LG Flatron M203WA Service Manual Download Page 15 | Manualshive

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LG Flatron M203WA Service Manual Download Page 15

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TROUBLESHOOTING GUIDE

1. NO POWER

No Power

(Power Indicator Off)

Check Key Board

NO

NO

NO

Check Lips

Change Micom

Check Crack of Damage
Of Circuit Item
Around U903,U906

NO

Check U402

YES

YES

YES

YES

Check J901 Voltage

Pin #1,#2 : 15V

Pin #5,#6 : 5V

Check U903 Pin #3 : 3.3V
Check U906 Pin #3 : 1.8V

1

2

3

4

5

1

2

Waveforms

J901-#1,2(15V)

J901-#5,6(5V)

4

5

U906-#3(1.8V)

X401(14.318Mhz)

3

U903-#3(3.3V)

Check Micom ID & Version

Check X401 : 14.318Mhz

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Summary of Contents for Flatron M203WA

Page 1: ...UAL Website http biz LGservice com E mail http www LGEservice com techsup html CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS NO CL 75 MODEL M203WA M203WA BZCB A BLF Same model for Service ...

Page 2: ...z 3 Receiving Channel VHF Low 45 25 140 25MHz HIGH 147 25 423 25MHz UHF 431 25 855 25MHz 4 4 AV 1 Video Level Input 0 7 0 15Vp p 2 Sync Level Input 0 286 0 075Vp p 3 Color Burst Input 0 214 0 072Vp p 4 Audio Level AV Input 0 5 0 1Vrms PC Input 0 7 0 1Vrms 5 Video Cross Talk 43dB 5 Max Resolution WSXGA 1680 x 1050 60Hz 6 POWER SUPPLY 6 1 Power 100 240V 50 60Hz 6 2 Power Consumption 7 ENVIRONMENT 7 ...

Page 3: ...e module from the ESD as it may damage the electronic circuit C MOS Make certain that treatment person s body are grounded through wrist band Do not leave the module in high temperature and in areas of high humidity for a long time The module not be exposed to the direct sunlight Avoid contact with water as it may a short circuit within the module If the surface of panel become dirty please wipe i...

Page 4: ...t receiver ground lead to the receiver chassis ground before connecting the test receiver positive lead Always remove the test receiver ground lead last 9 Use with this receiver only the test fixtures specified in this service manual CAUTION Do not connect the test fixture ground strap to any heat sink in this receiver Electrostatically Sensitive ES Devices Some semiconductor solid state devices c...

Page 5: ...tip as the solder melts 2 Draw away the melted solder with an anti static suction type solder removal device or with solder braid before removing the IC Replacement 1 Carefully insert the replacement IC in the circuit board 2 Carefully bend each IC lead against the circuit foil pad and solder it 3 Clean the soldered areas with a small wire bristle brush It is not necessary to reapply acrylic coati...

Page 6: ...onnection 4 Route the jumper wire along the path of the out away copper pattern and let it overlap the previously scraped end of the good copper pattern Solder the overlapped area and clip off any excess jumper wire At Other Connections Use the following technique to repair the defective copper pattern at connections other than IC Pins This technique involves the installation of a jumper wire on t...

Page 7: ... 6 H Pixels 65 0 48 363 1344 1024 24 136 160 1024 x 768 V Lines 60 0 806 768 3 6 29 7 H Pixels 78 75 60 123 1312 1024 16 96 176 1024 x 768 V Lines 75 029 800 768 1 3 28 8 H Pixels 108 0 67 500 1600 1152 64 128 256 1152 x 864 V Lines 75 000 900 864 1 3 32 9 H Pixels 108 0 63 981 1688 1280 48 112 248 1280 x 1024 V Lines 60 02 1066 1024 1 3 38 10 H Pixels 135 0 79 976 1688 1280 16 144 248 1280 x 1024...

Page 8: ... 8 DISASSEMBLY Disassembly Hinge Cover Pull the speaker cover 1 Remove the screws Disassemble back cover Press down on cabinet and pull the back cover 2 3 4 5 6 Remove the screws Remove the screws 7 ...

Page 9: ... 9 BLOCK DIAGRAM ...

Page 10: ... devices Micom controls this IC through IIC Line 1 Video Decoder This Block Selects input Video signals like CVBS Y C SCART RGB and output RGB signal On decoding We can control signal like Contrast Brightness Sharpness Color tint signals including Adaptive Comb Filter 2 Audio Decoder This block analyzes audio input signal through A V Jack and PC audio and Tuner IF The analyzed signals transmitted ...

Page 11: ... bridge rectifier and a bulk capacitor 3 Energy Transfer This part function is for transfer the primary energy to secondary through a power transformer 4 Output rectifier and filter This part function is to make a pulse width modulation control and to provide the driver signal to power switch to adjust the duty cycle during different AC input and output loading condition to achieve the dc output s...

Page 12: ... is available to LCD Monitor only 1 Port Setup a Copy UserPort sys file to c WINNT system32 drivers folder b Run Userport exe c Remove all default number d Add 300 3FF e Click Start button f Click Exit button 2 EDID Read Write 1 Run WinEDID exe 2 Edit Week of Manufacture Year of Manufacture Serial Number a Input User Info Data b Click Update button c Click Write button ...

