LG 49UF6400 Service Manual page 48

DVB-S2 LNB Part
(Option:LNB)
LNB_OUT
C6900 C6901
0.1uF 33pF
LNB LNB
Close to Tuner
Surge protectioin
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 © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
2A
LNB_SUZHOU
D6902-*2
SS2040LL-LG
40V
LNB_TSC
D6902
D6902-*1
LNB_ONSEMI
SS23L
30V
30V
C6903 C6905
0.01uF 10uF
50V 25V
40V
LNB LNB
SS2040LL-LG
close to Boost pin(#1)
D6901-*2
LNB_SUZHOU
30V
SS23L
D6901-*1
LNB_TSC
D6901
MBR230LSFT1G
30V
C6904 C6902
LNB_ONSEMI
0.22uF
0.1uF
R6900
25V
50V
LNB
2.2K
LNB
D6900 1W
LNB
LNB
3A
+12V_M
D6904-*1
Max 1.3A
LNB
40V
LPH6050T-150M-R
LNB_SX34
L6900
3.5A
D6904
15uH
40V
LNB_SMAB34
C6906 C6907
10uF 10uF
25V 25V
LNB LNB
A_GND
A_GND
A_GND
VCP VIN
1 15
THERMAL
LNB GND
2 21 14
D6903 NC_1 VREG
3 13
LNB_SMAB34 IC6900
40V TDI ISET
A8303SESTR-T
4 12
LNB
D6903-*1
TDO TCAP
5 11
LNB_SX34
40V
LNB_DMBT
+3.3V_NORMAL
NC_1 VIN
1 15
THERMAL
LNB 2 14 GND
21
NC_2 VREG
3 13
IC6900-*1
TDI DT1803 ISET
4 12
TDO TCAP
5 11
Input trace widths should be sized to conduct at least 3A
Ouput trace widths should be sized to conduct at least 2A
C6909
10uF
25V
LNB
close to VIN pin(#15) Caution!! need isolated GND
R6904
0
C6910
0.1uF
50V
LNB
A_GND
LNB
R6903
39K
1/16W
C6912
1%
LNB
0.1uF
+12V
C6913
0.1uF
50V
+3.3V_NORMAL
R6910
10K
OPT
1/16W
5%
LM14A(UF64/68)
LNB
NXP_Obsolete
Q6901
+12V_M
PMV48XP
C6914
R6911
36K 0.1uF
50V
AOS
Q6901-*1
R6909
AO3435
150K
C
B Q6902
MMBT3904(NXP)
C6915
E
4.7uF
10V
2015-01-21
69
LGE Internal Use Only