Read LG 42LN548C / 42LN549C / 42LP360H / 42LP361H (CHASSIS:LD3AC) Service Manual online
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.
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.
+3.5V_ST
0 . 1 u F
C451
DELETE
100K
R404
PD_+24V
10K
R430
+12V
NR8040T3R6N
3.6uH
L415
AO3407A
Q409
G
D
S
56K
1%
1%
R441
22uF
10V
C456
+3.5V_ST
560pF
50V
50V
C467
1.5K
1%
1%
R403
PD_+24V
THERMAL
TPS54319TRE
IC403
1
VIN_1
3
GND_1
7
COMP
9
SS/TR
10
PH_1
11
PH_2
12
PH_3
13
BOOT
14
PWRGD
15
EN
16
VIN_3
5
AGND
8
RT/CLK
6
VSENSE
4
GND_2
2
VIN_2
17
EP[GND]
0 . 1 u F
16V
16V
C440
+3.3V_Normal
L413
SS
10K
R443
0 . 1 u F
C474
22uF
10V
C453
10uF
10V
10V
C403
5.6K
R440
22uF
10V
C472
+1.5V_DDR
POWER_DET
47K
R429
DELETE
L412
SS
1/16W 330K 5%
R432
0 . 1 u F
16V
16V
C438
0 . 1 u F
16V
16V
C411
0 . 1 u F
16V
16V
DELETE
C445
0 . 1 u F
16V
C425
4 . 7 u F
16V
16V
C423
FET_AOS
PANEL_CTL
THERMAL
AP7173-SPG-13 HF(DIODES)
IC407
3
VCC
2
PG
4
EN
1
IN
5
GND
6
SS
7
FB
8
OUT
9
[ E P ]
+3.5V_ST
+1.10V_VDDC
10uF
25V
C443
100
R480
PD_+24V
+12V
10uF
16V
16V
DELETE
C442
+3.3V_Normal
0 . 1 u F
16V
16V
C432
10K
R463
RESET_IC_SOC_RESET
0 . 1 u F
16V
16V
C444
0 . 1 u F
16V
16V
C435
0 . 1 u F
16V
C447
100K
R488
0 . 1 u F
16V
C476
0 . 1 u F
16V
16V
C431
0 . 1 u F
16V
16V
C455
10uF
10V
10V
C430
+3.3V_Normal
33K
R439
1.21K
1%
R447
PD_+12V
0 . 1 u F
16V
16V
C412
PD_+24V
22K
R435
DELETE
PANEL_VCC
100pF
50V
C439
0 . 1 u F
16V
16V
C475
100
R402
3.5V_SOC_RESET
10K
R433
+2.5V_Normal
+3.3V_Normal
10K
R428
22K
R438
BLM18PG121SN1D
L420
+3.5V_ST
22K
R431
DELETE
10uF
10V
C461
+3.5V_ST
BLM18PG121SN1D
L403
0 . 1 u F
16V
C441
+24V
10K
R434
POWER_ON/OFF_1
15K
R436
27K
1%
1%
R442
4.3K
1%
R457
4.7K
1%
1%
R456
T J 3 9 4 0 S - 2 . 5 V - 3 L
IC402
1
GND
2
VOUT
3
VIN
0
R414
10K
R489
10K
R490
DELETE
RL_ON
2.2K
R405
DELETE
2.2K
R407
DELETE
2.7K
1%
PD_+12V
R448
0
5%
5%
PD_+3.5V
R450
1
R473
3K
3K_PANEL_DISCHARGE
R407-*1
3K
R405-*1
3K_PANEL_DISCHARGE
0 . 0 1 u F
50V
C436
0 . 0 1 u F
0 . 0 1 5 u F
50V
50V
C409
0 . 0 1 5 u F
3300pF
50V
C448
3300pF
C488
8.2K
1%
1%
R482
PD_+24V
MMBT3904(NXP)
Q407
E
B
C
MMBT3904(NXP)
Q406
DELETE
E
B
C
MMBT3904(NXP)
Q400
E
B
C
APX803D29
IC408
POWER_DET_DIODES
1
GND
3
VCC
2
RESET
NCP803SN293
IC408-*1
POWER_DET_ON_SEMI
1
GND
3
VCC
2
RESET
NCP803SN293
PD_+24V_PWR_DET_ON_SEMI
IC409-*1
1
GND
3
VCC
2
RESET
APX803D29
IC409
PD_+24V_PWR_DET_DIODES
1
GND
3
VCC
2
RESET
100
R445
FET_AOS
AO3407A
Q403
FET_AOS
G
D
S
5.1K
R405-*2
5.1K_PANEL_DISCHARGE
5.1K
R407-*2
5.1K_PANEL_DISCHARGE
22uF
10V
10V
C437
MMBT3904(NXP)
Q405
E
B
C
+3.5V_ST
MMBT3904(NXP)
Q401
E
B
C
+3.5V_ST
+3.5V_ST
+3.3V_Normal
10K
R401
+3.5V_ST
+24V
MMBT3906(NXP)
Q402
1
2
3
PWM_DIM
10K
OPT
R461
0 . 1 u F
50V
C418
4.7K
R406
10K
R462
CIC21J501NE
L404
SS
100
PWM2_2CH_POWER
R408
0 . 1 u F
16V
C404
CIC21J501NE
L408
SS
0 . 1 u F
16V
C406
PWM1
INV_CTL
10K
R426
+12V
10K
R409
10K
R421
MLB-201209-0120P-N2
L402
SMAW200-H18S1
P401
14
12V
9
24V
4
PDIM#1
18
GND
13
12V
8
GND
3
3.5V
17
GND
12
GND
7
GND
2
DRV ON
16
N.C
11
GND
6
PDIM#2
1
PWR ON
15
12V
10
24V
5
3.5V
19
.