Page 13: ...EU East Europe Polish France Scandinavian Czech Slovak German Slovenian Croatian Italian Rumanian Recommended data TURKEY W EU Recommended data English France Scandinavian Turkish German Spain Portuguese Italian Greek English Czech Hungary German Polish Serbia Turkish Rumanian CYRILLIC 1 Polish Russian Estonian Lettish Estonian CYRILLIC 2 Polish Russian Scandinavian Czech Estonian Lettish CYRILLIC...

Page 14: ...witch Power Select Switch 110V 220V Control Line N o t u s e d R S 2 3 2 C P A R A L L E L V S Y N C P O W E R S T VGS MONITOR E E V Sync On Off Switch Switch must be ON F F A A B B C C 15 10 5 5 6 9 1 1 1 14 13 25 6 5V 5V 5V 4 7K 4 7K 4 7K 74LS06 74LS06 OFF ON OFF ON 11 S Video Video Signal Generator ...

Page 15: ...com Check Crack of Damage Of Circuit Item Around U903 U906 NO Check U402 YES YES YES YES Check J901 Voltage Pin 1 2 15V Pin 5 6 5V Check U903 Pin 3 3 3V Check U906 Pin 3 1 8V 1 2 3 4 5 1 2 Waveforms J901 1 2 15V J901 5 6 5V 4 5 U906 3 1 8V X401 14 318Mhz 3 U903 3 3 3V Check Micom ID Version Check X401 14 318Mhz ...

Page 16: ...AYED No Raster OSD Is Not Displayed Change J401 NO NO NO Change Pannel Link Cable Change Micom YES YES YES YES Check Pannel Link Cable Check J401 Crack Check Micom ID Version Check U918 Pin 2 2 5V Check U402 6 Waveforms U918 2 2 5V 6 ...

Page 17: ... Video Board Ass y YES YES YES YES YES YES Check Cable of J106 Check Video Board Check U908 Pin 1 3 5V 3 3V Check U909 Pin 3 1 8V In Case of AV1 Scart In Case of TV Change Video Board Ass y Check Peripheral Circuit Check Tuner TU802 Check Connection of EXT 7 8 9 Waveforms 7 8 9 U908 1 5V U908 3 3 3V U909 3 1 8V ...

Page 18: ...d Reader No Raster On Card Reader NO NO NO Chang FFC Cable Repair U502 Soldering Repair the Point YES YES Check FFC Cable of J104 Check U502 Check Signal of R527 C531 C528 in Card Reader Board 10 10 Waveforms R527 C531 C528 ...

Page 19: ...Raster AV1 AV2 Mode 1 Check C605 C606 2 If No Signal on C605 or C606 Change Video Board Card Reader 1 Check U703 Peripheral Circuit 2 Check FFC Cable Check the Peripheral IC Of U201 Change the Cable Check a Signal of C153 156 Change the Cable YES YES YES YES Check the Cable of Key to Speaker Check Input Signal Waveform Check input Signal waveform Check the Cable of Main to Key ...

Page 20: ... 20 30P 11P 12P 12P 6631T20034P 6631T12006R 6631T11012W 6631T20036E EAB31789901 WIRING DIAGRAM ...

Page 21: ...EXPLODED VIEW 21 010 020 090 100 110 120 170 030 130 160 040 150 140 060 050 070 080 ...

Page 22: ...NECTOR KOREA TOPTONE 6871TVT380A PCB Assembly Video SUB T T VIDEO BOARD M203WTB BRAND 6871TST749B PCB Assembly Sub CONTROL T T CARD READER MODEL M203WX BRAND 4951TKS178B Plate Assembly FRAME A CDK 3313TL2031D Main Total Assembly M203WA BZCB F2 BRAND CL 75 3313TL2031B Main Total Assembly M203WA BZCB BRAND CL 75 6871TPT280G PCB Assembly Power POWER T T LIPS FOR LPL 20 1 M203WTB CARD READER LIEN CHAN...

Page 23: ...DESCRIPTION SPECIFICATION C220 0CK105CF94A 0603F105Z160CT 1uF 20TO 80 C221 0CK105DH56A C2012X7R105KFT 1uF 10 25V X C222 0CK105CF94A 0603F105Z160CT 1uF 20TO 80 C223 0CK105CF94A 0603F105Z160CT 1uF 20TO 80 C224 0CK105CF94A 0603F105Z160CT 1uF 20TO 80 C225 0CK105DH56A C2012X7R105KFT 1uF 10 25V X C226 0CH8476H691 MVK8 0TP25VC47M 47uF 20 25V C227 0CH8476H691 MVK8 0TP25VC47M 47uF 20 25V C228 0CH3474H946 C...

