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LG 50PT81 Service Manual
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LG 50PT81 Service Manual

LG 50PT81 Service Manual

Chassis: pp7ba
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PLASMA TV
SERVICE MANUAL
CHASSIS : PP7BA
MODEL : 50PT81
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Internal Use Only
website:http://biz.LGservice.com
50PT81-ZB

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Summary of Contents for LG 50PT81

  • Page 1 Internal Use Only website:http://biz.LGservice.com PLASMA TV SERVICE MANUAL CHASSIS : PP7BA MODEL : 50PT81 50PT81-ZB CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    EXPLODED VIEW .................. 30 EXPLODED VIEW PARTS LIST ............31 REPLACEMENT PARTS LIST ............... 32 SVC. SHEET ....................PRINTED CIRCUIT DIAGRAM ..............Copyright©2007 LG Electronics. Inc. All right reserved. - 2 - 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. Copyright©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 3 - Only for training and service purposes...

  • Page 4: Specification

    1366 x 768 Pixels RGB strip arrangement 50X4P 1365 x 768 Pixels RGB strip arrangement Pixel Type RGB Closed type Copyright©2007 LG Electronics. Inc. All right reserved. - 4 - LGE Internal Use Only Only for training and service purposes...
  • Page 5 Audio Input (3 EA) PC Audio, Component (1EA), L/R Input SIDE AV(1EA) Audio variable out(1EA) SIDE(1EA) USB Input(1EA) DivX, MP3, JPEG Copyright©2007 LG Electronics. Inc. All right reserved. - 5 - LGE Internal Use Only Only for training and service purposes...

  • Page 6: Adjustment Instruction

    (5) Checking DVR Function and HDD * Check DVR Function as follow on 4-2 and find HDD failure under malfunction. Copyright©2007 LG Electronics. Inc. All right reserved. - 6 - LGE Internal Use Only Only for training and service purposes...
  • Page 7 * Press the FRONT-AV Key on R/C for converting input mode. (Change RS-232 Host : pc, BaudRate : 115200bps) - System control RS-232 Host should be “PC“ for adjustment. Copyright©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 7 -...
  • Page 8 00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 5. [5]-Checksum : Changeable by total EDID data Copyright©2007 LG Electronics. Inc. All right reserved. - 8 - LGE Internal Use Only...
  • Page 9 (5) Auto-RGB OK means the adjustment is completed. (5) Auto-RGB OK means the adjustment is completed. Copyright©2007 LG Electronics. Inc. All right reserved. - 9 - LGE Internal Use Only Only for training and service purposes...
  • Page 10 6,500K 0.313±0.002 0.329±0.002 +0.003 (Fig.7) ( R/G/B gain and R/G/B offset Default values are different in according to using module) Copyright©2007 LG Electronics. Inc. All right reserved. - 10 - LGE Internal Use Only Only for training and service purposes...
  • Page 11 G-Offset_Warm B-Offset_Warm R-Offset_Cool G-Offset_Cool B-Offset_Cool COLOR TEMP. 03h(Cool,Normal,Warm,User) W/B Adjustment Start Using Internal Pattern W/B Inner Pattern Signal Adjustment Completion Copyright©2007 LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only Only for training and service purposes...
  • Page 12 0~99 ACK is 0, there is Signal ACK is 1, there is No Signal ACK is 2, power Off Status Copyright©2007 LG Electronics. Inc. All right reserved. - 12 - LGE Internal Use Only Only for training and service purposes...
  • Page 13 Max:fe blue -0x6f green -0x80 Red,Blue,Green offset Jd,Je,Jf 00<90 Min:00 Initial Value : red -0x80 Max:fe blue -0x82 green -0x80 Copyright©2007 LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only Only for training and service purposes...
  • Page 14 Soft Touch Reserved Area Option Option1 Option2 Option3 Option4 System Control1 System Control2 System Control2 Power-off History Panel Control Fan Control Copyright©2007 LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only Only for training and service purposes...
  • Page 15 Time Control Recorded TV To Set Manual Recording To Set Scheduled List To Set Video Quality High HDD Format To Set Copyright©2007 LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only Only for training and service purposes...

  • Page 16: Troubleshooting

    After remove all cables connected PSU(except the CN101), authorizes the AC voltage marking manual. If the ST-by 5V does not operate, replace the PSU. Copyright©2007 LG Electronics. Inc. All right reserved. - 16 - LGE Internal Use Only Only for training and service purposes...
  • Page 17 After removing the P200, 210 and the output normal? 200, 210 connector of voltage is normal : Replace the Left X-B/D the X-B/D? Copyright©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 17 - Only for training and service purposes...
  • Page 18 Is there a fault with Reconnect the link cable in P600. the link cable? Is the output for the Replace the VSC. IC700 normal? Copyright©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 18 - Only for training and service purposes...
  • Page 19 5. In the case of an unusual display in rear AV mode(Main). Is video input of Check the input source. the A/V jack normal? Sam as Block A Copyright©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 19 - Only for training and service purposes...
  • Page 20 Is the video input of the A/V jack Check the input source. normal? (Check R339, R341,L310) Sam as Block A Copyright©2007 LG Electronics. Inc. All right reserved. - 20 - LGE Internal Use Only Only for training and service purposes...
  • Page 21 11. In the case of an unusual display in SCART 2 mode(main). Is the video input of Check the input source. the A/V jack normal? (Check R115) Sam as Block A Copyright©2007 LG Electronics. Inc. All right reserved. - 21 - LGE Internal Use Only Only for training and service purposes...
  • Page 22 Change the IC(IC700) 14. In the case PIP doesn’t display in other mode(Sub). - Same as the case of main except block A should be change to B Copyright©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 22 -...
  • Page 23 H, V sync of the Check the input source. JK500 normal?(Check R509, R511, R512, R513, R515) Change the IC(IC700) Copyright©2007 LG Electronics. Inc. All right reserved. - 23 - LGE Internal Use Only Only for training and service purposes...
  • Page 24 Is the IC401 Replace the IC401 operating normal? Is the IC402 Replace the IC402 operating normal? Replace the VSC B/D Copyright©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 24 - Only for training and service purposes...
  • Page 25 Normal video, Reset TMDS power down/ on register. Replace the IC1200. Normal audio? - 0x60, offset 0x3f : 0xf7 => 0xff Copyright©2007 LG Electronics. Inc. All right reserved. - 25 - LGE Internal Use Only Only for training and service purposes...

  • Page 26: Block Diagram

    BLOCK DIAGRAM Copyright©2007 LG Electronics. Inc. All right reserved. - 26 - LGE Internal Use Only Only for training and service purposes...
  • Page 27 MEMO Copyright©2007 LG Electronics. Inc. All right reserved. - 27 - LGE Internal Use Only Only for training and service purposes...

  • Page 28: Exploded View

    EXPLODED VIEW Copyright©2007 LG Electronics. Inc. All right reserved. - 28 - LGE Internal Use Only Only for training and service purposes...

  • Page 29: Exploded View Parts List

    EBR38628401 Hand Insert PCB Assembly, Main MAIN M.I PP7BA 50PT81-ZB - Hand Insert PCB Assembly EBR38628432 Hand Insert PCB Assembly, Main MAIN M.I PP79A 50PT81-ZB KEULLMP for poland Hand Insert PCB Assembly EBT38633701 Chassis Assembly, SUB PP7BA 50PT81-ZB HDD ASSY EBT38633732 Chassis Assembly, SUB PP79A 50PT81-ZB.KEULLMP for poland HDD ASSY...

