"Rich Grise" wrote in message
news
I have an "IBM ADF Color Scanner"

Thanks for the kind offer Rich, but I'm in the UK and have an old scanner
with a dead PSU and LPT interface, so that is for the chop if I want to play
with its innards.

I expect I'd need a lot of time with a scope, which I don't have.
An EE without scope is like a guy without a...
but I digress. Manage without for ages, looks like I need to find one good
enough and cheap enough. Sadly these criteria are hard to overlap.