Read LG 32LH30FD (CHASSIS:LT91A) 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.
0 . 1 u F
16V
16V
C901
0 . 1 u F
50V
50V
C947
22K 1%
R949
OPC_OUT
2.2uH
L913
0
22"UNDER
R909
0 . 1 u F
50V
C955
ERROR_OUT
1.8K
R946
BLM18PG121SN1D
L910
Big_+24V/Small_+15V
CB3216UA121
L909
26"UP
GND
100uF
16V
16V
C918
26"UP
PWM_DIM
0 . 1 u F
50V
50V
C942
0 . 1 u F
50V
C914
26"UP
L918
22"UNDER
Big_+12V/Small_+15V
0 0 9 : P 1 ; 0 0 9 : A C 2
MP2305DS
IC906
3
SW
2
IN
4
GND
1
BS
5
FB
6
COMP
7
EN
8
SS
100uF
16V
C905
22uF
16V
C945
10.5K
1%
R933
10K
R943
10K
R936
OPT
+3.3V_ST
+5V_ST
2SC3052
Q904
E
B
C
5 . 6 n F
50V
C956
0
R913
22"UNDER
10K
R926
56000
5%
R951
0 . 1 u F
16V
16V
C908
0 . 1 u F
50V
50V
C917
AP1117E33G-13
IC901
2
OUT
3
IN
1
ADJ/GND
Big_+24V/Small_+15V
4 . 7 u F
16V
C932
2SC3052
Q903
26"UP
E
B
C
+3.3V
56K
1%
1%
R957
10uF
16V
16V
C931
330pF
C944
0 . 1 u F
50V
C904
1/8W
75K
1%
R937
+1.8V_DDR
0 . 1 u F
50V
C916
26"UP
POWER_ON/RL_ON
22K
1%
1%
R939
10K
R938
22uF
C925
0 . 1 u F
50V
50V
C937
+5V_ST
Big_+12V/Small_+15V
0 . 1 u F
50V
50V
C948
+5V_ST
MP2212DN
IC902
3
IN
2
GND
4
BS
1
FB
5
VCC
6
SW_1
7
SW_2
8
EN/SYNC
+3.3V_AVDD_MPLL
10uF
C928
10K
R945
0 . 1 u F
C949
4.7K
R901
22
V3_MODULE
R922
GND
8.2K
1%
R934
1/10W
10K
OPT
R944
+3.3V_AVDD
+3.3V
+3.3V
0 . 1 u F
OPT
C902
+3.3V_ST
22
OPC
R925
0 . 1 u F
50V
50V
C939
220uF
16V
C910
10K
R931
26"UP
0 . 1 u F
16V
OPT
C903
NR8040T3R6N
3.6uH
L915
1/10W
10K
R950
SMALL_PANEL_POWER_SRC
10K
R948
0 . 1 u F
50V
C912
22uF
16V
C946
OPT
0
OPT
R911
BLM18PG121SN1D
L905
22"UNDER
9.1K
R958
0
R908
2.2uH
L914
+3.3V_ST
10K
R935
0 . 4 7 u F
25V
25V
C951
100K
R953
POWER_ON/RL_ON
001:AO11;009:M10;009:AE12;010:W17
A_DIM
0 . 1 u F
50V
50V
C930
+5V_USB_SIDE
BLM18PG121SN1D
L911
+3.3V_ST
22K
R940
BLM18PG121SN1D
L902
22"UNDER
BLM18PG121SN1D
L916
+12V
75K
5%
R952
+5V_ST
1/10W
10
1%
R942
12.4K
1%
R959
0 . 1 u F
50V
50V
C959
22uF
C922
OPT
RSR025P03
Q906
S
D
G
0 . 1 u F
50V
C906
330pF
C938
+1.8V_AMP
BLM18PG121SN1D
L908
22uF
C926
+5V_ST
BLM18PG121SN1D
26"UP
L912
+1.26V_VDDC
3216
22uF
16V
16V
C953
PANEL_POWER
22K
R941
0 . 1 u F
50V
50V
C966
0 . 0 1 u F
50V
C929
10uF
C927
2SC3052
Q905
E
B
C
CB3216UA121
L903
CB3216UA121
L906
PANEL_CTL
001:AK10
+1.8V_DDR
L921
Big_+12V/Small_+15V
22UH
L917
22uF
C919
BLM18PG121SN1D
L920
0 . 1 u F
50V
50V
C967
+5V_TUNER