  • Page 30: Replacement Parts List

    MVK6.3TP16VC100M 100uF 20% 16V 11 C1183 0CK103CK56A 0603B103K500CT 10nF 10% 50V X7R - C1108 0CE477WF6DC MVK10TP16VC470M 470uF 20% 16V 80M Copyright©2007 LG Electronics. Inc. All right reserved. - 32 - LGE Internal Use Only Only for training and service purposes...
  • Page 31 0CK104BF56A C1005X7R104KET 100nF 10% 16V X7R C1300 0CK104CK56A 0603B104K500CT 100nF 10% 50V X7R C1352 0CK104BF56A C1005X7R104KET 100nF 10% 16V X7R Copyright©2007 LG Electronics. Inc. All right reserved. - 33 - LGE Internal Use Only Only for training and service purposes...
  • Page 32 MVG6.3TP16VC220M 220uF 20% 16V 13 C1406 0CK102CK56A 0603B102K500CT 1nF 10% 50V X7R -5 C201 0CC270CK41A C1608C0G1H270JT 27pF 5% 50V C0G - Copyright©2007 LG Electronics. Inc. All right reserved. - 34 - LGE Internal Use Only Only for training and service purposes...
  • Page 33 C436 0CK682CK51A C1608Y5P1H682KT 6.8nF 10% 50V Y5P C314 0CK474CH94A 0603F474Z250CT 470nF -20TO+80% 25 C437 0CK682CK51A C1608Y5P1H682KT 6.8nF 10% 50V Y5P Copyright©2007 LG Electronics. Inc. All right reserved. - 35 - LGE Internal Use Only Only for training and service purposes...
  • Page 34 EAE33970001 CS1005X5R105K6R3NR 1uF 10% 6.3V X C492 0CK223CK56A UMK107JB223KA-T 22nF 10% 50V X7R C701 0CK104BF56A C1005X7R104KET 100nF 10% 16V X7R Copyright©2007 LG Electronics. Inc. All right reserved. - 36 - LGE Internal Use Only Only for training and service purposes...
  • Page 35 0CK103BH56A C1005X7R1E103KT- 10nF 10% 25V X7R C761 0CK104CK56A 0603B104K500CT 100nF 10% 50V X7R C903 0CE226WF6DC MVK5.0TP16VC22M 22uF 20% 16V 30MA Copyright©2007 LG Electronics. Inc. All right reserved. - 37 - LGE Internal Use Only Only for training and service purposes...
  • Page 36 CDS3C30GTH 30V 50V 120V 1.9A 1W S C959 0CK104BF56A C1005X7R104KET 100nF 10% 16V X7R ZD400 0DZRM00248A RLZ8.2B 8.2V 7.78TO8.19V 8OHM 500 Copyright©2007 LG Electronics. Inc. All right reserved. - 38 - LGE Internal Use Only Only for training and service purposes...
  • Page 37 KIA7029AF -0.3TO15V 2.9V 500MW SO L1113 6200J00005N Filter, HH-1M2012-121JT(H:1mm) 120OHM 2X1 IC901 EAN32205201 HY5DU281622FTP-5 128MBIT 8 x 16bi L1114 6200J00005N Filter, HH-1M2012-121JT(H:1mm) 120OHM 2X1 Copyright©2007 LG Electronics. Inc. All right reserved. - 39 - LGE Internal Use Only Only for training and service purposes...
  • Page 38 2SC3875S(ALY) NPN 5V 60V 50V 150M L500 EAM30764201 Filter, BG2012B102TF 1000ohm 2.0X1.25X0.8 Q203 0TR150400BA 2SA1504S(ASY) PNP -5V -50V -50V - Copyright©2007 LG Electronics. Inc. All right reserved. - 40 - LGE Internal Use Only Only for training and service purposes...
  • Page 39 MNR04M0ABJ330 33OHM 5% 1/16W 4 SM AL1318 0RZZH033273 MNR04M0ABJ330 33OHM 5% 1/16W 4 SM AR1501 0RJ0222C687 RCA86TRJ22R0 22OHM 5% 1/16W 4 SMD Copyright©2007 LG Electronics. Inc. All right reserved. - 41 - LGE Internal Use Only Only for training and service purposes...
  • Page 40 MCR01MZPJ330 33OHM 5% 1/16W 1005 R103 0RJ0000D677 MCR03EZPJ000 0OHM 5% 1/10W 1608 R R1214 0RJ1001D677 MCR03EZPJ102 1KOHM 5% 1/10W 1608 Copyright©2007 LG Electronics. Inc. All right reserved. - 42 - LGE Internal Use Only Only for training and service purposes...
