Related Manuals for LG 42LY99
Summary of Contents for LG 42LY99
- Page 1 Internal Use Only website:http://biz.LGservice.com LCD TV SERVICE MANUAL CHASSIS : LD75C MODEL : 42LY99 42LY99-ZC CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
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Page 2: Table Of Contents
ADJUSTMENT INSTRUCTION ...............10 TROUBLE SHOOTING ................14 BLOCK DIAGRAM...................21 EXPLODED VIEW .................. 22 REPLACEMENT PARTS LIST ............... 24 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. - 3 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... -
Page 4: Servicing Precautions
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...
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Page 6: Specification
RGB-PC HDMI Input (3 EA) HDMI-DTV & SOUND Audio Input (3 EA) PC Audio, Component, AV L/R Input - 6 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... - Page 7 1920*1080 33.75 60.00 74.250 HDTV 1080I 1920*1080 28.125 50.00 74.250 HDTV 1080I 1920*1080 67.50 60.00 148.50 HDTV 1080P - 7 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
- Page 8 HDTV 1080P 50Hz 1920*1080 67.433 59.94 148.352 HDTV 1080P PC mode -> 1920*1080 67.500 148.500 HDTV 1080P Display 1920*1080 60Hz - 8 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
- Page 9 Input 1920*1200 60Hz ->No Signal 1920*1080 66.647 59.988 138.625 WUXGA Reduced Blanking Timing DTV mode -> 1080P Display - 9 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
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Page 10: Adjustment Instruction
This spec. sheet is applied to all of the LD75C chassis - This process should be done at insert process. If ADC Cal. is manufactured at LG TV Plant all over the world. not done at whole assembly line , you should do this process again. - Page 11 : ‘2006’ -> ‘10’ (d) Model Name(Hex): 42LY99 -> 000000FC0034323C5939390A202020202020 (e-1, e-2, f-1, f-2) Checksum: Changeable by total EDID data. - 11 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
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Page 12: White Balance
- Measurement color analyzer : CS1000 or CA210(CH 12) 6. White Balance * Test Equipment Color Analyzer (42LY99-ZC use WCG Panel. If you use CA- 210, CH.12 should be selected) : When you adjust LCD color temperature on Color analyzer (CA-210), you should use Channel 9 in NCG Module and Channel 12 in WCG. - Page 13 (When R/G/B GAIN are all 80, it is the FULL DYNAMIC Range of Module) 2) Check the Serial Number. Copyright © 2007 LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only Only for training and service purposes...
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Page 14: Troubleshooting
AC voltage marking to manual. When ST-BY 5V does not operate, replace the Power Board. Copyright © 2007 LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only Only for training and service purposes... - Page 15 Is the LVDS Reconnect the LVDS cable in P800. cable normal? Is the IC700 Replace the VSC. (FLI8548) Output normal? Copyright © 2007 LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only Only for training and service purposes...
- Page 16 Replace the VSC B/D . operate? normal? Replace the FIL8548 IC(IC700). Is the Ctrl Board of Module Replace the Ctrl B/D. normal? Copyright © 2007 LG Electronics. Inc. All right reserved. - 16 - LGE Internal Use Only Only for training and service purposes...
- Page 17 Block A Is the Input voltage, IIC Communication Is the FIL8548 Replace the IC. and HV sync normal? normal? Copyright © 2007 LG Electronics. Inc. All right reserved. - 17 - LGE Internal Use Only Only for training and service purposes...
- Page 18 Is the Input voltage, IIC Communication HDMI002 (IC1004) Replace the IC. and HV sync normal? normal? Same as Block A. Copyright © 2007 LG Electronics. Inc. All right reserved. - 18 - LGE Internal Use Only Only for training and service purposes...
- Page 19 (8) In the case of becomes unusual display from SCART2 mode Is Video input Check the input source. of the A/V jack(J1201) normal? Same as Block A. Copyright © 2007 LG Electronics. Inc. All right reserved. - 19 - LGE Internal Use Only Only for training and service purposes...
- Page 20 Check the signal before specific input? (except CXA2069 refer to circuit diagram HDMI,DTV,RF) Replace VSC B/D. Copyright © 2007 LG Electronics. Inc. All right reserved. - 20 - LGE Internal Use Only Only for training and service purposes...
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Page 21: Block Diagram
BLOCK DIGRAM Copyright © 2007 LG Electronics. Inc. All right reserved. - 21 - LGE Internal Use Only Only for training and service purposes... -
Page 22: Exploded View
EXPLODED VIEW Copyright © 2007 LG Electronics. Inc. All right reserved. - 22 - LGE Internal Use Only Only for training and service purposes... - Page 23 1.STi5100 S I i 5 1 0 0 D e c o u p l i n g C a p a c i t o r s 2.ST DDR 1.2V R242 1.2VA 002:C3;002:G4 LD_A[10] LDA[10] 1.2V AR200 L102 C166 HH-1M3216-501 10uF 1/16W...
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Page 24: Replacement Parts List
6.TUNER TDFC-G107P 5.POWER&DTV OUT [POWER BLOCK] TU600 I C 6 0 0 - * 1 TPS2031 TPS2031DR C612 OUT_3 C616 47uF 0.1uF IN_1 OUT_2 % MUST BE PLACED NEAR IC100 IN_2 OUT_1 5.0V For only C.I. IC600 GND_TU 5V_TU 3.3 volt TPS2010ADR 5.0V R652... - Page 25 5V_HDMI3 11.RGB&RS-232C 10.HDMI +5VST R1128-*1 IC1002 C1004 TP1377 AT24C02BN-10SU-1.8 0.1uF RGB_100ohm HDMI 5V Detection KDS184 D1001 R1125-*1 RGB_100ohm R1022 R1124-*1 5V_HDMI2 5V_HDMI1 5V_HDMI3 R1023 R1024 RGB_100ohm R1025 +3.3V_SWITCH TP1379 TP1375 R1018 TP1371 IC1100 R1016 J 1 1 0 0 R1020 SCL_HDMI_3 ZD1104 AT24C02BN-10SU-1.8...
- Page 26 13.AUDIO BLOCK P_3.3V +3.3V_PLL TP1468 TP1387 R1329 TP1342 1/10W C1352 C1350 C1351 0 . 1 u F 10uF 0 . 1 u F R1330 1/10W +9V_MSP4450 C1323 C1324 PLL_GND C1341 3.3uF C1319 R1304 R1305 3.3uF L1302 HH-1M3216-501 500-ohm C1343 C1344 C1345 ZD1300 RLZ8.2B-TE11...
- Page 28 Sep., 2007 P/NO : MFL39970803 Printed in Korea...