LG 55EG9600-UA Service Manual page 43

DVB-S2 LNB Part Allegro
(Option:LNB)
LNB_OUT
C6900 C6901
0.1uF 33pF
D6900
LNB 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 right reserved.
Only for training and service purposes
2A
LNB_TSC
D6902
D6902-*1
LNB_ONSEMI
SS23L
30V
30V
C6903 C6905 C6906
0.01uF 10uF 10uF
50V 25V 25V
LNB LNB LNB
close to Boost pin(#1)
30V
SS23L
A_GND
D6901-*1
LNB_TSC
D6901
MBR230LSFT1G
30V
D6903
C6904
LNB_ONSEMI
LNB_SMAB34
0.1uF
R6900
40V
LNB 50V
2.2K
1W
C6902
LNB 0.22uF
LNB D6903-*1
25V
LNB_SX34
40V
A_GND
A_GND
3A
+12V
D6904-*1
Max 1.3A
LNB
40V
LPH6050T-150M-R
LNB_SX34
L6900
3.5A
D6904
15uH
40V
LNB_SMAB34
C6909
10uF
C6907 25V
10uF
LNB
25V
LNB
A_GND
A_GND
close to VIN pin(#15)
C6910
0.1uF
50V
LNB
VCP VIN
1 15
THERMAL
LNB GND
2 21 14
NC_1 VREG
3 13
IC6900
TDI ISET
A8303SESTR-T
4 12
LNB_ALLEGRO
TDO TCAP C6912
5 11
LNB
0.1uF
+3.3V_NORMAL
NC_1 1 15 VIN
THERMAL
LNB GND
2 21 14
NC_2 VREG
3 13
IC6900-*1
TDI 4 DT1803 12 ISET
TDO LNB_DMBT 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
Caution!! need isolated GND
R6904
0
A_GND
LNB
R6903
39K
1/16W
1%
LM15U
LNB
2014-08-25
20
LGE Internal Use Only