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LG 42PN4500 Service Manual
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LG 42PN4500 Service Manual

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See also: Owner's Manual
PLASMA TV
SERVICE MANUAL
CHASSIS : PA31A
MODEL : 42PN4500
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL67687003 (1212-REV00)
North/Latin America
Europe/Africa
Asia/Oceania
42PN4500-TA
Internal Use Only
http://aic.lgservice.com
http://eic.lgservice.com
http://biz.lgservice.com
Printed in Korea

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Summary of Contents for LG 42PN4500

  • Page 1 Internal Use Only North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com PLASMA TV SERVICE MANUAL CHASSIS : PA31A MODEL : 42PN4500 42PN4500-TA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL67687003 (1212-REV00) Printed in Korea...

  • Page 2: Table Of Contents

    SPECIFICATION ..................4 ADJUSTMENT INSTRUCTION ..............6 BLOCK DIAGRAM .................. 14 EXPLODED VIEW .................. 15 SCHEMATIC CIRCUIT DIAGRAM .............. - 2 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 3: Safety Precautions

    An other abnormality exists that must be corrected before the receiver is returned to the customer. - 3 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 4: Specification

    1) Temp. : -20 ~ 60 deg 2) Humidity : 10 ~ 90 % Input Voltage AC100 ~ 240V, 50/60Hz Maker LG - 4 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 5 USB (1EA) for SVC, S/W Download, DivX only DVB-T2 (UK, Irend) Model PCMCI (1EA) DVB-T/C Decryption Interface, CI+ EU ONLY - 5 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 6: Adjustment Instruction

    -> If you push “Power on” key, TV set will recover channel information by itself. 3) After function inspection, Push “In-stop” key. - 6 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 7 * Display and Sound check is executed by Remote controller. * Caution : Not to push the INSTOP KEY after completion if the function inspection. - 7 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 8: Power Pcb Assy Voltage Adjustment

    Adjustment R/C POWER- ON -> Enter the mode of White-Balance, the pattern will come out. - 8 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 9 R/G/B Gain and Change the others. ■ When the adjustment is completed, Enter “COPY ALL”. ■ Exit adjustment mode using EXIT key on R/C. - 9 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 10 Digital : 1 Revision Digital : 3 * Caution : Never connect HDMI & D-sub Cable when EDID downloaded. - 10 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 11 * Checksum: Changeable by total EDID data. EDID C/S data 2D-HD HDMI check sum Block 0 0x3E (Hex) Block 1 0x24(HDMI1) 0x14(HDMI2) - 11 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 12 Sometimes model name or serial number is initialized.( Not always) There is impossible to download by bar code scan, so It need Manual download. - 12 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 13 Data 0 (2) check the key download for transmitted command (RS232 : ci 00 10) CMD1 CMD2 Data 0 - 13 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 14: Block Diagram

    BLOCK DIAGRAM - 14 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 15: Exploded View

    X-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only - 15 - Only for training and service purposes...
  • Page 16 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. SCART,CI Slot Copyright © 2012 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 17 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. JACK INTERFACE Copyright © 2012 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 18 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR Tuner block THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. TUNER Copyright © 2012 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 19 2012-06-201 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. MAIN Copyright © 2012 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 20 2012-06-01 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR Memory.LVDS,IR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2012 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 21 2012-06-01 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Power,AMP Copyright © 2012 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 22 2011/06/03 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR DDR_256 THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2012 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 24 1. L13 Concept(’12 Vs. ’13) 2. L13 Power On/Off sequence 3. L13 Power Block 4. L13 I2C MAP 5. L13 Front End Copyright © 2012 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 25 LVDS Wafer 3) HDMI 1 Jack is removed 4) Non-EU use Video(AV Jack) intead of SCART Jack HDMI Block Tact Key+LED+EYE+IR Copyright © 2012 LG Electronics Inc. All rights reserved. LGE Internal Use Only 1/11 Only for training and service purposes...
  • Page 26 40ms M_On 80ms 700ms VS_On 250ms 260ms VS_DET Signal Spec.(min) Measure Graph Remark VS_On 40ms RL_On 200ms 335ms M_On 30ms 56ms Copyright © 2012 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 27 Graph Remark RL_On M_On 80ms 87ms VS_On 250ms 280ms VS_DET Signal Spec.(min) Measure Graph Remark M_On 2500ms 3000ms RL_On 30ms 56ms Copyright © 2012 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 28 2. Screen On/Off sequence Signal Spec.(min) Measure Graph Remark VS_On 250ms 247ms VS_DET 400ms Signal Spec.(min) Measure Graph Remark M_On 2530ms 2600ms Copyright © 2012 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 29 Spec) 850mV↓ 12mVrms 116mVpp L616 L616 Audio 17.07V 120 Ohm C680 C686 C681 C690 C695 0.1uF 0.1uF 68uF 2012 1608 1608 8PI/6.3H Copyright © 2012 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 30 10uF 10uF 0.1uF 0.1uF 0.1uF 0.1uF Input Input Comp HDMI 2012 1005 1005 Comp HDMI 910mA 900mA 850mA 750mA 630mA 650mA Copyright © 2012 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 31 5V to 1.25V Tuner AP1117EG-13 C614 C625 C315 C314 (850mW) 10uF 10uF 0.1uF 10uF 6.3V 6.3V 1608 1608 1005 1005 1608 1608 Copyright © 2012 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 32 74mVpp 1.50V 120 Ohm C432 C436 C446 1608 0.1uF 10uF 0.1uF 1005 2012 1005 1005 Input Comp HDMI Copyright © 2012 LG Electronics Inc. All rights reserved. LGE Internal Use Only 145mA 105mA 105mA Only for training and service purposes...
  • Page 33 400mA(?) 1500mW LDO(T2) 1.25V(400mA) 850mW 3.3V 300mA 510mW 850mW 3.3V(300mA) 3.3V 300mA 510mW 850mW 1.5V(300mA) 3.3V 3.3V 1.5V 300mA 480mW 850mW Copyright © 2012 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 34 R453 2.2K R452 2.2K AA21 I2C_SCL I2C_SCKM2/DDCR_CK/GPIO72 AB21 AB21 I2C SDA I2C_SDA IC503 EEPROM (0xA0) IC503 EEPROM (0xA0) I2C SDAM2/DDCR DA/GPIO71 I2C_SDAM2/DDCR_DA/GPIO71 Copyright © 2012 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 35 TDSS-G201D TDSN-G301D SI2156 : PLL + ATV Demod SI2156 : PLL + ATV Demod : DVB-T/C Demod CXD2834 : DVB-T/C/T2 Demod Copyright © 2012 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 36 Digital Demod-T/C : DVBS_SI2166B Analog Demod : MSTAR 58 T/C/S Tuner Area T2/C Tuner Area T/C Tuner Area T/C Tuner Area Only Setellite Copyright © 2012 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...