HP-71B Power Supply Question



#4

Hello!

Recently, I found a very nice HP-71B, but it dosen't like to power-up on batteries. Before I look inside (the operation will have to wait until I buy a new Torx T6 screwdriver anyway, the old one is too badly worn) I would like to try if the calculator works with external power.

And here is my question: Can I safely operate the 71B with the AC-
adapter of an HP-41 or one for the accessories of the 41 (printer, tape drive)? I have some of those, but not the original 71B adapter...

And while I am at it: Is there a resetting-procedure for the 71B other than the "On"-and-"/"-Keys-together from the manual which might cure the problem without any furter action?

Greetings, Max

NB: Looking forward to see this thing working in view of the coming "short&sweet math challenges" :-)


#5

The power supplies for the 41 and peripherals are the same for the 71. Earlier revs of the same power supply were shipped with the 97, and versions for the portable and portable plus, thinkjet, 9411 floppy and several other peripherals also work.

Regards,
Howard


#6

Hi!

Quote:
The power supplies for the 41 and peripherals are the same for the 71. Earlier revs of the same power supply were shipped with the 97, and versions for the portable and portable plus, thinkjet, 9411 floppy and several other peripherals also work.

Thank you for this reply, testing the calculator with the HP-41 charger helped me to confirm that the problem had nothing to to with the power supply. It turned out to be dust/dirt inside the keyboard and could be cured with compressed air. So now I have a working HP-71B :-)
My favourite LCD calculator (beside the wonderful Ti Voyage 200)!

Greetings, Max


Possibly Related Threads...
Thread Author Replies Views Last Post
  HP Prime Save Power Turn Off Not Working Timothy Roche 12 1,561 10-27-2013, 01:41 PM
Last Post: Michael de Estrada
  Low power warning for HP-15C LE and batteries Nick_S 1 596 09-16-2013, 09:34 AM
Last Post: Hans Brueggemann
  HP 9845 option 200 power supply Dave F 2 697 05-30-2013, 08:10 AM
Last Post: Dave F
  HP-87 power supply repair philippe_elie 0 404 11-18-2012, 11:12 AM
Last Post: philippe_elie
  HP-48: extract coefficient of power series Thomas Klemm 3 702 10-21-2012, 11:42 PM
Last Post: Han
  HP-41CV power problem Don Davis 2 555 10-11-2012, 09:13 PM
Last Post: Don Davis
  What power adaptor does an HP-65 use? Robert Morton 3 642 09-30-2012, 02:32 PM
Last Post: Kees Bouw
  HP 15c LE low power anomalies Nick_S 21 2,020 03-31-2012, 09:32 AM
Last Post: uhmgawa
  HP-71B HP-IL module question J-F Garnier 9 1,007 03-31-2012, 07:12 AM
Last Post: J-F Garnier
  strange classic power supply (pics) Alberto Fenini 4 880 01-16-2012, 02:06 PM
Last Post: Ethan Conner

Forum Jump: