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THERMAL
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.
A_GND
LNB_OUT
DCDC_GND
DCDC_GND
A_GND
A_GND
R6901 33
LNB
A_GND
+12V
LNB_TX
L6900
33UH
SP-7850_33
LNB
R6900 33
LNB
C6907 0.22uF
LNB
A_GND
C6902
1uF
50V
LNB
+12V_LNB
DCDC_GND
C6906
68uF
35V
LNB
A_GND
I2C_SDA4
C6905 22000pF
LNB
I2C_SCL4
A_GND
R6903
4.7K
LNB
D6901
40V
LNB_SMAB34
C6900
0.22uF
25V
LNB
C6901
0.01uF
50V
LNB
D6903
40V
LNB_SMAB34
L6901
BLM18PG121SN1D
LNB
IC6900
A8290SETTR-T
LNB
1
BOOST
3
TCAP
7
TDI
9
VREG
10
SDA
11
ADD
12
SCL
13
NC_2
14
IRQ
15
NC_3
16
NC_4
17
NC_5
18
NC_6
19
BFC
20
NC_7
21
NC_8
22
BFO
23
NC_9
24
BFI
25
VIN
26
LX
27
GNDLX
28
LNB
5
TDO
8
GND
6
EXTM
4
NC_1
2
VCP
29
[EP]
C6908 27pF
OPT
C6903 0.1uF
LNB
C6909
27pF
OPT
D6902
40V
LNB_SMAB34
A_GND
+3.3V_NORMAL
DCDC_GND
A_GND
+12V_LNB
A_GND
C6911
0.1uF
50V
LNB
C6904
0.1uF
50V
LNB
C6912
68uF
35V
LNB
D6900
30V
MBR230LSFT1G
LNB
R6906
2.2K
1W
LNB
D6904
LNB
C6910
10uF
25V
LNB
R6904
0
R6905
0
C6916
18pF
LNB
C6915
18pF
OPT
C6913
33pF
OPT
C6914
33pF
LNB
D6901-*1
40V
LNB_SX34
D6902-*1
40V
LNB_SX34
D6903-*1
40V
LNB_SX34
C6917
0.1uF
50V
LNB
C6918
0.1uF
50V
LNB
(Option:LNB)
DVB-S2 LNB Part Allegro
DCDC_GND and A_GND are connected in pin#27
3A
Max 1.3A
PCB_GND and A_GND are connected
Input trace widths should be sized to conduct at least 3A
2A
DCDC_GND and A_GND are connected
2.4A
close to Boost pin(#1)
Ouput trace widths should be sized to conduct at least 2A
close to VIN pin(#25)
69
LNB
2011.11.21
Close to Tuner
Surge protectioin
Copyright © 2012 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only