Re: (ET) Blown I5 Part

["RJ Kanary" <rjkanary nauticom net>]

              Not really. :) The Metal Oxide Varistor needs to have a 
voltage rating that is at least 50% higher than the system voltage should 
ever be. The diode ratings need to be 3 to 5A with a PIV of at least 100 V.
              Check RadioShack's online catalog, and I'm certain you'll 
find what you need . If you need help with the drawings, I can post some on 
my server as soon as the folks at Affordable Hosts can return my Humpty 
Dumpty omelet server back to the egg state.

----- Original Message ----- 
From: "Dave Stensland" <evmailbox frontiernet net>
To: <elec-trak cosmos phy tufts edu>
Cc: "RJ Kanary" <rjkanary nauticom net>
Sent: Friday, December 30, 2005 2:40 PM
Subject: Re: (ET) Blown I5 Part


> Thanks RJ,
>
> No, my Homeowner's Service Manual went along with my E12M when I sold it.
>
> The soldiering is easy. Determining the correct replacement parts is the 
> tricky part.
>
> -Dave
>
> On Dec 30, 2005, at 1:43 PM, RJ Kanary wrote:
>
> >         You have issues with both the Diode Varistor Assembly, which is 
> > most of the field control circuitry, and the Diode Array, which has to do 
> > with armature contactor control.
> >        Do you have a Homeowner's Service Manual? If you do, repairing 
> > these yourself isn't much of a chore.
> >       A trip to RadioShack®, some quality time with the soldering pencil 
> > of your choice, and you'll be ready for the next snowfall.
> >
> > ----- Original Message ----- From: "Dave Stensland" 
> > <evmailbox frontiernet net>
> > To: <elec-trak cosmos phy tufts edu>
> > Sent: Friday, December 30, 2005 1:16 PM
> > Subject: (ET) Blown I5 Part
> >
> >
> > > Hello folks,
> > >
> > > My I5 is a bit temperamental lately. A couple of weeks ago it blew open
> > > a small diode behind the firewall. While that diode was out the I5 had
> > > one fast forward speed. I replaced that diode and the other forwards
> > > speeds worked again, but I also noticed a blow/corroded MOV or
> > > capacitor on another board of unknown function. I'm not sure what it is
> > > and I don't have a schematic.
> > >
> > > Can anyone tell me what this part is?
> > > http://www.megawattmotorworks.com/files/poof.jpg
> > >
> > > Thanks,
> > > -Dave Stensland
> > >
> > >
> > > _______________________________________________
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> > > Elec-trak cosmos phy tufts edu
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