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DVB-S2 LNB Part Allegro
(Option:LNB)
LNB
ZD1
40V
2A
LNB
D2703
MBR230LSFT1G
LNB_OUT
30V
LNB
C2700
0.22uF
25V
A_GND
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.
Copyright © 2012 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LNB
D2702
40V
SX34
LNB
LNB
LNB
LNB
C2701
C2713
C2705
C2707
0.01uF
1uF
68uF
68uF
50V
50V
35V
35V
close to Boost pin(#1)
DCDC_GND
DCDC_GND
LNB
LNB
D2700
C2703
SX34
0.1uF
40V
50V
A_GND
A_GND
BOOST
1
THERMAL
VCP
2
29
LNB
TCAP
3
C2702
IC2700
0.1uF
LNB
NC_1
4
C2706
A8290SETTR-T
22000pF
TDO
LNB
5
A_GND
EXTM
6
LNB_TX
TDI
7
A_GND
A_GND
3A
+12V_LNB
LNB
L2700
LNB
33UH
LNB
C2712
SP-7850_33
C2711
0.1uF
10uF
2.4A
50V
25V
close to VIN pin(#25)
DCDC_GND
A_GND
NC_8
21
NC_7
20
BFC
19
NC_6
18
NC_5
17
A_GND
R2705
NC_4
0
16
NC_3
15
+3.3V_Normal
A_GND
LNB
R2704
4.7K
+12V/+15V
BLM18PG121SN1D
DCDC_GND and A_GND are connected
DCDC_GND and A_GND are connected in pin#27
PCB_GND and A_GND are connected
Input trace widths should be sized to conduct at least 3A
Ouput trace widths should be sized to conduct at least 2A
R2706
0
DCDC_GND
A_GND
Max 1.3A
+12V_LNB
LNB
L2701
GP4L_S7LR2
DVB_S
2011/11/02
27
LGE Internal Use Only
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