LG 32LN549C Service Manual page 24

FROM LIPS & POWER B/D
+3.5V_ST
MMBT3906(NXP)
Q402
+3.5V_ST
1 3
R413
2 OPT
10K
R414
33K
R410
R406
OPT
4.7K
10K
R409 C
10K
RL_ON
B Q401
MMBT3904(NXP)
R407
E
10K
D401 5V OPT
SMAW200-H18S1
CIC21J501NE
PWR ON
1
L402 L403
3.5V
+3.5V_ST 3
3.5V
C403 0 . 1 u F CIC21J501NE 5
GND
16V 7
L405
24V
+24V 9
GND
C405 0 . 1 u F MLB-201209-0120P-N2 11
12V
50V 13
L413
12V
+12V 15
GND
C407 0 . 1 u F 17
MLB-201209-0120P-N2
16V
C401
68uF
35V
OPT
+5V_Normal
Vout=0.8*(1+R1/R2)
&
L404
3.6uH
+5V_USB_1
C410
C411
0 . 0 4 7 u F
22uF
25V
16V
R408
0
+12V
CHANGE TO
16V/X5R
C404
PGND
10uF
16V
IC401
VIN
TPS65281RGV
C406
4 . 7 u F 10V
R405
100K
V7V
EN
[ E P ]
R412
R411 20K
C408 2K
100pF
50V
C409
OPT
3300pF
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.
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
+12V
L409
120
CIS21J121
+3.3V_Normal
+3.5V_ST
PANEL_CTL
R416
1K 001:AL22
R415
100 R418
10K
C
R417
INV_CTL
B 10K
E
Q403
MMBT3904(NXP)
P401
R419 3.9K
OPT
DRV ON
2
PDIM#1
4 PWM_DIM
PDIM#2
6 R420 100
PWM1
GND
8 T120
24V
10
GND
12
12V
14
N.C
16 +3.5V_ST
GND
18
19
BLM18PG121SN1D
C418
10uF
10V
+5V_Normal
R1
R404
C402
33K
22uF
1% C413
C412
16V +3.3V_Normal
330pF 0 . 1 u F
OPT R401
50V
27K 16V
OPT
1% R2
C414-*1
+5V_USB_1 NON_CI_CAP
C414 CAP_10uF_X5R
10uF CHANGE TO C419
10V 10uF 10V
10UF/10V/X5R 0 . 1 u F
85C
CAP_10uF_X7R 16V
SW_OUT C415
+5V_Normal
22uF
10V
AGND
R403
10K
USB1_OCD
FAULT
EN_SW +3.3V_Normal
R421
4.7K
OPT
USB1_CTL
PANEL_POWER
R441-*2
5.1K
5.1K_PANEL_DISCHARGE
OPT
C428
0 . 0 1 5 u F
0 . 0 1 u F C424 R442-*2
C420 10uF
C423 New item
5.1K
0 . 1 u F 25V
0 . 0 1 5 u F 0 . 0 1 u F
25V 5.1K_PANEL_DISCHARGE
50V 50V Q406
AO3407A R441-*1
4.7K
PANEL_DISCHARGE_RES_4.7K
C431 PANEL_DISCHARGE_RES_4.7K
R435 10uF
33K
25V G
OPT
C435
R436
5.6K 0 . 1 u F
25V
C
R426
NON_CI_CAP
10K
B Q405 C437
MMBT3904(NXP) 0 . 1 u F
25V
E
R425
10K
+1.5V_DDR
Max 1000mA
IC404
AP7173-SPG-13 HF(DIODES)
L410
[ E P ]
IN OUT
1 8
R1
R440
PG FB
4.3K
2 7
1/16W
1%
VCC SS
C439
3 1.5A 6
+3.3V_Normal R2 22uF
R430
10V
EN GND C433
10K
4 5
560pF
50V
NON_CI_CAP
C421
0 . 1 u F
