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MCD23
LG MCD23 User Manual
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3-73
3-74
Copyright ©
2008 LG Electronics.
Inc.
All right reserved.
Only for training and service purposes
LGE Internal Use Only
4.
FRONT P
.C.
BO
ARD DIAGRAM
SW3D1
SW3D2
SW3D3
SW3D4
SW3D5
SW3D6
SW3D7
SW3D8
SW3D9
SW3E1
SW3E2
R3D1
R3D2
R3D3
R3D4
R3D5
R3D6
R3D7
R3D8
R3D9
R3E1
CN3890
CN3891
Q301
PN3702
R331
R332
R333
R334
R335
R336
R337
R338
R339
C301
C302
C303
C304
C305
RMC301
C306
R343
C307
R344
C308
R345
C309
C310
C311
C312
C313
C314
R361
VR301
R362
R363
R364
C333
R377
R378
R379
C351
C352
C354
C355
C356
C357
C358
D301
D302
R3Z1
R3Z2
R3Z3
R3Z4
IC301
DIG301
07/11/23
MCD23
EAX42720001
W301
W302
W303
W304
W306
W307
W308
W310
W311
W312
W313
W314
W315
W316
W317
W318
W319
W320
W321
W322
W324
W309
W305
W323
66
68
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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