Read LG 42LH250C (CHASSIS:LD91Z) Service Manual online
PANEL_POWER
+5V_ST
+3.3V_ST
+12V/+15V
PANEL_CTL
0 0 1 : A J 1 0
+3.3V_AVDD_MPLL
+3.3V_ST
2SC3052
Q805
E
B
C
2SC3052
Q804
E
B
C
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.
BLM18PG121SN1D
L803
0 . 1 u F
16V
16V
C803
0 . 1 u F
16V
16V
C808
+5V_GENERAL
+5V_USB_SIDE
+12V/+15V
56K
1%
1%
R847
9.1K
R852
0 . 4 7 u F
25V
25V
C839
12.4K
1%
R853
MP2305DS
IC808
3
SW
2
IN
4
GND
1
BS
5
FB
6
COMP
7
EN
8
SS
+3.3V
+1.8V_AMP
+5V_ST
+1.8V_DDR
2.2uH
L827
2.2uH
L826
10uF
10V
C879
10uF
10V
C878
330pF
C883
330pF
C882
56000
R873
75K
R874
POWER_ON/OFF1
0 0 1 : A J 1 1 ; 0 0 8 : C 2 5 ; 0 0 8 : L 1 1 ; 0 0 8 : A F 9
+3.3V
+1.2V_TUNER
RSR025P03
Q806
S
D
G
+3.3V_CI
A_DIM
220uF
16V
C824
+5V_GENERAL
+5V_ST
ERROR_OUT
+12V
PWM_DIM
PWM_DIM
A_DIM_1
2SC3052
Q802
E
B
C
+24V/+15V
PWM_DIM
ERROR_OUT
+3.3V_ST
+5V_ST
INV_CTL
PWM_DIM
A_DIM_1
+3.3V_AVDD
+3.3V
0 . 1 u F
50V
C813
+3.3V
0 . 1 u F
50V
50V
C864
0 . 1 u F
50V
50V
19~22
C854
2 . 2 u F
19~22
C855
+12V/+15V
19~22
Q807
S
D
G
POWER_ON/OFF1
0 . 0 1 u F
50V
C862
+24V/+15V
19~22
Q803
E
B
C
+12V
BLM18PG121SN1D
L817
BLM18PG121SN1D
L814
BLM18PG121SN1D
L810
12V_PANEL
1.8K
R843
AMP_VCC
BLM18PG121SN1D
L823
19~22
BLM18PG121SN1D
26~52
L809
BLM18PG121SN1D
26~52
L808
8.2K
1%
R871
10.5K
1%
R809
22UH
L819
5 . 6 n F
50V
C860
AP1117E18G-13
IC803
2
OUT
3
IN
1
ADJ/GND
AP1117E33G-13
IC801
2
OUT
3
IN
1
ADJ/GND
10
1%
R826
0 . 1 u F
C856
NR8040T3R6N
3.6uH
L813
+1.26V_VDDC
+3.3V
+5V_ST
+3.3V_ST
BLM18PG121SN1D
L821
RSR025P03
Q809
S
D
G
2SC3052
Q808
E
B
C
+5V_ST
PANEL_POWER
BLM18PG121SN1D
OPT
L816
POWER_ON/OFF1
0 0 1 : A J 1 1 ; 0 0 8 : C 2 5 ; 0 0 8 : L 1 1 ; 0 0 8 : Q 1 4
CB3216UA121
L807
CB3216UA121
L804
CB3216UA121
L806
BLM18PG121SN1D
L800
19~22
BLM18PG121SN1D
L805
BLM18PG121SN1D
L812
BLM18PG121SN1D
19~22
L824
MP2212DN
IC805
3
IN
2
GND
4
BS
1
FB
5
VCC
6
SW_1
7
SW_2
8
EN/SYNC
1/8W
75K
1%
R827
4 . 7 u F
16V
C847
10uF
16V
16V
C845
OPT
100uF
16V
16V
C826
AZ1117H-1.2TRE1
IC804
1
ADJ/GND
2
OUT
3
IN
0 . 1 u F
16V
16V
C884
WAFER-ANGLE
19~22
P801
1
2
3
4
5
6
7
8
9
10
11
10uF
C866
0 . 4 7 u F
25V
C891
22uF
10V
C837
OPT
22uF
10V
10V
C838
22uF
C849
OPT
22uF
10V
C843
22uF
10V
C880
22uF
10V
C876
68uF
C832
35V
68uF
C821
OPT
35V
+5V_ST
RT1P141C-T112
Q801
1
2
3
+3.3V_ST
33K
OPT
OPT
R807
2SC3052
Q800
E
B
C
POWER_ON/OFF1
+1.8V_DDR
0
R810
0
R806
OPT
+3.3V_TUNER
+5V_GENERAL
AP1117E33G-13
IC809
2
OUT
3
IN
1
ADJ/GND
0
OPT
R808
0
21 ERROR
R845
0
21 GND
21 GND
R875
0
21 ADIM
R851
0
22 GND
R812
0
22 PDIM
R855
0
20 INV_CTL
R858
0
22 ERROR
R841
0
OPT
R870
0 . 0 1 u F
25V
25V
C848
0 . 0 1 u F
25V
25V
C841
0 . 1 u F
16V
16V
C817
0 . 1 u F
16V
OPT
C818
0 . 1 u F
16V
C820
0 . 1 u F
16V
C865
0 . 1 u F
16V
16V
C890
0 . 1 u F
16V
C885
0 . 1 u F
16V
C802
0 . 1 u F
16V
16V
C812
0 . 1 u F
16V
16V
C811
0 . 1 u F
16V
16V
C852
0 . 1 u F
16V
16V
C825
0 . 1 u F
16V
16V
C815
0 . 1 u F
16V
16V
C827
0 . 1 u F
16V
16V
OPT
