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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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Ergoscan 17c Monitor problem
Hello,
I posted here a few days ago, but got no reply. Hopefully it's just because the person(s) who has an easy solution to my problems just missed the post :-) So I'll try one more time: My 17" ErgoScan pnp monitor worked just fine until a few days ago. Suddenly when I turned it on one morning, there was a high-pitched noise and a lot of distorsion (as if somethings not properly connected). When it's turned off and on again, the pictures is fuzzy with horizontal white lines for a few seconds, then it fades and becomes blueish with the above mentioned lines (2-3 cm in between). I've opened it up, but there's no visible burnout or anything loose. Knocking on the sides doesn't change anything, so it's probably not because of a bad connection somewhere. Any idea? Thanks in advance, / Jesper |
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Ergoscan 17c Monitor problem
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Ergoscan 17c Monitor problem
Your problem is much deeper than just simple voltages from the suppy or
similar. There are many factors concerning pulse drives, scan drives, HV regulation, biases to the CRT, and the performance of the scan circuits that mainly come in to effect for the overall performance. This is not to mention the video signal paths, and the control circuits for the systems. Start by verifying for the proper supply voltages to the CRT bias circuits. Check if the CRT screen volts is in specs, and if the HV is also in specs. You will require an HV probe to test the HV. There are many things that can display this type of effect on a monitor. I would suggest, if you are not experienced in TV and monitor service, to give the unit to a service centre that has trained technical staff with the proper test facilities to diagnose this type of fault. It can get very involved. -- Greetings, Jerry Greenberg GLG Technologies GLG ============================================== WebPage http://www.zoom-one.com Electronics http://www.zoom-one.com/electron.htm Instruments http://www.zoom-one.com/glgtech.htm ============================================== "Jesper" wrote in message om... Hello, I posted here a few days ago, but got no reply. Hopefully it's just because the person(s) who has an easy solution to my problems just missed the post :-) So I'll try one more time: My 17" ErgoScan pnp monitor worked just fine until a few days ago. Suddenly when I turned it on one morning, there was a high-pitched noise and a lot of distorsion (as if somethings not properly connected). When it's turned off and on again, the pictures is fuzzy with horizontal white lines for a few seconds, then it fades and becomes blueish with the above mentioned lines (2-3 cm in between). I've opened it up, but there's no visible burnout or anything loose. Knocking on the sides doesn't change anything, so it's probably not because of a bad connection somewhere. Any idea? Thanks in advance, / Jesper |
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