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DP450P
LG DP450P Service Manual
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3-22
2. POWER BLOCK DIAGRAM
Battery Charge Circuit
BAT Con
A
C/DC Adapter
12V
in
BAT
ou
t
FET
SW
(12
V
i
n
)
Charge E
na
ble
Cha
rge
Thermi
st
e
r
Divide
Divide
DC
Sense
BAT
Sen
s
e
DC-DC
AM5898N
Reg
5VA
3.3
V
1.8
V
S/W
S/W
A+5V
Sta
ndb
y
LCD
Panel
Video
Audio
System
Servo
A+5V
Bat
ter
y
out
3.3
V
1.8
V
LCD
Vcc
7.5
V
15V
-10V
DV
7.5
V
15V
-10V
5VD
A+5V
M5V
Charge
Discharge
RCR
256
1
GT6
312
REMOCON
RECEIVER
5VA
28
30
Table of Contents
Section 1 Summary
3
Default Chapter
3
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
Liquid Crystal Display
6
Exploded Views
8
Exploded Views
9
Cabinet and Main Frame Section
9
Packing Accessory Section
10
Section 3 Electrical
12
Lcd Part
13
Lcd Electrical Troubleshooting Guide
13
Block Diagram
14
Circuit Diagram
15
Printed Circuit Board Diagram
16
Main Part
18
Main Electrical Troubleshooting Guide
18
Power (DC-DC Converter Circuit)
18
Mpeg Circuit
21
Rf/Servo Circuit
22
Charging Circuit
25
Details and Waveforms on System Test and Debugging
26
SYSTEM 27Mhz CLOCK
26
Sdram Clock
26
Mt1389 Video Output Waveform
27
Audio Output from Audio Dac
27
Block Diagrams
28
Overall Block Diagram
28
Power Block Diagram
29
Servo Block Diagram
30
System Block Diagram
31
A/V Block Diagram
32
Circuit Diagrams
34
Mpeg Circuit Diagram
34
Memory Circuit Diagram
35
Opu & Motor Circuit Diagram
36
Av Circuit Diagram
37
Charge Circuit Diagram
38
Lcd I/F Circuit Diagram
39
Key Circuit Diagram
40
Circuit Voltage Chart
41
Printed Circuit Board Diagrams
43
Main P.C.board
43
Key P.C.board
45
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LG DP450P Specifications
General
Brand
LG
Model
DP450P
Category
Portable DVD Player
Language
English
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