From: Anders Carlsson (anders.carlsson_at_sfks.se)
Date: 2008-08-03 17:21:09
Hello, I have picked up a number of broken CBM 3040/4040 drives. They have various faults, and my hope was to be able to pull parts and assemble at least one, perhaps two working drives from them. Out of 6 drives, I have so far managed to find one working DOS board, one drive board and two mechanisms so I could put together one drive. In order to verify working parts, I start with plugging in the DOS board itself and read the error channel from a 8032 using PRINT DS$. Three of the remaining boards return a lot of garbage in an endless loop, while two boards do nothing. I don't think I have any 3040/4040 service manuals handy, although I found a 2031 one on Zimmers' FTP. Would that be of any use for me? More importantly, does anyone recognize the fault described above, where the error channel keeps spewing random data? Which chips if any should I suspect: 6502, 6522, 6532, ROM... or something completely different? Maybe those boards who show no sign of life would be easier to get to work. In that case, which chip(s) are most likely to be broken if it does not respond at all? I probably should plug in the power LED to see that it powers up, but if I understand correctly these drives don't blink in any pattern unlike the 8050, 8250 and the 9000 series hard drives. In other words, there still are a few things to pick up from my source, but most of it are partly broken stuff once returned by customers and then just stored away. All those drives come from that place, and I picked a few most likely to be repairable. Best regards -- Anders Carlsson Message was sent through the cbm-hackers mailing list
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