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Main => Monitor/Video Forum => Topic started by: claysred on March 09, 2009, 08:54:52 am

Title: Well Gardner U5000 issues
Post by: claysred on March 09, 2009, 08:54:52 am

I have a WG U5000 monitor that was squished at the bottom of the screen.  I called WG and bought the 3 service kits and a cap kit.  I installed all three kits and the cap kit.  Upon firing the monitor up, the bottom of the screen was still squished, and the image was upside down.  I figured I had hooked the yoke wires up backwards, so I removed the yellow & green yoke wires and reversed them.  The image now was correct vertically, but was backwards left to right.  SO, I grabbed the red & blue yoke wires and reversed them.  Of course I did it powered up and when I did this last swap, the monitor went blank and will not power up.  No neck glow, nothing.

Can someone send me in the right direction.

Thanks!

Title: Re: Well Gardner U5000 issues
Post by: grantspain on March 09, 2009, 09:25:06 am

the U5000 does not like anything like this done to it,I should know I blew the crap out of one by leaving the control pcb disconnected
It could anything causing this,my guess though is that the HOT has blown
the only advice i can give is go to the WG website and download the repair guide and go through everything relevant to your fault

Title: Re: Well Gardner U5000 issues
Post by: Ken Layton on March 09, 2009, 12:14:49 pm

Never never never never never connect/disconnect the yoke or the remote adjustment board while the monitor is powered up!
Severe damage may result.

Title: Re: Well Gardner U5000 issues
Post by: qrz on March 09, 2009, 10:20:09 pm

as per Grant,  hot failure.

removing the h yoke connection greatly increased the "on time" for the xistor .
the increased current/thermal load caused it to fail.

note: there is roughly a 1200vpp pulse present on the the xistor side of the h yoke.
so, you really don't want to mess with it while active circuitry ...  ;)

qrz