jec@nesac2.att.com (John Carter ATLN SADM) (08/06/89)
Does anyone have a schematic diagram of a Model II that I can get a copy of? I was given a Model II today with the comment 'The monitor doesn't work'. What I found on opening the cover was that the fuse in the power supply had been wrapped with foil and that the only things that work are AC operated (fan, disk motor, CRT heater). I'd like to see if it's worth fixing (I've used smaller and slower machines) but I'd rather do it cheaply. And it's not the oldest computer here - anyone else have a BYTE-8 ? (with rows and rows of toggle switches and LEDs - and about 2K of memory :-) -- USnail: John Carter, AT&T, 401 W. Peachtree, FLOC 2932-6, Atlanta GA 30308 Video: ...att!nesac2!jec Voice: 404+581-6239 The machine belongs to the company. The opinions are mine.
earl@trsvax.UUCP (08/07/89)
/* ---------- "Model II tech info / schematic" ---------- */ Does anyone have a schematic diagram of a Model II that I can get a copy of? I was given a Model II today with the comment 'The monitor doesn't work'. What I found on opening the cover was that the fuse in the power supply had been wrapped with foil and that the only things that work are AC operated (fan, disk motor, CRT heater). I'd like to see if it's worth fixing (I've used smaller and slower machines) but I'd rather do it cheaply. ********* And it's not the oldest computer here - anyone else have a BYTE-8 ? (with rows and rows of toggle switches and LEDs - and about 2K of memory :-) ********* I still have in my collection a antique circa 1975 RCA engineer's 1802 evaluation cpu board set. It used 256 bytes of memory, and LED's and toggle switches, and a manual push button clock. ******************** USnail: John Carter, AT&T, 401 W. Peachtree, FLOC 2932-6, Atlanta GA 30308 Video: ...att!nesac2!jec Voice: 404+581-6239 The machine belongs to the company. The opinions are mine. *********************************************************************** <This information is provided by an individual and is not nor should be construed as being provided by Radio Shack or Tandy Corp. Radio Shack/Tandy Corp has no obligation to support the information provided in any way. > Earl W. Bollinger @ <trsvax!earl>
uhclem@trsvax.UUCP (08/07/89)
<> B>Does anyone have a schematic diagram of a Model II that I can get a copy of? I have popped one for the power supplies and sweep board in the U.S mail today. It may not be much help as there are no values on the parts on the schematic. The Model II Technical Reference is the source, but it is out of print. For other parts of the machine, a 16B or 6000 service manual should suffice. B>I was given a Model II today with the comment 'The monitor doesn't work'. B>What I found on opening the cover was that the fuse in the power supply had B>been wrapped with foil and that the only things that work are AC operated B>(fan, disk motor, CRT heater). Probably you will need to replace the entire power supply. Several of the parts on that supply are not commonly available, and when a part in a switching power supply goes, it usually takes lots of its neighbors out too. Depending on how it died, the rest of the machine is probably ok. In any case, take the foil out and put a fuse in so we won't burn Atlanta again. The power supply can be ordered from Radio Shack National Parts. If you use a Mastercard or Visa, they will mail the stuff right to you (no messing with the stores who may try to sell you a remote-controlled car instead.) <My advice, and not that of my employer who would rather you buy several 4000 LXs right now.> "There's nothing wrong with your computer than an expensive service call can't prolong." - Wizzo Computer Company.