MLB-201209-0120P-N2
L407
1K
R419
POWER_DET_RESET
300
R402-*1
RESET_IC_SOC_RESET
JP_GND1
JP_GND2
JP_GND4
JP_GND3
2.2K
FET_2.5V
R445-*1
2 . 2 u F
10V
10V
FET_2.5V
C423-*1
DMP2130L
FET_2.5V_DIODE
Q403-*1
G
D
S
AO3435
FET_2.5V_AOS
Q403-*2
G
D
S
100K
R410
10uF
CAP_10uF_X5R
10V
85C
C417
CIC21J501NE
L401
SS
27K
1%
R453
0
R491
3.6uH
L406
+3.3V_Normal
330pF
50V
C424
22uF
16V
16V
C420
+5V_Normal
4.7K
DELETE
R417
2K
R411
THERMAL
TPS65281RGV
IC401
3
ROSC
2
COMP
4
RLIM
1
SS
EN_SW
5
FAULT
6
AGND
7
SW_OUT
8
SW_IN
9
FB
10
LX
11
BST
12
PGND
13
VIN
14
V7V
15
EN
16
17
[ E P ]
100pF
50V
DELETE
C426
4 . 7 u F 10V
C419
USB1_CTL
20K
R413
+5V_Normal
11K 1%
R454
10uF 10V
CAP_10uF_X7R
C417-*1
22uF
16V
16V
OPT
C421
USB1_OCD
10uF
16V
16V
C405
33K
1%
R452
0 . 1 u F
16V
16V
DELETE
C422
3300pF
50V
50V
C410
10K
R412
+12V
0 . 0 4 7 u F
25V
25V
C413
+5V_USB
5V OPT
D401
5V
OPT
D403
5V
OPT
OPT
D402
5V
OPT
OPT
D405
5V
OPT
OPT
D404
500-ohm
L401-*1
SAMWHA
500-ohm
SAMWHA
L404-*1
500-ohm
SAMWHA
L408-*1
500-ohm
SAMWHA
L412-*1
500-ohm
SAMWHA
L413-*1
POWER
4
4A
R2
New item
Max 1000mA
V o u t = 0 . 8 * ( 1 + R 1 / R 2 ) = 1 . 5 3 1 9
+1.5V_DDR
$ 0 . 1 6 5
Vd=550mV
1 2 V - - > 3 . 5 8 V - - > 3 . 8 2 V ( 3 . 6 8 V )
+3.3V_Normal
FROM LIPS & POWER B/D
R1
780 mA
PANEL_POWER
+ 3 . 5 V _ S T - > 3 . 3 7 5 V
R1
1.5A
S 7 L R c o r e 1 . 2 V v o l t
R2
300 mA
Vout=0.827*(1+R1/R2)=1.225V
2 4 V - - > 3 . 7 8 V - - > 3 . 9 2 V ( 3 . 7 9 V )
S T _ 3 . 5 V - - > 3 . 3 7 5 V - - > 3 . 4 6 V
+2.5V/+1.8V
Power_DET
2 0 1 2 . 1 1 . 1 2
2013 S7LR2
+5V_Normal
&
+5V_USB
&
+5V_USB
V o u t = 0 . 8 * ( 1 + R 1 / R 2 )
CHANGE TO
16V/X5R
R1
CHANGE TO
10UF/10V/X5R
R2
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