LG 60LN549E Service Manual page 43

( O p t i o n : L N B )
LNB_OUT
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 © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
DVB-S2 LNB Part Allegro
LNB
LNB
D2702
ZD1
40V
40V SX34
2A
LNB LNB LNB LNB
C2701 C2713 C2705 C2707
0 . 0 1 u F 1uF 68uF 68uF
50V 50V 35V 35V
c l o s e t o B o o s t p i n ( # 1 )
DCDC_GND
DCDC_GND
LNB
D2703
MBR230LSFT1G
LNB
30V LNB
D2700
C2703
SX34
0 . 1 u F
LNB 40V
50V
C2700
0 . 2 2 u F
25V
A_GND
A_GND
A_GND
BOOST
1
THERMAL
VCP
2
LNB TCAP
3
C2702
0 . 1 u F LNB
NC_1
4
C2706
A8290SETTR-T
22000pF
TDO
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 . 1 u F
2.4A 10uF
50V
25V
c l o s e t o V I N p i n ( # 2 5 )
DCDC_GND
A_GND
NC_8
21
NC_7
29 20
BFC
19
IC2700
NC_6
18
LNB NC_5 OPT
17 A_GND
R2705
NC_4 0
16
NC_3
15
+3.3V_Normal
DCDC_GND
A_GND A_GND
LNB
R2704
4.7K
Max 1.3A
+12V/+15V
+12V_LNB
LNB
L2701
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
I n p u t t r a c e w i d t h s s h o u l d b e s i z e d t o c o n d u c t a t l e a s t 3 A
O u p u t t r a c e w i d t h s s h o u l d b e s i z e d t o c o n d u c t a t l e a s t 2 A
OPT
R2706
0
LP63xH-ZA 2 0 1 2 / 1 1 / 0 5
DVB_S 27
LGE Internal Use Only