Read LG 32LH255H (CHASSIS:LA96C) 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.
+5V_EXT
+5V_GENERAL
10
OPT
R766
+5V_GENERAL
1uF
10V
10V
C769
0 . 1 u F
16V
16V
OPT
C773
68K
OPT
R763
+5V_EXT
3.6uH
OPT
L737
0 . 1 u F
16V
16V
OPT
C772
CB3216PA501E
OPT
L735
1uF
10V
C768
OPT
10K
OPT
R767
1N4148W_DIODES
100V
D704
OPT
CB3216PA501E
L736
1/8W
13K
1%
R761
OPT
0 . 1 u F
16V
16V
C766
10uF
10V
C765
1000pF
OPT
C767
+12V
100
OPT
R765
POWER_EN
008:AR30;004:X17;005:AA6
MP2212DN
IC703
OPT
3
IN
2
GND
4
BS
1
FB
5
VCC
6
SW_1
7
SW_2
8
EN/SYNC
1/10W
10K
R762
NR8040T3R6N
3.6uH
L726
22uF
C733
OPT
0 . 1 u F
16V
16V
C710
+5V_ST
0.1uF
16V
C746
9.1K
1%
1%
R713
10K
R718
1/8W
75K
1%
R722
10
R724
10K
R726
1uF
16V
C788
1/10W
10K
OPT
R731
MP2212DN
IC705
3
IN
2
GND
4
BS
1
FB
5
VCC
6
SW_1
7
SW_2
8
EN/SYNC
CB3216PA501E
L715
INV_CTL
008:AR32
NR8040T3R6N
3.6uH
L710
10K
R727
68uF
C727
35V
+3.3V_AVDD_MPLL
1/10W
18K
1%
R769
SC4215ISTRT
IC701
3
VIN
2
EN
4
NC_2
1
NC_1
5
NC_3
6
VO
7
ADJ
8
GND
2SC3875S(ALY)
Q700
E
B
C
+5V
10uF
6.3V
C708
0 . 1 u F
16V
16V
C760
0
R750
BLM18PG121SN1D
L720
2009_PWR
0 . 1 u F
C793
4 . 7 u F
25V
C743
CB3216PA501E
L708
0 . 1 u F
16V
16V
C717
POWER_ON/OFF1
0 0 8 : A R 3 1 ; 0 0 2 : A E 6 ; 0 0 4 : T 2 4
220uF
16V
16V
C726
2009_PWR
10K
R760
OPT
CB3216PA501E
L729
0 . 1 u F
16V
16V
C705
+5V_ST
+3.3V
47K
R739
+5V
10K
R728
OPT
10K
R720
POWER_ON/OFF1
008:AR31;002:AE6;004:Q27
2SC3875S(ALY)
OPT
Q708
E
B
C
BG2012B121F
L701
POWER_EN
008:AR30;004:AM17;005:AA6
+5V_GENERAL
+3.3V
10K
OPT
OPT
R721
10K
OPT
OPT
R747
1/10W
10K
R738
2SC3052
Q702
E
B
C
4 . 7 u F
6.3V
OPT
C762
68uF
C721
35V
0 . 1 u F
C749
2SC3052
Q704
E
B
C
MP2212DN
IC704
3
IN
2
GND
4
BS
1
FB
5
VCC
6
SW_1
7
SW_2
8
EN/SYNC
+3.3V_ST
+12V
+3.3V_ST
CB3216PA501E
L711
100
OPT
R756
10uF
10V
10V
C704
1N4148W_DIODES
100V
D703 OPT
+5V_ST
120K
R725
OPT
1N4148W_DIODES
100V
D700
OPT
10K
R733
OPT
BLM18PG121SN1D
L717
0 . 1 u F
16V
16V
C715
0 . 1 u F
16V
16V
C780
AP1117E33G-13
IC702
2
OUT
3
IN
1
ADJ/GND
10K
R729
6.8K
OPT
R715
1uF
25V
25V
C748
0 . 1 u F
16V OPT
C790
4.7K
R705
+1.26V_VDDC
MLB-201209-0120P-N2
L707
0 . 1 u F
50V
C719
PANEL_POWER
2SC3052
Q707
OPT
E
B
C
+5V_GENERAL
0 . 1 u F
50V
OPT
C720
47uF
25V
C722
10uF
C742
OPT
22K
R735
CB3216PA501E
L714
1/10W
10
1%
R734
120K
R701
OPT
10K
R719
0 . 1 u F
16V
16V
C758
2SC3052
Q705
E
B
C
12K
1%
R711
1/10W
56K
1%
R770
10uF
10V
C757
CB4532UK121E
L706
2009_PWR
+5V_GENERAL
BLM18PG121SN1D
L702
22uF
16V
C732
47K
R740
+3.3V_FE
22K
R732
10uF
10V
C712
+5V_ST_PTC
+3.3V
POWER_ON_DELAY
560
R730
BLM18PG121SN1D
L703
100
R714
+5V_ST
2SC3052
Q703
E
B
C
PANEL_CTL
008:AR32
CB4532UK121E
L704
4 . 7 u F
6.3V
OPT
C761
10K
R702
CB3216PA501E
L716
15pF
50V
C711
1/10W
22K
1%
R723
0 . 1 u F
50V
C728
BLM18PG121SN1D
L727
1uF
10V
C737
0 . 1 u F
16V
16V
C713
+1.8V_DDR
+3.3V_ST
0 . 1 u F
50V
50V
C794
10K
R706
+3.3V_ST
10uF
6.3V
C751
10uF
C756
RT1P141C-T112
Q701
1
2
3
33K
OPT
R708
POWER_ON_DELAY
0 0 8 : V 1 7 ; 0 0 4 : Q 2 8
0
R745
0
R746
