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LM-U5050A
LG LM-U5050A User Manual
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3CD CHANGER
HI-FI SYSTEM
SER
VICE MANU
AL
MODEL:
LM-U2350A,
LMS-U2350
LM-U4050A,
LMS-U4050,
LMS-U4050W
LM-U5050A,
LMS-U5050,
LMS-U5050
W
,
LMS-U5050S
SE
R
VICE MAN
U
AL MODEL
:
LM-U2350A
,
LMS-U2350
,
LM-U4050A
,
LMS-U4050
,
LMS-U4050
W
,
LM-U5050A
,
LMS-U5050
,
LMS-U5050
W
,
LMS-U5050S
CA
UTION
BEFORE SERVICING
THE UNIT
, READ THE “SAFETY PRECA
UTIONS”
IN THIS MANU
AL.
2
Table of Contents
Table of Contents
2
General
3
Notes Regarding Handling of the Pick-Up
3
Repair Notes
3
Servicing Precautions
3
Clearing Malfunction
4
Caution. Graphic Symbols
5
Electrostatically Sensitive Devices (ESD)
5
Esd Precautions
5
Specifications
6
Electrical Troubleshooting Guide
8
P-Sens Part
8
Smps Power Circuit
8
Micom (Ic301) Check
9
P-Ctrl Check
9
Expend IC(Ic305/501/502) State
10
Muting Troubleshooting (Mute State)
10
Specific Function Mode Has no Sound (Njw1190) Ic601
11
Aux
12
CD
12
MIC
13
Tuner
13
Amp Module Troubleshooting
14
Ic601(Njw1190) Troubleshooting
14
Dubbing Check
16
Block Diagram
17
INTERNAL BLOCK DIAGRAM of Ics
17
Pin Configuration
19
Pin Description
19
Block Diagram
22
Wma_Usb Block Diagram
23
Front Schematic Diagram
24
Schematic Diagrams
24
Main Schematic Diagram
25
Deck Schematic Diagram
26
MIC Schematic Diagram
27
Usb_Aux2_H/P Schematic Diagram
28
Woofer Amp Schematic Diagram
29
Amp Schematic Diagram
30
Power Schematic Diagram
31
Sub Power Schematic Diagram
33
Cdp Schematic Diagram
34
Usb Schematic Diagram
35
Wiring Diagrams
36
Main P.C. Board
37
Printed Circuit Diagrams
37
Main Amp P.C. Board
38
Front P.C. Board
40
Cdp P.C. Board
41
Power P.C. Board
43
Sub Power P.C. Board
45
Woofer Amp P.C. Board
46
Cabinet and Main Frame Section
48
Exploded Views
48
Tape Deck Mechanism (A/R & A/S : Right A/R Deck)
49
Tape Deck Mechanism (A/R & A/S : Left A/R Deck)
50
CD Mechanism
51
Speaker Section
52
4
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LG LM-U5050A Specifications
General
Brand
LG
Model
LM-U5050A
Category
Stereo System
Language
English
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