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vr201rep
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1994-02-22
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>The VR-201 monochrome monitor on my Rainbow just shuffled off this
>mortal coil and I need another. Any spares for sale out there? Any
>ideas on a cheap way to replace it? Please e-mail responses to the
>address below. Thanks!
If you can handle a soldering iron and a meter, then you can do a quick hack
like this (totally unaproved of by DEC of course).
Start off with a 15 pin D connector of the right gender to fit the monitor end
of the cable (I think you need a plug), and a 4-pin RJ11 (I think) to take the
keyboard cable. Now :
link pins 7 and 8 on the 15 pin D (+12V out)
link pins 4,5,6,13 on the 15 pin D (ground)
Looking into the face of the RJ11, with the pins towards you, number the
leftmost pin 1. Now link as follows
RJ11 pin 1 to pin 14 of the D
RJ11 pin 2 to +12V
RJ11 pin 3 to Ground
RJ11 pin 4 to pin 15 of the D
You should check those connections between the D connector and the RJ11 on your
existing VR201, in case I've noted them down wrongly
Now you need to find a composite mono monitor, capable of handling the USA TV
scan frequencies. Such monitors are relatively common, nut are not used with
PCs (except as a mono monitor on a CGA card I guess). Now find a video lead to
fit the monitor input, connect it's sheild to ground on the 15 pin D plug, and
the inner to pin 12.
Plug everything in, and it should work.