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HP 41C DOES NOT BEEP
08-30-2014, 05:31 PM (This post was last modified: 08-30-2014 05:39 PM by aurelio.)
Post: #9
RE: HP 41C DOES NOT BEEP
(08-30-2014 04:46 PM)Mark Hardman Wrote:  
(08-30-2014 04:13 PM)Geoff Quickfall Wrote:  Pictures of the serial number and more pics of the board with the black cover removed would be interesting.

Could you also please verify that the halfnut is actually a 41C and only has 63 registers?
Hi Geoff, hi Mark, the halfnut is really a 41c (63 registers) and I've checked for the serial it was made in the 82 year , 35th week, in Singapore (2235S4XXXX).
Geoff, I could send you pics in the original size (not formatted for the forum) but I think you need to see the rear of the board and I'm a little scared in removing it
Somebody knows the IC in place of the half-board?
I think maybe the "beep" missing could be due to a cold soldering, I added a magnified pic of the board and it seems the upper point could be one of those.

Actually I'm half-happy of the "sickness" of this beauty, otherwise never I was going to open it and find what we see Smile


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Messages In This Thread
HP 41C DOES NOT BEEP - aurelio - 08-26-2014, 02:55 PM
RE: HP 41C DOES NOT BEEP - Jim Horn - 08-26-2014, 09:30 PM
RE: HP 41C DOES NOT BEEP - aurelio - 08-27-2014, 06:42 AM
RE: HP 41C DOES NOT BEEP - Les Bell - 08-27-2014, 03:52 AM
RE: HP 41C DOES NOT BEEP - aurelio - 08-27-2014, 06:53 AM
RE: HP 41C DOES NOT BEEP - aurelio - 08-30-2014, 03:25 PM
RE: HP 41C DOES NOT BEEP - Geoff Quickfall - 08-30-2014, 04:13 PM
RE: HP 41C DOES NOT BEEP - Mark Hardman - 08-30-2014, 04:46 PM
RE: HP 41C DOES NOT BEEP - aurelio - 08-30-2014 05:31 PM
RE: HP 41C DOES NOT BEEP - jebem - 08-30-2014, 06:44 PM
RE: HP 41C DOES NOT BEEP - aurelio - 08-30-2014, 07:00 PM
RE: HP 41C DOES NOT BEEP - Mark Hardman - 08-30-2014, 06:29 PM
RE: HP 41C DOES NOT BEEP - aurelio - 08-30-2014, 07:33 PM
RE: HP 41C DOES NOT BEEP - Mark Hardman - 08-30-2014, 07:41 PM
RE: HP 41C DOES NOT BEEP - aurelio - 08-30-2014, 07:56 PM
RE: HP 41C DOES NOT BEEP - Geoff Quickfall - 08-30-2014, 07:02 PM
RE: HP 41C DOES NOT BEEP - aurelio - 08-30-2014, 08:13 PM
RE: HP 41C DOES NOT BEEP - Geoff Quickfall - 08-30-2014, 08:25 PM
RE: HP 41C DOES NOT BEEP - aurelio - 08-30-2014, 08:54 PM
RE: HP 41C DOES NOT BEEP - Geoff Quickfall - 08-30-2014, 09:27 PM
RE: HP 41C DOES NOT BEEP - aurelio - 08-30-2014, 09:56 PM



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