• We recently switched our forum platform. If you experience any issues please email support@crystalfontz.com

Urgent big problem with Seiko M4024

xenonfire

New member
Hi.

I got one handcontrol that is broken to an robot.
The old lcd screen i an Seiko M4024 rev.K.
And I replace it with a new Seiko M4024 rev.B.
But the screen dosen't start up.
Normaly then i connect the old screen the first and third row starts up. But not on the new screen (rev.B).
If I take onle the glas from the old screen and put it on new lcd card i got picture.
But it's not working if I take the glas from the new lcd board and put it on the old board. (Strange...)
I tried to change the contrast but without results.

Anyone that know what the differenses could be between the rev.b and rev.k ??

BR
Daniel
Looking for additional LCD resources? Check out our LCD blog for the latest developments in LCD technology.
 

CF Support2

Administrator
Daniel:

It sounds like there is difference in the contrast voltage. I did find a data sheet for the module, but it was free of any revision information. The contrast voltage was a range from 3v to 6v (listed as Vdd - Vlc). Is the glass from old unit damaged? If not, I would to ahead and use that since you have it up and running.
 
Top