LG RT-42PX10, Service Manual

Page 1: ... TV SERVICE MANUAL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS RF 043B MODEL RT 42PX10 H website http biz LGservice com e mail http www LGEservice com techsup html ...

Page 2: ...NS 3 DESCRIPTION OF CONTROLS 4 SPECIFICATIONS 13 ADJUSTMENT INSTRUCTIONS 15 TROUBLE SHOOTING GUIDE 18 BLOCK DIAGRAM 29 EXPLODED VIEW 32 EXPLODED VIEW PARTS LIST 33 REPLACEMENT PARTS LIST 34 SCHEMATIC DIAGRAM PRINTED CIRCUIT BOARD ...

Page 3: ... With the instrument AC plug removed from AC source connect an electrical jumper across the two AC plug prongs Place the AC switch in the on position connect one lead of ohm meter to the AC plug prongs tied together and touch other ohm meter lead in turn to each exposed metallic parts such as antenna terminals phone jacks etc If the exposed metallic part has a return path to the chassis the measur...

Page 4: ...ays on screen menus one by one Exits the current menu Memorizes menu changes SWAP Returns to the previously viewed programme Note This function works only when Favorite programme is set to Off Otherwise each press of this button will select a stored favorite pro gramme SSM To select the sound appropriate to your viewing programme character NUMBER buttons SLEEP Sets the sleep timer I II Selects the...

Page 5: ...ts the TV AV Component RGB or DVI modes If OSD is dis played selects menu item MENU Displays on screen menus one by one Exits the current menu Memorizes menu changes D D E E Programme Up Down selects a programme or a menu item switches the set on from standby F F G G Volume Up Down adjusts the volume adjusts menu settings Power Standby Indicator Illuminates red in standby mode Illuminates green wh...

Page 6: ...o this socket 4 COMPONENT INPUT Connect DVD video outputs to Y PB PR of COMPONENT INPUT and audio outputs to Audio sockets of AUDIO INPUT 5 AUDIO VIDEO IN SOCKETS AV1 Connect the audio video out sockets of external equipment to these sockets S VIDEO AUDIO IN SOCKETS Connect the S VIDEO out socket of an VCR to the S VIDEO socket Connect the audio out sockets of the VCR to the audio sock ets as in A...

Page 7: ...n for a long period of time Typically a frozen still pic ture from a VCR Refer to p 25 If a 4 3 picture format is used the fixed image may remain visible on the screen To avoid picture noise interference leave an adequate distance between the VCR and set Watching TV programmes Turn the set on and select the programme you want Watching VCR 1 Use the TV AV button on the remote control to select AV1 ...

Page 8: ... input jacks on the set with the output jacks on the audio video equipment Video yellow Audio Left white Audio Right red How to use 1 Use the TV AV button on the remote control to select AV1 or AV2 2 Operate the corresponding external equipment See external equipment operating guide S VIDEO AUDIO VIDEO MONITOR OUTPUT A V INPUT1 AUDIO R L An VIDEO INPUT 2 COMPONENT INPUT 1 COMPONENT AUDIO INPUT RGB...

Page 9: ... INPUT R L MOND R R R R Back panel of the set DVD player Watching DTV option To watch digitally broadcast programs purchase and connect a digital set top box How to connect 1 Use the monitor s COMPONENT Y PB PR INPUT RGB or DVI jack for video connections depending on your set top box con nector Then make the corresponding audio connections How to use 1 Turn on the digital set top box Refer to the ...

Page 10: ...the signal cable from the DVI out put port of the PC to the DVI INPUT port on the set Connect the audio cable from the PC to the Audio input on the set Audio cables are not included with the set If using a sound card adjust PC sound as required This set apply a VESA Plug and Play Solution The set provides EDID data to the PC system with a DDC protocol The PC adjusts automatically to use this set D...

Page 11: ...69 37 927 31 469 35 000 37 861 37 500 43 269 31 500 37 799 39 375 31 500 37 799 39 375 35 156 37 879 48 077 46 875 53 674 49 725 48 363 56 476 60 023 68 677 54 348 63 995 67 500 77 487 68 681 60 023 63 981 70 09 85 08 70 08 85 03 59 94 66 66 72 80 75 00 85 00 60 00 70 00 75 00 60 00 70 00 75 00 56 25 60 31 72 18 75 00 85 06 74 55 60 00 70 06 75 02 85 00 60 05 70 01 75 00 85 00 75 06 60 02 60 02 ...

Page 12: ...ras Tilt wall mounting bracket 40 42 50 40 42 50 Video cables Audio cables Ceiling mounting bracket 40 42 50 42 40 Secure the TV assembly by attaching it to a wall for additional support Attaching the TV assembly to the wall Install the TV brackets on the TV as shown Insert the 2 bolts and tighten securely in the upper holes on the bracket Install the wall brackets on the wall with 4 bolts not sup...

