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Mitsubishi WD720U overheating after new lamp

Posted: Thu Jan 21, 2016 11:06 pm
by aAandy
Hello everyone

new member, first post and a pleasure to meet you all - the problem i was having is resolved, but i thought i'd post it for future reference

i replaced the bulb on this unit, cleaned the machine out & reset the lamp timer - but the customer called back saying the machine was overheating and turning off after 5-20 minutes

so i dismantled the machine, cheated the interlock and left the top cover off to check fan operation - all 4 fans were running, yet the lamp temp kept climbing til shut-off - as i was fluffing around i happened to look through the lamp exhaust fan at the light source and i noticed the exhaust fan was turning slower than the other fans of the same type, so i swapped out the exhaust fan with the power supply fan and no more overheating

replaced the fan and now all good

Re: Mitsubishi WD720U overheating after new lamp

Posted: Fri Jan 29, 2016 10:43 pm
by ChubbsTech
Hello aAandy,

Thanks for the information. I am sure it will help someone down the road. Take care !