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

Page 28

DVB-S2 LNB Part Allegro

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		[EP]	LNB		GNDLX

3A

+12V_LNB
LNB


L2700				LNB
33UH		LNB		LNB
33UH		LNB		C2712
SP-7850_33		C2711		C2712
2.4A		10uF		0.1uF
2.4A		10uF		50V
		25V		50V
		25V
				close to VIN pin(#25)
	DCDC_GND			close to VIN pin(#25)
	DCDC_GND		A_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
									BOOST		1
										VCP	THERMAL
										VCP	2	29
	LNB									TCAP	2	29
	LNB									TCAP	3
C2702											3		IC2700
0.1uF						LNB				NC_1	4		IC2700
						C2706				NC_1	4	A8290SETTR-T
						C2706
						22000pF
						22000pF				TDO	5			LNB
				A_GND						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

Image 28

Contents CHASSIS LD21C SERVICE MANUALREAD THE SAFETY PRECAUTIONS IN THIS MANUAL http//aic.lgservice.comCONTENTS SAFETY PRECAUTIONSSERVICING PRECAUTIONS SPECIFICATIONSAFETY PRECAUTIONS IMPORTANT SAFETY NOTICESERVICING PRECAUTIONS Electrostatically Sensitive ES DevicesIC Remove/Replacement ReplacementSmall-Signal Discrete Transistor Removal/Replacement RemovalSPECIFICATION 4. Model General Specification1. Application range 3. Test methodSymbolrate 4.0Msymbols/s to 7.2Msymbols/s symbolrateDVB-S2 8PSK / QPSK 2 ~ 45Msymbol/s DVB-S QPSK 2 ~ 45Msymbol/s5.1. Component Input Y, CB/PB, CR/PR 5. Video resolutions 2D5.2. RGB Input PC - LS35/LS34/CS46 series models are not supported 5.3. HDMI InputPC/DTV PCDVIADJUSTMENT INSTRUCTION Boot file Download1. Application Range 2. Designation3.1. ADC Process 3.3. EDID data3.2. EDID Download 7. ADC Calibration4.1. Adjustment Preparation 4. Total Assembly line process3.4 Function Check 4.2. EYE-Q function check 4.3. 3D function test4.4. IR emitter inspection Manual W/B process using adjust Remote control6.1. Signal Table 5. HI-POT Test6. Model name & Serial number D/L 5.1. HI-POT auto-check preparation7. MAC Address & CI+ key download 7.1 MAC Address7.2 LAN Inspection 7.3. LAN PORT INSPECTIONPING TESTRear SideLG2111 A IC101Applied Model **LM580T, **560T, **LS350T, **CS460T LS350T/CS460TTDSN G301DLS350S/CS460S 560S, **LS350S, **CS460SG001D EXPLODED VIEW IMPORTANT SAFETY NOTICEFROM LIPS & POWER B/D PowerDET+3.3VNormal +1.5VDDRLVDS for large inch 51Pin LVDS Connector For FHD 60Hz30Pin LVDS Connector FOR FHD REVERSE10bitS7LR2DIVXMS10 GP4LS7LR22011/06/03 DDR25612IC1201 H5TQ1G63DFR-H9CSerial Flash for SPI boot GP4LS7LR22011/06/03 SFLASH1MBOption name of this page CISLOT because of Hong Kong CI Region10067972-0500LF GP4LS7LR22011/06/14 ETHERNET21 H/W option ETHERNETETHERNET IR/LED and control for on.y ’12 sub without IR-OUT IR/CONTROLW/OIROUTGP4RGLOBALTUNERBLOCK TU2602TU2603 TDSS-G101D TDSN-G301DTU2601 TDSQ-G001DDVB-S2 LNB Part Allegro OptionLNBGP4LS7LR22011/11/02 DVBS27 DCDCGND and AGND are connectedAUDIO AMPSTA380BWE GP4LS7LR22011/11/16 AMPSTA380BWENAND FLASH MEMORY Normal Power VDDCNormal DDR3USB SIDE USB1DIODESHDMI2EANON SIDE HDMI HDMI1For CEC HDMI2Full Scart COMPONENTSCART AUDIO OUT SCART AUDIO MUTERS-232C 4PIN GP4LS7LR22011/09/262011/09/05 MSTART DEBUG4PINMSTAR DEBUG4PIN Page Contents of LCD TV Standard Repair Process Contents of LCD TV Standard Repair Process Detail Technical Manual Continue to the next pageError symptom ContentA. Video error LCD TVMain B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable A2 Check Power Board 24v outputvoltages of Power Check variousBoard 3.5V,12V,20V or 24V…Menu→ Set up→ Support → Signal Test Signal strength Normal over 50% By using Digital signal level meter By using Diagnostics menu on OSDSignal Quality Normal over 50% → Set-Top-Box, Different maker TV etc A8/ A9 Check color by input -External Input COMPONENT -RGB※ Check Link CableExternal device screen error-Color error Vertical/Horizontal bar, residual image, light spotConnect other external device and cable Check color condition by input -External Input -Component RGBB. Power error Check Power LEDCheck Power On ‘”High” Measure voltage of each output of Power B/DCheck Power Off Mode If Power Off mode is not displayed Check Power B/D voltagePOWEROFFABNORMAL1 POWEROFFCPUABNORMALC. Audio error 24V of PowerCheck user menu Speaker off Check audio B+In case of External Input signal error Check and fix external device Check audio B+ Voltage1. Remote controlR/C operating error D. Function errorCheck & Repair Check input signal Y Check technical Signal information input? - Fix informationRecognition error Replace Main B/DE. Noise Identify nose typeF. Exterior defect