C828
0 . 1 u F
16V
16V
C894
0 . 1 u F
16V
16V
OPT
C807
0 . 1 u F
16V
16V
C805
0 . 1 u F
16V
16V
C814
0 . 1 u F
16V
16V
C863
0 . 1 u F
16V
16V
C842
0 . 1 u F
16V
16V
C859
0 . 1 u F
16V
16V
C877
0 . 1 u F
16V
C850
100
R814
100K
R848
1/16W
10K
R831
10K
R804
OPT
1/16W
10K
OPT
R830
10K
19~22
R829
10K
R802
10K
R832
OPT
10K
R872
10K
R833
10K
OPT
OPT
R823
10K
R822
10K
R800
10K
R840
10K
OPT
OPT
R864
10K
R842
10K
R821
1uF
6.3V
6.3V
C804
1uF
6.3V
6.3V
OPT
C823
1uF
6.3V
C840
1uF
6.3V
C829
2.2K
19~22
R834
22
24 PDIM
R859
22K
1%
1%
R824
22K
1%
R825
22K
R839
22K
19~22
R835
22K
R837
22K
R857
33K
R865
4.7K
R856
4.7K
R803
6.8K
OPT
R815
FW20020-24S
26~52
P800
19
NC
14
12V
9
5.2V
4
GND
18
24V
13
12V
8
5.2V
3
GND
17
24V
12
GND
7
5.2V
2
P_ON
16
GND
11
GND
6
GND
1
NC
20
INV_ON
15
GND
10
5.2V
5
GND
21
A_DIM
22
ERROR
23
NC
24
P_DIM
3.3K
R818
100uF
16V
16V
C893
100uF
16V
16V
C892
100uF
16V
16V
C810
100uF
16V
16V
C801
100uF
16V
16V
C800
100uF
16V
16V
C822
100uF
16V
16V
C806
470uF
16V
C809
0 . 1 u F
50V
C868
1uF
25V
C853
1
R801
1
R811
BD9150MUV
IC806
1
PGND2_1
3
PVCC_2
7
SW1_1
9
EN1
10
FB1
11
ITH1
12
AGND
13
NC
14
AVCC
15
ITH2
16
FB2
17
EN2
18
SW2_1
19
SW2_2
20
PGND2_2
5
PGND1_1
8
SW1_2
6
PGND1_2
4
PVCC_3
2
PVCC_1
0
OPT
R813
BLM18PG121SN1D
L801
5V_PANEL
+5V_ST
22K
R842-*1
2.7K
R843-*1
0
R862
4.7K
R805
0 . 1 u F
50V
50V
C836
22uF
16V
16V
C858
22uF
25V
25V
C835
OPC_OUT
22
OPC
R860
10K
R817
10K
R816
0 . 1 u F
50V
50V
C870
RJP_DET
+12V_RJP
0 . 1 u F
50V
50V
C833
RSR025P03
Q812
S
D
G
CB3216PA501E
L820
0 . 1 u F
50V
50V
C869
+12V
10K
19~22
R819
0 . 4 7 u F
25V
19~22
C816
MP2355DN-LF-Z
19~22
IC802
IC802
3
VIN
2
BST
4
LX
1
SS
5
GND
6
FB
7
COMP
8
RUN
MBRS340
19~22
D801
0 . 1 u F
50V
19~22
C819
10K
19~22
R820
0 . 0 1 u F
50V
50V
19~22
C830
1N4148W
100V
19~22
D800
6.8K
19~22
R836
2700pF
50V
19~22
C831
22uH
19~22
L802
1/16W
59K
19~22
R828
+12V
+5V_ST
22uF
16V
16V
19~22
C834
+5V_ST
+24V/+15V
0 . 1 u F
50V
OPT
C844
S t a n d - b y + 3 . 3 V
8 1 1
POWER
+5V
$ 0 . 0 4 8
50 mA
180 mA
$ 0 . 0 5
450 mA
FROM LIPS & POWER B/D
+12V
S 6 c o r e 1 . 2 6 v o l t
$ 0 . 2 8
$ 0 . 0 4 8
R1
R2
NOT_OPC
O
X
R860
OPC
PANEL_POWER
V o u t = 0 . 8 * ( 1 + R 1 / R 2 )
R e p l a c e d P a r t
R e p l a c e d P a r t
R1
C l o s e t o I C
$ 0 . 0 7
C IN
465 mA @85% efficiency
C l o s e t o I C
Placed on SMD-TOP
Placed on SMD-TOP
R e p l a c e d P a r t
1600 mA
MAX 3A
$ 0 . 2 4
4.9A 0.0150OHM 34MHZ
R2
R1
R2
V o u t = 0 . 8 * ( 1 + R 1 / R 2 )
V o u t = 0 . 9 2 3 * ( 1 + R 1 / R 2 )
DEVELOPE
$ 0 . 0 4 8
R e p l a c e d P a r t
R859
O
X
OPT
5V_PANEL_OPT
AUO PSU
20 INV_CTL
21 ERROR
LGD V3
NC
2 0 P I N
OPC
22 PDIM
24 PDIM
22 ERROR
2 2 P I N
21 ADIM
20 INV_CTL
2 1 P I N
22 ERROR
LGD V4
2 4 P I N
20 INV_CTL
21 ADIM
S h a r p P S U
20 INV_CTL
21 ERROR
22 GND
24 PDIM
+12V RJP
DC DC CONVERTER +12V
COMMERCIAL_LITE LH250
EAX61353501
2 0 0 9 . 0 6 . 0 9
POWER
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