LG 42LT777H Service Manual page 32
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Also See for 42LT777H:
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FROM LIPS & POWER B/D
+3.5V_ST
RT1P141C-T112
Q2401
+3.5V_ST
R2463
0
NORMAL_EXCEPT_32
R2461
OPT
R2408
P2400
C
10K
FW20020-24S
4.7K
RL_ON
B
Q2402
MMBT3904(NXP)
R2453
R2401
10K
10K
E
PWR ON
OPT
L2402-*1
L2402
UBW2012-121F
+3.5V_ST
CIS21J121
3.5V
3.5V
SHENCHEN_NEW
SS_OLD
C2406
0.1uF
L2402-*2
16V
MLB-201209-0120P-N2
MAG_NEW
+12V
SS_OLD
L2401
GND/P.DIM2
CIS21J121
PWM_DIM2
L2401-*1
UBW2012-121F
C2401
0.1uF
50V
SHENCHEN_NEW
L2401-*2
MLB-201209-0120P-N2
#16/#20/#23
LD - GND OR USE
MAG_NEW
LE(N.L.D.) - OPEN
LE(L.D.) - USE
Power_DET
+12V
+3.5V_ST
PD_12V
OPT
Diodes_NEW
R2410
R2413
IC2402-*1
2.7K
0
1%
5%
NCP803SN293
APX803D29
Onsemi_OLD
RESET
VCC
VCC
2
3
3
1
C2411
PD_12V
0.1uF
GND
R2409
16V
1.2K
1%
On-semi
+24V
+3.5V_ST
Diodes_NEW
IC2401-*1
APX803D29
PD_3.5V
PD_24V
R2429
R2412
NCP803SN293
0
8.2K
RESET
VCC
5%
2
3
1%
VCC
1
3
GND
PD_24V
C2410
R2411
0.1uF
1.5K
16V
1%
+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
10K
C2404
R2454
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.
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.
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
L2403-*1
L2403-*2
UBW2012-121F
MLB-201209-0120P-N2
SHENCHEN_NEW
MAG_NEW
NORMAL_32
P2402
+24V
FM20020-24
L2403
24V
1
1
1
2
2
2
CIS21J121
24V
24V
3
3
3
4
4
4
GND
GND
5
5
5
6
6
6
SS_OLD
C2413
GND
GND
7
7
7
8
8
8
0.1uF
3.5V
50V
9
9
9
10
10
10
3.5V
11
11
11
12
12
12
GND
GND
13
13
13
14
14
14
GND
GND/V-sync
15
15
15
16
16
16
R2423
0
R2425
L/DIM0_VS
100
12V
INV ON
POWER_16_VSYNC
17
17
17
18
18
18
12V
A.DIM
19
19
19
20
20
20
A_DIM
R2426
12V
P.DIM1
R2462
0
21
21
21
22
22
22
PWM_DIM1
10K
Err OUT
NON_37_LGD
23
23
23
24
24
24
SLIM_32~55
25
25
SMAW200-H24S2
+3.3V_NORMAL
P2401
R2424
4.7K
OPT
ERROR_OUT
R2417
+3.5V_ST
100K
R2421
10K
IC2402
OPT
R2419
POWER_DET
100
RESET
2
1
GND
C2412
0.1uF
16V
R2416
100K
not to RESET at 8kV ESD
OPT
IC2401
R2418
100
RESET
2
1
OPT
24V-->3.48V
GND
12V-->3.58V
ST_3.5V-->3.5V
+1.2V_MTK_CORE
C2407
C2408
C2409
C2414
C2441
10uF
10uF
10uF
10uF
3300pF
10V
10V
10V
10V
50V
OPT
R1
+3.5V_ST
10K
R2
POWER_ON/OFF1
INV_CTL
+5V_Normal
+12V
L2407
BLM18PG121SN1D
+3.5V_ST
C2415
10uF
IC2404
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
+3.5V_ST
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
10uF
10uF
0.1uF
GND_1
PH_1
3
IC2403
10
10V
10V
16V
10uF
10uF
TPS54319TRE
C2422
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
PANEL_CTL
FOR LPB Download
[To LED DRIVER]
FOR LPB MODEL
P2403
12507WR-08L
1
+5V_NORMAL
2
3
4
JP2411
5
6
7
C2429
0.1uF
L2409
16V
3.6uH
8
NR8040T3R6N
9
C2430
22uF
10V
+3.5V_ST
L2412
BLM18PG121SN1D
+12V
+3.3V_NORMAL
L2410
BLM18PG121SN1D
[EP]PGND
+1.5V_DDR
C2431
10uF
16V
C2427
C2446
C2447
0.1uF
C2434
10uF
10uF
16V
0.1uF
10V
10V
50V
C2426
100pF
50V
R1
R2433
56K
R2
1/16W
1%
Vout=(0.763+0.0017*Vout.set)*(1+R1/R2)
TYP 1450mA
PANEL_VCC
Q2407
AO3407A
C2435
C2440
4.7uF
1uF
G
25V
50V
C2443
OPT
0.1uF
50V
C
R2437
10K
B
Q2406
MMBT3904(NXP)
R2460
E
10K
FOR LPB MODEL
R2458
33
I2C_SCL5
I2C_SDA5
FOR LPB MODEL
R2459
33
+3.3V_TU_IN
POWER_ON/OFF1
POWER_ON/OFF2_1
C2436
POWER_ON/OFF2_2
0.1uF
POWER_ON/OFF2_3
16V
POWER_ON/OFF2_4
MAX
3.4 A
IC2405
TPS54425PWPR
+3.3V_NORMAL
VIN2
VO
14
1
R2
R2428
VIN1
VFB
10K
13
2
1%
VBST
VREG5
12
3
C2438
4A
1uF
SW2
SS
10V
11
4
R1
C2445
SW1
GND
R2427
10
5
+3.5V_ST
33K
22pF
R2407
C2439
1%
50V
3300pF
100K
PGND2
PG
50V
9
6
PGND1
EN
R2414
10K
8
7
C2437
POWER_ON/OFF2_2
0.1uF
+3.3V_NORMAL
L2411
2uH
C2442
C2444
22uF
22uF
10V
10V
xxLT760H-UA
2011.09.29
MID_POWER
24
LGE Internal Use Only
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