Emax

its the lcd thats broken check that your getting 5v on the lcd and -4.7 volts on pin 3
  ----- Original Message ----- 
  From: Bob King 
  To: emax@yahoogroups.com 
  Sent: Thursday, August 06, 2009 6:01 PM
  Subject: Re: [emax] Re: Hallo to the Emax community


    Thanks for the info,

  As the backlight PCB on my emax doesn't seem to have the trimmer could anyone suggest why I'm not getting any characters on the backlight when I turn the unit on. As I wrote before-it lights up fine. 

  Do the specifications on these electroluminescent sheets vary and could it be I've received and fitted the wrong type ?

  Thanks

  Bob
  --- On Thu, 6/8/09, emax_dx5 <cadena100rb@...> wrote:

  From: emax_dx5 <cadena100rb@...>
  Subject: [emax] Re: Hallo to the Emax community
  To: emax@yahoogroups.com
  Date: Thursday, 6 August, 2009, 11:07 AM

   

  Just point that not all emaxes have that trimmer for lcd contrast. I have got two Version 2 Rev C boards, one of those has the pot, and the other has just a fixed resistance.

  Regarding the backlight, it is an Electroluminiscent sheet. I've bought it in an electronics dealer and did mine. I've fixed my three emaxes backlight and now they shine as new. (electronics skill required for this, there are lot of volts under the screen for the EL sheet.

  --- In emax@yahoogroups. com, "midimal_music" <midimal_music@ ...> wrote:

  >

  > Glad to have found this buzzing community after owning an emax for many years.I'm now in the process of looking into whether I can SCSI up my Emax 1 SE which is something I've thought about doing a few times but was previously thwarted due to it not having the 5380 chip.I'm hoping this can be solved now with a kit from Ted Summers.

  > 

  > I also need a back light and was wondering if anyone could point me in the direction of obtaining one, specific part number ? I saw an HD44780 20X4 Character LCD Display with LED backlight on ebay and was wondering if I could use that? 

  > 

  > Thanks for any advice on this.

  > 

  > Bob K

  >











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