Emax

Hello, i have found the diagnostics for the emax II and I assume that this is the same for the emax I also: My emax lights the two following lights at start up and i am unable to boot the emax any further. 

PRESET DEF. -   Turned off if the floppy controller can
                seek to track 00. This requires that both
                the floppy chip and the drive be
                connected.
DYNAMIC PROC. - Turned off after a complete software
                boot.

 My question to the group is if the emax is exhibiting this type of behavior what are the first troubleshooting steps that I can do before shipping the emax for professional repairs? Any advise would be welcomed i would like to work on this over the long weekend and determine if I can fix this or if it needs to go to someone more capable. 

Kevin Kelley 
Emax se hd, Emulator I, Emulator II + hd

Hello:
According to the Emax I diagnostics:

Preset Definition LED:
Wrote command to 1772 Floppy Disk Controller to restore head on
the drive, but the drive never reached track 0, or the 1772 never
responded.
Analog Processing LED:
Unable to load software from disk.


So, it is basically the same as for the Emax II. I should suggest you to open the unit (Of course, some basic electronic skills needed, specially about pulling out the ac power outlet and being careful to not touch the Power supply unit due to charged capacitors, also be previously grounded before touching any ic on the motherboard), and then check the wires to the floppy, both power and data, also the floppy controller IC.

Best..



--- In emax@yahoogroups.com, "xirin6" <xirin6@...> wrote:

>
>  Hello, i have found the diagnostics for the emax II and I assume that this is the same for the emax I also: My emax lights the two following lights at start up and i am unable to boot the emax any further. 
> 
> PRESET DEF. -   Turned off if the floppy controller can
>                 seek to track 00. This requires that both
>                 the floppy chip and the drive be
>                 connected.
> DYNAMIC PROC. - Turned off after a complete software
>                 boot.
> 
>  My question to the group is if the emax is exhibiting this type of behavior what are the first troubleshooting steps that I can do before shipping the emax for professional repairs? Any advise would be welcomed i would like to work on this over the long weekend and determine if I can fix this or if it needs to go to someone more capable. 
> 
> Kevin Kelley 
> Emax se hd, Emulator I, Emulator II + hd
>

Don't know if this is a generally good advise,
but i had to push the IC's down into the sockets from time to time.
A little press on the front panel, about inch left of the numpad, often 
helped the start up process.

Thank you for the advice I did try all of the recommendations and it is still doing the same boot lock. One thing I did notice is that when powered on it sounds like a relay or something click and both the hd and the floppy do not move. Could my problem be power supply related? 
 
Kevin Kelley 

--- On Sat, 9/5/09, Michael Wisbech <michael@...> wrote:

From: Michael Wisbech <michael@...>
Subject: Re: [emax] Re: Emax repair diagnostic questions
To: emax@yahoogroups.com
Date: Saturday, September 5, 2009, 11:28 AM


  



Don't know if this is a generally good advise,
but i had to push the IC's down into the sockets from time to time.
A little press on the front panel, about inch left of the numpad, often 
helped the start up process.

















      

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