LG 37LB7DF Service Manual

Chassis : lt75a

Hide thumbs

Table Of Contents

Quick Links

Download this manual

LCD TV

SERVICE MANUAL

CHASSIS : LT75A

MODEL : 37LB7DF

CAUTION

BEFORE SERVICING THE CHASSIS,

READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

37LB7DF-DA

Table of Contents

Summary of Contents for LG 37LB7DF

Page 1 LCD TV SERVICE MANUAL CHASSIS : LT75A MODEL : 37LB7DF 37LB7DF-DA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Page 2: Table Of Contents
ADJUSTMENT INSTRUCTION ...............12 TROUBLE SHOOTING ................17 BLOCK DIAGRAM...................25 EXPLODED VIEW .................. 29 REPLACEMENT PARTS LIST ............... 31 SVC. SHEET ....................Copyright © 2007 LG Electronics. Inc. All right reserved. - 2 - LGE Internal Use Only Only for training and service purposes...
Page 3: Product Safety
An other abnormality exists that must be corrected before the receiver is returned to the customer. Copyright © 2007 LG Electronics. Inc. All right reserved. - 3 - LGE Internal Use Only Only for training and service purposes...
Page 4 Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed to prevent potential shock reasons prior to applying power to the Copyright © 2007 LG Electronics. Inc. All right reserved. - 4 - LGE Internal Use Only...
Page 5 CAUTION: Maintain original spacing between the replaced component and adjacent components and the circuit board to prevent excessive component temperatures. Copyright © 2007 LG Electronics. Inc. All right reserved. - 5 - LGE Internal Use Only Only for training and service purposes...
Page 6: Specification
– 0 to 1400feet Storage Temperature -20 ~ 50 Altitude Environment Humidity 10 ~ 90 – 0 to 4000feet Copyright © 2007 LG Electronics. Inc. All right reserved. - 6 - LGE Internal Use Only Only for training and service purposes...
Page 7 Length(D) Height(H) Dimension Before Packing 1033.1 With Stant After Packing 1119 Product Only SET 27.5 With BOX 32.5 Copyright © 2007 LG Electronics. Inc. All right reserved. - 7 - LGE Internal Use Only Only for training and service purposes...
Page 8 - Picture : Dynamic (Cool) Cool 10000 11000 12000 Color pull in Range -500 +500 NTSC -500 +500 Color killer Sensitivity Copyright © 2007 LG Electronics. Inc. All right reserved. - 8 - LGE Internal Use Only Only for training and service purposes...
Page 9 2) Surrounding Brightness Level: dark 3) Surrounding Temperature: 25±2°C 4) Warm-up Time: 30 Min 5) Input Signal: HDMI 1920x1080p 60Hz Copyright © 2007 LG Electronics. Inc. All right reserved. - 9 - LGE Internal Use Only Only for training and service purposes...
Page 10 1280*1024 63.595 60.0 108.875 SXGA 1400*1050 65.160 60.0 122.50 SXGA 1920*1080 66.647 59.988 138.625 WUXGA Reduced Blanking Timing Copyright © 2007 LG Electronics. Inc. All right reserved. - 10 - LGE Internal Use Only Only for training and service purposes...
Page 11 SXGA 1400*1050 65.160 60.0 122.50 SXGA 1920*1080 66.647 59.988 138.625 WUXGA Reduced Blanking Timing DTV mode =>1080P Display Copyright © 2007 LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only Only for training and service purposes...
Page 12: Adjustment Instruction
Serial No 0x01 Month/Year 0x02 0x03 0x04 0x05 0x06 0x07 0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 Copyright © 2007 LG Electronics. Inc. All right reserved. - 12 - LGE Internal Use Only Only for training and service purposes...
Page 13 4.4 After changing the panel size, push the EXIT Key. 37LC7D 42LC7D Tool Option1 Tool Option2 1665 1665 Copyright © 2007 LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only Only for training and service purposes...
Page 14 5) Auto-RGB OK means the adjustment is completed. 5) Auto-RGB OK means adjustment is completed Copyright © 2007 LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only Only for training and service purposes...
Page 15 - In case of LCD, using ‘no signal’ or ‘full white pattern’ or the the mode of White-Balance, the pattern will come out. others, check the back light on Copyright © 2007 LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only...
Page 16 80. (When R/G/B GAIN are all 80, it is the FULL DYNAMIC Range of Module) Copyright © 2007 LG Electronics. Inc. All right reserved. - 16 - LGE Internal Use Only Only for training and service purposes...
Page 25: Block Diagram
MSP4450K RGBHV PC SOUND SDRAM 256Mbit Flash memory 32Mbit S-VIDEO AV1 CVBS AV1 LR TUNER CVBS TDFB-T102P ‘TAUV-H301P Copyright © 2007 LG Electronics. Inc. All right reserved. - 25 - LGE Internal Use Only Only for training and service purposes...
