Read LG 42LH250C (CHASSIS:LD91Z) Service Manual online
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
DSUB_B
002:D20
ISP_RXD
PC_L_IN
002:R18
MAX3232CDR
IC403
3
C1-
2
V+
4
C2+
1
C1+
6
V-
5
C2-
7
DOUT2
8
RIN2
9
ROUT2
10
DIN2
11
DIN1
12
ROUT1
13
RIN1
14
DOUT1
15
GND
16
VCC
DSUB_G
002:D20
COMP_R_IN
002:R17
DSUB_R
002:D20
COMP_Pr
002:D21
DBG_TX
COMP_DET
001:AA22
DBG_RX
ISP_TXD
+5V_ST
+5V_ST
COMP_Y
002:D21
+3.3V
PEJ024-01
JK401
6B
T_TERMINAL2
8
SHIELD_PLATE
7B
B_TERMINAL2
5
T_SPRING
4
R_SPRING
7A
B_TERMINAL1
6A
T_TERMINAL1
3
E_SPRING
COMP_L_IN
002:R17
PC_R_IN
002:R18
DSUB_HSYNC
002:D20
DSUB_VSYNC
002:D20
DSUB_DET
001:AA22
COMP_Pb
002:D22
+3.3V
EDID_WP
0 0 1 : A J 1 9 ; 0 0 6 : J 1 5 ; 0 0 6 : X 1 5
10K
R412
100
R416
ENKMC2838-T112
D400
A1
C
A2
+5V_ST
18pF
50V
C402
18pF
50V
C401
+5V_GENERAL
+5V_GENERAL
Fiber Optic
JST1223-001
JK403
1
GND
2
VCC
3
VINPUT
4
FIX_POLE
SIDE_USB_DP
001:AL8
SIDE_USB_DM
001:AL8
CDS3C05HDMI1
5.6V
5.6V
D425
CDS3C05HDMI1
5.6V
D426
CAT24C02WI-GT3
IC400
3
A2
2
A1
4
VSS
1
A0
5
SDA
6
SCL
7
WP
8
VCC
AMOTECH
30V
D408
AMOTECH
30V
D409
30V
D413
ADUC30S03010L_AMODIODE
30V
D414
ADUC30S03010L_AMODIODE
30V
D415
ADUC30S03010L_AMODIODE
30V
D416
ADUC30S03010L_AMODIODE
30V
D417
30V
OPT
D423
30V
OPT
D424
AMOTECH
30V
D407
AMOTECH
5.6V
D410
AMOTECH
5.6V
D411
AMOTECH
5.6V
D412
ADMC5M03200L_AMODIODE
5.6V
OPT
D418
ADMC5M03200L_AMODIODE
5.6V
OPT
OPT
D419
ADMC5M03200L_AMODIODE
5.6V
OPT
D420
AMOTECH
5.6V
OPT
D421
AMOTECH
5.6V
OPT
D422
OPT
AMOTECH
ZD403
USB DOWN STREAM
KJA-UB-4-0004
JK405
1
2
3
4
5
IR_OUT_RS232C
011:AK24
0
R461
10uF
OPT
OPT
C407
USB_CTL
0 0 1 : A J 2 6
+5V_USB_SIDE
USB_OCD
0 0 1 : A I 1 4
0 . 1 u F
C403
6.2K
R458
6.2K
R457
0
R456
0
R419
0
R435
0
R436
0
R455
0
R446
OPT
0
R440
0
R437
0 . 0 4 7 u F
25V
C430
0 . 1 u F
16V
16V
C431
0 . 1 u F
C405
0 . 1 u F
16V
16V
C406
0 . 1 u F
16V
C400
0 . 3 3 u F
16V
16V
C429
0 . 3 3 u F
16V
C428
0 . 3 3 u F
16V
C425
100
R459
100
R460
1000pF
50V
50V
C415
1000pF
50V
50V
C417
100pF
50V
50V
C422
100pF
50V
50V
C424
10K
R420
10K
R431
10K
R432
12K
R433
12K
R434
1K
R448
1K
R462
OPT
1K
R425
22
R444
22
R445
220pF
50V
50V
C427
220pF
50V
C426
4.7K
R418
4.7K
R447
47
R403
470K
R450
470K
