HP-87 power supply repair


Hello, I digged into my dead HP87 and identified the issue coming from a dead power supply. At least, I hope this is the only one : I noticed that some voltages were quite weird (+12V instead of -12V in one pin...) and hope it did not fry the CPU board as well.

Just wanted to know if someone in the community would be willing to sell some HP87 parts , if not I will continue the investigation using the service manual but it may take quite some time...

thanks in advance for your feedback,


Possibly Related Threads...
Thread Author Replies Views Last Post
  HP Prime Save Power Turn Off Not Working Timothy Roche 12 3,362 10-27-2013, 01:41 PM
Last Post: Michael de Estrada
  Low power warning for HP-15C LE and batteries Nick_S 1 1,118 09-16-2013, 09:34 AM
Last Post: Hans Brueggemann
  9815 data cartridge drive (also 9825 / 9845 / 85 / 87, and who knows what else) John Ioannidis 2 1,041 06-12-2013, 07:20 PM
Last Post: Craig Ruff
  HP 9845 option 200 power supply Dave F 2 1,302 05-30-2013, 08:10 AM
Last Post: Dave F
  HP 86/87 - CP/M Ph.Théry 3 1,081 05-27-2013, 04:02 AM
Last Post: Olivier De Smet
  Looking for HP-87 service manual philippe_elie 2 1,024 11-08-2012, 02:07 AM
Last Post: philippe_elie
  HP-48: extract coefficient of power series Thomas Klemm 3 1,231 10-21-2012, 11:42 PM
Last Post: Han
  HP-41CV power problem Don Davis 2 1,023 10-11-2012, 09:13 PM
Last Post: Don Davis
  What power adaptor does an HP-65 use? Robert Morton 3 1,145 09-30-2012, 02:32 PM
Last Post: Kees Bouw
  HP 15c LE low power anomalies Nick_S 21 3,957 03-31-2012, 09:32 AM
Last Post: uhmgawa

Forum Jump: