Amiga.org

Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: Amigaz on March 01, 2009, 01:06:50 PM

Title: Compserv Scandoubler II
Post by: Amigaz on March 01, 2009, 01:06:50 PM

Have noticed my Compserv Scandoubler II in my A4000T has quite a lot of flickering pixels in all modes
I noticed it has an adjustable thingie which you can turn with a flatblade screwdriver
Does anyone know if it has the same function as the adjustment screw on the Amiga 3000 scandoubler?  

LINK (http://amiga.resource.cx/photos/scandoubler2,ScanDoublerII-3)

Title: Re: Compserv Scandoubler II
Post by: Mugo on March 01, 2009, 02:11:49 PM

Yes, it's a variable capacitor.
It's there to adjust the oscilator frequency, so you can compensate the kind of image imperfections that you described.

Title: Re: Compserv Scandoubler II
Post by: keropi on March 01, 2009, 03:43:50 PM

I had one too long time ago... never got it working 100%... I also remember some pink flickering pixels... luckily the smaller v1 Arxon works perfect, no screws no fiddling!

Title: Re: Compserv Scandoubler II
Post by: Amigaz on March 01, 2009, 04:12:23 PM

The weird thing is that it worked flawlessly when I had it in my Micronik A4000T
Must be some other timings in this real A4000T that's causing my small problems..

Title: Re: Compserv Scandoubler II
Post by: Amigaz on March 04, 2009, 08:03:31 PM

Problem solved!

Moved jumper JP1 according to the manual http://amiga.resource.cx/manual/Scandoubler-II.pdf