Page 24: ...0uF 20 16V 12 C654 0CH3104K566 0805B104K500CT 100nF 10 50V C655 0CH3104K566 0805B104K500CT 100nF 10 50V DATE 2006 09 21 S AL LOC NO PART NO DESCRIPTION SPECIFICATION C656 0CH3104K566 0805B104K500CT 100nF 10 50V C657 0CH3104K566 0805B104K500CT 100nF 10 50V C658 0CH3104K566 0805B104K500CT 100nF 10 50V C659 0CH3104K566 0805B104K500CT 100nF 10 50V C660 0CH6220K416 C2012C0G1H220JT 22pF 5 50V C661 0CH62...

Page 25: ...T 10nF 10 50V C970 0CE107EF610 KMG16VB100M 100uF 20 16V 12 C971 0CK104CK56A 0603B104K500CT 100nF 10 50V C972 0CK102CK56A 0603B102K500CT 1nF 10 50V X C973 0CK103CK51A 0603B103K500CT 10nF 10 50V DATE 2006 09 21 S AL LOC NO PART NO DESCRIPTION SPECIFICATION C974 0CE107EF610 KMG16VB100M 100uF 20 16V 12 C975 0CK104CK56A 0603B104K500CT 100nF 10 50V D101 0DS226009AA KDS226 1 2V 85V 300MA 2A 4NS D102 0DS2...

Page 26: ...2D HB 4M3216 301JT 300OHM 3 2X1 RA804 6210TCE002D HB 4M3216 301JT 300OHM 3 2X1 RA805 6210TCE002D HB 4M3216 301JT 300OHM 3 2X1 U801 6200QL3002F X6966M 36 125MHZ 17 3X3 9X8 DATE 2006 09 21 S AL LOC NO PART NO DESCRIPTION SPECIFICATION L106 6140TBZ007E SLF12575T 330M3R2 33UH 20 L107 6140TBZ007E SLF12575T 330M3R2 33UH 20 L108 6140TBZ007E SLF12575T 330M3R2 33UH 20 L109 6140TBZ007E SLF12575T 330M3R2 33U...

Page 27: ...5 1 8W 2 R413 0RH0222D622 MCR10EZHJ220 22OHM 5 1 8W 2 R414 0RJ0000D677 MCR03EZPJ000 0OHM 5 1 10W 1 DATE 2006 09 21 S AL LOC NO PART NO DESCRIPTION SPECIFICATION R415 0RH0000D622 MCR10EZHJ000 0OHM 5 1 8W 20 R418 0RH0000D622 MCR10EZHJ000 0OHM 5 1 8W 20 R419 0RH0000D622 MCR10EZHJ000 0OHM 5 1 8W 20 R420 0RH4701D622 MCR10EZHJ472 4 7KOHM 5 1 8W R422 0RJ0000D677 MCR03EZPJ000 0OHM 5 1 10W 1 R423 0RJ1002D6...

Page 28: ...1 8W R676 0RJ1000D677 MCR03EZPJ101 100OHM 5 1 10W R678 0RH1500D622 MCR10EZHJ151 150OHM 5 1 8W DATE 2006 09 21 S AL LOC NO PART NO DESCRIPTION SPECIFICATION R680 0RJ1000D677 MCR03EZPJ101 100OHM 5 1 10W R681 0RJ1000D677 MCR03EZPJ101 100OHM 5 1 10W R682 0RJ1000D677 MCR03EZPJ101 100OHM 5 1 10W R683 0RJ1000D677 MCR03EZPJ101 100OHM 5 1 10W R689 0RH2202D622 MCR10EZHJ223 22KOHM 5 1 8W R691 0RH0000D622 MCR...

Page 29: ...L MOSF U918 0TFVI80067A SI3865BDV E3 N CHANNEL MOSF U919 0TFVI80067A SI3865BDV E3 N CHANNEL MOSF U920 0TFVI80067A SI3865BDV E3 N CHANNEL MOSF DATE 2006 09 21 S AL LOC NO PART NO DESCRIPTION SPECIFICATION X401 6202TST001A SX 1 14 31818MHZ 30PPM 14 31 X601 6202TST003C HC 49 SM5H 20 25MHZ 50PPM 20 SW501 140 058E THVV502GBC 1C1P 12VDC 0 05A SW502 140 058E THVV502GBC 1C1P 12VDC 0 05A SW503 140 058E THV...

Page 30: ... 30 SCHEMATIC DIAGRAM 1 CONNECTOR JACK ...

Page 31: ... 31 2 MEMORY AUDIO AMP ...

Page 32: ... 32 3 SCALER GM1601 5 X401 14 318Mhz 5 ...

Page 33: ... 33 4 VUDEO DEC VCT49XYI ...

Page 34: ... 34 5 MST9883C TUNER SCARTJACK ...

Page 35: ... 35 6 POWER 3 6 4 7 3 U903 3 3 3V 4 U906 3 1 8V 6 U918 2 2 5V 7 U908 1 5V ...

Page 36: ... 36 6 POWER 2 1 J901 1 2 15V J901 5 6 5V 8 9 U908 3 3 3V U909 3 1 8V 2 1 8 9 ...

Page 37: ...Sep 2006 P NO 38289S0041 Printed in Korea ...

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