Read LG 32LH20D (CHASSIS:LB91A) 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.
POWER
C901
0.1uF
16V
0.1uF
16V
C947
0.1uF
50V
0.1uF
50V
R949
22K
1%
OPC_OUT
L913
2.2uH
R909
0
OPT
C955
0.1uF
0.1uF
50V
ERROR_OUT
R946
1.8K
C940
0.1uF
16V
OPT
L910
BLM18PG121SN1D
Big_+24V/Small_+15V
L909
CB3216UA121
26"UP
GND
C918
100uF
16V
16V
26"UP
C950
100uF
25V
25V
PWM_DIM
C942
0.1uF
50V
0.1uF
50V
C914
0.1uF
0.1uF
50V
26"UP
L918
22"UNDER
Big_+12V/Small_+15V
009:P1;009:AC2
IC906
MP2305DS
3
SW
2
IN
4
GND
1
BS
5
FB
6
COMP
7
EN
8
SS
C905
100uF
100uF
16V
C945
22uF
22uF
16V
R933
10.5K
1%
R943
10K
R936
10K
OPT
+3.3V_ST
+5V_ST
Q904
2SC3052
2SC3052
E
B
C
C956
5.6nF
50V
R913
0
22"UNDER
R926
10K
R951
56000
5%
C908
0.1uF
16V
0.1uF
16V
C917
0.1uF
50V
0.1uF
50V
IC901
AP1117E33G-13
2
OUT
3
IN
1
ADJ/GND
Big_+24V/Small_+15V
C932
4.7uF
4.7uF
16V
Q903
2SC3052
26"UP
E
B
C
+3.3V
R957
56K
1%
1%
C931
10uF
16V
16V
C944
330pF
C904
0.1uF
50V
R937
75K
75K
1/8W
1%
+1.8V_DDR
C916
0.1uF
0.1uF
50V
POWER_ON/RL_ON
R939
22K
1%
1%
R938
10K
10K
C925
22uF
C937
0.1uF
50V
0.1uF
50V
+5V_ST
Big_+12V/Small_+15V
C948
0.1uF
50V
0.1uF
50V
+5V_ST
IC902
MP2212DN
3
IN
2
GND
4
BS
1
FB
5
VCC
6
SW_1
7
SW_2
8
EN/SYNC
+3.3V_AVDD_MPLL
C928
10uF
R945
10K
0.1uF
C949
4.7K
R901
22
R922
OPT
GND
PWM_DIM_LARGE
R934
8.2K
1%
R944
10K
1/10W
OPT
+3.3V_AVDD
+3.3V
+3.3V
C902
0.1uF
OPT
+3.3V_ST
R925
22
OPC
C939
0.1uF
50V
0.1uF
50V
C910
220uF
220uF
16V
R931
10K
26"UP
L915
3.6uH
NR8040T3R6N
R950
10K
1/10W
SMALL_PANEL_POWER_SRC
R948
10K
C912
0.1uF
50V
C946
22uF
16V
OPT
R911
0
OPT
L905
BLM18PG121SN1D
22"UNDER
R958
9.1K
R908
0
L914
2.2uH
+3.3V_ST
R935
10K
C951
0.47uF
25V
0.47uF
25V
R953
100K
POWER_ON/RL_ON
001:AO11;009:M10;009:AE12;010:W17
A_DIM
C930
0.1uF
50V
0.1uF
50V
+5V_USB
L911
BLM18PG121SN1D
+3.3V_ST
R940
22K
L902
BLM18PG121SN1D
22"UNDER
L916
BLM18PG121SN1D
+12V
R952
75K
5%
+5V_ST
R942
10
1/10W
1%
R959
12.4K
12.4K
1%
C959
0.1uF
50V
0.1uF
50V
C922
22uF
22uF
OPT
Q906
RSR025P03
S
D
G
C906
0.1uF
50V
C938
330pF
+1.8V_AMP
L908
BLM18PG121SN1D
C926
22uF
+5V_ST
L912
BLM18PG121SN1D
26"UP
+1.26V_VDDC
C953
22uF
16V
22uF
16V
3216
PANEL_POWER
R941
22K
C966
0.1uF
50V
0.1uF
50V
C929
0.01uF
50V
C927
10uF
Q905
2SC3052
2SC3052
E
B
C
L903
CB3216UA121
