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41c series LCD displays
04-19-2024, 05:03 AM
Post: #1
41c series LCD displays
Hi All,

Within the full nut 41c calculators, are the LCDs interchangeable ? On older 41c calculators I noticed an extra connection on the left side, but I don't think it does anything. Newer 41c/cv/cx don't see to have that connection.

Any info appreciated about the displays, differences etc.

Thanks
John
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04-19-2024, 08:12 AM (This post was last modified: 04-19-2024 08:26 AM by Karel.)
Post: #2
RE: 41c series LCD displays
Hi.

Here is the service manual:
41c/cv/cx service manual


On the page 187-191 there is good info about display revisions.

I believe that the oldest display driver with square shaped "chips" - resin covers - is not forward compatible with newer ones with round shaped resin blobs. All the drivers with round resin blobs are interchangeable. Newer displays are a tad wider.

Karel
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04-19-2024, 08:26 AM
Post: #3
RE: 41c series LCD displays
Hi.

Here is the service manual:
41c/cv/cx service manual


On the page 187-191 there is good info about display revisions.

Karel
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04-19-2024, 08:52 AM
Post: #4
RE: 41c series LCD displays
https://www.hpmuseum.org/cgi-sys/cgiwrap...ead=206230

More on the original square driver displays. An older CL discussion.

Geoff
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04-22-2024, 11:11 AM (This post was last modified: 04-22-2024 11:19 AM by Johnboy.)
Post: #5
RE: 41c series LCD displays
Thanks Geoff and Karel, I don't seem to have any lcd displays with teh very square blobs, so I guess all my displays are compatible.

Cheers,
John
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