LG RT-42PX10/11/H, Service Manual

Page 1: ...TV SERVICE MANUAL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS RF 043B MODEL RT 42PX12X XH 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 14 TROUBLE SHOOTING GUIDE 19 BLOCK DIAGRAM 30 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: ...53 674 49 725 48 363 56 476 60 023 68 677 47 700 59 625 47 700 59 625 54 348 63 995 67 500 77 487 68 681 47 693 60 091 68 504 60 023 63 981 RGB DVI mode RT 42PX10 11 12X 20 series RT 50PX10 20 series Resolution 640x350 720x400 640x480 848x480 800x600 Horizontal Frequency KHz Vertical Frequency Hz 852x480 832x624 1024x768 1360x768 1366x768 1152x864 1152x870 1280x960 1280x1024 70 09 85 08 70 08 85 0...

Page 12: ...ting bracket 40 42 50 40 42 50 Video cables Audio cables Ceiling mounting bracket 40 42 50 42 40 Secure the TV assembly by joinning it to a wall by using the TV Wall brackets Joinning the TV assembly to the wall to protect the set tumbling After the set must be mounted on s desk top install the TV brackets on the TV as shown Insert the 2 bolts and tighten securely in the upper holes on the bracket...

Page 13: ...X20 21 H RT 42PX20 H 48 4 1210 27 6 701 3 8 96 66 29 9 AC100 240V 50 60Hz 852 x 480 Dot 1024 x 768 Dot 16 770 000 256 steps of each R G and B 32 104 F 0 40 C Less than 80 MODEL Width inches mm Height inches mm Depth inches mm Weight pounds kg Power requirement Resolution Colour Operating Temperature Range Operating Humidity Range RT 50PX10 11 H RT 50PX20 21 H 55 1 1400 32 3 821 3 9 99 115 52 15 AC...

Page 14: ...DS 1 Install the LGIDS idsinst exe After installation is completed check if the file shown on Fig 1 has been created After using the right mouse button to click on LGIDS 2 select Create Shortcut from the menu with the left mouse button and move the shortcut icon onto the desktop 3 Double click on the LGIDS icon on the desktop to execute the program 3 2 Channel memory Method 1 Check if Malibu has b...

Page 15: ...Y Generation 1 Click on Key Generation G 2 Input the number of the key in Generation count ex If 100 Keys are required then just register 100 and next time it will automatically get 101 3 Input file When installing the program for the first time you must find the original KEY that you copied and open it It is crucial that you copy the original KEY into this directory When you use Generation the in...

Page 16: ...Diagram for Measuring Refer to Fig 11 5 3 Adjustment Method for P No 3501V00180A B D 1 Va Adjustment 1 After receiving 100 Full White Pattern HEAT RUN 2 Connect terminal of D M M to Va pin of P805 connect terminal to GND pin of P805 3 After turning RV501 voltage of D M M adjustment as same as Va voltage which on lable of panel right top Deviation 0 5V 2 Vs Adjustment 1 Connect terminal of D M M to...

Page 17: ... W for writing DDC EDID data Write Read into operation operated in DOS mode 6 4 Sequence of Adjustment 1 DDC Data Input for Analog RGB 1 Put the set on the table and turn the power on 2 Connect PC Serial to D sub 15P Cable of jig for DDC adjustment to RGB terminal D Sub 15Pin 3 Operate S W for DDC record and select DDC data for Analog RGB in Model Menu 4 Operate EDID Write command 5 Operate EDID R...

Page 18: ...ce 8 1 Required Test Equipment Pattern Equipment MSP3240A or same product 16 Gray Scale Pattern output Component output Level 0 7Vp p 8 2 Method of Auto RGB Color Balance 1 Input RGB Source Component 480p 576p 16 Gray Scale Pattern At this time except Pb and Pr signal only Y signal insert 2 Press ADJ KEY on R C for adjustment 3 Press Vol KEY and operate To set 4 Auto RGB OK means completed adjustm...

Page 19: ...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 20: ... 20 1 2 Sony Power Board Structure T502 Vs Trans T702 Va Trans T101 St by Trans T103 Low Voltage Trans 1 2 3 ...

Page 21: ... 21 1 3 Sanken Power Board Structure T221 Vs Trans T271 Va Trans T121 St by Trans T201 Low Voltage Trans 1 2 3 ...

Page 22: ...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 23: ...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 24: ...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 25: ...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 26: ...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 27: ...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 28: ...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 29: ...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 30: ...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 31: ...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 32: ... 32 EXPLODED VIEW 300 301 304 302 400 401 401 410 121 601 600 120 303 305 530 520 402 560 531 570 200 580 204 207 201 102 101 205 206 202 203 550 430 420 103 ...

