LG 42LY750H Service Manual page 30

FROM LIPS & POWER B/D
+3.5V_ST
RT1P141C-T112
Q2401
+3.5V_ST
R2461
C
10K
RL_ON
B Q2402
MMBT3904(NXP)
R2401
10K
E PWR ON
3.5V
3.5V
L2402
+3.5V_ST
UBW2012-121F
ZD2403
C2406
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 VOUT
3 2
1
C2411
PD_12V
0.1uF GND
R2409
16V
1.2K
1%
OPT
+24V R2416
+3.5V_ST
100K
OPT
PD_3.5V IC2401
PD_24V
R2429
R2412 BD48K28G
0
8.2K
5%
1%
VDD VOUT
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
+3.5V_ST
R2403
10K R2454
C2404
10K
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 right reserved.
Only for training and service purposes
+3.3V_NORMAL
R2420
1K
R2425
OPT INV_CTL
POWER_24P 100
P2400
R2426
SMAW200-H24S5
10K
INV ON
1 1 2 2
PDIM#1
3 3 4 4 PWM_DIM1 +24V
3.5V 3.5V
5 5 6 6
L2403
GND PDIM#2 PDIM#2
7 7 8 8 PWM_DIM2 UBW2012-121F
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
RESET_IC_DIODES RESET_IC_DIODES
IC2401-*1 IC2402-*1
APX803D29 APX803D29
VCC RESET VCC RESET
3 2 3 2
1 1
GND GND
+3.5V_ST
R2421
10K
OPT
R2419
POWER_DET
100
C2412
0.1uF
16V
not to RESET at 8kV ESD
24V-->3.48V
12V-->3.58V
ST_3.5V-->3.5V
R2418
100
OPT
+1.2V_MTK_CORE
C2407 C2408 C2409 C2414 C2441
10uF 10uF 10uF 10uF 3300pF
10V 10V 10V 10V 50V
OPT
R1
R2
POWER_ON/OFF1
+5V_Normal
+12V
L2407
BLM18PG121SN1D
+3.5V_ST
100K_LY75
C2415 10K_OLD
IC2404
10uF R2457 R2457-*1
16V 100K
10K TPS54327DDAR [EP]GND
POWER_ON/OFF2_3
R2435
10K
EN VIN
1 8
C24001
0.1uF
R1 1% 16V C2429
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
+3.5V_ST
10K_OLD 100K_LY75
R2455 R2455-*1
10K 100K
POWER_ON/OFF2_1
C2420
0.1uF
+3.5V_ST
C2423
16V
0.1uF
16V
L2405
BLM18PG121SN1D
L2406
3.6uH
VIN_1 PH_3
1 12
THERMAL
VIN_2 PH_2 NR8040T3R6N
2 11
17
C2448 C2418 C2419
C2424 C2425 C2446
10uF 10uF 0.1uF
GND_1 PH_1
3 IC2403 10
10V 10V 16V 10uF 10uF 10uF
TPS54319TRE
C2422 10V 10V 10V
GND_2 SS/TR
4 3A 9
0.01uF
50V
R2432
1/16W 330K 5%
R2431 C2421
15K 4700pF
1/16W 5% 50V
3A
$ 0.145
Vout=0.827*(1+R1/R2)=1.521V
PANEL_POWER
+12V
L2408
BLM18SG121TN1D
C2432 C2433
0.01uF 0.1uF
50V 50V
B
PANEL_CTL
+5V_NORMAL
POWER TP POINT
POWER_ON/OFF1
POWER_ON/OFF2_1
POWER_ON/OFF2_2
POWER_ON/OFF2_3
POWER_ON/OFF2_4
0.1uF L2409
16V
3.6uH
NR8040T3R6N
C2430
22uF
10V
+3.3V_NORMAL
+12V
L2410
BLM18PG121SN1D
[EP]PGND
VIN2
VIN1
+1.5V_DDR C2431
10uF
16V
VBST
C2434
0.1uF
50V
C2427
C2447
0.1uF
10uF
16V
10V
PGND2
C2426
100pF PGND1
50V
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
1uF
4.7uF
G
25V
50V
C2443
OPT
0.1uF
50V
C
Q2406
RT1N141C-T112-1
E
JIG POINT for GND
MAX 3.4 A
IC2405
+3.3V_NORMAL
TPS54425PWPR
VO
14 1
R2
R2428
VFB
10K
13 2
1%
VREG5
12 3
C2438
4A
1uF
SW2 SS 10V
11 4
R1
C2445
SW1 GND R2427
22pF
10 5 +3.5V_ST 33K
R2407
C2439 1% 50V
3300pF
100K
100K_LY75
PG 10K_OLD
50V
9 6
R2456-*1
R2456
100K
10K
EN
R2414 10K
8 7
C2437 POWER_ON/OFF2_2
0.1uF
+3.3V_NORMAL
L2411
2uH
C2442 C2444
22uF 22uF
ZD2400
10V 10V
xxLY750H-UA 2013.12.24
MID_POWER 5 21
LGE Internal Use Only