Read LG 32LH7000 / 32LH7020 / 32LH7030 (CHASSIS:LD91D) Service Manual online
0.1uF
50V
C842
PANEL_POWER
+5V_ST
+3.3V_ST
+5V_GENERAL
SI4925BDY
Q806
3
S2
2
G1
4
G2
1
S1
5
D
2_1
6
D
2_2
7
D
1_1
8
D
1_2
+12V
PANEL_CTL
001:AK20
+5V_ST
+5V_ST
10K
R832
OPT
10K
R829
+3.3V_AVDD_MPLL
POWER_ON/RL_ON
+5V_CI
+3.3V_ST
22K
R837
22K
R839
10K
R833
10K
R818
10K
R821
PWM_DIM
+5V_GENERAL
10K
OPT
R823
+24V
INV_CTL
1uF
25V
C804
OPT
A_DIM
001:W12
+3.3V_ST
10K
R822
1uF
25V OPT
C823
+1.8V_AMP
4.7K
R806
+12V
ERROR_OUT
0
OPT
R808
2SC3052
Q803
E
B
C
2SC3052
Q802
E
B
C
2SC3052
Q805
E
B
C
2SC3052
Q804
E
B
C
560
R835
10K
R834
10uF
C846
OPT
10K
R842
560
R843
BG2012B080TF
L800
BG2012B080TF
L805
100
R814
6.8K
OPT
R815
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.
+1.26V_VDDC
+5V_GENERAL
0.1uF
50V
C826
0.1uF
50V
OPT
C818
BLM18PG121SN1D
L803
+1.8V_MEMC
+1.26V_MEMC
0.1uF
16V
C827
0.1uF
16V
C803
0.1uF
16V
OPT
C807
0.1uF
16V
C808
0.1uF
16V
C869
0.1uF
16V
C859
0.1uF
16V
C815
0.1uF
C856
0.1uF
16V
C814
0.1uF
C854
0.1uF
C865
0.01uF
25V
C841
10uF
C862
10uF
10V
C802
10uF
16V
C845
MLB-201209-0120P-N2
L807
MLB-201209-0120P-N2
L804
MLB-201209-0120P-N2
L806
R855
OPT
+3.3V_ST
10K
R856
AP1117E33G-13
IC801
2
OUT
3
IN
1
ADJ/GND
1/10W
10K
R830
OPT
C837
OPT
22uF
C838
22uF
16V
C843
22uF
16V
C849
1/10W
10
1%
R826
10nF
50V
C836
BLM18PG121SN1D
L815
+5V_GENERAL
0.1uF
C844
+3.3V_CI
+3.3V_MEMC
0.1uF
16V
C852
BLM18PG121SN1D
L814
+3.3V
0.1uF
16V
C851
22uF 16V
C850
+5V_GENERAL
1K
R844
1/10W
33K
1%
R845
1/10W
27K
1%
R853
1/10W
30K
1%
R846
OPC_OUT1
22
R859
OPC_DISABLE
22
R860
OPC_ENABLE
+5V_ST
+5V_ST
+3.3V_ST
POWER_ON/RL_ON
10K
R802
10K
R805
10uF
10V
C867
16V
C855
OPT
0.1uF
50V
OPT
C813
+3.3V
1/10W
10K
R831
+12V
22uF
16V
OPT
C812
22uF
16V
C890
47uF
25V
C820
0.1uF
50V
C832
0.1uF
16V
C891
+3.3V
NR8040T3R6N
3.6uH
L813
22uF
C857
10nF
50V
C874
22uF
16V
C875
22uF
C861
1/10W
10
1%
R811
+1.8V_MEMC
22uF
16V
C873
AP1117E18G-13
IC803
2
OUT
3
IN
1
ADJ/GND
1/8W
75K
1%
R827
22
R857
OPT
OPC_OUT2
C892
OPT
BLM18SG121TN1D
L816
47
R862
47
R863
MP2212DN
IC805
3
IN
2
GND
4
BS
1
FB
5
VCC
6
SW_1
7
SW_2
8
EN/SYNC
MP2212DN
IC807
3
IN
2
GND
4
BS
1
FB
5
VCC
6
SW_1
7
SW_2
8
EN/SYNC
10uF
10V
C816
BLM18PG121SN1D
L821
0.01uF
25V
C882
0.1uF
16V
OPT
C805
CIC21J501NE
L823
CIC21J501NE
L822
CIC21J501NE
L818
CIC21J501NE
L812
CIC21J501NE
L811
BLM15BD121SN1
L801
2SC3052
Q800
E
B
C
10uF
6.3V
C806
10uF
6.3V
C822
10uF
6.3V
C876
10uF
6.3V
C879
10uF
