LG 50UH5500 Service Manual page 59

LNB PART (DVB-S2)
OPTION ; LNB
LNB_OUT
C6900
0.1uF
LNB
Close to Tuner
Surge Protection
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 2016 LG Electronics Inc. All rights reserved.
Only for training and service purposes
D6902
LNB
40V
2A
C6903 C6905
0.01uF 10uF
50V 25V
LNB LNB
Closed to Boost Pin (#1)
D6901
SS2040LL-LG
40V
C6904
LNB
0.1uF
C6901 R6900
50V
LNB
2.2K
33pF
D6900 1W
C6902
LNB
LNB
LNB 0.22uF
LNB
25V
A_GND
A_GND
3A
+13V_M
LNB
LPH6050T-150M-R
D6904
L6900
SX34
40V 15uH
A_GND
LNB
C6906 C6907
10uF 10uF
25V 25V
LNB LNB
A_GND
VCP GND
1 12
THERMAL
LNB VREG
2 17 11
NC ISET
D6903
3 IC6901 10
LNB
A8305SESTR
IRQ TCAP
40V 4 LNB 9
Input trace widths should be sized to conduct at least 3A
Ouput trace widths should be sized to conduct at least 2A
Max 1.3A
C6909
10uF
25V
LNB
A_GND
Close to VIN pin (#15) Need Isolated GND
R6904
0
C6910
0.1uF
50V
LNB
A_GND
LNB
R6903
39K
1/16W
C6912
1%
LNB
0.1uF
+13V_M
+13V
+3.3V_NORMAL
K2H
LNB
LNB
Q6901
+13V_M
AO3435
C6913 C6915
R6910
0.1uF 36K 0.1uF
LNB
50V 50V
LNB
LNB
R6911
150K
LNB
LNB EBK61012601
C
R6909 LNB
10K
B Q6900
MMBT3904(NXP)
OPT
1/16W
5% C6914
E
4.7uF
10V
2014-08-25
20
LGE Internal Use Only