Sounds like marginal power regulation. On Wed, 13 Apr 2011, Philip Lord wrote: > I have replaced nearly all the caps on the Monitor board. and cleaned the potentiometers. Now the monitor is 99% better. Still a very very slight shimmer of the screen which is noticeable when the cassette deck is on. Regarding the cassette deck. one totally unexpected side product of replacing the caps on the monitor board is that the cassette deck has become very reliable and loads programs 95% of the time, where as before I'd be lucky to get a good load in 10 tries. Not quite sure why changing the caps helped with loading...but it's all good. > > Phil > > > On Mar 28, 2011, at 9:27 PM, Philip Lord wrote: > >> Thanks Donato, I'll certainly do that too. >> >> Phil >> >> >> On Mar 25, 2011, at 5:44 PM, donato wrote: >> >>> Hello Phil, >>> >>> It's never a bad idea to replace all the old caps. >>> But the wobbling thing you are talking about, is probably a bad potentiometer. >>> Just get some contact cleaner and clean the potentiometers with it. >>> >>> Regards, >>> Donato >>> >>> >>> ----- Original Message ----- From: "Philip Lord" <random6000@mac.com> >>> To: <cbm-hackers@musoftware.de> >>> Sent: Friday, March 25, 2011 7:44 AM >>> Subject: PET 2001 fix Part 2 - The monitor >>> >>> >>>> Hi again, >>>> Now that the motherboard is working, I need to turn my attention to the crazy wobbling monitor. It basically wobbles all the time, but fluctuates between extreme and slight wobbling. >>>> Is it time to replace some caps on the monitor circuit board? >>>> >>>> If so, I was wondering if I should just attack the 4 big ones: >>>> >>>> C1 4700uf 25v >>>> C15 470uf 16v >>>> C28 10uf N.P >>>> C27 3.3uf 200v >>>> >>>> ...or should I do them all? >>>> >>>> Cheers >>>> >>>> Phil >>>> >>>> Message was sent through the cbm-hackers mailing list >>> >>> >>> Message was sent through the cbm-hackers mailing list >> >> >> Message was sent through the cbm-hackers mailing list > > > Message was sent through the cbm-hackers mailing list > wlevak@sdf.lonestar.org SDF Public Access UNIX System - http://sdf.lonestar.org Message was sent through the cbm-hackers mailing listReceived on 2011-04-14 05:00:13
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