Page 33: ...980V01069E SUPPORTER ASSY AL FILTER RIGHT DN 42PX12X 7T 304 4980V01070D 4980V01070E SUPPORTER ASSY AL FILTER LEFT DN 42PX12X 7T 305 3790V00281G 3790V00281G FILTER MECH RZ 42PX10 NBK 1142G03EK M6 AR NIR MESH GLASS 3 LAYER 400 3809V00444C 3809V00444D BACK COVER ASSEMBLY RZ 42PX12X XGA 3809V00444H BACK COVER ASSEMBLY RT 42PX10H S AFRICA WITH LABEL 401 3301V00025D 3301V00025G PLATE ASSEMBLY ASSY COVER...

Page 34: ...R387500AA 0TR150400BA 0TR104009AF 0TR387500AA 0TR387500AA 0TR387500AA 0TR387500AA 0TR387500AA 0TR387500AA 0TR387500AA 0TR387500AA 0TR387500AA 0TR387500AA 0TR387500AA 0TR387500AA 0TR387500AA 0TR387500AA 0TR387500AA MSP4410G QA C13 101WITH SRS HY5DU283222AQ 5 HYNIX 100P LQFP NSP 6241B NEOFIDELITY 64P TQFP MX29LV800TTC 70 MACRONIX 48PIN TSOP TAS5122DCAR 56P TSSOP NJU26901E2 JRC 8P EMP KIA7042AF SOT 8...

Page 35: ...D1206 LD1207 ZD100 ZD101 ZD102 ZD103 ZD104 ZD105 ZD400 ZD401 ZD800 C002 C1001 C1002 C1004 C1006 C1016 C1017 C1018 C102 C1020 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DD226239AA 0DD184009AA 0DD226239AA 0DD100009AM 0DD226239AA 0DD226239AA 0DD226239AA 0DL200000CA...

Page 36: ...UF MVG 16V M SMD R TP LOCA NO PART NO DESCRIPTION C1279 C1305 C1314 C1315 C1317 C1326 C1327 C1328 C1329 C1331 C1333 C1353 C1355 C1362 C1366 C1368 C1373 C1374 C1384 C1388 C1391 C1400 C1402 C1404 C1410 C1415 C1425 C208 C209 C210 C222 C223 C224 C230 C251 C254 C258 C261 C263 C272 C274 C276 C288 C289 C300 C301 C303 C315 C316 C317 C322 C324 0CE107SF6DC 0CE107SF6DC 0CE476SF6DC 0CE107SF6DC 0CE107SF6DC 0CE...

Page 37: ... 16V M SMD R TP 47UF MVG 16V M SMD R TP 47UF MVG 16V M SMD R TP LOCA NO PART NO DESCRIPTION C612 C614 C626 C627 C632 C634 C637 C651 C702 C703 C710 C713 C720 C723 C727 C737 C744 C752 C757 C762 C769 C777 C778 C785 C800 C801 C802 C803 C812 C817 C822 C825 C827 C828 C829 C834 C837 C840 C841 C847 C851 C852 C862 C863 C872 C873 C874 L1004 L1005 L1006 0CE476SF6DC 0CE476SF6DC 0CE107SF6DC 0CE107SF6DC 0CE107S...

Page 38: ...08 L1206 L1207 L1210 L1211 L1216 L1217 L1300 L1302 L1303 L1304 0RKZVTA001L 0RKZVTA001L 140 315A 140 315A 140 315A 140 315A 140 315A 140 315A 140 313B 6600VM2006A 6210VC0006A 6210VC0006A 6210VC0006A 6210VC0006A 6210VC0006A 6210VC0006A 6210VC0006A 6210VC0006A 6210VC0006A 6210VC0006A 6210VC0006A 6210VC0006A 6210VC0006A 6210VC0006A 6210VC0006A 6210VC0006A 6210VC0006A 6210VC0006A 6210VC0006A 6210VC0006...

Page 39: ...R TP 1000OHM 350MA MLB 201209 1000L N2 R TP 1000OHM 350MA MLB 201209 1000L 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 LOCA NO PART NO DESCRIPTION L303 L304 L305 L400 L400 L401 L401 L402 L403 L404 L405 L406 L407 L408 L500 L5001 L501 L502 L503 L504 L505 L506 L507 L609 L700 L8...

Page 40: ... PIP POWER CORD MP5004 13A V1625 BSI 2800MM POWER CORD V3203CA V1625 CCEE 2800MM POWER CORD M2511A 001 VDE SEMKO 2800MM POWER CORD BP3110 BIZLINK SAA 2800MM FUSE SLOW BLOW 10000MA 250 V 5 2X20 CONNECTOR CIRC D SUB 68114 1521 CONNECTOR CIRC D SUB 69107 0921 REMOTE CONTROLLER RECEIVER KSM 603SM12E 1 CABLE COAXIAL UL1365 26 150MM CABLE COAXIALUL1365 26 VW 1 TUNER TAUM W501P MINI 4 SYSTEM MAIN TUNER T...

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

Page 47: ...Nov 2004 Printed in Korea P NO 3828VD0161S ...