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Projector
RD-JS31
Service manual
LG RD-JS31 Service Manual page 73
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Table of Contents
Troubleshooting
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Table of Contents
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R134
100K
02137-814
C256
0.01U
02237-251
C259
33p
02237-255
C260
R144
30.1K
3300P
02137-8AP
02237-2BU
R145
R136
60.4k
R135
30.1K
02137-8P0
100K
02137-8AP
02137-814
+5V
+5V_STBY_PWR
02237-C05
R64
1K
U45
JP5
PWR_STBYON
4
2
1
2
74HC1G125 02076-0014-00
Header 1x2/1.5-NC
+5V_STBY_PWR
J9
+5V_STBY_PWR
1
2
+5V
3
4
+15V
+5V
5
6
+12V
+15V
7
8
+12V
9
10
JST,PH,S10B-PH-SM3-TB
02237-0A2
+12V
R151
499,1%
02137-8SC
R150
2
1
B
VCC
OUT
6
DTC
590,1%
3
COMP
4
FB
7
RT
8
5
GND
SCP
U24
TL5001A
P5V_FILT
L1
1
2
47uH
02346-0029-00
C47
C250
+
0.1U
10uF/10V
02237-280
C54
02237-512
22p/NC
R147
3
Y1
1M/NC
PWR_STBYON
20MHz/NC
KEYPD_MENU
02237-280
C70
22p/NC
PAL_DEBUG
POWER_LED
PIC_KEYPD_PWR
+12V
+5V
+15V
close to connector
02237-0A2
+
+
+
+5V
U23
AIC1117-3.3
02037-0BZ
I
VI
C252
C49
+
100uF/16V
0.1uF
S-C63MM
C264
0.1U
02237-C05
PNP BEC
Q3
L17
P1P5V_STBY
1
2
47uH
C94
+ C65
02346-0028-00
D5
47uF/25V
10uF/16V
B220
02237-0A1
02237-512
P3P3V_STBY_PWR
C326
0.1uF
R271
4.7K
1
VDD
GND
2
RA5
IR0
3
RA4
IR1
R261
02137-8J8
4
RA3
RS232
0
R262 0
5
RC5
POWER_KEY
02137-8J8
R267
6
RC4
POWEROFF
0 02137-8J8
7
RC3
PW_CTR
0
R263
02137-8J8
PIC16F630
U43
+5V
+5V_STBY_PWR
D15
1N4002
A
C
C214
C213
10uF
0.1uF
+
TANAD
+
02237-0AF
P3P3V
+5V_STBY_PWR
O
VO
4
TAB
C239
C50
C238
+
+
C330
0.1uF
100uF/16V
10uF/MC16V
+
S-C63MM
100uF/16V
S-C63MM
+5V
U7
AIC1084-3.3
02037-0BY
I
VI
VO
TAB
C55
C68
+
100uF/16V
0.1uF
S-C63MM
H1
H2
H8
4MM
4MM
4MM
H3
H4
H5
H6
H7
R265
4MM
4MM
4MM
4MM
4MM
4.7K
KEYPD_PWR
R270
R272
4.7K
4.7K
PIC_KEYPD_PWR
14
R221
0 02137-8J8
13
IR0
R218
12
0 02137-8J8
R220
11
0 02137-8J8
R254
KEYPD_PWR
10
R255
0 02137-8J8
0 02137-8J8
9
PWR_OFF_CMD
R256
8
PWR_STBYON
0 02137-8J8
P2P5V_STBY
U15
AIC1084-2.5
I
O
VI
VO
<Part No.>
C211
C212
47uF/16V
4
TAB
0.1uF
+
S-C63MM
P3P3V_STBY_PWR
U44
AIC1084-3.3
02037-0BY
I
O
VI
VO
4
TAB
C327
C328
C329
C331
+
+
0.1uF
0.1uF
100uF/16V
10uF/MC16V
S-C63MM
P3P3V_STBY
O
4
C266
C95
C265
+
+
0.1uF
100uF/16V
10uF/MC16V
S-C63MM
P3P3V_STBY_PWR
C336
P3P3V_STBY_PWR
0.1uF
R264
R266
4.7K
4.7K
1
3
KEYPD_PWR_ON
2
U47A
SN74AHC08PWR 02037-72M
IR1
RX1
KEYPD_PWR
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Table of Contents
Troubleshooting
Chapter 4 Trouble shooting
28
Video Signal troubleshooting
29
Operation FunctionTroubleshooting
32
Power SourceTroubleshooting
33
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