Emax

check the 5v at the floppy power connector 

and the invertor input 
  ----- Original Message ----- 
  From: David Sotnick 
  To: emax@yahoogroups.com 
  Sent: Monday, February 17, 2014 4:48 PM
  Subject: Re: [emax] Diagnosing non-functional Emax


    

  Hi Jammie,


  Thanks for the suggestion, however I think the PSU is fine. I read 5.04v on yellow, 12.3v on orange and -11.89v on violet coming off the PSU harness at the CPU PCB.


  -Dave

  On Feb 17, 2014, at 8:30, "jammie" <jammie.emma@...> wrote:


      
     

    sounds like you have lost the 5v connection

    the lcd uses 5v the cf card reader uses 5v and the floppy uses 5v

    i would check the 5v rail on the psu 
      ----- Original Message ----- 
      From: David Sotnick 
      To: emax@yahoogroups.com 
      Sent: Monday, February 17, 2014 4:25 PM
      Subject: [emax] Diagnosing non-functional Emax


        
      Hi all,

      Now it's my turn… I'm sad to report that my beloved Emax SE Rack which I upgraded to SCSI and slim floppy is no longer booting.

      Symptoms are: PSU voltages look good at the drive power connector. All LEDs on the front panel come on at power-on except load and enter. No LCD display and no floppy or CF reader activity. :-(

      I have re-seated all cables but have not yet removed and re-seated any socketed ICs. It has just been sitting in a rack, so nothing has been jostled.

      Any suggestions on where to start?

      -Dave

      p.s. even more frustrating: I missed out on a $60 working Emax SE on a local Craig's list ad which posted the day before I discovered my Emax was dead. :-(

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  No virus found in this message.
  Checked by AVG - www.avg.com
  Version: 2014.0.4335 / Virus Database: 3705/7098 - Release Date: 02/16/14