Signed Logic PCB
#1

Have you never seen a classic series logic PCB signed with 'PCM' near the 1820-1189 ROM? Look at the picture linked at:

HP_70_logic_PCB

Regards from Italy

Ignazio

#2

I've seen initials and other notations on most classics, especially those with ceramic packages.

Most pre-1990'ish Voyagers have initials of the final assembler under one of the foot pads.

#3

Thanks Randy.

Regards

Ignazio

#4

this is a manufacturer mark, added to the finalized layout by the PCB manufacturer (so you could track down faulty parts); it's nothing personal :)

#5

Quote:
this is a manufacturer mark, added to the finalized layout by the PCB manufacturer (so you could track down faulty parts); it's nothing personal :)

It's either a PCB manufacturers mark, or a "signature" of the board designer. If it's not on all boards, then most likely a manufacturer mark.

But I've had cases where my own "signature" on my boards have been eye-balled by management and removed in subsequent runs. At my current company we aren't allowed to add signatures to our
works of art :-(

Dave.

Edited: 18 Mar 2009, 5:58 a.m.



Possibly Related Threads…
Thread Author Replies Views Last Post
  RPN logic question Victor Quiros 52 10,986 03-12-2013, 02:59 PM
Last Post: Victor Quiros
  Updated HP-41 Flex-PCB replacement guide. Diego Diaz 2 1,317 03-12-2013, 12:36 PM
Last Post: Diego Diaz
  HP-65 logic board repair - help required Alberto Fenini 1 1,184 02-17-2013, 06:39 PM
Last Post: John Robinson
  PCB pictures of a HP10B, HP20S or HP21S? Christoph Giesselink 1 1,113 12-17-2012, 10:19 PM
Last Post: Randy
  HP-41C pcb connector upgrade Hans Brueggemann 6 2,429 05-19-2012, 10:17 AM
Last Post: aurelio
  HP-50G Equation Editing Logic Matt Agajanian 4 1,379 04-20-2012, 11:21 PM
Last Post: Matt Agajanian
  The story of HP's Logic Analyzers Steve Leibson 3 1,454 02-19-2012, 11:44 PM
Last Post: Bruce Larrabee
  HP-41C PCB Repair Question. Kerem Kapkin (Silicon Valley, CA) 10 2,918 11-21-2011, 07:45 PM
Last Post: BobVA
  Message to Diego Diaz about HP 41 flex PCB Alexander Oestert 0 819 08-02-2011, 08:57 AM
Last Post: Alexander Oestert
  OT: Help with Logic Dart AC adapter Donald Williams 9 2,606 03-19-2011, 10:22 AM
Last Post: Donald Williams

Forum Jump: