LG 42LY750H Service Manual page 48

EXTERNAL_POWER OUT 5V/12V
R9119
18K
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
Copyright © 2014 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
R9117
100K
Switching noise reducing [MPS recommend]
C9117 0.1uF
50V
IC9101
R9118
MP4460DQ-LF-Z EP_GND
22
close to pin
SW_1 BST
1 10
D9102
MBRA340T3G SW_2 VIN_2
2 9
EN VIN_1
3 8
R9121
200K
COMP FREQ
$0.21
4 7
C9118 1/8W
FB GND
150pF 1%
5 6
50V
R9122
R9120
270K
150K
1/16W
1%
L9105
C9119
R9124
22UH
C9120 20K
22uF
0.1uF 1/16W
25V
1%
50V
P_12V
close IC1800
IC9103
R9103
TPS54327DDAR
[EP]GND
10K
EXT5V_CTRL
EN VIN
1 8
C9107
R9113 R9112
0.1uF
VFB VBST
56K 11K
2 7
1% 1% 50V
C9112 VREG5 SW
100pF 3 6
SS GND
4 5
R9116
12K
1%
C9108
C9115
1uF
3300pF
10V
50V
Vout=(1+R1/R2)*0.765=5.03V
+24V
C9121 C9122
3.3uF 0.1uF
50V 50V
P_12V
L9106
R9123 CB3216PA501E
10K
1/16W
1%
C9111
10uF
EXT_5V
25V
+5V_CRUISE
CRUISE
L9107
L9104
BLM18PG121SN1D
3.6uH
NR8040T3R6N
C9103 C9101
22uF 22uF
16V 16V
R9104
75
IC9102
MP5000DQ
GND SOURCE_5
1 10
C9105
470pF
DV/DT SOURCE_4
50V 2 9
R9101
ENABLE/FAULT SOURCE_3
1K
3 8
EXT12V_CTRL
I-LIMIT SOURCE_2
4 7
NC SOURCE_1
5 6
P_12V
11
VCC
xxLY750H-ZA
5V/12V EXT.Power Out
EXT_12V
L9101
CB3216PA501E
C9109
0.1uF
50V
2013.12.27
91
LGE Internal Use Only