LG Electronics 32LS679C-ZC DVB-S2 LNB Part Allegro, OptionLNB, GP4LS7LR22011/11/02 DVBS27

Page 34

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 34

Contents READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS LD21BSERVICE MANUAL http//aic.lgservice.comSERVICING PRECAUTIONS CONTENTSSAFETY PRECAUTIONS SPECIFICATIONSAFETY PRECAUTIONS IMPORTANT SAFETY NOTICESERVICING PRECAUTIONS Electrostatically Sensitive ES DevicesSmall-Signal Discrete Transistor Removal/Replacement IC Remove/ReplacementReplacement Removal1. Application range SPECIFICATION4. Model General Specification 3. Test methodDVB-S2 8PSK / QPSK 2 ~ 45Msymbol/s Symbolrate 4.0Msymbols/s to 7.2Msymbols/ssymbolrate DVB-S QPSK 2 ~ 45Msymbol/s5.1. Component Input Y, CB/PB, CR/PR 5. Video resolutions 2D5.2. RGB Input PC 5.3. HDMI InputPC/DTV PCDVI1. Application Range ADJUSTMENT INSTRUCTIONBoot file Download 2. Designation3.2. EDID Download 3.1. ADC Process3.3. EDID data 7. ADC Calibration4.1. Adjustment Preparation 4. Total Assembly line process3.4 Function Check 5. HI-POT Test 4.3. Outgoing condition Configuration6.1. Signal Table 6. Model name & Serial number D/L7.1 MAC Address 7. MAC Address & CI+ key download6.3. Method & notice GP4LOW7.2 LAN Inspection 7.3. LAN PORT INSPECTIONPING TESTח ͷͲͳͤͤͤͪͥͣ͢͡ ͙;ͤ͛ͽͥͦ͑͟͝ͳͼ͑͝;ΒΔΙΚΟΖ͚ ח ͣ͢ͶͲ SCREW ASSEMBLY WORKING GUIDEScrew specification and application situation ח ͷͲͳͤͨͩͩͣ͑͢͡͡ ͙;ͧ͛ͽ͑͢͡͝ͳͼ͑͝;ΒΔΙΚΟΖ͚Side BLOCK DIAGRAMRear LG2111 AEXPLODED VIEW to delete CI or gate for GP4LS7LR22011.12.01Copyright 2012 LG Electronics. Inc. All rights reserved for SYSTEM EEPROMNormal Normal PowerVDDC DDR3+3.3VNormal FROM LIPS & POWER B/DPowerDET +1.5VDDRIR/LED and control for normal models USB1DIODES USB SIDEUSB2DIODES HDMI SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION RGB-PC / SPDIFTHE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF ISCOMMERCIAL/NonOS MODEL OPTION COMMERCIAL MODEL OPTION RS-232CFor Comsumer model, use 4PIN Wafer LVDS for large inch IC1201 S7LR2DIVXMS10GP4LS7LR22011/06/03 DDR25612 H5TQ1G63DFR-H9CSFLASHMAINMACRONIX Serial Flash for SPI bootSFLASHMAINWINBOND IC1401-*1 W25Q80BVSSIG PHONE Headphone *Option HEADPHONEHEAD Option name of this page CISLOT because of Hong Kong CI Region10067972-0500LF GP4LS7LR22011/06/14 ETHERNET21 H/W option ETHERNETETHERNET TU2601 GP4RGLOBALTUNERBLOCKTU2602TU2603 TDSS-G101D TDSN-G301D TDSQ-G001DGP4LS7LR22011/11/02 DVBS27 DVB-S2 LNB Part AllegroOptionLNB DCDCGND and AGND are connectedJK2801 SCART / COMPONENT&COMPSITFULL SCART / COMPONENT1 PSC008-01AUDIO AMPSTA380BWE Page Contents of LCD TV Standard Repair Process Error symptom Contents of LCD TV Standard Repair Process Detail Technical ManualContinue to the next page ContentMain B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable A. Video errorLCD TV A2 Check Power Board 24v outputBoard 3.5V,12V,20V voltages of PowerCheck various 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 ※ Check A8/ A9Check color by input -External Input COMPONENT -RGB Link CableConnect other external device and cable External device screen error-Color errorVertical/Horizontal bar, residual image, light spot Check color condition by input -External Input -Component RGBCheck Power On ‘”High” B. Power errorCheck Power LED Measure voltage of each output of Power B/DPOWEROFFABNORMAL1 Check Power Off ModeIf Power Off mode is not displayed Check Power B/D voltage POWEROFFCPUABNORMALCheck user menu Speaker off C. Audio error24V of Power 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 Recognition error Check input signalY Check technical Signal information input? - Fix information Replace Main B/DE. Noise Identify nose typeF. Exterior defect