31 Oct
2016
31 Oct
'16
3:06 p.m.
On 31/10/2016 22:22, "Peter Coghlan" <cctalk at beyondthepale.ie> wrote:
It says 10K on what's left of the wiper, there's a pic in an earlier message
Before I replaced the failed potentiometer (new one seen top left) the
display looked like its horizonal hold had gone so I reasoned that's what
the pot controlled. I can *nearly* get a steady picture but the brightness
is out as well, despite there being working pots for that and contrast. The
brightness seemed more constant before I replaced the radial cap with the
PET one which is why I wondered if the choice was wrong.
Did you measure the resistance of the track on the old potentiometer
and use something with a similar value for the replacement?
Is it possible that you misread or misinterpreted the value of the capacitor
that you replaced? You could try putting the old one back and seeing if there
is an improvement. from tonight :) I can't put it back because
it's physically rotted
unfortunately.
What is PET in this context? I am assuming it is
nothing to do with Commodore.
PET as in the plastic housing, PET Film cap. I figured my replacement must
be OK since there was one other on the board in that style already.
Can you take a photograph of what you are seeing on
the screen?
Once I've put it all back together, yes. Might be difficult to capture with
a camera though but I'll have a go.
Cheers!
--
Adrian/Witchy
Binary Dinosaurs creator/curator
Www.binarydinosaurs.co.uk - the UK's biggest private home computer
collection?