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Old 20th Apr 2018, 8:44 pm   #16
peter_scott
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Join Date: May 2003
Location: Edinburgh, UK.
Posts: 3,274
Default Re: Sony 9-90 Width Control?

Well, I don't understand what happened there. When I powered it from 12 volts all I got was what looked like a switch off dot and I assumed I had connected it with the wrong polarity. I then connected the AC power and it too gave a switch off dot.

I had hoped to find that 2 amp fuse that the schematic shows in the 12 volt rail but it doesn't seem to exist. I did a few ohms checks and it looked reasonable so I carefully connected the 12 volts and to my surprise got a raster. At this point I figured I'd got off lightly and decided to package it up again although I couldn't resist straightening the scan coils as there had always been a slight tilt.

It's all back together now with a straight picture and looks sharp at moderate brightness levels so I think I'll call it a day.
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