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HP 41C DOES NOT BEEP
08-30-2014, 08:54 PM
Post: #19
RE: HP 41C DOES NOT BEEP
(08-30-2014 08:25 PM)Geoff Quickfall Wrote:  AHHHHHH!

that explains a lot. see the PCB that has been removed from the board that looks like yours?

That is the CX version containing the extended functions, memory and timing chip. So your board is a standard halfnut with the CX portion removed.

Good research, should have checked with Diego first. You can see the attachment points for the board to convert it to a CX. They are the four contact solder points on either side of the keyboard PCA.

d8-)

so in a nutshell or halfshell you have a:

  1. repaired 41C with the halfnut board as this was never a retail option.
  2. the board is the same as the CX and CV board but minus the mini board containing the timing and extended memory functions.
  3. to turn it into a CX you would require the mini board or an extended functions, extended memory, quad memory and timing modules. But why mess with that raritiy...

the circle is now closed but:

1) sure it's a repaired version and somebody could have easily attached a new 41c label at the foot of the calculator, maybe a CX or a CV after removed the miniboard, but.... IMHO, HP instead prepaired specially new complete boards with keyboards, I mean , with white frames (in place of the yellow ones) for this kind of "quick" replacement.
For this reason only it could be really a interesting rarity

2) of course far from me the idea to add any miniboard which I guess shold be attached in the upper area (back to the display), the calculator came already supplyed with additional memory and X-functions .....just let me plug a time module when needs 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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