test-drb July 2006

test-drb@ccmp.vtda.org

204 participants
377 discussions

by starmaster＠gmail.com

And thusly were the wise words spake by Star Master > > Does anyone know where I can get an MSD SD-2 Service Manual? I'm willing to > pay an indivual or a company (Can't find one that has it). > Thanks This has the schematics and user manual: http://staff.washington.edu/rrcc/uwweb/MSD-SD2/ Cheers, Bryan Thanks Bryan, I already found those...However I need the service and or diagnostic info for it. When I turn it on all the lights turn on and stay on, and it is not seen by the computer. Anyone else? Thanks

18 years, 5 months

VMS program to read/write simh .tap container files?

by aek＠bitsavers.org

> It is usual to bake the tape at a low-temperature owen (a box with foil > paper and an incandescent lamp) to dry the humidity of the tapes. It makes > them less sticky, but PLEASE do not try to re-run the tapes. It is enough to > save the contents, but not always make tapes useable again > > This is an old tip from recording studios... Bertram and Cuddihy "Humid Aging of Magnetic Recording Tape" IEEE Transactions On Magnetics Sep 1982 Has a detailed analysis of the failure mechanism in the binder, along with some temperature/humidity curves that show the rate at which the binder can be rejuvenated. I just bought a Toyo Living controlled humidity chamber this past week to begin the exact characterization of the temperature and humidity protocol required to process 1/2 tapes so that they can be read safely. The whole "baking tapes" process has way too much black magic involved, and I have tapes at the Museum that I have to read that are irreplaceable (and VERY old) so I don't have the option of just throwing them onto a drive and see if they start to squeel. After that is dealing with DC-300's and DC-100's that I've observed with exactly the same sticking problems. Fortunately, the Museum has very few TK50s

18 years, 5 months

VMS program to read/write simh .tap container files?

by aek＠bitsavers.org

> Now if only there were some magic to keep a TK50/TK70/TZ30 drive working > for more than ten minutes. Ten minutes sounds about the right length of time for the first traversal of the tape, at which time the collected sticky crud from most old tapes is deposited at the end of the track when it reverses direction, and then proceeds to stick the tape to the head. I don't know if the formulation of the tapes is such that you can remove the stickiness with heat/dehydration. This is also something I need to try on DC-300 carts that have become sticky. You also need to THOUROUGHLY clean the head stack. I have a TZ30 that I leave partially disasembled so I can pull the stack out the top so it can be cleaned with isopropyl on a cotton swab. -- It's probably time to put together lists of what TK50s (distr at least..) have already been read to save others the grief of dealing with old sticky media.

18 years, 5 months

Rotec industry PC

by ying6926＠ureach.com

Hi I am looking for Rotec Gamma 4 industry PC. I wonder if anyone has any information. thanks Henry

18 years, 5 months

OT: Electricians was Re: IC pin corrosion

by compoobah＠valleyimplants.com

> And then there was the attempt when wiring up an outside light where the kid >decided to hook both wires from the light and both wires from the feed up to >the switch. Turned the breaker back on and the light was on all the time, >until he flipped the switch, which popped the breaker, because he had it >going _across the line_. Unorthodox, but it does work . . . I know for a fact that Silicon Graphics used a similar system on some machines (Twin Tower, possibly others) to shut down the power supply if sufficient bits were removed to impede cooling. Not sure if it was the same designer . . .

18 years, 5 months

Looking for some HP LJ3 repair hints and a paper tray

by philpem＠dsl.pipex.com

Hi, I've got a Laserjet III that's intermittently throwing Service 50 errors. Fusing lamp tests good as per <http://www.fixyourownprinter.com/reference/guides/fuser/sx>. I assume this means the AC power module has fried itself. Best I can find on Google is that I need to replace the triac and some 'support components'. I can find component designator IDs, but not component values - does anyone know what needs replacing, and what to replace it with? It's also been throwing 13 Paper Jam errors, but there's no paper jam visible. Anyone know what causes this? I'm guessing the optosensor on the fuser assembly has failed, but I can't identify the opto. Does anyone have a part number for it? Finally, if by some twist of fate I manage to get this thing running, I'm going to need an A4 paper tray. Anyone in the UK got a spare they feel like parting with? Thanks. -- Phil. | Kitsune: Acorn RiscPC SA202 64M+6G ViewFinder philpem at dsl.pipex.com | Cheetah: Athlon64 3200+ A8VDeluxeV2 512M+100G http://www.philpem.me.uk/ | Tiger: Toshiba SatPro4600 Celeron700 256M+40G

18 years, 5 months

So how was VCF Midwest?

by evan＠snarc.net

Anyone have a report...?

18 years, 5 months

Pack Inspector

by jwstephens＠msm.umr.edu

I purchased a Computer Link Pack inspector about 2 months ago on Ebay. I just got a junk pack to play with this week (same vendor). It is marked "Master Alignment Pack" and is declassified navy badged. Anyway though people might get a kick out of it. I would love to have a real use for it, but it is just for collection and display purposes. Jim http://jwstephens.com/pack-insp-2006-07-20/page_01.htm

18 years, 5 months

looking for a book suggestion

by JEphraim＠ci.southlake.tx.us

I have several old Apple IIs, a TRS-80 (new in the box), and a few other older computers. I would like to get them all running again, if possible. I have been putting computers together since the late 80s, but have little knowledge of actual computer electronics repair (soldering, replacing broken wires, etc.). I would appreciate any suggestions about good, accurate, thorough books to purchase so that I can start teaching myself the basics. There are a number of such books out there, but I am having difficulty evaluating the accuracy and thoroughness of them. Since this question is probably not of interest to many others on the list, please feel free to email me any suggestions at jephraim at ci.southlake.tx.us Many thanks! Jesse Ephraim Adult Services Librarian Southlake Public Library 1400 Main Street, Suite 130 Southlake, TX 76092 (817) 748-8247 jephraim at ci.southlake.tx.us "A circulating library in a town is as an evergreen tree of diabolical knowledge." - Richard Brinsley Sheridan (1751-1816)

18 years, 5 months

MicroVAX I

by emu＠e-bbes.com

Hi all, anybody out here has the printset for the MicroVAX I (aka KD32) ?

18 years, 5 months

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test-drb July 2006