LG 42PC3R Service Manual
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LG 42PC3R Service Manual

LG 42PC3R Service Manual

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PLASMA TV
SERVICE MANUAL
CHASSIS : PP62A
MODEL : 42PC3R
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
42PC3R-ZH
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html

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  • Page 1 PLASMA TV SERVICE MANUAL CHASSIS : PP62A MODEL : 42PC3R 42PC3R-ZH CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    CONTENTS SAFETY PRECAUTIONS ..................3 DESCRIPTION OF CONTROLS ................4 SPECIFICATIONS ....................10 ADJUSTMENT INSTRUCTIONS ...............12 TROUBLE SHOOTING GUIDE ................17 PRINTED CIRCUIT DIAGRAM ................25 BLOCK DIAGRAM .....................27 EXPLODED VIEW ....................28 EXPLODED VIEW PARTS LIST ................29 REPLACEMENT PARTS LIST................30 SCHEMATIC DIAGRAM..................

  • Page 3: Safety Precautions

    SAFETY PRECAUTIONS IMPORT ANT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by the Schematic Diagram and Replacement Parts List. It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.

  • Page 4: Description Of Controls

    Press the button and then OK button to select the desired input source ( TV , AV1 , AV2 , S-Video2 , AV3 , AV4 (except 42PC3R * ), Component , RGB , HDMI1/DVI or HDMI 2 ).
  • Page 5 Selects the remote operating modes. MODE INPUT POWER TELETEXT These buttons are used for teletext. INPUT BUTTONS For further details, see the ‘Teletext’ section. TEXT SIZE POSTION PIP PR- PIP PR+ PIP INPUT SWAP THUMBSTICK Allows you to navigate the on-screen menus and (Up/Down/Left adjust the system settings to your preference.

  • Page 6: Front Panel Controls

    Front Panel Controls PROGRAMME Buttons VOLUME Buttons OK Button MENU MENU Button INPUT INPUT Button ON/OFF Button Remote Control Sensor Power/Standby Indicator • illuminates red in standby mode. • illuminates white when the set is switched on.
  • Page 7 Back Connection Panel AUDIO Input AV IN 4 Connections are available for listen- ing stereo sound from an external device. AUDIO AUDIO L/MONO VIDEO Input VIDEO VIDEO Connects the video signal from a video device. (except 42PC3RV * ) AV 1 AV 2 AC IN VARIABLE...
  • Page 8 SLEEP Owner’s Manual Q.VIEW MUTE TIME REVEAL INDEX Polishing Cloth Owner’s Manual Batteries Remote Control Power Cord Polish the screen with the cloth (Option) For 42PC1R * , 42PC3R * , 50PC1R * 2-bolts for stand assembly 2-eye-bolts 2-Wall brackets...
  • Page 9 STAND INSTALLATION(OPTION) Place the set with the screen facing down on a cushion or soft cloth as shown in Figures 1. Before unfolding the stand, please make sure two locks (A) on the bottom of the stand push outward. Pull the stand out as shown above in Figures 2 ~ 3. After unfolding the stand, please insert and tighten the screws in the holes (B) on the bottom of the stand.

  • Page 10: Specifications

    42” Wide Color Display Module Plasma Display Panel Aspect Ratio 16:9 PDP Module PDP42X3, Clear Filter RGB Closed Type Operating Environment 1)Temp. : 0~40deg LGE SPEC. 2)Humidity : 0~85% Storage Environment 3)Temp. : -20~60deg 4)Humidity : 0~85% Input Voltage 100-240V~, 50/60Hz Maker : LG...
  • Page 11 1-2. 42”WVGA MODULE Item Specification Remark Display Screen Device 42” Wide Color Display Module Plasma Display Panel Aspect Ratio 16:9 PDP Module PDP42V8, Clear Filter RGB Closed Type Operating Environment 1)Temp. : 0~40deg LGE SPEC. 2)Humidity : 0~85% Storage Environment 3)Temp.

  • Page 12: Adjustment Instructions

    ADJUSTMENT INSTRUCTIONS 1. Application Object 3-2. Channel memory Method 1) Select “PDP” and “Hurricane” on Model dialog. And check These instructions is applied all of the 42” PLASMA TV, your connection in Communication dialog. (If your PP62A Chassis. connection is ‘NG’, then set your PORT(COM1,2,3,...) correctly.) 2.
  • Page 13 4. Auto AV(CVBS) Color Balance 5-3. Method of Auto RGB Color Balance 1) Input the Component 720p 100% Color Bar signal into Component1 or Component2. 4-1. Requirement 2) Set the PSM to Dynamic mode in Picture menu. It is very import to use correct adjustment pattern like (Fig.4). 3) Press INSTART key on R/C for adjustment.

  • Page 14: Adjustment Method

    7. POWER PCB Assy Voltage 8-3. Preparation for Adjustment 1) As above Fig. 8, Connect the Set, EDID Download Jig, PC Adjustments (Va, Vs Voltage adjustments) & Cable. 2) Turn on the PC & EDID Download Jig. And Execute the 7-1.
  • Page 15 8-5. Sequence of Adjustment If Assy has Scart jack ,Use AV3 Else use AV1. 1) Init the data. 3) Enter the White Balance adjustment mode by pressing the 2) Load the EDID data.( Open File : Analog ,Digital) INSTART key twice(White Balance) on R/C. 4) Stick sensor to center of the screen and select each items (Red/Green/Blue Gain and Offset) using (CH +/-) key...
  • Page 16 11-2. White Balance (89) (Fig. 12) Default Value on OSD 12. Power-off History 1) This function indicated Power off history. 2) You can go into this mode by ADJ key in ADJ remocon. (Fig. 13) Power-off History...

  • Page 17: Trouble Shooting Guide

    TROUBLE SHOOTING GUIDE 1. Power Board 1-1. The whole flowchart which it follows in voltage output state Start check Is it identical Doesn't the Is the Interface screen whole come with Power Off signal operated? out? condition? 1. Check the Power Off 2.
  • Page 18 1-2. Power Board Structure...
  • Page 19 2. No Power (1) Symptom 1) Doesn’t minute discharge at module. 2) Non does not come in into the front LED. (2) Check following Is plug in power cord? Plug in power cord. Is the Line Filter and Power Connect the Cable. Board Cable connected? Is the Fuse(F101) on Replace the Fuse.
  • Page 20 3. Protect Mode (1) Symptom 1) After once shining, it does not discharge minutely from module. 2) The Rely falls.(The sound is audible “click”) 3) It is converted with the color where the front LED is red from green. (2) Check following Is the Power Board Is output the normality Low/High Replace Power...
  • Page 21 4. No Raster (1) Symptom 1) Doesn’t minute discharge at module. 2) It maintains the condition where the front LED is green. (2) Check following Is the Power Board Is output the normality Low/High Replace the normal? voltage except Stand-by 5V? Power Board.
  • Page 22 5. In case of occurring strange screen into specific mode 5-1. In case the OSD does not displayed (1) Symptom 1) LED is green. 2) The minute discharged continuously becomes accomplished from module. (2) Check following Is the LVDS cable Is the LVDS cable Replace the cable.
  • Page 23 5-2. In case of does’t display the screen into specific mode (1) Symptom 1) The screen does not become the display from specific input mode. (RF, AV, Component, RGB, DVI) (2) Check following 1) Check the all input mode should become normality display. 2) Check the Video(Main)/Data(Sub), Video(Main)/Video(Sub) should become normality display from the PIP mode or DW mode.
  • Page 24 6. In case of no sound (1) Symptom 1) LED is green. 2) Screen display but sound is not output. (2) Check following Is the SPK cable Is the SPK cable Replace SPK cable normal? connected well? Cable inserts well. Is the RF/ AV/ Does IC400 Does IC401...

  • Page 25: Printed Circuit Diagram

    PRINTED CIRCUIT BOARD MAIN(TOP) CONTROL...
  • Page 26 MAIN(BOTTOM) PRE-AMP...

  • Page 27: Block Diagram

    BLOCK DIAGRAM...

  • Page 28: Exploded View

    EXPLODED VIEW...

  • Page 29: Exploded View Parts List

    PCB Assembly, Main M.I PP62A MAIN1 42PC1R-ZH KETLLMP CKD MANUAL INSERT FOR CKD 68719SMM58A PCB Assembly, Sub M.I PP62A SUB 42PC3R-ZH SETLLJP LOCALKEY MANUAL SKD 68719SMM83A PCB Assembly, Sub M.I PP62A SUB 42PC3R ZH LOCALKEY CTRL MANUAL CKD FOR LGEMA 68719SML93A PCB Assembly,Sub M.I PP62A SUB 42PC1R-ZH SETLLJP DMS SKD PREAMP 68719SMM71A PCB Assembly, Sub M.I PP62A SUB 42PC1R ZH PREAMP MANUAL CKD FOR LGEMA...

  • Page 30: Replacement Parts List

    REPLACEMENT PARTS LIST LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION Q202 0TR150400BA KTA1504S PNP -5V -50V -50V -0.15A Q203 0TR387500AA 2SC3875S NPN 5V 60V 50V 150MA 100NA IC1000 0IPRPML001A MIC39100-2.5WS MICREL 3P SOT223 Q204 0TR150400BA KTA1504S PNP -5V -50V -50V -0.15A IC1001 0IPMGRH001G BA33BC0FP 4.3TO16V 3.3V 1200MW...
  • Page 31 For Capacitor & Resistors, CC, CX, CK, CN : Ceramic RD : Carbon Film the charactors at 2nd and 3rd CQ : Polyestor RS : Metal Oxide Film digit in the P/No. means as CE : Electrolytic RN : Metal Film follows;...
  • Page 32 For Capacitor & Resistors, CC, CX, CK, CN : Ceramic RD : Carbon Film the charactors at 2nd and 3rd CQ : Polyestor RS : Metal Oxide Film digit in the P/No. means as CE : Electrolytic RN : Metal Film follows;...
  • Page 33 For Capacitor & Resistors, CC, CX, CK, CN : Ceramic RD : Carbon Film the charactors at 2nd and 3rd CQ : Polyestor RS : Metal Oxide Film digit in the P/No. means as CE : Electrolytic RN : Metal Film follows;...
  • Page 34 For Capacitor & Resistors, CC, CX, CK, CN : Ceramic RD : Carbon Film the charactors at 2nd and 3rd CQ : Polyestor RS : Metal Oxide Film digit in the P/No. means as CE : Electrolytic RN : Metal Film follows;...
  • Page 35 For Capacitor & Resistors, CC, CX, CK, CN : Ceramic RD : Carbon Film the charactors at 2nd and 3rd CQ : Polyestor RS : Metal Oxide Film digit in the P/No. means as CE : Electrolytic RN : Metal Film follows;...
  • Page 36 For Capacitor & Resistors, CC, CX, CK, CN : Ceramic RD : Carbon Film the charactors at 2nd and 3rd CQ : Polyestor RS : Metal Oxide Film digit in the P/No. means as CE : Electrolytic RN : Metal Film follows;...
  • Page 37 LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION 6631900050D Harness,SingleSMH200 SMH200 1000mM 2.00MM L1014 6200J000013 MLB-321611-0500P-N2 500OHM 6631900097G Harness,SingleSMH250 35097/35098 950_700mM L1015 6200J000013 MLB-321611-0500P-N2 500OHM 6631900098G Harness,SingleSMH250 35097/35098 1050_700mM L1016 6200J000013 MLB-321611-0500P-N2 500OHM 6631T25020L Harness,SingleSMH250 SMH250 250mM 2.50MM 13P L1017 6200J000013 MLB-321611-0500P-N2 500OHM...
  • Page 38 The components identified by mark critical for safety. Replace only with part number specified. LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION L401 6200J000013 MLB-321611-0500P-N2 500OHM ACCESSORIES L403 6200J000013 MLB-321611-0500P-N2 500OHM L500 6200JB8010L MLB-201209-1000L-N2 1000OHM 38289U0025B Manual, WESTERN EU USER LP61A 8LANS L501 6200JB8010L MLB-201209-1000L-N2 1000OHM...
  • Page 39 CORTEZ...
  • Page 40 DDR MEMORY...
  • Page 41 Apr., 2006 P/NO : 38289S0024B Printed in Korea...

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