Re: Searching for 1901 monitor schematics

From: Richard Atkinson (
Date: 2002-02-12 21:30:15

On Tue, 12 Feb 2002, Marko Mäkelä wrote:

> Hallo Martin, hi cbm-hackers,
> Hmm, I think the 1901 (or some other C= monitor with RGBI input) was
> just discussed a few days ago here.  Could someone help this guy?  Can
> the gain be adjusted separately for each colour component?

The schematics I referred to are at:

I don't know about the differences between 1901 and 1902(A).

Incidentally, I made a schematic of the proposed C128 VDC SCART lead;
still need to work out equivalent resistor values using the circuit in the
1902A. This adaptor would need to occupy a project box and get power from
somewhere; fortunately Commodore put +5V on the 40 column video socket of
the C128 so if both leads run to the box and then two SCART leads exit
from it, all the electronics can be contained inside.

Can anyone give me a hand with these resistor values? I was never any good
at Thevenin's Theorem ;)


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