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Chassis

Part Symbol Defective Circuit

Symptom

solution

MMC102 G P13400 MMC102 G C13109 MMC101 CE C13110

Intermittently will not start. KD3 line to micro was low. Disconnect the front panel and Reinstall the short goes away. Found the FPA wiring harness pinched in the mask. Reinstalled wiring harness in System Control the wiring harness in its correct location and it has never had a startup problem since. its correct location System Control Dead, U13101 pin 50, 0 VDC, removed C13109 and VDC came back up to 5 volts replace C13109 Dead Set, No horizontal drive out of the deflection controller CBA. We found the control line to U13101-49 was measuring 39K to ground, should be 200k. Replaced System Control C13110 restored normal operation Replace C13110 with contrast set at normal, picture is too bright, with contrast set at middle, brightness would drop down, with contast set all the way down, picture too bright. reinit eeprom and it came back to normal operation No video or osd in 1h ,it works ok in 2h. Video in 1h did get to pin53 of U22300 , but no rgb out. Replaced eeprom U13102 and it came back. Unit would come on with sound and picture for about 3-4 sec then shutdown and cycle 3 times. Tech did not check error codes. Found one fan not running working fan worked in both plugs. Unit would intermittently shutdown. No error codes. Replaced micro Dead, the power LED would not light. Found the volume + switch (sw13421) on the FPA shorted. the high voltage will come up and shut back down. R13174 in the horizontal sync line to the microprocessor cracked Won't start. Checking pin 44 of U13101 the data line there was no voltage. Found one side of R13141 on the data line cracked. dead set, disconnecting IR13401 and the set runs Shuts down and then back on. Unplugging the gemstar alllowed the set to run normally

MMC101 CC alignment mmc101 U13102

System Control System Control

reinit eeprom Replace U13102.

mm101 DTV307 DTV306G C DTV306C B

fan U13101 SW13421 R13174

System Control System Control System Control System Control System Control System Control System Control

Replace fan Replace U13101 Replace the volume + switch. replace R13174 Resolder R13141 replace IR13401 Replace gemstar

CTC211A R13141 CTC211A IR13401 Guide CTC211A Module