  • Page 41 0RJ0332C678 MCR01MZPJ330 33OHM 5% 1/16W 1005 R1272 0RJ0222C678 MCR01MZPJ220 22OHM 5% 1/16W 1005 R1341 0RJ0332C678 MCR01MZPJ330 33OHM 5% 1/16W 1005 Copyright©2007 LG Electronics. Inc. All right reserved. - 43 - LGE Internal Use Only Only for training and service purposes...
  • Page 42 MCR01MZPJ202 2KOHM 5% 1/16W 1005 R144 0RJ0000D677 MCR03EZPJ000 0OHM 5% 1/10W 1608 R R160 0RJ2001C678 MCR01MZPJ202 2KOHM 5% 1/16W 1005 Copyright©2007 LG Electronics. Inc. All right reserved. - 44 - LGE Internal Use Only Only for training and service purposes...
  • Page 43 0RJ4701D677 MCR03EZPJ472 4.7KOHM 5% 1/10W 160 R2126 0RJ1502D677 MCR03EZPJ153 15KOHM 5% 1/10W 1608 R236 0RJ4700D677 MCR03EZPJ471 470OHM 5% 1/10W 1608 Copyright©2007 LG Electronics. Inc. All right reserved. - 45 - LGE Internal Use Only Only for training and service purposes...
  • Page 44 0RJ4703D677 MCR03EZPJ474 470KOHM 5% 1/10W 160 R354 0RJ1201C678 MCR01MZPJ122 1.2KOHM 5% 1/16W 100 R441 0RJ4703D677 MCR03EZPJ474 470KOHM 5% 1/10W 160 Copyright©2007 LG Electronics. Inc. All right reserved. - 46 - LGE Internal Use Only Only for training and service purposes...
  • Page 45 0RJ1000C678 MCR01MZPJ101 100OHM 5% 1/16W 1005 R505 0RJ4701D677 MCR03EZPJ472 4.7KOHM 5% 1/10W 160 R616 0RJ1000C678 MCR01MZPJ101 100OHM 5% 1/16W 1005 Copyright©2007 LG Electronics. Inc. All right reserved. - 47 - LGE Internal Use Only Only for training and service purposes...
  • Page 46 0RJ0222C678 MCR01MZPJ220 22OHM 5% 1/16W 1005 R726 0RJ0562D677 MCR03EZPJ560 56OHM 5% 1/10W 1608 R813 0RJ0222D677 MCR03EZPJ220 22OHM 5% 1/10W 1608 Copyright©2007 LG Electronics. Inc. All right reserved. - 48 - LGE Internal Use Only Only for training and service purposes...
  • Page 47 6631900098B Harness,SingleSMH250 110T/205T 900_500mM 2.50MM R871 0RJ0000C678 MCR01MZPJ000 0OHM 5% 1/16W 1005 R 6631900099C Harness,SingleSMH250 SMP250 400mM 2.50MM 3P UL1 Copyright©2007 LG Electronics. Inc. All right reserved. - 49 - LGE Internal Use Only Only for training and service purposes...
  • Page 48 6602T20008D Wafer, SMW200-05P 5P 2.00MM 1R STRAIGHT MFL39050006 Manual, Owners LAN(25)+HE MP HYE Simple Book MFL32995402 Manual, Owners MF056A LG HYE HE Wty Card-PDP only MKJ39170809 Remote Controller, COMPLEX ANALOG PVR R/C For Euro JACKs 3550V00590A Cover, MOLD ABS 50PC3DD-UE.AUSRSHR ABS...
  • Page 49 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 50 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 51 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 52 USB2_VBUS1 R108 C104 +C107 P105 POWER 330uF SMW200-05P R102 READY USB_DM USB2_VBUS1 1/10W C102 USB_DM R101 READY USB_DP C103 1/10W USB_DP Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 53 AMBER 5V_ST Y-GRN D101 SAM5670 R102 Q102 2SC3875S PRINTED CIRCUIT BOARD MAIN(TOP) MAIN(BOTTOM) SIDE A/V(BOTTOM) SIDE A/V(TOP) PRE-AMP(TOP) PRE-AMP(BOTTOM) CONTROL CONTROL Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 54 Sep., 2007 P/NO : MFL396403501 Printed in Korea...

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