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DM5420K
LG DM5420K User Manual
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KARAOKE DVD Mini Hi-Fi System
SERVICE MANUAL
MODEL: DM5420K
(DM5420K, DMS5420V)
CAUTION
BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS”
IN THIS MANUAL.
MODEL: DM5420K (DM5420K, DMS5420V)
SERVICE MANUAL
P/NO : AFN75814472
JULY, 2012
Website http://biz.lgservice.com
Internal Use Only
2
Table of Contents
Table of Contents
3
Servicing Precautions
4
Esd Precautions
6
Service Information for Eeprom
7
Program Update Guide
8
How to Update Micom Program
8
How to Update DVD(Ess) Program
9
Specifications
10
Exploded Views
14
Cabinet and Main Frame Section (Dm5420K)
14
Packing Accessory Section
16
Speaker Section
17
Electrical Troubleshooting Guide
19
Smps Part
19
Audio Abnormal
21
Function Mode Audio Abnormal
22
CD Part
24
DVD Reading Check
25
Usb Part
26
Vfd Display Check
27
Waveforms of Major Check Point
28
When Power On, Reset & Data Etc Waveform
28
When Usb Function Operating
28
Starting Action Waveform in MD Device (Sled Home)
29
Focus Waveform
30
At First Action, Focus Signal A, B, C, D
33
Rf Waveform (Analog Scope)
33
Wiring Diagram
34
Block Diagram
35
Circuit Diagrams
36
Smps Circuit Diagram
36
DVD Mpeg/ Adc/ Composite/ Usb Circuit Diagram
37
S3050/ S8082/ MIC Circuit Diagram
38
Dsp/ Spbana/ Headphone Circuit Diagram
39
Amplifier Circuit Diagram
40
Mcu/ Tuner/ Aux Circuit Diagram
41
Vfd/ Key/ Led Circuit Diagram
42
Tape Circuit Diagram (Optional Part)
43
Circuit Voltage Chart
44
Capacitors
44
Connectors
45
Printed Circuit Board Diagrams
46
Smps P.C.board
46
Main P.C.board
47
Vfd / Usb P.C.board
49
Key_R P.C.board
49
MIC P.C.board
50
Key_Top P.C.board
50
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LG DM5420K Specifications
General
Brand
LG
Model
DM5420K
Category
Stereo System
Language
English
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