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LG 42PX5R Service Manual

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

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Summary of Contents for LG 42PX5R

  • 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 MULTIMEDIA Selects the Component, RGB or HDMI INPUT MODE POWER...
  • 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 Remote Control handset Owner’s Manual 2-Eye Bolts 1.5V Power Cord Alkaline batteries 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

    1) Performance : LGE TV test method followed. 2) Demanded other specification Safety: CE, IEC specification EMC : CE, IEC Model Name Market Remark 42PX5R-ZB Safety : IEC/EN60065, EMI : EN55013, EMS : EN55020 General Specification 1. Module Specification Item Specification Remark...
  • Page 9 2. Model Specification Item Specification Remark Market 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 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 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. Ø Non does not come in into the front LED. Ø (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 Ø from module The Rely falls(The sound is audible “click”) Ø It is converted with the color where the front LED Ø 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. Ø It maintains the condition where the front LED is green. Ø (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 Ø The minute discharged continuously becomes Ø 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 Ø (RF, AV, Component, RGB, DVI). (2) Check following Check the all input mode should become normality display. Ø...
  • Page 23 6. In case of no sound (1) Symptom LED is green Ø Screen display but sound is not output Ø (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 Ø Don’t enter EPF mode Ø Screen display but sound is not output Ø (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

    PLATE ASSEMBLY, AV 3301V00053 3301V00054 42PX4RV-TA ASSY 68719MMW35 68719MMW15A PWB(PCB) ASSEMBLY,MAIN M.I MF056B 42PX5R-ZB X3 6871VSMS63A 6871VSMS63A PWB(PCB) ASSEMBLY,SUB CONT T.T MF056B 42PX5R-TB HURRICANE 2 5020V01022B 5020V01022B BUTTON, CONTROL DU-42PX51X ABS, AF-303S 8KEY TITAN GRAY 3141VSNF52A 31419SF046A CHASSIS ASSEMBLY, SUB MF056B 42PX5R-TB EPF...

  • Page 28: Replacement Parts List

    REPLACEMENT PARTS LIST LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION IC105 0TR830009BA BSS83 TP PHILIPS N-CHANNEL S/W TR IC1202 0TR830009BA BSS83 TP PHILIPS N-CHANNEL S/W TR 0IPRPML001A IC1000 MIC39100 3P SOT223 R/TP LDO TYPE 2.5V IC1203 0TR830009BA BSS83 TP PHILIPS N-CHANNEL S/W TR IC1001 0IMCRRH001A...
  • 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 SW105 140-315A SKHV17910B 12V 0.05A HORIZONTAL 160G L1122 6200J000013 MLB-321611-0500P-N2 R/TP 500 OHM SKHV17910B 12V 0.05A HORIZONTAL 160G MLB-321611-0500P-N2 R/TP 500 OHM SW106 140-315A L1123 6200J000013 140-315A SKHV17910B 12V 0.05A HORIZONTAL 160G 6200J000013 MLB-321611-0500P-N2 R/TP 500 OHM SW107...
  • Page 34 LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION X300 166-E02F RESONATOR,CERAMIC CSBLA500KECZF09-B0 X400 156-A02M RESONATOR,CRYSTAL HC49U 18.432MHZ 6212AB2844A RESONATOR,CRYSTAL ABLS-19.6608MHZ X700 X800 6212AB2844A RESONATOR,CRYSTAL ABLS-19.6608MHZ JACK JK100 6612J00043C UPJ-R1-031 UGCOM S/T,SCART,SHIELD,SPRING JK101 6613V00026A UJB-03-28A 6613V00004S+SHIEL+SCREW JK101 6612J00043C UPJ-R1-031 UGCOM S/T,SCART,SHIELD,SPRING JK102 6612J00043C UPJ-R1-031 UGCOM S/T,SCART,SHIELD,SPRING...
  • Page 38 PRINTED CIRCUIT BOARD MAIN (TOP) MAIN (BOTTOM) EPF (TOP) EPF (BOTTOM) CONTROL (TOP) CONTROL (BOTTOM) LED (TOP) LED (BOTTOM) SIDE A/V...
  • Page 39 Jan., 2006 P/NO : 38289S0052C Printed in Korea...

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