LG 32LH250H Service Manual page 28

PStoPDF trial version. http://www.oakdoc.com
+3.5V_ST
PWR ON 24V
1 2 2010_PWR
L721
24V 24V
3 4
GND GND
5 6
GND GND
7 8
3.5V 3.5V
9 10 2010_PWR
3.5V 3.5V
11 12
GND GND INV_ON_DEBUG
13 14
GND GND/V-sync
15 16 A_DIM_10
12V INV ON DIM_10
17 18
12V A.DIM
ERROR_OUT_10
19 20
12V P.DIM1
21 22
GND/P.DIM2 Err OUT
23 24
P700
2010_PWR
FM20020-24
25
2009_PWR
FM20020-24
NC
P701 1
GND
3
GND
5
5.2V
7
5.2V
+12V
9
L707 GND
11
MLB-201209-0120P-N2
12V
OPT 13
GND
C731 15
C728 C722
C720
22uF 24V
0 . 1 u F 47uF
0 . 1 u F 17
16V
25V
NC
19
OPT
A.DIM
21
NC
23
25
C794
0 . 1 u F
50V
A_DIM_10
DIM_10
ERROR_OUT_10 L906
BLM18PG121SN1D
OPT
008:AB20
ERROR_OUT
37/42INCH
R772
C920 R773
4.7K
0 . 1 u F
0
OPT
OPT R775
0
OPT
32INCH
R774
4.7K
R2550
IC706
74LVC1G32GW
OPT B
1
RL_ON
0
008:AR33 R2541
A
OPT
2
RELAY_PTC OPT
0
004:Q27;009:U27 R2540
GND
3
+ 1 . 8 V f o r S a t u r n 5 D D R
+3.3V
IC701
SC4215ISTRT
NC_1 GND
BLM18PG121SN1D
1 8
L702
R710
3.3K EN ADJ
2 7
VIN VO
3 6
NC_2 NC_3
C712 4 5
C713
10uF 0 . 1 u F
10V
16V
R 1 / R 2 : 2 7 K / 2 0 K = > V o u t = 1 . 8 8
R 1 / R 2 : 1 5 K / 1 2 K = > V o u t = 1 . 8 0
R 1 / R 2 : 1 2 K / 9 . 1 K = > V o u t = 1 . 8 5
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.
+3.5V_ST
+5V_ST_PTC
+5V_ST_PTC
4.7K
R705
R411
OPT
RT1P141C-T112
L701
BG2012B121F
C795
OPT
220uF R706
3 1
16V R703
10K
SIGN192
0
C711 R708
2
15pF 33K
OPT
50V C
R702
Q700 B 10K
2SC3875S(ALY)
E
PWR ON
2
+5V_ST_PTC
GND
4
GND
6
L706
5.2V
8 OPT
5.2V C730
10 CB4532UK121E C726
2009_PWR 22uF
GND 220uF
12 +24V_AUDIO
16V
16V
12V 2009_PWR
14
GND
16 L704
CB4532UK121E
24V
18
INV ON
20
C727
C723
C721
Err OUT 68uF
22 1uF 68uF
35V
PWM_DIM 50V 35V
24
+3.3V
+5V_GENERAL
+3.3V_ST
2009_PWR
100
R714
C
INV_ON_DEBUG
R719
10K
Q702 B R759
2SC3052 C
R760
R776 Q708 B
10K
A_DIM E
4.7K
C921 2SC3875S(ALY)
008:AF11 OPT
1uF
25V
E
OPT
0 R777
L907
PWM_DIM
C922
0 0 8 : A F 1 1 ; 0 0 7 : O 2 0 ; 0 0 7 : Z 2 1
37/42INCH
1uF
25V
L908
0 R778
OPT
OPC_OUT
OPT
32INCH 0 0 7 : O 2 0 ; 0 0 7 : Z 2 1
0
+5V_ST_PTC
VCC
5
Y
OPT
4 OR_RELAY_ON
0
R2542
004:Q26
C2253
0 . 1 u F
16V
+1.8V_DDR
R713 C714 C715
22uF
9.1K 0 . 1 u F
16V 16V
1%
Placed on SMD-TOP
+5V & PANEL POWER
OPT
R771
0
POWER_ON_DELAY
OPT +12V
R751
0
RELAY_PTC
0 0 4 : E 1 4 ; 0 0 9 : U 2 7
OPT
POWER_ON/OFF1
0
R752 008:AR31;002:AE6;004:T24
+5V_ST
OR_RELAY_ON
0
R2543
004:L14
+3.3V_ST
Q703
R750 2SC3052
0
008:V17;004:Q28
R745 C
POWER_ON_DELAY 0 R726
10K
B
Q707
2SC3052
R746 0
OPT
POWER_ON/OFF1 C761 C762
E
008:AR31;002:AE6;004:Q27 4 . 7 u F 4 . 7 u F
6.3V 6.3V
OPT OPT
R728
10K
0
R727
10K
008:AR32
INV_CTL
