LG 37LH250H Service Manual page 29

FROM LIPS & POWER B/D
P700
FM20020-24
NC PWR ON
1 2
GND GND
3 4
GND GND
5 6
5.2V 5.2V
+12V 7 8
5.2V 5.2V
9 10
L707 GND GND
11 12
MLB-201209-0120P-N2
12V 12V
13 14
OPT
GND GND
C731 15 16
C728 C722
C720
22uF
0.1uF 47uF 24V 24V
0.1uF 17 18
16V
50V 25V
50V NC INV ON
19 20
OPT A.DIM Err OUT
21 22
NC PWM_DIM
23 24
L700
BG2012B080TF
A_DIM
25
008:AF11 R704
4.7K C706
C707
1uF 16V
C794
25V 0.1uF
0.1uF
OPT 50V
L733
BG2012B080TF
SIGN193
0 R743
PWM_DIM
008:AF11;007:P26;007:Y25 OPT
C725
1uF
0 R742 25V
OPC_OUT OPT
007:P25;007:Y25
R2550
74LVC1G32GW
B
OPT
1
RL_ON
R2541 0
008:AR33
A
OPT
2
RELAY_PTC
R2540 0
004:P27;009:U27
GND
3
+1.8V for Saturn5 DDR
+3.3V
IC701
SC4215ISTRT
NC_1 GND
BLM18PG121SN1D
1 8
L702
R710
EN ADJ
3.3K
2 7
VIN VO
3 6
NC_2 NC_3
C712 4 5
C713
10uF 0.1uF
10V
16V
R1/R2 : 27K / 20K => Vout=1.88
R1/R2 : 15K / 12K => Vout=1.80
R1/R2 : 12K / 9.1K => Vout=1.85
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.
+5V_ST_PTC +5V_ST_PTC
R705
4.7K
OPT
R411
RT1P141C-T112 OPT
L701
Q701
R771
BG2012B121F
0
POWER_ON_DELAY
OPT
3 1 R706
R703 OPT
10K SIGN192 ***Relay_PTC is high=> Relay On
0
C711
R708 2 R751
33K 0
15pF
OPT RELAY_PTC
50V C
004:E15;009:U27
R702
Q700 B 10K OPT
2SC3875S(ALY) POWER_ON/OFF1
R752 0
008:AR31;004:T24
E
R701
120K
OPT
OR_RELAY_ON
R2543 0
+5V_ST_PTC
L706
OPT +24V_AUDIO
C730
CB4532UK121E C726
22uF
220uF
16V
16V
L704
CB4532UK121E
C727
C723
C721
68uF 68uF
1uF
C719 35V 35V
50V
0.1uF
50V
+5V_GENERAL
+3.3V_ST
R714 100
R717
3.3K
R720
R715 10K
C
6.8K R719
OPT
Q702 B 10K 0
INV_ON_DEBUG R759
C *** INV_CTL is High => Inv On
2SC3052
R760
Q708 B 10K
E
2SC3875S(ALY)
OPT
R721
E 10K
OPT OPT
ERROR_OUT
R707 008:AB20
C709
R709 4.7K
0.1uF
0
16V
OPT
OPT
0
+5V_ST_PTC
IC706
VCC
5
OPT
Y
OPT
4 OR_RELAY_ON
R2542 0
004:P26
C2253
0.1uF
16V
+1.8V_DDR
R711
12K
1%
C714
R713 C715
22uF
9.1K 0.1uF
16V 16V
1%
Placed on SMD-TOP
C IN
+5V_+12V
+12V
L708
CB3216PA501E
+5V_ST
+5V_ST
R729
10K
R747
004:L14
10K R730
OPT
+3.3V_ST 560
Q703
R750 2SC3052
0
R718 B
008:V17;004:P28 10K
R745 0 C
POWER_ON_DELAY R726
10K
B
Q707
2SC3052
R746 0
POWER_ON/OFF1
C761 C762 OPT
R725 4.7uF E
008:AR31;004:P26 4.7uF
120K 6.3V 6.3V
OPT OPT OPT
R728
10K OPT
R727
10K
PANEL_CTL
008:AR32
INV_CTL
008:AR32
+3.3V
+5V
008:AR30;004:AM17;005:AA6
POWER_EN
OPT
R733
10K
Vout=0.8*(1+R1/R2)
IC704
1uF
C411 R770 Close to IC MP2212DN
82K 10V
56K
560pF R1 R422 C412
1/10W
50V
1%
FB EN/SYNC
