niemi@astroatc.UUCP (Bob Niemi) (06/17/88)
Once again the Astec power supply in my Osborne 1 has gone south for the winter without waiting for winter. Thought I would try to fix it instead of shotgunning it this time, but I have no information, schematics, etc. I would appreciate if someone could mail me a print, or tell me where to get one. Also, I recall an article (in FOGHORN?) identifying the cause of frequent power supply failures, but I can't find it in my limited resources. If anyone can help me I would appreciate it. Thanks. Bob Niemi, Astronautics, 5800 Cottage Grove Rd., Madison, WI 53716 Phone (608) 221 9001, Home (608) 592 3462, ...uwvax!astroatc!niemi
wjc@ho5cad (Bill Carpenter) (06/17/88)
In article <1061@astroatc.UUCP>, niemi@astroatc (Bob Niemi) writes: >Once again the Astec power supply in my Osborne 1 has gone south for the >winter without waiting for winter. Thought I would try to fix it instead >of shotgunning it this time, but I have no information, schematics, etc. >I would appreciate if someone could mail me a print, or tell me where to >get one. Sam's Photo-Facts now has a spinoff called Sam's Computer Facts which give complete schematics, test point voltages, etc. Most real electronics stores (like where a TV repairman or Ham operator might shop) carry bunches of these and can order any they don't have. I have a hazy memory of a note that Radio Shack now also carries them. Yes, I know Sam's has one for the O-1. Sorry I can't give you the specific number. I think it cost $10-15. -- Bill Carpenter att!ho5cad!wjc or attmail!bill
wilker@batcomputer.tn.cornell.edu (Clarence W. Wilkerson Jr.) (06/17/88)
I bought a non-functioning Osborne I at a garage sale. Where is a source of technical information ( schematics, etc? ); This one works as far as showing the initial prompt. However, it flickers badly if the keyboard is attached, and will not boot. Clarence Wilkerson
rusty@cadnetix.COM (Rusty) (06/21/88)
In article <1061@astroatc.UUCP> niemi@astroatc.UUCP (Bob Niemi) writes: ><question about osborne hardware info> Also, in another, unrelated article, someone asks for hardware info on the osborne 1... Amazingly enough, the Osborne 1 is one of the few computers for which you can get a Sams (r) Photofact (r) 'thingie'. Complete schematics! Go look in your local public library for this little gem. The Phoenix public library in Phx Az (not much use to you, probably.:-) had a complete set of Sams Photofact (r). If you are really lucky, your local library will too. Good luck. BTW, did you put any sort of spike protection on the power supply? I put 2 or 3 MOVs inside the case, and never had any problems. Also, I assume you know about the jumper which will make the serial port be 600/2400 baud instead of 300/1200? I mounted a switch on the case so I could easily switch between 300/1200/2400 (who needs 600, anyway? :-) ----- Rusty Carruth N7IKQ DOMAIN: rusty@cadnetix.com Cadnetix Corp. UUCP: cadnetix!rusty 5775 Flatiron Pkwy. {uunet,boulder,nbires}!cadnetix!rusty Boulder, CO 80301 (303) 444-8075