008:AR32
OPT
+3.3V
+5V
OPT
R733
10K
V o u t = 0 . 8 * ( 1 + R 1 / R 2 )
IC704
R770
C411 C l o s e t o I C MP2212DN
82K
56K
560pF R1 R422
50V
FB EN/SYNC
1 8
R769
18K
R2
GND SW_2
1/10W
2 7
1%
IN SW_1
3 6
D700 OPT
BS VCC
4 5
C732
100V
22uF 1N4148W_DIODES
16V
OPT
Placed on SMD-TOP
C737
1uF
+ 1 . 2 6 C o r e f o r S a t u r n 5
+5V_GENERAL
465 mA @85% efficiency
+3.3V
MAX 3A
R738
1/10W
OPT
10K
R731
10K C790
C l o s e t o I C
1/10W 0 . 1 u F
V o u t = 0 . 8 * ( 1 + R 1 / R 2 )
R736 24K
IC705
C l o s e t o I C 1/8W
R723 MP2212DN
22K
R1
$ 0 . 0 7
4.9A 0.0150OHM 34MHZ
FB EN/SYNC
1 8
R722
75K L726
R2
1/8W 3.6uH
GND SW_2
1% 2 7
$ 0 . 2 4
NR8040T3R6N
IN SW_1
3 6
D703 OPT
BS VCC
4 5
C789
C786 C787 0 . 1 u F
C IN
100V
22uF 50V
22uF
OPT 1N4148W_DIODES
C788
1uF
+5V_ST
5V_ST
L715
C749
CB3216PA501E
L708
CB3216PA501E
0 . 1 u F
Q706
+5V_ST AO4813
L714
CB3216PA501E
S2 1 8 D2_2
C742
OPT
10uF
G2 2 7 D2_1
S1 3 6 D1_2
C752
22uF
16V
G1 4 5 D1_1
C
B
C743
4 . 7 u F
PANEL_POWER
E 25V
L728
CB3216PA501E
R740
47K
C748
C755
1uF
22uF
25V
25V
C
OPT
B Q705
2SC3052
Q704
C
2SC3052 E
B
E
+24V_AUDIO
+3.3V_FE
L727
BLM18PG121SN1D
+3.3V C780
0 . 1 u F
16V
1uF
10V
C412
Placed on SMD-TOP
L710
3.6uH
C763
Placed on SMD-TOP
22uF
NR8040T3R6N 16V
OPT
C750
22uF
16V
6.3V
C741
0 . 1 u F
50V
+5V_ST ON
+1.26V_VDDC
OPT
1600 mA
3A, DCR=0.025 ohm
L717
BLM18PG121SN1D
C OUT
002:AE6;002:AG13;009:N27
C791
C792
MSTAR_POWER_ON
22uF 22uF
16V 16V
Placed on SMD-TOP
S t a n d - b y + 3 . 3 V
+5V_ST
+5V
IC702
C758
C756
0 . 1 u F AP1117E33G-13
10uF
16V
+5V_GENERAL
IN ADJ/GND
3 1
C704 C705 2 C708
10uF
C757 10uF 0 . 1 u F
C760 OUT
C2254
10uF 10V 16V 6.3V
0 . 1 u F
16V
10V 16V
220uF
+3.3V_AVDD_MPLL
+3.3V_ST
MSTAR CORE ON
L703
BLM18PG121SN1D
C717
0 . 1 u F
16V
+5V_EXT
+12V
008:AR30;004:X17;005:AA6
OPT
R765
OPT
R762 100
POWER_EN
10K
C l o s e t o I C
1/10W
C767 OPT
1000pF
R763 68K
OPT
IC703 R1
C l o s e t o I C
MP2212DN
C l o s e t o I C
FB EN/SYNC
R761
1 8
13K
1/8W L737
R2
1% 3.6uH
GND SW_2
OPT
2 7
OPT
OPT
OPT
IN SW_1 C771
3 6 C772
22uF
0 . 1 u F
16V
16V
D704 OPT BS VCC 3216
C770
4 5
C764 0 . 1 u F OPT
50V
100V
22uF
OPT
16V 1N4148W_DIODES
+5V_GENERAL
OPT
OPT R767 OPT
10K
OPT
C768
1uF
OPT
+5V_GENERAL +5V_EXT
L736
CB3216PA501E
C765 C766 C769
10uF 0 . 1 u F 1uF
10V
16V 10V
+5V_ST_PTC +5V_ST_PTC
2009_PWR
Q404
AO4813
2009_PWR S2 1 8 D2_2
C405
C406
2 . 2 u F 100uF
G2 2 7 D2_1
25V 16V
S1 3 6 D1_2
G1 4 5 D1_1
2009_PWR
Q403
C
2SC3875S(ALY)
B
R413
10K
E
37LH250H 0 9 . 0 5 . 1 9
Power 4
+3.3V_ST
C710
0 . 1 u F
16V
+5V_EXT
OPT
C773
0 . 1 u F
16V
P I R e s u l t
+5V_ST
C407
220uF
16V
2009_PWR
1 4