R429
470K
R430
470K
R449
OPT
C419
OPT
C420
OPT
C418
15K
R452
15K
R451
10K
R454
10K
R453
PPJ229-01
JK400
4A
[GN]CONTACT
2A
[GN]1P_CAN
3A
[GN]O_SPRING
2B
[BL]1P_CAN
5B
[BL]C_LUG_L
2C
[RD]1P_CAN1
5C
[RD]C_LUG_L
2D
[WH]1P_CAN
5D
[WH]C_LUG_L
2E
[RD]1P_CAN2
4E
[RD]CONTACT
3E
[RD]O_SPRING
MP6211DH
IC402
3
IN_2
2
IN_1
4
EN
1
GND
5
FLAG
6
OUT_1
7
OUT_2
8
OUT_3
4.7K
R406
4.7K
R404
75
1%
R427
75
1%
1%
R426
75
1%
R428
75
1%
1%
R441
75
1%
1%
R442
75
1%
1%
R443
+5V_GENERAL
SPDIF_OUT
002:X20
1/10W
22
1%
R407
NL17SZ00DFT2G
IC401
3
GND
2
B
4
Y
1
A
5
VCC
4.7K
R402
0 . 1 u F
16V
16V
C408
0
OPT
R405
EXT_OUT_R
007:AL22
PEJ024-01
JK406
6B
T_TERMINAL2
8
SHIELD_PLATE
7B
B_TERMINAL2
5
T_SPRING
4
R_SPRING
7A
B_TERMINAL1
6A
T_TERMINAL1
3
E_SPRING
0
R421
EXT_OUT_L
007:AL21
0
R422
1uF
10V
10V
OPT
C409
1uF
10V
10V
OPT
C410
3.3K
R424
5.6V
OPT
OPT
D428
EXT_VOL-
0 0 1 : A J 1 9
1000pF
50V
50V
OPT
C416
EXT_VOL+
0 0 1 : A J 1 8
3.3K
R423
P E J 0 2 4 - 0 1
JK407
6B
T_TERMINAL2
8
SHIELD_PLATE
7B
B_TERMINAL2
5
T_SPRING
4
R_SPRING
7A
B_TERMINAL1
6A
T_TERMINAL1
3
E_SPRING
1000pF
50V
50V
OPT
C411
5.6V
OPT
D427
5.1V
ZD404
OPT
5V_RJP_CTRL_0
001:AA18
+12V_RJP
5.1V
ZD407
OPT
5.1V
ZD405
OPT
5V_RJP_CTRL_3
001:AA22
5.1V
ZD406
OPT
5V_RJP_CTRL_2
001:AA21
5V_RJP_CTRL_1
001:AA21
RJP_DET
008:AF15
MJ-657PT-8-SD
JK409
1
2
3
4
5
6
7
8
9
1K
R465
+3.3V
BSS83
Q401
+3.3V
5V_RJP_CTRL_1
BSS83
Q404
5V_RJP_CTRL_2
5V_RJP_CTRL_3
BSS83
Q402
RJP_CTRL_2
RJP_CTRL_1
0 . 1 u F
C404
BSS83
Q403
RJP_CTRL_0
RJP_CTRL_3
5V_RJP_CTRL_0
+5V_GENERAL
5V_RJP_CTRL_3
5V_RJP_CTRL_1
5V_RJP_CTRL_0
5V_RJP_CTRL_2
RJP_CTRL_1
RJP_CTRL_3
RJP_CTRL_2
RJP_CTRL_0
0
R438
OPT
0
R439
OPT
0
R463
OPT
0
R464
OPT
4.7K
R413
4.7K
R414
4.7K
R417
4.7K
R415
SPG07150941-1
P400
1
RED
2
GREEN
3
BLUE
4
GND_1
5
DDC_GND
6
RED_GND
7
GREEN_GND
8
BLUE_GND
9
NC
10
SYNC_GND
11
GND_2
12
DDC_DATA
13
H_SYNC
14
V_SYNC
15
DDC_CLOCK
16
SHILED
SPG07150941
P401
1
2
3
4
5
6
7
8
9
10
10K
R411
10K
R409
10K
R401
10K
R410
COMPONENT
PC AUDIO
RS232C
4 1 1
INTERFACE
PC - RGB
SPDIF OPTIC JACK
SIDE USB
EXT_SPEAKER
EXT_SPK_CONTROL
RJP
2 0 0 9 . 0 6 . 0 9
EAX61353501
COMMERCIAL_LITE LH250
LEVEL SHIFT
ERFACE
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