IFR 1900 LCD brightness

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rgpace
New User
Posts: 11
Joined: Tue Nov 10, 2015 11:52 am

IFR 1900 LCD brightness

Post by rgpace »

I just purchased an IFR 1900, working great with the exception of the LCD brightness. Is there a way to increase/decrease the brightness? I may be super obvious but I cannot seem to figure it out. Thanks, Ron
jry
Posts: 484
Joined: Fri Feb 06, 2004 3:14 pm

Re: IFR 1900 LCD brightness

Post by jry »

do not believe the either the LCD version of the 1600 or the 1900 had a user adjustable brightness.

If there is an adjustment it may be in the LCD assembly for the back lighting intensity.

These are older LCD displays that use a high voltage supply and a CFL tube for back lighting. It could be either the supply or tube is weak if not adjustable.

It does run off the 12VDC so maybe a poor connection there.

You have to pull the front panel in order to get to the LCD IIRC
Audiotron
New User
Posts: 43
Joined: Wed Apr 05, 2017 5:51 am

Re: IFR 1900 LCD brightness

Post by Audiotron »

Hi Friend

By the time of use the CCFL lamps can be with excessive wear, I have replaced them with LEDs and their current control to modify the luminous intensity by PWM control
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