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+--- Thread: Question about the contrast of the HP-75C/D LCD (/thread-16585.html)
Question about the contrast of the HP-75C/D LCD - Namir - 04-01-2021 10:07 PM
Hi All,
Can one change the contrast of the LCD of an HP-75C/D? If yes, how?
Thanks!
Namir
RE: Question about the contrast of the HP-75C/D LCD - Sylvain Cote - 04-01-2021 10:44 PM
(04-01-2021 10:07 PM)Namir Wrote: Can one change the contrast of the LCD of an HP-75C/D? If yes, how?Hello Namir,
You have to open-up the 75 and manually adjust the LCD contrast with the potentiometer on the memory board.
Ref: PPC Computer Journal v2n5 Sept/Oct 83 Page 23, potentiometer VR at the top/right of figure 1.
Sylvain
RE: Question about the contrast of the HP-75C/D LCD - Namir - 04-01-2021 11:50 PM
:-(
That says it all! Was counting on keystroke sequence.
RE: Question about the contrast of the HP-75C/D LCD - Dave Britten - 04-02-2021 12:21 AM
(04-01-2021 10:44 PM)Sylvain Cote Wrote:(04-01-2021 10:07 PM)Namir Wrote: Can one change the contrast of the LCD of an HP-75C/D? If yes, how?Hello Namir,
You have to open-up the 75 and manually adjust the LCD contrast with the potentiometer on the memory board.
Ref: PPC Computer Journal v2n5 Sept/Oct 83 Page 23, potentiometer VR at the top/right of figure 1.
Sylvain
At least they didn't do like the Sharp PC-1211 and put a pot in there, but glue it in place so you can't adjust it.