HP Forum Archive 19

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Signed Logic PCB Message #1 Posted by Ignazio Cara (Italy) on 16 Mar 2009, 12:58 p.m. 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

Re: Signed Logic PCB Message #2 Posted by Randy on 16 Mar 2009, 2:20 p.m., in response to message #1 by Ignazio Cara (Italy) 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.

Re: Signed Logic PCB Message #3 Posted by Ignazio Cara (Italy) on 17 Mar 2009, 4:45 a.m., in response to message #2 by Randy Thanks Randy. Regards Ignazio

"signing" Message #4 Posted by Frank Boehm (Germany) on 17 Mar 2009, 8:47 a.m., in response to message #1 by Ignazio Cara (Italy) 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 :)

Re: "signing" Message #5 Posted by DaveJ on 18 Mar 2009, 5:58 a.m., in response to message #4 by Frank Boehm (Germany) 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.

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