Question about Mitsubishi WT-46805 46" Rear Projection Television
Mitsubishi big screen you turn on and the power light comes on and then goes off,so it wont power up
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CHECK CONNECTOR "DR" FOR PROPER CONNECTION, BETWEEN THE DEFL MINI PCB AND THE MAIN PCB. 2. CHECK C5A09 AND C5A50 BOTH 33 UFD 50 V OFF OF IC5A01 ON PCB-DEFL MINI. 3. CHECK FOR LEAKY IC5A03 PART # 270P704010 ON PCB-DEFL MINI 4. SUSPECT THE HIGH VOLTAGE BLOCK PART # 920P016010.
NO POWER. RELAY CLICKS 1. CHECK Q501 (261P071010), Q502 (260P561020) AND Q503 (260P788010). IF ANY OF THESE TRANSISTORS ARE SHORTED OR LEAKY REPLACE IT INSURE THE FOLLOWING CIRCUIT CHANGE HAS BEEN DONE. REMOVE J58 FROM THE PCB-MAIN. USING AN INSULATED JUMPER WIRE, SOLDER A 22 OHM 1/4W RESISTOR BETWEEN PIN 4 OF THE RELAY K9A30 AND THE J58 HOLE NEXT TO PIN 1 OF CONNECTOR DQ. DRESS AND INSULATE THE JUMPER AND RESISTOR TO PROTECT AGAINST SHORT CIRCUITS. INSTALL A .01 UF 50V CERAMIC CAPACITOR BETWEEN THE COLLECTOR OF Q510 AND THE GROUND LEAD OF R502. NO POWER. NO RELAY CLICK 1. CHECK FOR 5 VDC AT PIN 9 OF IC700 (AC-OFF) IF MISSING CHECK PC901 PART # 268P058020, ON THE POWER PCB. Good Luck, big IRISH.
Posted on Jul 25, 2008
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Posted on Jan 02, 2017
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