GND
+5V_ST
0 . 1 u F
C960
0 . 1 u F
C965
+5V_GENERAL
0 0 1 : G 2 3 ; 0 0 5 : Y 4 ; 0 0 5 : Z 4 ; 0 0 9 : A K 3
RSR025P03
Q908
S
D
G
10K
R956
10uF
16V
C961
10uF
C963
2SC3052
Q907
E
B
C
+5V_ST
CIC21J501NE
L922
POWER_ON/RL_ON
560
R961
10uF
OPT
C958
22uF
16V
C962
22uF
16V
OPT
C964
BLM18PG121SN1D
L919
26"UP
+5V_GENERAL
BLM18PG121SN1D
26"UP
L901
+12V
0
R962
22"UNDER
10K
R960
10K
R929
OPT
Q902
26"UP
1
2
3
BLM15BD121SN1
L907
26"UP
33K
OPT
OPT
R930
0
R918
26"UP
POWER_ON/OFF_RESETIC
POWER_ON/RL_ON
0
R964
0
R965
0
R963
POWER_ON/OFF_GPIO
+3.3V_ST
10K
R916
+5V_GENERAL
100
R912
10K
OPT
OPT
R928
2SC3052
Q901
E
B
C
10K
R927
INV_CTL
6.8K
OPT
R914
10K
R919
A_DIM_SMALL
A_DIM_SMALL
BG2012B080TF
L904
22"UNDER
1uF
25V
25V
OPT
C907
6602T20009K
WAFER-ANGLE
P901
22"UNDER
1
1 5 V ( 1 8 v )
2
1 5 V ( 1 8 v )
3
GND
4
GND
5
5V
6
5V
7
ACD
8
PWR-ON
9
INV_CTL
10
DIM
11
INV_BR
0 . 1 u F
50V
50V
C968
BLM18PG121SN1D
L923
BLM18PG121SN1D
22"UNDER
L924
SMALL_PANEL_POWER_SRC
BD9150MUV
IC903
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
68uF
C915
68uF
C913
1uF
25V
C933
1uF
25V
C943
OPT
4 . 7 u F
10V
OPT
OPT
C954
4 . 7 u F
10V
OPT
OPT
C957
0 . 4 7 u F
25V
C940
22uF
25V
25V
C950
PWM_DIM
0 . 0 2 2 u F
16V
16V
C935
OPT
100pF
50V
50V
C920
OPT
0 . 0 2 2 u F
16V
16V
C934
OPT
100pF
50V
C923
FM20020-24
EAG60670701
26"UP
P902
19
14
12V
9
4
18
20V_24V
13
8
5V_ST
3
17
20V_24V
12
7
5V_ST
2
POWER_ON/RL_ON
16
11
6
1
20
INV_CTL
15
10
5
21
A_DIM
22
ERROR_OUT
23
24
PWM_DIM
25
0
R947
0 . 1 u F
50V
50V
C936
0 . 1 u F
50V
50V
C952
9 1 1
POWER
S t a n d - b y + 3 . 3 V
C1130
C IN
$ 0 . 2 4
450 mA
Placed on SMD-TOP
V o u t = 0 . 9 2 3 * ( 1 + R 1 / R 2 )
MAX 3A
V o u t = 0 . 8 * ( 1 + R 1 / R 2 )
C l o s e t o I C
$ 0 . 0 7
465 mA @85% efficiency
Placed on SMD-TOP
4.9A 0.0150OHM 34MHZ
R2
C l o s e t o I C
V o u t = 0 . 8 * ( 1 + R 1 / R 2 )
R1
P a n e l P o w e r
$ 0 . 0 4 8
C OUT
$ 0 . 2 8
R e p l a c e d P a r t
+5V
S 6 c o r e 1 . 2 6 v o l t
R1
DEVELOPE
R2
1600 mA
R2
FROM LIPS & POWER B/D
R1
F o r P o w e r S e q u e n c e a b o u t P S U
+5V_GENERAL for Small(Src is +5V_ST)
D i r e c t i o n
Direction
2 2 " O p t i o n h a s b e e n a p p l i e d t o t h i s b l o c k
Taiwan_LH20/LH30
EAX60838501
2 0 0 9 . 0 2 . 1 0
POWER
LGE Use Only
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