LG 55LW9800 Service Manual page 53

VLCD_POWER
[GPM Block]
R401
R402
IC400
VGH VGH_S
(+27V) (+27V) KIA3820FK
VGH VFLK
1 8
VGH_M GND R403
2 7
R400 15K RE VDPM
3 6
1%
CE VDD
4 5
C400
56pF
50V
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.
[PMIC Block]
VLCD_POWER
(+12V)
R451
0
1/10W
Place Bottom
VL
(+5V)
C410 C414 C418 C420
10uF 10uF 10uF 10uF
25V 25V 25V 25V
R408
OPT OPT
150K
1%
TCOMP
VLCD_POWER
(+12V)
TH400 R410
47k-ohm
120K
R452
0
1/10W
C415
VL
1uF
(+5V)
25V
TCOMP
TCOMP
C409 AGND
1uF
AVIN
HVDD C417
25V
0.1uF
(+8.4V)
PVINB3
L401 50V
10uH BST3
3.1A
SWB3
R409 0
OUT3
1/10W
C404 C405 C406
PGND3
R405 R412 0
2.7K 10uF 10uF 10uF
C416
25V 25V 25V
0.01uF
OPT
50V
Place Bottom
C422
120pF
50V
(+12V)
R453
0
1/10W
L400 D402
22uH
Place Bottom SMAB34
40V
C401 C402 C403 C421
C419
10uF 10uF 10uF 10uF
0.1uF
25V 25V 25V 25V
50V
OPT
R411 C413
2.2 1000pF
C407
0.47uF
50V
VDD_LCM C408
0.47uF
(+16.8V)
50V
D400 D401
MMBT3906(NXP)
R454
1N4148W 1N4148W
10
1/10W 100V 100V
C411
R413
to prevent inrush current 0.1uF
680
50V
C412
0.1uF
50V
VGH_M
33
GSC
VGH
33
FLK
VCC_LCM VDD_LCM
(+3.3V) (+16.8V)
R406
OPT
0
1/10W
R404 33
DPM
R407
OPT
L402
22uH
R427 0
1/10W
2.2A
D403
C441
C432 C435 C438
SMAB34
40V 1uF 22uF 22uF 0.1uF
25V 10V 10V 50V
C427
0.1uF VCORE
50V
(+1.0V)
L403
LQM2HPN2R2MG0L
2.2uH
R450 0
1/10W
C458 C457
10uF 10uF
25V 25V
VCC_LCM
EN1 1 30 VLOGIC2 (+3.3V)
SDA
2 29 R423 33
THERMAL I2C_SDA
VL SCL
3 28 R424 33 R448
41 I2C_SCL
10K
A0
4 27
RST
5 IC401 26 R449 33
TCON_RST
NC_3 VGH_S
6 MAX17139 25
CTRLN (+27V) B
7 24
NC_2
8 23
VGL
9 22
VGL_FB
VGH
10 21
VCC_LCM
(+3.3V)
R426 680
R455
10K
C424
0.1uF
50V
R456
10K
OPT
R414
33K
C425
Place Bottom
2200pF
50V R429
1/10W
C431 C433 C434 C439 C442
10uF 10uF 10uF 10uF 10uF
25V 25V 25V 25V 25V
OPT OPT
C423 C426 C429
10uF 10uF 10uF
25V 25V 25V
OPT OPT
Place Bottom
VGH_S
(+27V)
Q400
R415 0
1/10W
C428 C430 R416 R417
4.7uF 4.7uF 18K 18K
1/10W 1/10W
50V 50V
VCC_LCM
(+3.3V)
R425
I2C_SDA
R418
10K
C437
1uF
10V
VDD_LCM
(+16.8V)
R419 0
R420 22
C436 C440
4.7uF 4.7uF
50V 50V
VCC_LCM
(+3.3V)
R430
5.1K
VGL
(-5V)
D404 D405
1N4148W 1N4148W
R440 0
100V 100V 1/10W
C
R435
C450 C451
C444 C447 0 R442
Q401
0.22uF 10uF 10uF 3.6K
0.22uF
2SC3052 50V 1/10W
25V 25V
50V
OPT
E
VGL_FB
VCC_LCM
C445 C448 R436
(+3.3V)
0.22uF 2K
0.22uF
50V 1/8W
50V 1%
OPT OPT
R437 0
OPT
C449
0.1uF
50V
OPT
VDD_LCM
(+16.8V)
0
R432
9.1K
1/8W
HVDD
[P-Gamma Block]
(+8.4V)
C446
1uF
25V
V14
V13
VCC_LCM
(+3.3V)
SDA GM6
33 1 15
V12
THERMAL
A0 GM5
2 14
21 V10
DVDD GM4
3 13
IC402 V4
VCOM_GND GM3
BUF08630
4 12
V3
VCOM_OUT 0xEA GM2
5 11
V2
VDD_LCM
V1
(+16.8V)
R433
0
R438
R431
10K
R439
C443
0.1uF
50V
HVDD
(+8.4V)
C456
1uF
25V
V18
V17
SDA GM6
R443 33 1 15
I2C_SDA V16
THERMAL
A0 GM5
2 14
21 V15
DVDD GM4
3 13
IC403 V9
C453 VCOM_GND GM3
R441 BUF08630
4 12
V7
10K 1uF
10V VCOM_OUT 0xE8 GM2
5 11
V6
V5
R446 0
VCOMOUT
R447 0
VCOMFB
0
R445
10K
22
C452 C454 C455
4.7uF 4.7uF 0.1uF
50V 50V 50V
LG1121 GP3 2010. 10. 20
T-Con Power/P-Gamma/GPM 4 7