Main Block Diagram
29
CD Block Diagram
30
Smps(Power) Circuit Diagram
32
Main Circuit Diagram
33
Servo Circuit Diagram
34
Dsp Circuit Diagram
35
Adc Circuit Diagram
36
Front Circuit Diagram
37
Amp Circuit Diagram
39
Usb Circuit Diagram
40
MIC Circuit Diagram
41
Key Circuit Diagram
42
INTERNAL BLOCK DIAGRAM of Ics
44
Pin Assignment
44
Block Diagram
45
Pin Description
45
Pin Configuration
50
Pin / Function
51
Typical System Block Diagram
53
Functional Block Diagram
54
Circuit Voltage Chart
60
Printed Circuit Board Diagrams
62
Smps P.C. Board Diagram
66
Front P.C. Board Diagram
67
Section 4. Disassembly and Assembly of Mechanism Deck
70
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LG MCD23 Specifications
General
Brand
LG
Model
MCD23
Category
Stereo System
Language
English
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