Casio CZ/ VZ/ FZ - Pro Series

sure its just not the backlight?
http://www.midi-rakete.de/eng/preise.htm

charlie

----- Original Message ----- 
From: <analogmonster@...>
To: <CZsynth@yahoogroups.com>
Sent: Tuesday, April 01, 2014 9:06 PM
Subject: [CZsynth] Re: Display


> Hate to be the bearer of bad news, but I dont think that a replacement is 
> possible at all, although my screen is still partly functional so perhaps 
> I havent tried as hard as I would if it was completely dead.  Its a custom 
> display and I am yet to find someone who has designed a replacement.  I 
> found this info by looking at the service manual for the vz1 - its the 
> same screen (I believe its the same as the FZ1/10 too), and is in the 
> photos section of this forum, look for 19_lcd_control.
>
> The screen itself is a 64x96 dot matrix display, driven from custom casio 
> LSI chips.  I cannot find any datasheet for the HD chips, they seem to be 
> a custom order from hitachi as there are similar numbered lcd drivers from 
> them.  The GAL PD65012 is still available as NOS (new old stock).  It is a 
> type of programmable logic device (PLD) from NEC.  What I dont know is 
> whether you can extract the programmed logic from a GAL in a working casio 
> synth, or whether you need some kind of source code.  It is likely you 
> need some pecialist programming machine or software package too.  But to 
> be honest the answer doesnt really matter if we cant get hold of the 
> hitachi chips.
>
> So the driver parts are exclusive to casio, so we cant just find a 
> replacement part and swap them.  I myself had planned to attempt to find a 
> 64x96 screen and try replacing just that part, but I struggled with that 
> too - just couldnt find a new one of the right size.  With some research 
> (cant find the links right now) I discovered that some casio calculators 
> have the same screen, so if you can find the same info you may be able to 
> rip one out of the right calculator and replace it.
>
> Like I said, my screen is not completely dead, although I thought it was. 
> I took my vz10 apart and cleaned up the insides.  There was some issue 
> with how the screen board connected to the main board, with some gentle 
> fiddling I got most of the lines of my screen back.  Its far from perfect, 
> but it is at least now usable.  Perhaps you will find the same.  Post back 
> if you get any results as I am sure there will be others who have dead 
> screen problems at some point.  Good luck!