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9100Bs freshly acquired, weird variations
02-14-2019, 08:51 PM
Post: #1
9100Bs freshly acquired, weird variations
Hey there! New here, and new to vintage HPs. I have come into possession of two 9100Bs and a 9125. They’ve long been neglected, and I’m cleaning them up in anticipation of attempting to get one running.

So the question I have is that the power supplies are different. One is as you would expect, big thick wires, standard look. The other back panel is abbreviated, with a single plug, no s/n plates, and a much thinner wire running between the plug and power supply. The plug is also a different shape and has a 115/220V switch.

I’m quite confused. Any thoughts are welcome.

https://i.redd.it/5s51k5y7a3g21.jpg

https://i.redd.it/r96dutzojlg21.jpg

https://i.redd.it/wzojz20pjlg21.jpg
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02-14-2019, 11:50 PM
Post: #2
RE: 9100Bs freshly acquired, weird variations
HP switched from the earlier (pin-style) oval connector to the "standard" IEC connector during the 9100 production run. You can find illustrations of both types on page 29-30 of the 9100 Service Manual (09100-90034), available at hpmuseum.net.

My experience with HP machines of this vintage has been that HP used an adhesive to attach the s/n and name plates to these machines that tends to dry out and fail. On my 9100A, I had to reglue the serial number plate (loose, but held on by the power cord). The front identification plate fell off and was lost.

Enjoy your new machines!

Jack
http://www.computerarium.org
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Yesterday, 02:03 AM
Post: #3
RE: 9100Bs freshly acquired, weird variations
(02-14-2019 11:50 PM)jackrubin Wrote:  Enjoy your new machines!

Thanks so much. I'll check out the manuals and maybe get up the courage to plug one in and see if it works. I need to find screws to affix the power supply.
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