LG 40LX560H Service Manual page 27

POWER
FROM POWER B/D 13.2V
TR_KEC
Q401-*1
2N3906S-RTK
+3.5V_ST
TR_NXP
Q401
MMBT3906(NXP)
1 3
OPT
TR_KEC
R412
Q400-*1
R406 2 33K
2N3904S
10K
+3.5V_ST C
R404
B 4.7K
R400
TR_NXP
10K E C
R402 Q400
10K MMBT3904(NXP)
B
RL_ON P401
SMAW200-H12S5K(BK)(LTR)
R401 E
10K
OPT
PWR_ON
1
TVS_SEMTECH GND
+3.3V_Normal 3
ZD404
D13.2V
5
5V
+3.5V_ST
A13.2V
7
R420
GND
1K R419 9
100
DRV_ON
R426 11
10K C
R425
TVS_KEC
10K TR_NXP
B ZD404-*1 13
INV_CTL Q402
MMBT3904(NXP)
TR_KEC
E
Q402-*1
2N3904S
C
B
E
+13.2V to +3.5V_STANDBY
+13.2V
L412
BLM18PG121SN1D
C438 C439
10uF 0.1uF
25V 25V
IC405
BD9D321EFJ
R1 R470
10K
EN
R468 R469
1 8
6.8K 68K
R475
1/16W 1/16W
30K
1% 1% FB
OPT
2 7
C440
100pF VREG
3 6
50V
SS
3A
4 5
R2
R471 C441 C442
22K
1uF 2200pF
1/16W 10V 50V
1%
Vout=0.765*(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 2015 LG Electronics Inc. All rights reserved.
Only for training and service purposes
+13.2V POWER_DET
+13.2V
R430
14K
1%
C415 R431
5.6K
0.1uF
1%
25V
PWM1_CAP
R467-*1
1000pF
50V
PWM1
PWM1_Pulldown_R
+13.2V A13.2V
R467
1K
PDIM#2
2
D13.2V
4 L403
D13.2V MLB-201209-0120P-N2
6
A13.2V OPT
8 C402
C433
GND OPT 0.1uF
10
L414 4.7uF
25V
PDIM#1
12 50V
L415
MLB-201209-0120P-N2
PWM_DIM C446
0.1uF
R424 25V
3.9K
+3.5V_Normal to +1.5V_DDR
+3.3V_Normal
+3.5V_ST
IC404
L409
AZ1117EH-ADJTRG1
BLM18PG121SN1D
IN
ADJ/GND
C426
10uF
10V
1.3A
TVS_SEMTECH
ZD405
[EP] 5V
VIN Vout=1.25*(1+R2/R1)+Iadj*R2
C443
TVS_KEC
0.1uF
ZD405-*1
16V
BOOT
L413
2uH
SW
C444 C445
GND
22uF 22uF
10V 10V
+13.2V to PANEL_VCC
R435
+3.5V_ST +13.2V
100K
RESET_IC_KEC OPT
IC401
R438
KIC7529M2 4.7K L408
UBW2012-121F
R454
120OHM
100
VCC OUT
3 2
POWER_DET
1 OPT
C422
C425
GND 0.1uF
0.1uF
16V
25V
POWER_DET_RESET
IC401-*1
RESET_IC_DIODES
APX803E29
VCC RESET
3 2 PANEL_CTL
1
R441
GND 10K
+5V_Normal & +1.10V_VDDC
+1.5V_DDR
L411
CB2012PK501T
OUT
OPT
R449 OPT
R453 ZD403
R1
1K 0 2.5V
ZD406
1/16W
5.1v
1%
C431
10uF
R450 10V
200
R2
1/16W
1%
+3.3V_Normal
4700pF
Check the pull down
when AC Power On with HDD
+3.5V_ST to +3.3V_Normal
PANEL_VCC
Q405
SSM3J332R
NON_60_SHARP
R451 R452
R445 C427
5.6K 5.6K
33K 0.22uF
25V
60_SHARP
R446 C427-*1
120K 0.1uF
50V
C
R442 C
TR_NXP
TR_KEC
10K
B Q403
B Q403-*1
MMBT3904(NXP)
2N3904S
E
E
POWER_ON/OFF_1
+13.2V
L404
CB2012PK501T
C405 C406
C407
10uF 10uF 1uF
25V
25V 10V
OPT
C408
+3.3V_Normal
2200pF
50V
OPT
R403 R405 SS2
C409 1
10K 10K
2200pF
THERMAL
50V EN1
25
2
EN2
3 IC400
R409
91K
OPT OPT OPT OPT ROSC/SYNC SN1406035RGER
4
C403 R473 C404 R474
+3.3V_Normal
30K 4700pF 30K SW_EN
5
50V 50V OPT
R407 NFAULT
4.7K 6
USB1_CTL
+5V_Normal
USB1_CTL_Pull_Down
R472
3.3K
R408
100K
USB1_OCD
+5V_USB
FET_AOS
Q406-*1
AO3435
+3.5V_ST +3.3V_Normal
FET_TOSHIBA
Q406
L410
SSM3J332R
BLM18PG121SN1D
C428 C429 C430
R443 R447
ZD402
2.2uF 0.1uF 22uF
10K 22K
5V
10V 16V 10V
TVS_SEMTECH
R448 TVS_KEC
2.2K
ZD402-*1
C
C
R444
TR_NXP
TR_KEC
10K
B Q404
B Q404-*1
MMBT3904(NXP)
2N3904S
E
E
Vout=0.6(R1/R2)+0.6
+1.10V_VDDC
L405
4.7uH
R1
OPT
OPT
OPT
C411 OPT C412 C413 C414
R411
82pF ZD407 ZD401 10uF 22uF 22uF
4.7K
5.1v
2.5V
1% 50V 6.3V 10V 10V
R2
R413
5.1K
1%
C416
22pF
50V
C417
R414 3300pF
10K 50V
COMP1 R415
18 0
5%
FB1
17
R2
AGND R416
5.1K
16
R422
15K 1%
RSET
15
FB2
C419
14
22pF
50V
COMP2
R417
13
C418
39K
47pF
C420
1%
R418 3300pF 50V
20K 50V
R1 +5V_Normal
C421 L406
0.047uF
4.7uH
25V
C423 C424
22uF 22uF
+5V_Normal
16V 16V
C432
Vout=0.6(R1/R2)+0.6
1uF
16V
L14_CA 2014/12/03
POWER 4
LGE Internal Use Only