LG Electronics 32LS350S DVB-S2 LNB Part Allegro, OptionLNB, GP4LS7LR22011/11/02 DVBS27, Max 1.3A

DVB-S2 LNB Part Allegro

(Option:LNB)

LNB	LNB
	D2702
ZD1
	40V
40V
	SX34

2A

LNB

D2703

MBR230LSFT1G

LNB_OUT 30V

LNB

C2700

0.22uF

25V

LNB	LNB		LNB	LNB
C2701	C2713	C2705		C2707
0.01uF	1uF		68uF	68uF
50V	50V		35V	35V
	close to	Boost pin(#1)
				DCDC_GND
			LNB		LNB
					D2700
			C2703
					SX34
			0.1uF
					40V
			50V
			A_GND

DCDC_GND

	[EP]	LNB	GNDLX
A_GND

3A

+12V_LNB
LNB
L2700				LNB
33UH		LNB
				C2712
SP-7850_33		C2711
2.4A		10uF		0.1uF
				50V
		25V
				close to VIN pin(#25)
	DCDC_GND
			A_GND

LX VIN BFI NC 9 BFO

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

A_GND

				BOOST		28	27	26	25	24	23	22
						1
					VCP	THERMAL
						2	29
	LNB				TCAP
						3
C2702								IC2700
0.1uF			LNB		NC_1	4
			C2706				A8290SETTR-T
			22000pF
					TDO	5			LNB
		A_GND

EXTM 6

LNB_TX

	TDI	7
		8	9	10		11		12	13	14
		GND	VREG	SDA		ADD		SCL		IRQ
A_GND									NC2
				33				33
					LNB				C2710 LNB
			C27080.22uF	R2701			OPT	R2702		OPT
				LNB	C270927pF
									27pF

A_GND

DEMOD SDA DEMOD SCL

21NC_8

20NC_7

19BFC

18 NC_6

17	NC_5		A_GND
	NC_4			R2705						R2706
16		0					0
15	NC_3
	+3.3V_Normal
							DCDC_GND
	LNB		A_GND						A_GND
	R2704
	4.7K						Max 1.3A
			+12V/+15V					+12V_LNB
						LNB
					L2701
				BLM18PG121SN1D

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

GP4L_S7LR22011/11/02

DVB_S27

LGE Internal Use Only