blgardne@esunix.UUCP (Blaine Gardner) (07/18/89)
From article <0549.AA0549@worsel>, by blaine@worsel.UUCP (Blaine Gardner): > In the past few days my Amiga's (B2000, A2620, A2090A, 1M Agnus, ASDG 2MI) > system clock has been gaining lots of time, between 2 and 5 minutes per > hour. The battery backed clock is running perfectly, but the system's time > of day is in overdrive. Well after lots of false starts, I've got it fixed. Initially I thought I'd fixed it when I swapped the 8520's, but the problem was back the next day. Since that convinced me it was not hardware, I started looking at my software. VirusX and KV showed no infections, so I though I might have some flakey program causing problems. But when I let the system run overnight with nothing but "date" and "setclock load" having been run, the TOD clock still gained about 15-20 minutes. Now I'm looking at hardware problems again, but running out of ideas fast. Fortunately one of the local BBS users had the info I needed. He said that some of the Eltek power supplies have had problems with noise on the 60 Hz TICK line, and the fix was a .01 uf capacitor from TICK to ground, inside the power supply. It was a real job to tear everything apart to get to the power supply PC board, but since I installed the cap I haven't had any problem at all with the Time-Of-Day clock. Unless you've got lots of experience, this is definitely a job for your local dealer, but it has fixed the problem completely. -- Blaine Gardner @ Evans & Sutherland 580 Arapeen Drive, SLC, Utah 84108 Here: utah-cs!esunix!blgardne {ucbvax,allegra,decvax}!decwrl!esunix!blgardne There: uunet!iconsys!caeco!i-core!worsel!blaine (My Amiga running uucp) "Nobody will ever need more than 64K." "Nobody needs multitasking on a PC."