L906
CB3216UA121
PANEL_CTL
001:AK10
+1.8V_DDR
L921
Big_+12V/Small_+15V
L917
22UH
22UH
C919
22uF
22uF
L920
BLM18PG121SN1D
C967
0.1uF
50V
0.1uF
50V
+5V_TUNER
GND
+5V_ST
C960
0.1uF
C965
0.1uF
0.1uF
+5V_GENERAL
001:G23;005:Y4;005:Z4;009:AK3
Q908
RSR025P03
S
D
G
R956
10K
C961
10uF
16V
C963
10uF
Q907
2SC3052
E
B
C
+5V_ST
L922
CIC21J501NE
POWER_ON/RL_ON
R961
560
C958
10uF
OPT
C962
22uF
16V
C964
22uF
16V
L919
BLM18PG121SN1D
26"UP
+5V_GENERAL
L901
BLM18PG121SN1D
26"UP
+12V
R962
0
22"
R960
10K
R929
10K
26"UP
Q902
26"UP
1
2
3
L907
BLM15BD121SN1
26"UP
R930
33K
OPT
R918
0
26"UP
POWER_ON/OFF_RESETIC
POWER_ON/RL_ON
R964
0
R965
0
R963
0
POWER_ON/OFF_GPIO
+3.3V_ST
R916
10K
10K
+5V_GENERAL
R912
100
100
R928
10K
OPT
Q901
2SC3052
E
B
C
R927
10K
INV_CTL
R914
6.8K
OPT
6.8K
OPT
R919
10K
10K
A_DIM_SMALL
A_DIM_SMALL
L904
BG2012B080TF
22"UNDER
C907
1uF
25V
25V
OPT
PWM_DIM_LARGE
P902
FM20020-24
26"UP
EAG60670701
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
PWR_ON
16
GND
11
GND
6
GND
1
NC
20
INV ON
15
GND
10
5.2V
5
GND
21
A_DIM
22
Err OUT
23
NC
24
P_DIM
25
.
P901
WAFER-ANGLE
22"UNDER
6602T20009K
1
15V(18v)
2
15V(18v)
3
GND
4
GND
5
5V
6
5V
7
ACD
8
PWR-ON
9
INV_CTL
10
DIM
11
INV_BR
C968
0.1uF
50V
0.1uF
50V
L923
BLM18PG121SN1D
L924
BLM18PG121SN1D
22"UNDER
SMALL_PANEL_POWER_SRC
IC903
BD9150MUV
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
C915
68uF
68uF
C913
68uF
68uF
C933
1uF
25V
C943
1uF
25V
OPT
1uF
C903
25V
OPT
C954
4.7uF
10V
OPT
C957
4.7uF
10V
OPT
C970
100pF
50V
100pF
50V
OPT
C971
100pF
50V
OPT
C984
0.022uF
16V
0.022uF
16V
C969
0.022uF
16V
0.022uF
16V
OPT
C952
0.1uF
50V
0.1uF
50V
R947
0
C936
0.1uF
50V
EAX59793902(0)
9 11
POWER
2009.01.31
Stand-by +3.3V
C1130
C IN
$0.24
450 mA
Placed on SMD-TOP
Vout=0.923*(1+R1/R2)
MAX 3A
Vout=0.8*(1+R1/R2)
Close to IC
$0.07
465 mA @85% efficiency
Placed on SMD-TOP
4.9A 0.0150OHM 34MHZ
R2
Close to IC
Vout=0.8*(1+R1/R2)
R1
Panel Power
$0.048
C OUT
$0.28
Replaced Part
+5V
S6 core 1.26 volt
R1
DEVELOPE
R2
1600 mA
R2
FROM LIPS & POWER B/D
R1
For Power Sequence about PSU
+5V_GENERAL(Src is +5V_ST)
AUS_LH20/LH35 MP
Direction
Direction
Click on the first or last page to see other 32LH20D (CHASSIS:LB91A) service manuals if exist.