[Duo2400] Re: Duo 2400 powerboard reliability problems

[fpentney]

Yes, there is a fuse. Cost $1 for the part and 45 mins to replace. I had mine
replacedafter a GLOD, rather than going through the usual motherboard repairs, DTT
etc. The "Do it Yourself" repair guide was provided by a list member and I believe
has been posted on the 2400 main site (Univ. of Waterloo). I would like to hear about
more people trying this method.

Fred from Toronto, ON,  Canada

Tom and Lisa P wrote:

> >Hi all,
> >I've been reading the DuoList for several months now
> >and learned of the 2400 GLOD problems. I'm curious if
> >anyone has looked at the design and tried to improve
> >on it? My thoughts are:
> >1) If it's heat related, the regulator IC may need a
> >better heatsink. The AC adapter puts out 24 Volts and
> >has to drop it to 12 and/or 5 Volts. That is a lot of
> >power to dissipate. The old linear regulators (if
> >thats what it has) have to continuously dissipate
> >P=V*I watts. I don't know how much current the 2400
> >draws, but if there's room to add a heatsink, it would
> >be good preventative maintainence.
>
> Which IC is the regulator ?
>
> >2) Does the powerboard have OVP (over voltage
> >protection) and a fuse? If the regulator did fail,
> >hopefully an OVP circuit would take over and clamp the
> >voltage to a safe value that wouldn't kill the logic
> >board!
> >3) I don't own a 2400, but I have a 2300c. Does anyone
> >know if they have the same powerboard reliability
> >issues?
>
> Not as far as I know.
>
> Mad Dog
>
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