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MCD23
LG MCD23 User Manual
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3-16
Copyright ©
2008 LG Electronics
.
Inc.
All right reser
ved.
Only for tr
aining and ser
vice purposes
LGE Internal Use Only
PS9
830B
PWM
MODULATO
PS9830B
PWM
MODULATOR
T
A
S5342_L
Po
w
e
r
Amp
TAS5342_L
Powe
r Amp
FR
FL
FL+/-, FR+/-
AMP BOARD
MAIN BOARD
SANY
O
AUDIO
MICOM
SANYO
AUDIO
MICOM
12.288 MH
z
9.8304 MH
z
9830_RESE
T
9830_CLK
9830_DA
T
AMP
_
PD
N
AMP
_
SD
BA3308
TAPE IC
DECK
REC MUTE
P/B MUTE
REC SW
P/B SW
DECK KEY
TUNER
MODULE
ï
DAT.CLK
RDS
DATA.CLK
BU4052
TAPE L/R
TUNER L/R
OP
AMP
CD
BLOCK
OP AMP
LEVEL METE
R
REC L/R
PT6324
DVD DATA.CLK
P/T INPUT
HEAD PHONES
BU4052 DATA
USB DA+.-.5V
VFD DATA.CL
K
CD DATA.CLK
CS5340
CLK.DATA
H/P
PWM OUT
AK
5358
1.
MAIN BLOCK DIA
GRAM
BLOCK DIA
GRAMS
28
30
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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