16V
V o u t = 0 . 8 * ( 1 + R 1 / R 2 ) = 1 . 5 3 1 9
+2.5V/+1.8V
+2.5V_Normal
300 mA
Vd=550mV
R434
1
C425 D402
10uF 5V
10V OPT
LDO_NEW
I C 4 0 2 - * 1
T J 1 1 1 8 S - 2 . 5
IN OUT
3 2
1
GND
+ 3 . 5 V _ S T - - > 3 . 3 7 5 V - - > 3 . 4 6 V
+12V
+ 2 0 V - - > 3 . 5 1 V - - > 3 . 7 6 V ( 3 . 5 9 V ) +3.5V_ST
+ 2 4 V - - > 3 . 7 8 V - - > 3 . 9 2 V ( 3 . 7 9 V )
+ 1 2 V - - > 3 . 5 8 V - - > 3 . 8 2 V ( 3 . 6 8 V )
+ 1 8 . 5 V - - > 3 . 5 V - - > 3 . 7 5 V ( 3 . 5 9 V )
PD_+12V PD_+3.5V
R455
R450
0
2.7K
1% 5%
VCC
R442-*1 PD_KR_42_LIPS
4.7K PD_+12V R455-*1
R451 100
1.2K
1%
1%
PANEL_VCC
PD_KR_42_LIPS
+24V R451-*1
5.1K
1%
PD_+24V
R443 PD_+24V_PWR_DET_ON_SEMI
8.2K
1%
R441 R442
VCC
5.6K 5.6K
PD_+24V
R444
PD_+24V
1.5K
C441
1%
0 . 1 u F
PANEL_DISCHARGE_RES_5.6K
16V
PANEL_DISCHARGE_RES_5.6K
+3.3V_Normal
+3.5V_ST
+1.5V_DDR
NON_CI_CAP
C443
R454
0 . 1 u F
16V 10K
C440
D403
0 . 1 u F 5V
16V OPT
R456
POWER_ON/OFF_1
10K
S 7 L R c o r e 1 . 2 V v o l t
C422
+3.3V_Normal
0 . 3 3 u F
R429
16V
10K
+3.5V_ST
C426
0 . 1 u F
16V
L408
PH_3
12
NON_CI_CAP
VIN_2 PH_2
2 17 11
C416 C417
10uF 0 . 1 u F
PH_1
10
10V 16V
GND_2 SS/TR
4 9
R433
1/16W 330K 5%
3A $ 0 . 1 6 5
Vout=0.827*(1+R1/R2)=1.225V
LA2AW
POWER
+3.5V_ST
R457
100K
R465 RESET_IC_SOC_RESET
10K
PWR_DET_ON_SEMI
IC405
NCP803SN293
R461
POWER_DET
RESET 300
3 2
RESET_IC_SOC_RESET I C 4 0 5 - * 1
1
APX803D29
C445
GND
0 . 1 u F
POWER_DET_RESET
RESET VCC
2 3
1
PD_+24V
GND
R460
100K
PWR_DET_ON_DIODES
I C 4 0 6 - * 1
IC406 APX803D29
NCP803SN293 PD_+24V
R462
100
RESET RESET VCC
3 2 2 3
1 1
GND GND
PD_+24V_PWR_DET_DIODES
Power_DET
780 mA
FET_AOS +3.3V_Normal
Q408 L412
AO3407A BLM18SG700TN1D
C448 D404
C446
G 22uF 5V
0 . 1 u F
R458 10V
16V
22K
FET_2.5V
C444-*1
2 . 2 u F
10V
FET_2.5V
R459-*1
2.2K
FET_2.5V_DIODE FET_2.5V_AOS
FET_AOS AO3435
DMP2130L
R459 Q408-*2
Q408-*1
100
C
B Q407
MMBT3904(NXP)
E
+1.10V_VDDC
L411
3.6uH
NR8040T3R6N
C438 D405
C432 C434
0 . 1 u F 5V
22uF 22uF
16V
OPT
10V 10V
C427
3300pF C436
50V
R1
R438 100pF
27K
1/16W
1%
C429
3300pF
50V
R2
R439
56K
1/16W
1%
2 0 1 2 . 0 9 . 1 1
4
LGE Internal Use Only