LG 32LV5500 Service Manual page 45

DVB-S2 LNB Part Allegro
(Option:LNB)
D2301
LNB SMAB34
2A
40V
C2307 C2302
0.01uF 1uF
50V 50V
LNB LNB
close to Boost pin(#1)
D2302
US1M(suzhou)
LNB_OUT
1000V
LNB
C2301
0.22uF
25V
A_GND
LNB_TX
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.
D2304
SMAB34
3A
40V
LNB
+12V_LNB
C2324 C2305
68uF 68uF
35V 35V
LNB
LNB LNB
L2301
33UH
SP-7850_33
2.4A
DCDC_GND
DCDC_GND
D2303
C2303
SMAB34
0.1uF
40V
50V
LNB LNB
A_GND
A_GND
BOOST NC_8
1 21
THERMAL
C2304 0.1uF
VCP NC_7
2 20
29
LNB
C2306 22000pF TCAP BFC
3 19
IC2301
LNB
NC_1 NC_6
4 18
A8290SETTR-T
TDO NC_5
LNB
5 17
A_GND
EXTM NC_4
6 16
TDI NC_3
7 15
R2304
4.7K
LNB
A_GND
C2312
C2311
0.1uF
10uF
50V
25V
close to VIN pin(#25)
LNB LNB
DCDC_GND
A_GND
A_GND
R2313
0
LNB
+3.3V_Normal
DCDC_GND
A_GND
Max 1.3A
+12V +12V_LNB
L2302
BLM18PG121SN1D
LNB
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
R2314
0
LNB
A_GND
BCM35230
LNB
2010.11.02
23 57