Re: Blurry picture

From: Gerrit Heitsch <>
Date: Sat, 12 Nov 2011 12:56:20 +0100
Message-ID: <>
On 11/12/2011 11:04 AM, Michał Pleban wrote:
> Hello!
> W dniu 2011-11-12 10:48, Hoffmann-Vetter, Martin pisze:
>> Change the VIC-II and test if the problem leave or go.
> I replaced the broken VIC-II with another one I bought from eBay. The
> old one was R1, and the new one is R3. So this leads me to the question,
> are these versions fully interchangeable? Or do I have to get a R1 to
> work properly?

The 6569R1 can be replaced with a 6569R3 without problems. It is also 
advisable since it should produce a better picture (more luminance 
levels) than the R1. If you have a C64 handy, you should be able to 
borrow a VIC-II from there to see if that helps. A 6569R5 can be used 
too, but the HMOS-II Versions (8565R2?) can't!

Before you continue check if the +12V supply for the VIC-II is OK, it's 
pin 13 if you want to measure directly at the chip.


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Received on 2011-11-12 12:00:13

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