31 Oct
2016
31 Oct
'16
2:22 p.m.
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.
What is PET in this context? I am assuming it is nothing to do with Commodore.
Can you take a photograph of what you are seeing on the screen?
Regards,
Peter Coghlan.