Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

 
 
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Juan Villagra
 
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Default ViewSonic E71 with extrange sympthoms...

Hello everybody:
I need help with this E71 Viewsonic monitor. I have several with
similar issues:

- Some dark an unwashed image, looks like normal TRC decay, but i
wish to know if is there any way to recover this. Some video circut
intervention or so.
- In some units ther is a "ghost image", like in a bad-tuned TV, but
more soft and stable. It manifest as some vertical white shadow lines
in the left side, and some "reflex" images at the right side of the
windows. Both are "echos" of the boundaries of the images (borders of
display and window frame respectively). I must say that it occurs
after a replacement of the Horizontal Output Transistor, after the old
one blows.
- Ocasionally, it quickly switchs the width, becoming narrow, and
then it comes back to normal, it isn't critical, but is some annoying.

This monitors, if repaired and adjusted, are for use with CAD/CAM
softs, (Autocad, ArchiCad, etc...), so i need to put them as good as i
can.

Thanks for any help.

JCVH
ERdM
 
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