Thank you much. Something both easy and harmless to check. On Tue, May 17, 2016 at 3:09 PM, Gary Hammond <[email protected]> wrote:
> There is a -5v test point not far from the pot. When one of mine was doing > this, I found that the -5v rail would jump around when the screen was > playing up. The -5v is voltage divided by the pot so if it is low to start > with, the pot just makes it worse. For me, it eventually turned out to be > one or both of the diodes between the transformer and the -5v test point. > I’ve replaced the diodes and haven’t seen any issues since, however that > could also just be coincidence! YMMV > > > > > > Next, I have a m100 with a very faint screen. > > > > Originally the screen flickered bright dark randomly like as if the > contrast pot was bad. > > So I shot the contrast pot with DeoxIT D5, and the the screen went almost > out. > > > > It's not dead, just extremely faint. You can only see any contrast at an > extreme shallow angle. > > > > This was a few days ago. It got a little better after a day, but then > doesn't seem to be getting any further better since then. > > > > Is there a test point I can check or something to correct a voltage level? > > > > Should I wash that pot with some other product? I know there is a version > of deoxit that says it's for faders, maybe that? Or Alcohol to dry it all > out? (but then what do I put back in since you don't want to operate it dry > very much?) > > -- > > bkw >
