It might be worth trying to talk to the IBM Museum at Hursley. https://slx-online.biz/hursley/contact_us.asp
Dave > -----Original Message----- > From: cctalk <cctalk-boun...@classiccmp.org> On Behalf Of Guy Dunphy via > cctalk > Sent: 23 July 2019 04:28 > To: Mattis Lind <mattisl...@gmail.com>; General Discussion: On-Topic and > Off-Topic Posts <cctalk@classiccmp.org> > Subject: RE: Scanning question (Is destruction of old tech docs a moral > crime?) > > At 07:16 PM 22/07/2019 +0200, Mattis Lind wrote: > >> BTW. I have three IBM 026 card punch machines as a future restoration > >> project. But can I find a service manual? No. None online, only one > >> for the later 028. And even if there was a PDF > > >Have you seen these: > >http://www.bitsavers.org/pdf/ibm/punchedCard/Keypunch/A24-0520- > 2_24-26_ > >Keypunches.pdf > >http://www.bitsavers.org/pdf/ibm/punchedCard/Keypunch/225-6535- > 5_24-Bas > >e_Machines_FEMM_Dec65.pdf > >http://ibm-1401.info/IBM-026-Wiring-228005P.html > > Last time I looked, in Sept 2018 I had previously found: > http://www.righto.com/2017/12/repairing-1960s-era-ibm-keypunch.html > https://www.flickr.com/photos/pfsullivan_1056/16296856470 > http://bitsavers.org/pdf/ibm/punchedCard/Keypunch/029/225-3357- > 3_29_FE_Maint_Man_Nov70.pdf > Bitsavers has a user manual: > http://www.bitsavers.org/pdf/ibm/punchedCard/Keypunch/A24-0520- > 2_24-26_Keypunches.pdf > And a field manual: > http://www.bitsavers.org/pdf/ibm/punchedCard/Keypunch/225-6535- > 5_24-Base_Machines_FEMM_Dec65.pdf > > But no schematics still. > > Your first URL is 404'd, though I already had that doc. Seems there's been a > tree structure re-org. > Now there's these: > http://www.bitsavers.org/pdf/ibm/punchedCard/Keypunch/024-026/ > 123-7091-3_24_25_Parts_Catalog_Apr1963.pdf > 225-6535-5_24-Base_Machines_FEMM_Dec65.pdf > 22-8319- > 0_24_26_Customer_Engineering_Preliminary_Manual_of_Instruction_1950. > pdf > 229-3125_24-26_Operators_Guide.pdf > A24-0520-3_24_26_Card_Punch_Reference_Manual_Oct1965.pdf > > Downloaded. > Looks like a good complete set, for mechanicals. Still no overall schematic. > Maybe it didn't exist? > > Gosh it's a scary-complicated machine. I'm not looking forward to finding the > gotchas, like obscure parts buried deep in the guts that have perished rubber > bits, complex precision surface-hardened things that are just plain worn out > and unobtainium, etc. > > >> I expect it would be the usual terrible quality. > > Pleasant surprise! The image quality of all those PDFs is pretty good. But all > still a mix of 2-tone and JPG encoding, with all their various artifacts. > Fortunately at high enough res to preserve all information. High enough even > to (mostly) preserve the ink screening dots in images. > > I'd still like to find original paper copies, both as a historical set with the > machines, and to scan-encode-wrap 'my way' for better looking digital > versions. > > > >> Ditto for a service/schematics manual for the Documation TM200 punch > card reader. No copy can be found. > > >Do you expect the TM200 to be substantially different from the M200? My > guess is that they are quite similar. > > Gone down the route of reverese engineering the differences? > > The TM200 has extra circuitry (more cards, wiring) than the M200, since it also > reads optical mark-sense cards. > Which means if ultimately I'm forced to reverse engineer the diferences, it's > going to be a lot of work. > There's no rush and plenty of other projects. I'd rather just wait more to see > if a correct manual turns up. > Not to mention that I'd like to find that manual in order to scan it. > > Guy
