Author Topic: U5000 no picture/low frequency squeal (Read 1428 times)

Q*Bert_OP · « **on:** April 28, 2011, 07:32:50 pm »

I have a U5000 monitor that I'm working on. It had a shorted HOT, replaced and the monitor fired up...somewhat...

It is making a "squeal" like a low-res monitor should, but at a much slower frequency. I am running in 15K mode. There is no picture, but the over current shut down circuit is not activating.

I did a full re-cap to this monitor chassis 4 years ago, but it hasn't been used since.

MonMotha · « **Reply #1 on:** May 02, 2011, 12:58:59 am »

IIRC, this has a SMPS? Check over in the power supply section for the squeal. Switch mode supplies can do that if abnormally loaded or sometimes just during normal operation. May still be a dead component that isn't drawing enough juice to shut it down.

Ken Layton · « **Reply #2 on:** May 03, 2011, 12:11:20 am »

Be sure it has all three "service kits" (retrofits) installed:

http://home.comcast.net/~mtpacifico/_kenskorner/files/WG%20U2000%20-%20U5000%20Service%20Kits.pdf


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Author Topic: U5000 no picture/low frequency squeal (Read 1428 times)

Q*Bert_OP

U5000 no picture/low frequency squeal

MonMotha

Re: U5000 no picture/low frequency squeal

Ken Layton

Re: U5000 no picture/low frequency squeal