1/8W
24K
R736
FM20020-24
P700
2009_PWR
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
PWM_DIM
25
RELAY_PTC
0 0 4 : E 1 4 ; 0 0 9 : U 2 7
OPT
R411
2 . 2 u F
25V
C405
10K
R413
2.2K
R415
100uF
16V
16V
C406
2009_PWR
2SC3875S(ALY)
Q403
2009_PWR
E
B
C
220uF
16V
C407
2009_PWR
1K
OPT
R412
22K
R414
+5V_ST_PTC
MSTAR_POWER_ON
002:AE6;002:AG13;009:N27
+5V_ST_PTC
+5V_ST_PTC
+5V_ST
+5V_ST_PTC
+12V
3.3K
R717
2009_PWR
560pF
50V
50V
C411
100K
5%
R421
1uF
10V
10V
C412
82K
R422
R422
3.3K
R710
0
R751
OPT
0
R752
OPT
0
OPT
R771
0
R703
OPT
0
R759
+24V_AUDIO
CB3216PA501E
L728
+24V_AUDIO
CB3216PA501E
OPT
L734
74LVC1G32GW
IC706
OPT
3
GND
2
A
4
Y
1
B
5
VCC
OR_RELAY_ON
0 0 4 : L 1 4
0
R2543
OR_RELAY_ON
004:Q26
0
R2542
OPT
RL_ON
008:AR33
RELAY_PTC
0 0 4 : Q 2 7 ; 0 0 9 : U 2 7
0
R2540
OPT
0
R2541
OPT
0 . 1 u F
16V
16V
C2253
+5V_ST_PTC
0
R2550
INV_ON_DEBUG
220uF
16V
C2254
1uF
50V
50V
C723
0 . 1 u F
50V
50V
C741
0 . 1 u F
50V
C770
OPT
0 . 1 u F
50V
C789
0
R737
0
R764
OPT
0
R744
INV_ON_DEBUG
A_DIM_10
ERROR_OUT_10
DIM_10
220uF
16V
16V
C795
2010_PWR
L721
2010_PWR
+3.5V_ST
0
R777
OPC_OUT
0 0 7 : O 2 0 ; 0 0 7 : Z 2 1
4.7K
R776
A_DIM
008:AF11
0
OPT
R773
0
OPT
R775
PWM_DIM
0 0 8 : A F 1 1 ; 0 0 7 : O 2 0 ; 0 0 7 : Z 2 1
0
OPT
R778
BLM18PG121SN1D
L906
OPT
1uF
25V
25V
OPT
C922
L907
37/42INCH
4.7K
32INCH
R774
4.7K
R772
37/42INCH
ERROR_OUT
008:AB20
1uF
25V
25V
C921
OPT
L905
32INCH
L908
0 . 1 u F
16V
OPT
C920
ERROR_OUT_10
A_DIM_10
DIM_10
AO4813
Q706
3
S1
2
G2
4
G1
1
S2
5
D1_1
6
D1_2
7
D2_1
8
D2_2
AO4813
Q404
2009_PWR
3
S1
2
G2
4
G1
1
S2
5
D1_1
6
D1_2
7
D2_1
8
D2_2
FM20020-24
2010_PWR
P701
19
12V
14
GND
9
3.5V
4
24V
18
INV ON
13
GND
8
GND
3
24V
17
12V
12
3.5V
7
GND
2
24V
16
GND/V-sync
11
3.5V
6
GND
1
PWR ON
20
A.DIM
15
GND
10
3.5V
5
GND
21
12V
22
P.DIM1
23
GND/P.DIM2
24
Err OUT
25
5V_ST
L4010
2010_PWR
L4011
2009_PWR
+3.5V_ST
+3.3V
3.3K
R741
2010_PWR
L4012
2010_PWR
L4013
2009_PWR
22uF
16V
C714
22uF
16V
C750
22uF
16V
C752
22uF
16V
C731
OPT
22uF
16V
16V
OPT
C730
C730
22uF
25V
25V
C755
22uF
16V
C792
22uF
16V
C791
22uF
16V
16V
C763
OPT
22uF
16V
C764
OPT
3216
22uF
16V
16V
OPT
C771
22uF
C787
OPT
22uF
C786
SIGN150
SIGN192
Power
4 1 4
P I R e s u l t
Placed on SMD-TOP
R2
R1
C l o s e t o I C
C l o s e t o I C
C l o s e t o I C
+5V_EXT
3A, DCR=0.025 ohm
C IN
+3.3V
Placed on SMD-TOP
C OUT
Placed on SMD-TOP
R 1 / R 2 : 2 7 K / 2 0 K = > V o u t = 1 . 8 8
C l o s e t o I C
S t a n d - b y + 3 . 3 V
R1
+5V & PANEL POWER
4.9A 0.0150OHM 34MHZ
V o u t = 0 . 8 * ( 1 + R 1 / R 2 )
+ 1 . 2 6 C o r e f o r S a t u r n 5
Placed on SMD-TOP
V o u t = 0 . 8 * ( 1 + R 1 / R 2 )
MAX 3A
R 1 / R 2 : 1 2 K / 9 . 1 K = > V o u t = 1 . 8 5
465 mA @85% efficiency
C l o s e t o I C
$ 0 . 2 4
C l o s e t o I C
1600 mA
R2
R1
R2
R 1 / R 2 : 1 5 K / 1 2 K = > V o u t = 1 . 8 0
$ 0 . 0 7
+ 1 . 8 V f o r S a t u r n 5 D D R
Placed on SMD-TOP
+5V_ST ON
MSTAR CORE ON
37LH250H
0 9 . 0 5 . 1 9
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