Page 13: ...Test and Inspection Method 1 Performance LGE TV test method followed 2 Demanded other specification Safety CE IEC specification EMC CE IEC V General Specification 1 General Specification Appliance TEST TEST Remark Safety IEC EN60095 EMI EN55013 EMS EN55020 Safety IEC60065 EMI CISPR13 Model Name RT 42PX10 RZ 42PX10 Market EU Non EU Chassis RF 043B Brand LG LG Model Name RZ 42PX10 RT 42PX10 Market P...

Page 14: ...L B G I D K SECAM L NTSC4 43 PAL60 DVI D L R Input 14 No 8 9 10 11 12 13 14 15 16 17 18 Remark 4 System PAL B G I D K SECAM L NTSC4 43 PAL60 4 System PAL B G I D K SECAM L NTSC4 43 PAL60 4 System PAL B G I D K SECAM L NTSC4 43 PAL60 DVI D L R Input Specification Non EU PAL B G I D K NTSC Upper Heterodyne PAL SECAM NTSC PAL SECAM NTSC PAL SECAM NTSC Y Cb Cr Y Pb Pr RGB PC RGB DTV for Austrailian DV...

Page 15: ... exe 2 After installing the Gprobe Option Connection Setup or click the icon indicated in the picture and then setup as below the picture In case of the port second one set to the serial port of the connected PC The other only have to be set as below the picture 3 After finishing inputs click the button OK to complete the connection setup 2 Confirming the G prove 1 Connect Rs232 cable and then tur...

Page 16: ...e as Va voltage which on label of panel right top Deviation 0 5V 2 Adjustment method ofr P No 3501V00182A B D 1 Va Adjustment a After receiving 100 Full White Pattern HEAT RUN b Connect terminal of D M M to Va pin of P805 connect terminal to GND pin of P805 c After turning RV 601 voltage of D M M adjustment as same as Va voltage which on lable of panel right top Deviation 0 5V 2 Vs Adjustment a Co...

Page 17: ... DDC Data Input 1 Required Test Equipment 1 A jig for adjusting PC DDC PC serial to D sub Connection equipment 2 S W for writing DDC EDID Data Write Read 3 D sub 15P Cable D Sub to DVI Connector Connect to DVI Jack 2 Setting of Device 3 Preparation for Adjustment 1 Set devices as above and turn the PC jig on 2 Put S W for writing DDC EDID data Write Read into operation operated in DOS mode 4 Seque...

Page 18: ...signal Doesn t the high tension output come out Doesn t the VSC signal Vs ON come out Yes Yes High tension output voltage Drop it occurs When remove the Y B D Module Input Connector output voltage Drop it occurs When remove the Y Z B D Module Input Connector Power Board high tension output voltage Drop it occurs Yes No No 9 Check the Power Board Output high tension circuit Yes 10 Check the Z B D M...

Page 19: ... 19 1 2 Sony Power Board Structure T502 Vs Trans T702 Va Trans T101 St by Trans T103 Low Voltage Trans 1 2 3 ...

Page 20: ... 20 1 3 Sanken Power Board Structure T221 Vs Trans T271 Va Trans T121 St by Trans T201 Low Voltage Trans 1 2 3 ...

Page 21: ...ect the Power Switch and Power Board Cable Connect Cable Yes No Is normal the Fuse F101 on Power Board Replace Fuse Yes No Is connect the Power Board and 7P of VSC Board Cable Connect Cable Yes No Is connect the Power Switch and Power Board Cable After remove the cable connect to Power Board except the CN101 connection cable authorizes the AC voltage marking on manual When ST BY 5V does not operat...

Page 22: ...nnector of Y B D Is normal the Fuse F52 on Y B D In case of open is replace Yes No Yes Yes Replace Z Board Is normal the Z Board Is normal the output voltage after remove P1 connector of Z B D Is normal the Fuse FS1 FS2 on Z B D In case of open is replace Yes No Yes Is normal the X Board Is normal the output voltage after remove P1 2 3 4 6 7 connector of X B D After remove P1 P2 P3 P4 output volta...

Page 23: ...Y B D In case of open is replace Yes No Yes Yes Replace Z Board Is normal the Z Board Is normal the output voltage after remove P1 connector of Z B D Is normal the Fuse FS1 FS2 on Z B D In case of open is replace Yes No Yes Is normal the X Board Is normal the output voltage after remove P1 2 3 4 6 7 connector of X B D After remove P1 P2 P3 P4 output voltage normality Replace Right X B D After remo...

Page 24: ...m module 2 Check follow Is normal the LVDS cable Is normal the VSC Digital Board Is the LVDS cable connected well Cable inserts well Yes No No Yes Operates the Thine IC IC1100 Replace Thine IC IC1100 No Is normal the Ctrl Board of Module Replace Ctrl B D No No Operates the IEP IC500 Replace IEP IC500 Yes No Operates the Scaler IC700 Replace Scaler IC700 Yes Replace cable Yes ...

Page 25: ...n the case of becomes unusual display from RF AV mode Is normal the Tuner Is normal the CXA2069Q Is the Tuner Cable connected well Cable inserts well Yes No No Yes Is normal the VPC3230 Replace Tuner No Is normal the Input voltage IIC Communication and CVBS output Yes Is normal the Input voltage IIC Communication and HV sync No Replace IC No Is normal the Input voltage IIC Communication and HV syn...

Page 26: ...ync No Replace IC No Yes Is normal the Scaler Is normal the Input voltage IIC Communication and HV sync No Replace IC No Is normal the 74LS123 Yes Is normal the CXA2101 Is normal the Input voltage IIC Communication and HV sync No Replace IC No Is normal the Input voltage IIC Communication and HV sync No Replace IC No Yes Is normal the M52758 Is normal the Input voltage IIC Communication and HV syn...

Page 27: ...No Replace IC No Is normal the Input voltage IIC Communication and HV sync No Replace IC No Is normal the M52758 Yes Is normal the Scaler Is normal the Input voltage IIC Communication and HV sync No Replace IC No Is normal the Scaler Is normal the Input voltage IIC Communication and HV sync No Replace IC No Is normal the Input voltage IIC Communication and HV sync No Replace IC No Yes Is normal th...

Page 28: ...ble connected well Cable inserts well No No Cable inserts well No Replace IC800 No Replace IC801 No Replace SPK cable Yes Yes Is normal the RGB DVI sound Is the Flat cable connected well No No Operates the IC800 Yes Operates the IC801 Replace IC802 No Operates the IC802 Replace VSC Analog B D Yes Yes Yes Is normal the RF AV Component sound ...

Page 29: ...Cb Cr 8 HY57V64322 SDRAM 8MB RGB PC DTV RGB PC RGB DTV g m 1601 Sc aler Malib u Comp DTV CXA_RGB RGB_Dat a Main_Vid eo 24 Sub _Vid eo 8 DVI_Dat a TX_Out RS232_RX TX Co mp RGB_SW Fro m Malib u Dig it al Analo g Sid e AV CVBS S VHS Vin5 YCin5 Co mp _Y Co mp _480I P To Malib u Vid eo f o r Text Text TX0 1 2 3 C Disp _En SDATA SCLK SLE HY5DU283222A SDRAM 128MB AM29LV F ROM 1MB Co mp RGB_SW Co mp _480I...

Page 30: ...FP I2C Exp end er M62320FP I2C Exp end er CXA2069Q UPD64083 UPD64083 VPC3230 MAIN VPC3230 MAIN VPC3230 SUB VPC3230 SUB DVD_SUB DTV_Co mp M52758FP IC400 MUX M52758FP IC400 MUX DVD_MAIN DVD2_MAIN DVD2_SUB DTV2_Co mp S VHS Tuner M Tuner S VIN1 Y CIN1 Co mp Co mp 2 MNT_OUT VIN2 Y CIN2 MAIN_VOUT SUB_COUT SUB_YOUT CAB_VIN MAIN_YOUT MAIN_COUT LA7151M SW CVBS Y COMB_YOUT COMB_COUT ALT_Y_480I_MAIN ALT_Y_48...

Page 31: ...MEMO 31 ...

Page 32: ... 32 EXPLODED VIEW 300 301 304 302 202 206 203 204 201 205 580 400 401 410 402 520 560 530 531 570 121 601 600 120 490 207 200 303 305 ...

Page 33: ...OM RZ 42PX10 303 4980V01069A SUPPORTER ASSY AL FILTER RIGHT RZ 42PX10 304 4980V01070A SUPPORTER ASSY AL FILTER LEFT RZ 42PX10 305 3790V00281F FILTER MECH GLASS FILTER MN42PZ44 1142G03EK 42KK NBK ETCHING MESH 400 3809V00444A BACK COVER ASSEMBLY RZ 42PY20 NON 401 3301V00025D PLATE ASSEMBLY ASSY COVER VSC TUNER RU 42PX10 PRESS 402 3301V00023D PLATE ASSEMBLY ASSY AV VSC TUNER RU 42PX10 410 4980V01071A...

Page 34: ...500AA 0TR387500AA 0TR387500AA 0TR150400BA 0TR387500AA 0TR104009AF 0TR387500AA 0TR150400BA 0TR104009AF 0TR387500AA 0TR387500AA 0TR387500AA 0TR387500AA 0TR387500AA 0TR387500AA 0TR387500AA 0TR387500AA 0TR387500AA 0TR387500AA 0TR387500AA 0TR387500AA 0TR387500AA 0TR387500AA 0TR387500AA 0TR387500AA 0TR387500AA 0TR387500AA 0TR387500AA 0TR387500AA 0TR387500AA 0TR387500AA CHIP 2SC3875S ALY KEC CHIP 2SC3875...

Page 35: ... LD1003 LD1203 LD1204 LD1206 LD1207 C002 C1001 C1002 C1003 C1004 C1006 C1016 C1017 C1018 C102 C1020 C1022 C1025 C1027 C1031 C1037 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DR050008AA 0DR050008AA 0DR050008AA 0DR050008AA 0DR050008AA 0DR050008AA 0DR050...

Page 36: ...UF MVG 16V M SMD R TP LOCA NO PART NO DESCRIPTION C1274 C1275 C1279 C1305 C1314 C1315 C1317 C1331 C1333 C1353 C1355 C1362 C1366 C1368 C1373 C1374 C1384 C1388 C1391 C1400 C1402 C1404 C1410 C1415 C1425 C208 C209 C210 C222 C222 C223 C223 C224 C224 C230 C251 C258 C261 C263 C272 C274 C276 C288 C300 C301 C303 C315 C316 C317 C322 C324 C334 0CE107SF6DC 0CE107SF6DC 0CE107SF6DC 0CE107SF6DC 0CE476SF6DC 0CE10...

Page 37: ... 22UF MVG 16V 20 SMD R TP LOCA NO PART NO DESCRIPTION C777 C778 C785 C800 C801 C802 C803 C812 C817 C822 C825 C827 C828 C829 C834 C834 C837 C840 C841 C847 C851 C852 C862 C863 C872 C873 C874 R112 R113 L1004 L1005 L1006 L1007 L1200 L1203 L1209 L1213 L803 L804 L805 L806 AR1101 AR1102 AR1103 AR1104 AR1105 AR1106 AR500 0CE226SF6DC 0CE226SF6DC 0CE335SK6DC 0CE226SF6DC 0CE226SF6DC 0CE476SF6DC 0CE226VF6DC 0...

Page 38: ...22 OHM 1 16 W 1608 5 R TP 4P E24 22 OHM 1 16 W 1608 5 R TP 4P E24 LOCA NO PART NO DESCRIPTION R801 R802 SW001 SW002 SW003 SW004 SW005 SW006 SW700 SW800 SW800 L100 L100 L1000 L1001 L1002 L1008 L1009 L101 L101 L1010 L1011 L1012 L1013 L1014 L1015 L1016 L1017 L1018 L1019 L102 L102 L103 L103 L104 L105 L105 L106 L107 L108 L1206 L1207 L1210 L1211 L1216 L1217 L1300 L1302 0RKZVTA001L 0RKZVTA001L 140 315A 1...

Page 39: ...L N2 R TP 1000OHM 350MA MLB 201209 1000L N2 R TP 1000OHM 350MA FBMH3216 HM501NT 3 2X1 6X1 6MM R TP FBMH3216 HM501NT 3 2X1 6X1 6MM R TP FBMH3216 HM501NT 3 2X1 6X1 6MM R TP FBMH3216 HM501NT 3 2X1 6X1 6MM R TP FBMH3216 HM501NT 3 2X1 6X1 6MM R TP LOCA NO PART NO DESCRIPTION L305 L400 L400 L401 L401 L402 L403 L404 L405 L406 L407 L500 L501 L502 L503 L504 L505 L506 L507 L609 L700 L800 L807 L808 R102 R103...

Page 40: ...004B 6712000002A 6700MF0010A 6700MF0010B FUSE SLOW BLOW10000MA 250 V 5 2X20 HOLDER FUSE NON MC994C PAPING HOLDER FUSE NON MC994C PAPING CONNECTOR CIRC D SUB 68114 1521 CONNECTOR CIRC D SUB 69107 0921 REMOTE CONTROLLER RECEIVER TUNE RTAUM W501P 4 SYSTEM MAIN TUNE RTAFM W502P 4SYSTEM SUB LOCA NO PART NO DESCRIPTION MISCELLANEOUS ...

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Page 45: ...MAIN TOP ...

Page 46: ...PRINTED CIRCUIT BOARD MAIN TOP POWER S W TOP POWER S W BOTTOM MAIN BOTTOM TUNER TOP TUNER BOTTOM SIDE A V TOP SIDE A V BOTTOM CONTROL TOP CONTROL BOTTOM ...

Page 47: ...April 2004 Printed in Korea P NO 3828VD0161H ...