[sebhc] H89 strange problems....
robin.england at dial.pipex.com
Wed Jan 18 14:01:20 CST 2006
Thanks guys! I was beginning to think I was going crazy! I'll replace the
bridge rectifier and solder the connections directly, will let you know the
----- Original Message -----
From: "Joe Smith" <bandit1921 at cox.net>
To: <sebhc at sebhc.org>
Sent: Wednesday, January 18, 2006 5:37 PM
Subject: Re: [sebhc] H89 strange problems....
> I used the big rectifier that Radio Shack used to carry..Part NUmber
> is: 276-1185
> At 11:56 AM 1/18/2006 -0500, you wrote:
> > Robin;
> > Those are hum bars in your video, and your troubleshooting is in
> > the right area -- the power supply. One weak point in these units
> > is the bridge rectifier. It's the large one in a metal case with
> > four push-on terminals. Replace it with one rated for higher current.
> > While you're at it, replace the connectors with soldered
> > connections to both ends of the wiring to the bridge. The molex
> > connector would frequently fail from overheating due to the current
> > it carried. Soldering the wires to the bridge and the circuit
> > board will remove this as a future problem.
> > After fixing many of these back in the day, I sent it in to
> > Heath/Zenith and they published it as a service note.
> > Paul Pennington
> > Augusta, Georgia
> >Delivered by the SEBHC Mailing List
> Joe Smith
> Conbuilder debugger /Programmer
> Delivered by the SEBHC Mailing List
Delivered by the SEBHC Mailing List
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