6.3V
C896
10uF
6.3V
C898
C884
OPT
10K
R804
1uF
10V
C834
1uF
10V
C840
1uF
25V
C853
1uF
10V
C881
10uF
6.3V
C887
OPT
MP2212DN
IC804
3
IN
2
GND
4
BS
1
FB
5
VCC
6
SW_1
7
SW_2
8
EN/SYNC
22uF
C829
1/10W
10
1%
R858
10nF
50V
C830
NR8040T3R6N
3.6uH
L808
1/10W
10K
R809
22uF
C831
47
R810
1uF
10V
C828
10uF
6.3V
C810
1/10W
18K
1%
R841
1/10W
56K
1%
R840
1N4148W_DIODES
100V
D800
OPT
1N4148W_DIODES
100V
OPT
D802
1N4148W_DIODES
100V
OPT
D803
0
R803
POWER_ON_PM4
POWER_ON_DELAY
POWER_ON/RL_ON
SC4215ISTRT
IC802
3
VIN
2
EN
4
NC_2
1
NC_1
5
NC_3
6
VO
7
ADJ
8
GND
10uF
10V
C883
10K
R813
0.1uF
16V
C895
+3.3V
0.1uF
16V
C877
22uF
16V
C897
+1.8V_DDR
BLM18PG121SN1D
L820
RT1P141C-T112
Q801
1
2
3
33K
R807
OPT
1/8W
24K
1
%
R825
1/10W
22K
1%
R824
MLB-201209-0120P-N2
L810
10uF
16V
C847
100uF
16V
C824
100uF
16V
C885
FM20020-24
P800
19
14
9
4
18
13
8
3
17
12
7
2
16
11
6
1
20
15
10
5
21
22
23
24
25
APE8953MP
IC806
3
VOUT_1
2
FB
4
VOUT_2
1
GND
5
VIN
6
VCNTL
7
POK
8
EN
C819
C821
15K
1%
R816
12K
1%
R819
0.1uF
16V
C825
4.7uF
10V
C870
0.1uF
16V
OPT
C871
56K
1%
R847
0.01uF
50V
C848
22uH
L819
3225
22uF
16V
C858
10uF
16V
C835
0.1uF 50V
C868
MP2305DS
IC808
3
SW
2
IN
4
GND
1
BS
5
FB
6
COMP
7
EN
8
SS
0.1uF
16V
C863
+5V_EXT
5600pF
50V
C860
100K
R848
9.1K
R852
0.47uF
25V
C839
+12V
3225
22uF
16V
C864
1N4148W_DIODES
100V
D801
OPT
+5V_GENERAL
1/10W
10K
OPT
R854
+5V_GENERAL
1/10W
20K
R838
1/10W
2.7K
R836
1000pF
OPT
C878
1000pF
OPT
C866
1000pF
OPT
C872
SP-7850_2.2
2.2uH
L809
MLB-201209-0120P-N2
L817
+5V_GENERAL
12K
1%
R851
1/8W
9.1K
1%
R850
1/8W
12K
1%
R849
1000pF
OPT
C833
1000pF
OPT
C880
0
R870
0
R871
Stand-by +3.3V
+5V_+12V
FROM LIPS & POWER B/D
C1130
MAX 3A
S6 core 1.26 volt
1600 mA
465 mA @85% efficiency
Power
600 mA
+1.26V Core for MEMC
+1.8V_MEMC for DDR
8 10
MSD3369GV Platform
08/12/19 (MP)
C OUT
C IN
1.5mA
R1
R2
Vout=0.8*(1+R1/R2)
Placed on SMD-TOP
Placed on SMD-TOP
Placed on SMD-TOP
4.9A 0.0150OHM 34MHZ
$0.07
Placed on SMD-TOP
Replaced Part
R1
C OUT
Placed on SMD-TOP
C IN
R2
400 mA + 600 mA
$0.24
$0.24
About 1.84V
Close to IC
Close to IC
Close to IC
Vout=0.8*(1+R1/R2)
R1/R2 : 27K / 20K => Vout=1.88
R1/R2 : 15K / 12K => Vout=1.80
R1/R2 : 12K / 9.1K => Vout=1.85
3A, DCR=0.025 ohm
68uF/35V
105
105
68uF/35V
Close to IC
4.9A 0.0150OHM 34MHZ
R2
R1
Placed on SMD-TOP
Vout=0.8*(1+R1/R2)
$0.24
$0.07
+1.8V_DDR
R1
R2
Vout=0.923*(1+R1/R2)
Placed on SMD-TOP
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