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DP471B
LG DP471B User Manual
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P/NO : AFN
73065036
APRIL
, 2009
PORTABLE DVD
SERVICE MANUAL
MODEL : DP471B
/DP472B/DP473B
CAUTION
BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS”
IN THIS MANUAL.
Website http://biz.lgservice.com
Internal Use Only
MODEL : DP471B
/DP472B/DP473B
SERVICE MANUAL
2
Table of Contents
Table of Contents
3
Product Safety Servicing Guidelines for Video Products
4
Servicing Precautions
5
General Servicing Precautions
5
Insulation Checking Prodedure
5
Electrostatically Sensitive (Es) Devices
5
Specifications
6
Electrical Troubleshooting Guide
13
Power Check Flow
13
System Operation Flow
14
System Test Flow
15
Details and Waveforms on System Test and Debugging
20
System 27Mhz Clock, Reset, Flash Sck Signal
20
Sdram Clock
22
Tray Open/Close Signal
22
Sled Control Related Signal
23
Laser Power Control Related Signal
24
Spindle Control Waveform
24
Focus on Waveform
25
Tracking Control Related Signal(System Checking)
26
Video Output Waveform
27
Audio Output
27
Wiring Connection Diagram
28
Block Diagrams
29
Overall Block Diagram
29
System Block Diagram
30
DC Block Diagram
31
Circuit Diagrams
32
Lcd I/F Circuit Diagram
32
Opu Circuit Diagram
33
Hp/Spk Amp Circuit Diagram
34
Audio I/F Circuit Diagram
35
Motor Drive Circuit Diagram
36
Memory Circuit Diagram
37
Mpeg Circuit Diagram
38
Video Controler Circuit Diagram
39
Av I/F Circuit Diagram
40
Usb I/F Circuit Diagram
41
Lcd Power Circuit Diagram
42
Mpeg Power Circuit Diagram
43
Input Power Circuit Diagram
44
B/L Power Circuit Diagram
45
Charger Power Circuit Diagram
46
Switch & Video Buffer Circuit Diagram
47
Circuit Voltage Chart
48
Printed Circuit Board Diagrams
50
Main P.C. Board
50
Lcd P.C. Board
50
4
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LG DP471B Specifications
General
Brand
LG
Model
DP471B
Category
Portable DVD Player
Language
English
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