1 8
R769
L710
18K
R2 3.6uH
GND SW_2
1/10W
2 7
1%
R421
NR8040T3R6N
100K
IN SW_1
3 6 5%
C741
D700 BS VCC
OPT
4 5 10nF
C732 C733 100V 50V
22uF 22uF 1N4148W_DIODES
16V OPT R737
47
R734
Placed on SMD-TOP
C737
10
1/10W 1uF
1%
10V
+1.26 Core for Saturn5
+5V_GENERAL
465 mA @85% efficiency
+3.3V
CB3216PA501E
MAX 3A
L711 R738
1/10W
OPT
10K
R731
10K C790
1/10W Close to IC 0.1uF
Vout=0.8*(1+R1/R2) 16V OPT
R736 24K
IC705 1/8W
Close to IC
R723
MP2212DN
22K
R1
1/10W $0.07
4.9A 0.0150OHM 34MHZ
1%
FB EN/SYNC
1 8
R722
75K L726
R2
1/8W 3.6uH
GND SW_2
1% 2 7
$0.24
NR8040T3R6N
IN SW_1
3 6
D703 OPT BS VCC
4 5
C789
C786
C787 10nF
100V
22uF 22uF 50V
1N4148W_DIODES
OPT
R744
47
R724
10
C788
1uF
16V
+5V_ST
L715
C749
CB3216PA501E
0.1uF
Q706
SI4925BDY
L714
CB3216PA501E
S1 1 8 D1_2
C742
C757
OPT
10uF
G1 2 7 D1_1
10uF
S2 3 6 D2_2
C752
22uF
16V
G2 4 5 D2_1
C
C743
R739
47K
4.7uF
PANEL_POWER
E 25V
L728
CB3216PA501E
R740
47K
R732
22K C748
C755
1uF
22uF
25V
25V
C
B Q705
2SC3052
Q704
2SC3052 C
E
B R735
22K
E
+24V_AUDIO +12V
L734 L735
CB3216PA501E CB3216PA501E
OPT
OPT
+3.3V_FE
L727
BLM18PG121SN1D
+3.3V C780
0.1uF
16V
Close to IC
Placed on SMD-TOP
C763 C764
Placed on SMD-TOP
22uF
22uF
16V
16V
OPT
OPT
C751 C750
C746
22uF
10uF 0.1uF
16V
16V
6.3V
+5V_ST ON
+1.26V_VDDC
1600 mA
3A, DCR=0.025 ohm
L717
BLM18PG121SN1D
C OUT
009:N27
C793
C791
C792 0.1uF
MSTAR_POWER_ON
22uF 22uF
16V 16V
Placed on SMD-TOP
Stand-by +3.3V
+3.3V_ST
+5V_ST
+5V
IC702
C758
C756
AP1117E33G-13
10uF 0.1uF
16V
+5V_GENERAL IN ADJ/GND
3 1
C708
C704 C705 2
10uF 0.1uF 10uF
OUT
C2254
C760 10V 6.3V
16V
0.1uF 16V
10V 16V 220uF
+3.3V_AVDD_MPLL
+3.3V_ST
MSTAR CORE ON
L703
BLM18PG121SN1D
C717
0.1uF
16V
+5V_EXT
008:AR30;004:X17;005:AA6
OPT
R765
R762 100
POWER_EN
10K
Close to IC
1/10W
C767
OPT
1000pF
R763 68K
OPT R1
IC703
Close to IC
MP2212DN
+5V_EXT
FB EN/SYNC
R761
1 8
13K
1/8W
L737
1% R2 3.6uH
GND SW_2
OPT
2 7
OPT
OPT OPT
OPT
IN SW_1 C771
3 6 C772 C773
22uF
0.1uF 0.1uF
16V
16V 16V
D704 OPT BS VCC 3225
C770
4 5
10nF OPT
100V 50V PI Result
OPT
1N4148W_DIODES
+5V_GENERAL
R764 47
OPT
R767 OPT
10K
R766 OPT
C768
1uF 10
10V
OPT
+5V_GENERAL +5V_EXT
L736
CB3216PA501E
C765 C766 C769
10uF 0.1uF 1uF
10V
16V 10V
+5V_ST
+5V_ST_PTC +5V_ST_PTC
Q404
SI4925BDY
S1 1 8 D1_2
R414
C405
22K C406
2.2uF
100uF
G1 2 7 D1_1
25V
16V
S2 3 6 D2_2
R415
2.2K
G2 4 5 D2_1
Q403
C
2SC3875S(ALY)
B
R413
10K
E
37LH250H 09.05.19
Power 4 14
C710
0.1uF
16V
C407
220uF
16V