LG 42LY750H Service Manual page 32

FROM LIPS & POWER B/D
+3.5V_ST
+3.5V_ST
MMBT3906(NXP)
Q2401
R2461
10K
R2408
OPT
1 3
RL_ON R2401
10K
2
10K
R2453
10K
OPT
PWR ON
L2402
+3.5V_ST
UBW2012-121F
C2406
ZD2403
0.1uF
5V
16V
OPT
+12V
L2401
L/DIM0_MOSI
UBW2012-121F
C2401
0.1uF
50V
Power_DET(12V)
+12V +3.5V_ST
R2417
100K
PD_12V OPT RESET_IC_ROHM
R2410 R2413
IC2402
2.7K 0
1% 5% BD48K28G
VDD
3
1
C2411
PD_12V
0.1uF GND
R2409
16V
1.2K
1%
12V-->3.58V
ST_3.5V-->3.5V
24V-->3.48V OPT
+24V R2416
+3.5V_ST
100K
PD_3.5V IC2401
PD_24V
R2429
R2412 BD48K28G
0
8.2K
5%
1%
VDD
3 2
1
PD_24V C2410
R2411 GND
0.1uF
1.5K 16V
1%
OPT
MTK CORE 1.2V
+12V
L2404
L2400 IC2400
2uH
AOZ1038PI [EP]LX
BLM18PG121SN1D
*NOTE 17
PGND NC_2
1 8
OPT
Placed on SMD-TOP R24000
VIN NC_1
2 7
C2405
AGND EN
4700pF
3 6
C2400 C2402 C2403 R2402
10uF 10uF 0.1uF 50V
3.3K
FB COMP
16V 16V 16V 4 5
OPT
R2403
POWER_ON/OFF1
10K
C2404
0.1uF
16V
Vout=0.8*(1+R1/R2)
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
Copyright © 2014 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
+3.3V_NORMAL
R2420
1K
R2425
POWER_24P 100 OPT INV_CTL
P2400
R2426
SMAW200-H24S5
10K
INV ON
1 1 2 2
3.5V PDIM#1
3 3 4 4
PWM_DIM1 +24V
3.5V 3.5V 3.5V
5 5 6 6
L2403
GND PDIM#2 PDIM#2
7 7 8 8 UBW2012-121F
PWM_DIM2
24V 24V
9 9 10 10
GND GND
11 11 12 12
C2413
12V 12V
13 13 14 14 0.1uF
12V 24V 50V
15 15 16 16
GND GND
17 17 18 18
GND GND
19 20
GND L/DIMO_VS
21 22
19
L/DIM0_SCLK
23 24
25
SMAW200-H18S5
P2401
POWER_18P
IC2402-*1
APX803D29
Diodes_NEW
VCC RESET
3 2
1
GND
IC2401-*1
+3.5V_ST APX803D29
Diodes_NEW
R2421
VCC RESET
3 2
10K
OPT
1
GND
R2419
POWER_DET
VOUT 100
2
C2412
0.1uF
16V
not to RESET at 8kV ESD
R2418
100
VOUT
OPT
OPT
+1.2V_MTK_CORE
C2407 C2408 C2409 C2414 C2441
10uF 10uF 10uF 10uF 3300pF
10V 10V 10V 10V 50V
OPT
R1
R2
POWER TP POINT JIG POINT for GND
POWER_ON/OFF1
POWER_ON/OFF2_1
POWER_ON/OFF2_2
POWER_ON/OFF2_3
POWER_ON/OFF2_4
+5V_Normal
+12V
L2407
BLM18PG121SN1D
C2415
IC2404
10uF
16V
TPS54327DDAR [EP]GND
POWER_ON/OFF2_3
R2435
10K
EN VIN
1 8
C24001
0.1uF
R1 1% 16V
VFB VBST
2 7
R2415
56K VREG5 SW
3 6
C2416
100pF
50V
SS GND
3A
4 5
R2439
R2 10K C2417 C2428
1uF 3300pF
1%
10V 50V
DDR MAIN 1.5V
POWER_ON/OFF2_1
C2420
0.1uF
+3.5V_ST
16V C2423
0.1uF
16V
L2405
BLM18PG121SN1D
L2406
3.6uH
VIN_1 PH_3
1 12
THERMAL
NR8040T3R6N
VIN_2 PH_2
2 11
C2448 C2418 C2419 17
C2424 C2425 C2446
10uF 10uF 0.1uF
GND_1 PH_1
3 IC2403 10 10uF 10uF 10uF
10V 10V 16V
TPS54319TRE
C2422 10V 10V 10V
GND_2 SS/TR
4 3A 9
0.01uF
50V
R2432
1/16W 330K 5%
R2431 C2421
4700pF
15K
1/16W 5% 50V
3A
$ 0.145
Vout=0.827*(1+R1/R2)=1.521V
PANEL_POWER
+12V
C2432 C2433
R2442
0.01uF 0.1uF
33K
50V 50V
R2441
5.6K
C
R2437
10K B Q2406
PANEL_CTL
MMBT3904(NXP)
R2460
E
10K
+5V_NORMAL
C2429
0.1uF L2409
16V
3.6uH
NR8040T3R6N
C2430
22uF
10V
+3.3V_NORMAL
+12V
L2410
BLM18PG121SN1D
[EP]PGND
TPS54425PWPR
VIN2
14
+1.5V_DDR
VIN1
13
C2431
10uF
16V
VBST
12
SW2
11
C2434
C2427 0.1uF
C2447
0.1uF 50V
10uF SW1
16V 10
10V
PGND2
C2426 9
100pF
50V
PGND1
8
R1
R2433
56K R2
1/16W
1%
Vout=(0.763+0.0017*Vout.set)*(1+R1/R2)
TYP 1450mA
PANEL_VCC
Q2407
PMV48XP
C2435
C2440
4.7uF 1uF
R2451 R2452 C2443
G
50V 25V 2K 2K 0.1uF
OPT 1/8W 1/8W
50V
MAX 3.4 A
IC2405
+3.3V_NORMAL
VO
1 R2
R2428
VFB
10K
2
1%
VREG5
3
C2438
4A
1uF
SS 10V
4
R1
C2445
GND R2427
5 33K 22pF
R2407 C2439 1%
50V
3300pF
100K
PG
50V
6
EN
R2414 10K
7
C2437
POWER_ON/OFF2_2
0.1uF +3.3V_NORMAL
L2411
2uH
C2442
C2444
22uF 22uF
ZD2400
10V 10V
xxLY750H-ZA 2013.12.27
MID_POWER
24
LGE Internal Use Only