68kMLA Classic Interface
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| Click here to select a new forum. | | Fixing a IIgs monitor? | Posted by: olePigeon on 2012-05-30 15:02:09
I have an Apple IIgs in OK condition. The monitor is giving me issues. First, it makes a horrible high pitched sound when turned on (only slightly subdued when there's a picture on the screen, but still rather intolerable.) Second, the picture is near the bottom of the screen because if I adjust the vertical location, the picture becomes completely distorted and starts scrolling up and down.
Is this something I can repair? Anyone here used to fix CRTs?
Thanks
| Posted by: eraser on 2012-05-30 19:13:04
Have you checked the capacitors?
| Posted by: Bunsen on 2012-05-31 09:04:51
Try the TV repair FAQ. It's out there on the interwebs someplace.
| Posted by: techknight on 2012-06-03 07:14:43
kinda hard to tell by the description. Might need to do a short video or picture showing the symptoms.
The squeal is caused by a loose core in the flyback IF it sound like a 15khz squeal? The other issue sounds like a fault in the vertical circuit.
But at the same time, it could be all in the power supply and squeal is coming from there as well, and rendering a low B+ voltage. Does the picture appear to be slightly smaller than usual? not quite as much brightness, or brightness causes the raster to bloom? This would be indicative of low B+
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