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HP48SX display
01-04-2018, 09:18 AM
Post: #1
HP48SX display
As this is my first posting here - hello everybody!

I've bought my 48SX somewhen in the early 90s. As it always was a pain in the ass to me working with a display that's either to dark or to faint with poor contrast, depends on ambient light, it rested well in some drawers. I took it out from now to then, played some time, used it, but never got very fond of it like with the 41C/CV or 42S.

Now I'd like to know if there's a chance to get a better display and replace the old one - either by myself or a company.

The 48SX is still a great little monster that I want to use and play with.

Thanks in advance,
KiS

HP: 20S 25C 32S 33E 33s 35s 41CV 42S 39GS 48SX 71B
Casio: FX702P
Swissmicros: DM15L
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01-04-2018, 03:56 PM
Post: #2
RE: HP48SX display
There are a few more recent calculators that can serve as donors for replacing the stock 48sx display with a display with better contrast. Check this thread for an example.

http://www.hpmuseum.org/forum/thread-180...84075.html

~Mark

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01-04-2018, 04:43 PM
Post: #3
RE: HP48SX display
The 48SX screen is particularly good on a desk in an office environment. The screen is lower contrast overall, yes, but the darkened pixels also don't cast a shadow on the reflective backing like the 48GX does, making it easier to read the SX screen at low angles.
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01-04-2018, 04:43 PM
Post: #4
RE: HP48SX display
Have you tried adjusting the contrast by holding down the ON button while tapping the + or - buttons (darken or lighting, respectively)?

I am assuming you have but thought I'd ask to be sure.
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01-05-2018, 12:30 AM
Post: #5
RE: HP48SX display
(01-04-2018 04:43 PM)Chris Dreher Wrote:  Have you tried adjusting the contrast by holding down the ON button while tapping the + or - buttons (darken or lighting, respectively)?

I am assuming you have but thought I'd ask to be sure.

You assumed right. Yes I did.

HP: 20S 25C 32S 33E 33s 35s 41CV 42S 39GS 48SX 71B
Casio: FX702P
Swissmicros: DM15L
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01-05-2018, 02:05 PM
Post: #6
RE: HP48SX display
(01-04-2018 03:56 PM)mfleming Wrote:  There are a few more recent calculators that can serve as donors for replacing the stock 48sx display with a display with better contrast. Check this thread for an example.

http://www.hpmuseum.org/forum/thread-180...84075.html

~Mark

Hi mfleming,
thanks for this link.
I'd do swapping both displays by myself. But how about the status indicators?
I looked some 39G$-models on ebay and found at least the 39GS with not suitable as the dot matrix fills the whole windows.

HP: 20S 25C 32S 33E 33s 35s 41CV 42S 39GS 48SX 71B
Casio: FX702P
Swissmicros: DM15L
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01-06-2018, 03:55 AM
Post: #7
RE: HP48SX display
(01-05-2018 02:05 PM)Krauts In Space Wrote:  I'd do swapping both displays by myself. But how about the status indicators?
I looked some 39G$-models on ebay and found at least the 39GS with not suitable as the dot matrix fills the whole windows.
Are you sure about that? (IIRC, some calculators come with a transparent protective display foil showing some graphics for "demo" purposes.)

To the best of my knowledge, the 39G/40G, 39g+, 39gs/40gs, 48gII and 49G displays all provide 131×64 pixels, just like the 48S/SX/G/GX/G+. Only the 39gII, 49g+, 50g and Prime use displays with higher resolutions.

https://en.wikipedia.org/wiki/Comparison...alculators

Greetings,

Matthias


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01-06-2018, 04:13 AM
Post: #8
RE: HP48SX display
(01-06-2018 03:55 AM)matthiaspaul Wrote:  
(01-05-2018 02:05 PM)Krauts In Space Wrote:  I'd do swapping both displays by myself. But how about the status indicators?
I looked some 39G$-models on ebay and found at least the 39GS with not suitable as the dot matrix fills the whole windows.
Are you sure about that? (IIRC, some calculators come with a transparent protective display foil showing some graphics for "demo" purposes.)

To the best of my knowledge, the 39G/40G, 39g+, 39gs/40gs, 48gII and 49G displays all provide 131×64 pixels, just like the 48S/SX/G/GX/G+. Only the 39gII, 49g+, 50g and Prime use displays with higher resolutions.

https://en.wikipedia.org/wiki/Comparison...alculators

Greetings,

Matthias

I know that 39G+, 39GS use a different display from the 48SX it has soldered connections rather than the conductive plastic strip connectors used in the 48SX. I have never seen the inside of a 40GS or 48GII but the appear to be the same construction as the 39GS. For the display swap 39G, 40G, and 49G would be suitable donors. I swapped the display from a 39G into a 48GX and it works great.

Paul.
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