DM42 - display contrast

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Frank.upn
Posts: 6
Joined: Fri May 26, 2017 1:15 pm
Location: Germany

DM42 - display contrast

Post by Frank.upn » Mon Aug 27, 2018 1:59 pm

Hello,

somehow I'm too stupid to adjust the display contrast (is a bit too dark).
Can someone give me a short help?

Thank you

PS: Sorry, use Google translator

grsbanks
Posts: 713
Joined: Tue Apr 25, 2017 9:23 am
Location: Preston, Lancs, UK

Re: DM42 - display contrast

Post by grsbanks » Mon Aug 27, 2018 3:43 pm

Hi there.

I'm afraid there is no LCD contrast adjustment on the DM42.
Not SwissMicros staff, just an enthusiast.

Frank.upn
Posts: 6
Joined: Fri May 26, 2017 1:15 pm
Location: Germany

Re: DM42 - display contrast

Post by Frank.upn » Mon Aug 27, 2018 6:56 pm

Thank you!

Searched Homepage, Quick Reference Guide and Forums to find the display contrast setting.
Unfortunately, nowhere is it mentioned that contrast adjustment is not feasible
(It is possible with the HP-42s :) )

Logan
Posts: 20
Joined: Sat Jul 08, 2017 11:03 pm

Re: DM42 - display contrast

Post by Logan » Mon Aug 27, 2018 9:05 pm

With the HP 42s, you would adjust it by holding down ON and pressing + or -
I don't think Free42 has multi-button support so I'm not surprised the DM42 can't either. I confess I can't really see what would be gained by adjusting the contrast.
DM42 SN 210

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ijabbott
Posts: 113
Joined: Fri Dec 15, 2017 1:34 pm
Location: Manchester, UK

Re: DM42 - display contrast

Post by ijabbott » Tue Aug 28, 2018 9:51 am

I suppose the question remains why your display is "too dark", since the contrast on these displays is generally very good when viewed in well-lit conditions, certainly better than the contrast on the old HP-42S and similar two-line display Pioneer models, which wasn't that great.

mcc
Posts: 182
Joined: Fri Jun 23, 2017 3:10 am

Re: DM42 - display contrast

Post by mcc » Tue Aug 28, 2018 1:20 pm

Hi,

this is highly speculative but ...

IF (big IF) you use your DM42 and the display does face the boue sky it MAY (big MAY) happen, that a greater amount of polarized light
may (big MAY) hit it and gets NOT reflected by the rear of the LCD.
This is because LCD works with polarizing filters.
IF (big IF) this happens, turning the DM42 around the normal of the glass surface will fix that problem.

Normally indoors this effect is much smaller than outdoors.

Cheers! (big CHEERS! :) :) :) )
Meino
DM 42 - SN: 00373, Firmware v.:3.11. / 3.11. as compiled by SwissMicros

Frank.upn
Posts: 6
Joined: Fri May 26, 2017 1:15 pm
Location: Germany

Re: DM42 - display contrast

Post by Frank.upn » Tue Aug 28, 2018 2:04 pm

ijabbott wrote:
Tue Aug 28, 2018 9:51 am
... since the contrast on these displays is generally very good when viewed in well-lit conditions, ...
I can confirm that.
I'm satisfied with the DM42 display and did not want to get rid of any complaints here.

I am certainly spoiled by the very good HP10bII+ display that I use daily (for simple calculations, markup, etc.; unable to calculate properly %).
Continue daily the HP 17bII+ (for %, STAT and Solver) and the Sharp w506 (for non-financial calculations; unable to calculate properly %) :)

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