Page 29: Exploded View
X-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. LGE Internal Use Only - 29 - Copyright LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 30 "Capacitor,Ceramic,Chip" C2012C0G1H101JT 100pF C527 0CE107WF6DC "Capacitor,AL,Chip" MVK6.3TP16VC100M 100uF C100 0CH5101K416 "Capacitor,Ceramic,Chip" C2012C0G1H101JT 100pF C528 0CE227WF6DC "Capacitor,AL,Chip" MVK8.0TP16VC220M 220uF Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 31 - Only for training and service purposes...
Page 31: Replacement Parts List
C1352 0CK104CK56A "Capacitor,Ceramic,Chip" 0603B104K500CT 100nF 1 C123 0CK104CF56A "Capacitor,Ceramic,Chip" 0603B104K160CT 100nF 1 C1353 0CK472CK56A "Capacitor,Ceramic,Chip" 0603B472K500CT 4.7nF 1 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 32 - Only for training and service purposes...
Page 32 C178 0CK104CF56A "Capacitor,Ceramic,Chip" 0603B104K160CT 100nF 1 C145 0CK104CF56A "Capacitor,Ceramic,Chip" 0603B104K160CT 100nF 1 C179 0CK104CF56A "Capacitor,Ceramic,Chip" 0603B104K160CT 100nF 1 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 33 - Only for training and service purposes...
Page 33 C726 0CK104CK56A "Capacitor,Ceramic,Chip" 0603B104K500CT 100nF 1 C429 0CK104CK56A "Capacitor,Ceramic,Chip" 0603B104K500CT 100nF 1 C728 0CK104CK56A "Capacitor,Ceramic,Chip" 0603B104K500CT 100nF 1 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 34 - Only for training and service purposes...
Page 34 C874 0CK104BF56A "Capacitor,Ceramic,Chip" C1005X7R104KET 100nF 1 C791 0CK104BF56A "Capacitor,Ceramic,Chip" C1005X7R104KET 100nF 1 C875 0CK104BF56A "Capacitor,Ceramic,Chip" C1005X7R104KET 100nF 1 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 35 - Only for training and service purposes...
Page 35 "Diode,Zener" GDZJ5.1B 5.1V 4.94TO5. L1105 6210TCE001P "Filter,Bead" HB-1S2012-121JT(H:1mm) ZD1300 0DZRM00248A "Diode,Zener" RLZ8.2B 8.2V 7.78TO8.1 L1106 6210TCE001P "Filter,Bead" HB-1S2012-121JT(H:1mm) Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 36 - Only for training and service purposes...
Page 36 Q606 0TR150400BA "TR,Bipolar" 2SA1504S(ASY) PNP -5V L1408 EAM37276902 "Filter,LCR" LCF20P101-TM LPF(EMI) Q800 0TR387500AA "TR,Bipolar" 2SC3875S(ALY) NPN 5V 6 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 37 - Only for training and service purposes...
Page 37 "Resistor,Chip" MCR10EZHJ000 0OHM 5% 1 R104 0RD1100Q609 "Resistor,Carbon Film" RDM94T1J110R 110OHM 5% R110 0RJ1002D677 "Resistor,Chip" MCR03EZPJ103 10KOHM 5% Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 38 - Only for training and service purposes...
Page 38 0RJ2402D677 "Resistor,Chip" MCR03EZPJ243 24KOHM 5% R1171 0RJ0000D677 "Resistor,Chip" MCR03EZPJ000 0OHM 5% 1 R1302 0RJ4700D677 "Resistor,Chip" MCR03EZPJ471 470OHM 5% Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 39 - Only for training and service purposes...
Page 39 0RJ1000D677 "Resistor,Chip" MCR03EZPJ101 100OHM 5% R1401 0RJ4701D677 "Resistor,Chip" MCR03EZPJ472 4.7KOHM 5 R1486 0RJ0000D677 "Resistor,Chip" MCR03EZPJ000 0OHM 5% 1 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 40 - Only for training and service purposes...
Page 40 "Resistor,Chip" MCR10EZHJ000 0OHM 5% 1 R1729 0RJ0332D677 "Resistor,Chip" MCR03EZPJ330 33OHM 5% R1796 0RH0000D622 "Resistor,Chip" MCR10EZHJ000 0OHM 5% 1 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 41 - Only for training and service purposes...
Page 41 R606 0RJ0332D677 "Resistor,Chip" MCR03EZPJ330 33OHM 5% R236 0RJ1000D677 "Resistor,Chip" MCR03EZPJ101 100OHM 5% R607 0RJ0332D677 "Resistor,Chip" MCR03EZPJ330 33OHM 5% Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 42 - Only for training and service purposes...
Page 42 R818 0RJ1002D677 "Resistor,Chip" MCR03EZPJ103 10KOHM 5% R745 0RJ1002D677 "Resistor,Chip" MCR03EZPJ103 10KOHM 5% R818 0RJ4702D677 "Resistor,Chip" MCR03EZPJ473 47KOHM 5% Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 43 - Only for training and service purposes...
Page 43 "Harness,Single" SMH250-03 SMH250-03 30 X1300 156-A02R Crystal EUA18.4320F16E33L 18.4 6631T25023R "Harness,Single" 6631T25023R SMH250 SMH X700 6212AB2015J Crystal HC-49SM 19.66080HZ 19. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 44 - Only for training and service purposes...
Page 48 Nov., 2007 P/NO : MFL39065803 Printed in Korea...

This manual is also suitable for:

37lb7df-da

LG 37LB7DF Service Manual

Quick Links

Related Manuals for LG 37LB7DF

Summary of Contents for LG 37LB7DF

This manual is also suitable for: