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LG 42PX5R Service Manual
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LG 42PX5R Service Manual

LG 42PX5R Service Manual

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PLASMA TV
SERVICE MANUAL
CHASSIS : MF-056B
MODEL : 42PX5R
42PX5R-ZB
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html

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  • Page 1 PLASMA TV SERVICE MANUAL CHASSIS : MF-056B MODEL : 42PX5R 42PX5R-ZB 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 ....................9 ADJUSTMENT INSTRUCTIONS ...............11 TROUBLE SHOOTING GUIDE ................16 BLOCK DIAGRAM .....................24 EXPLODED VIEW ....................26 EXPLODED VIEW PARTS LIST ................27 REPLACEMENT PARTS LIST................28 SCHEMATIC DIAGRAM..................PRINTED CIRCUIT BOARD .................. - 2 -...

  • 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

    DESCRIPTION OF CONTROLS INPUT POWER Selects the TV, AV1, AV2, S-Video, AV3, AV4, switches the set on from standby or off to AV5, Component, RGB or HDMI modes. standby. switches the set on from standby. MULTIMEDIA INPUT MULTIMEDIA Selects the Component, RGB or HDMI MODE POWER modes.
  • Page 5 <Front Panel Controls> INPUT MENU 1. Remote Control Sensor 7. INDEX Switches FRONT Display on or off. 2. Power Button Switches the set on from standby or off to standby. 8. Power Indicator Illuminates red in standby mode, illuminates green when 3.
  • Page 6 <Back Panel> A A V5 S-VIDEO VIDEO VIDEO AUDIO AUDIO AC INPUT A A V1 HDMI/ Antenna COMPONENT COMPONENT AUDIO AUDIO AUDIO INPUT RGB INPUT DVI(VIDEO) A A V2 V VARIABLE ARIABLE AUDIO OUT AUDIO OUT RS-232C INPUT REMOTE CONTROL (CONTROL/SERVICE) A A V4 A A V3...
  • Page 7 Accessories TV/AV MULTIMEDIA POWER MODE CABLE FAVOURITE Q.VIEW SIZE POSITION INDEX HOLD TIME REVEAL MODE Owner’s Manual Remote Control handset 2-Eye Bolts 1.5V Alkaline batteries Power Cord 2-Wall brackets Joining the set assembly to the wall to prevent the set tumbling - Secure the set assembly by joining it to a wall by using the Eye Bolts/Wall brackets.

  • Page 8: Specifications

    SPECIFICATIONS NOTE : Specifications and others are subject to change without notice for improvement. Application Range This spec is applied to the 42”/50” PDP TV used MF-056B Chassis. Specification Each part is tested as below without special appointment. 1) Temperature : 25±5°C (77±9°F), CST : 40±5 2) Relative Humidity: 65 ±...
  • Page 9 2. Model Specification Remark Item Specification Market Non-EU Broadcasting system PAL B/G/I/D/K, NTSC Available Channel BAND NTSC VHF/UHF C1~C69 2~83 CATV S1~S47 1~71 Receiving system Upper Heterodyne Video Input (2EA) PAL, SECAM, NTSC 4 System : PAL, SECAM, NTSC,PAL60 Video Output(1EA) PAL, SECAM, NTSC 5 System : PAL, SECAM, NTSC,PAL60 S-Video Input(2EA)

  • Page 10: Adjustment Instructions

    ADJUSTMENT INSTRUCTIONS 1. Application Object 3-2. Channel memory Method 1) Select “PDP” and “Hurricane” on Model dialog. And check These instructions apply to the MF-056B Chassis. your connection in Communication dialog. (If your connection is ‘NG’, then set your PORT(COM1,2,3,...) 2.
  • Page 11 2) Connect RS-232C cable and turn on the power. (Use the special Cable For Sub-program) (If your connection has completed, you can see “Ready”) 3) Select proper ‘Model’ for each model. 4) Select ‘flash file’ for each model. 5) Click the [download] button It means the completion of the ROM download if all item show ‘OK’...
  • Page 12 5.4. Sequence of Adjustment 7. Adjustment of White Balance (1) DDC data of Analog-RGB 7-1. Required Equipment 1) Init the data 1) Remote controller for adjustment 2) Color Analyzer (CA-100 or same product) 3) Auto W/B adjustment instrument(only for auto adjustment) 4) AV Pattern Generator 7-2.
  • Page 13 8-3. Method of Auto Component Color Balance 7) Adjust Only High Light with R Gain/ B Gain using (VOL+/-) key on R/C. 1) Input the Component 720p 100% Color Bar signal into 8) Adjust it until color coordination becomes as below. Component1 or Component2.
  • Page 14 9. Default Value in Adjustment mode 9-1. Auto Color Balance (Component/RGB) Auto Color Balance(HEX) Auto-RGB To Set Source Cortez Offset1 Green Offset1 Blue Offset1 Offset2 Green Offset2 Blue Offset2 Gain Green Gain Blue Gain Reset To Set (Fig. 12) Default Value on OSD 9-2.

  • Page 15: Trouble Shooting Guide

    TROUBLE SHOOTING GUIDE 1. Power Board 1-1. The whole flowchart which it follows in voltage output state Start check Doesn't the Is it identical Is the Interface with Power Off screen whole come signal operated? out? condition? 1. Check the Power Off 2.
  • Page 16 1-2. Sony Power Board Structure T502: Vs Trans T702: Va Trans T101: St-by Trans T103: Low Voltage Trans - 16 -...
  • Page 17 1-3. Sanken, LGIT Power Board Structure T221: Vs Trans T271: Va Trans T121: St-by Trans T201: Low Voltage Trans - 17 -...
  • Page 18 2. No Power (1) Symptom Does’t minute discharge at module. ¯ 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 19 3. Protect Mode (1) Symptom After once shining, it does not discharge minutely ¯ from module The Rely falls(The sound is audible “click”) ¯ 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 20 4. No Raster (1) Symptom Does’t minute discharge at module. ¯ 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 21 5. In case of occurring strange screen into specific mode 5-1. In case the OSD does not displayed (1) Symptom LED is green ¯ The minute discharged continuously becomes ¯ accomplished from module (2) Check following Is the LVDS cable Is the LVDS cable Replace the cable.
  • Page 22 5-2. In case of does’t display the screen into specific mode (1) Symptom The screen does not become the display from specific input mode ¯ (RF, AV, Component, RGB, DVI). (2) Check following Check the all input mode should become normality display. ¯...
  • Page 23 6. In case of no sound (1) Symptom LED is green ¯ 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 24 6. In case of no normal XSTUDIO (1) Symptom LED is green ¯ Don’t enter EPF mode ¯ Screen display but sound is not output ¯ (2) Check following Is the EPF cable Is the EPF cable Replace EPF cable normal? connected well? Cable inserts well.

  • Page 25: Block Diagram

    BLOCK DIAGRAM - 25 -...

  • Page 26: Exploded View

    EXPLODED VIEW - 26 -...

  • Page 27: Exploded View Parts List

    3301V00055A 3301V00055A PLATE ASSEMBLY, AV 3301V00053 3301V00054 RZ-42PX40 ASSY 6871VMMD74A 6871VMMD74A PWB(PCB) ASSEMBLY,MAIN MF-056B 42PX5R-ZB 6871VSMS63A 6871VSMS63A PWB(PCB) ASSEMBLY,SUB CONT T.T MF056B 42PX5R-TB HURRICANE 2 5020V01022A 5020V01022B BUTTON, “CONTROL RZ-42PX40 ABS, AF-303S 8KEY 3141VSNF52A 31419SF046A CHASSIS ASSEMBLY, SUB EPF 6871VSMS64A 6871VSMS64A PWB(PCB) ASSEMBLY,SUB LED/PHOTO MF056A INDEX.

  • Page 28: Replacement Parts List

    0TR387500AA IC1300 0IMCRTH003A THC63LVD104A 64P TQFP Q102 0TR102008AA KRA102S R/TP KEC SOT23 CHIP TR 692791005AA IC201 SOFT WARE, 1.32V CF37 PDP MF056B 42PX5R-TB CHIP 2SC3875S(ALY) BK KEC Q103 0TR387500AA IC202 0IMMRHY038C HY57V561620CT-H HYNIX 54PIN,TSOP Q103 0TR387500AA CHIP 2SC3875S(ALY) BK KEC...
  • Page 29 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 30 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 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 LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION SW800 6600VR1004A SKHMPW 5P J-ALPS .V .A HORIZONTAL .G L1128 6200J000013 MLB-321611-0500P-N2 R/TP 500 OHM MLB-321611-0500P-N2 R/TP 500 OHM L1129 6200J000013 FILTER & CRYSTAL L1130 6200J000013 MLB-321611-0500P-N2 R/TP 500 OHM 6200J000013 MLB-321611-0500P-N2 R/TP 500 OHM 6200JB8010L...
  • Page 34 LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION JACK JK100 6612J00043C UPJ-R1-031 UGCOM S/T UPJ-R1-031 UGCOM S/T JK101 6612J00043C JK101 6613V00026A UJB-03-28A UGCOM 6613V00004S JK102 6612J00043C UPJ-R1-031 UGCOM S/T JK103 6612J10012A UJB-05-02C UGCOM COMPONENT JK104 6612J00038B UJB-03-25B UGCOM 6612J00038A+RED JK1200 6612B00015B DC1R019WDH JAE 0.5MM,19PIN+2PIN...
  • Page 38 PRINTED CIRCUIT BOARD MAIN (TOP) MAIN (BOTTOM) EPF (TOP) EPF (BOTTOM) SIDE A/V (TOP) LED (TOP) CONTROL (TOP) LED (BOTTOM) CONTROL (BOTTOM) SIDE A/V (BOTTOM)
  • Page 39 Jun., 2005 P/NO : 3828VD0197L Printed in Korea...

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