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42LDF30UB
Service manual
Hitachi 42LDF30UB Service Manual page 89
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A/D DIMMING SELECTION
R339
1
4K7
2
R340
5V_VCC
1
4K7
2
CN117
R341
30V_VCC
1
2
1
2
3V3_VCC
4K7
24V_VCC
3
4
24V_VCC
6V3
6V3
5
6
100U
100U
7
8
2
1
1
2
C507
C506
5V_VCC
9
10
3V3_VCC
TP199
1
TP197
11
12
1
TP198
3V3_VCC
1
3V3_LPW
3V3_LPW
13
14
3V3_LPW
33V_VCC
5V_STBY
15
16
TP202
1
12V_AUDIO
17
18
12V_VCC
1
TP201
TP200
19
20
1
21
22
23
24
25
26
27
28
17PW26 CONNECTOR
5V_VCC
3V3_VCC
20
19
5V_VCC
3V3_VCC
18
17
3V3_LPW
16
15
3V3_LPW
33V_VCC
14
13
5V_STBY
12V_AUDIO
12
11
12V_VCC
10
9
8
7
6
5
4
3
2
1
CN126
17IPS15 CONNECT OR
SHORT CCT PROTECTION
PROTECT_PANEL
3
R708
Q137
2
PANEL_VCC
2
33K
1
BC848B
1
10K
1
2
3
R571
5V_TUN
3V3_VCC
3V3_STBY
R565
2
10K
1
3
5V_VCC
1
R564
Q151
1
10K
2
2
3
BC858B
3
3
R563
Q136
2
1
2
10K
B C848B
1
No. 0252
W/IDTV Option
C358
10N
16V
S211
1
2
12V_VCC
C457
C568
C567
1
2
2
470U
22U
22U
16V
1
1
2
16V
16V
NC
NC
W STBY uC
S209
1
2
3V3_STBY
D144
1
2
S208
1
2
3V3_STBY
SS33
WO STBY uC
S210
1
2
3V3_STBY
VINB
SW
4
MP2112
C578
C576
2
2
VINA
GND
22U
22U
5
1
16V
1
16V
U144
EN
FB
NC
NC
6
R702
C535
1
33K
2
1
2
1N
50V
PAULO DECOUPLING
CAPACITORS
F146
1
2
3V3_STBY
330R
R345
DIMMING
1
4K7
2
R344
BACKLIGHT_ON/OFF
1
4K7
2
R343
1
2
STBY_ON/OFF
F147
4K7
1
2
R342
1V26_STBY
330R
1
2
STBY_ON/OFF_NOT
4K7
MECH_SWITCH
F145
1
2
3V3_STBY
330R
R706
8V_VCC
2
33K
1
F169
10K
1
2
3V3_VCC
1
2
60R
R569
F170
1
2
60R
F171
5V_VCC
1
2
60R
F172
1
2
12V_VCC
60R
R705
2
1
12V_VCC
33K
10K
1
2
R568
R570
1
10K
2
33K
24V_VCC
2
1
R707
33K
12V_AUDIO
2
1
3
R709
R575
2
10K
1
2
PANEL_VCC_ON/OFF
C309
2
1
100N
1
10V
C519
1
2
100N
10V
U137
C599
R244
MP1583
2
1
3K9
2
1
8
1
2
1
BS
SS
5N6
2
7
C518
IN
EN
50V
3
6
SW
COMP
4
5
1
2
GND
FB
100N
NC
R567
S187
1
2
1
24K9
2
L106
1
2
2V6_VCC
15U
C565
C566
2
2
22U
22U
1
16V
16V
1
NC
L110
TP142
1
1
2
1V26_STBY
3
4U7
C575
C579
2
2
22U
22U
2
1
16V
1
16V
NC
1
R124
1
180K
2
2
S134
1
3
12V_VCC
IN
C470
GND
1
47U
2
16V
VDDP
C307
2
100N
1
10V
VDDC
C308
2
100N
1
10V
AVDD_33
C306
2
100N
1
10V
F223
1
2
3V3_STBY
60R
F222
1
2
3V3_VCC
60R
PANEL_VCC
5V_VCC
R205
1
47R
2
PANEL SUPPLY SWITCH
Q139
BC848B
R765
2
1
STBY_ON/OFF
4K7
C603
100N
10V
MB34 Power
U136
C357
MP1583
2
10N
1
1
16V
BS
SS
S212
2
1
2
5V_STBY
IN
EN
3
C456
SW
COMP
C569
C580
1
4
2
2
470U
GND
FB
22U
22U
1
1
16V
2
16V
16V
NC
NC
D143
L105
1
2
1
2
15U
SS33
C577
2
22U
1
VFD
16V
3V3_STBY
U122
LM1117
TP143
1
2
8V_VCC
OUT
VOUT
1
4
VFD OPTION
R378
R476
1
10K
2
1
1K
2
R338
STBY_ON/OFF_NOT
2
4K7
1
C310
2
100N
1
10V
S213
1
2
VINB
SW
5V_VCC
4
3
MP2112
C574
C573
2
2
22U
22U
VINA
GND
5
2
1
1
16V
16V
U145
EN
FB
NC
NC
6
1
R701
NC
C536
1
2
33K
4K7
STBY_ON/OFF
2
1
1
2
R334
R703
1N
1
33K
2
50V
U121
LM1117
TP147
1
3
2
IN
OUT
1V8_SUPPLY
GND
VOUT
C543
1
100U
1
4
16V
2
47R
100R
R477
1K
1
10K
2
1
2
R410
0R
F224
1
TP194
1
2
60R
1V8_SUPPLY
1V8_VCC
3
Q156
2
BC848B
2
1
1
C516
1
2
100N
C544
R335
10V
1
2
4K7
8
1
2
4N7
7
C517
50V
6
5
1
2
100N
NC
R572
S186
1
2
1
2
14K
3V3_STBY
C570
2
22U
1
16V
NC
3V3_VCC
3
Q138
2
BC848B
1
L103
TP146
1
1
2
1V0_VCC
4U7
C572
C571
2
2
22U
22U
1
1
16V
16V
NC
S185
1
2
R250
1
2
270K
F103
1
2
24V_VCC
30V_VCC
600R
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42ldf30u
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