[sebhc] H89 strange problems....
bandit1921 at cox.net
Wed Jan 18 11:37:07 CST 2006
I used the big rectifier that Radio Shack used to carry..Part NUmber
At 11:56 AM 1/18/2006 -0500, you wrote:
> 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
Conbuilder debugger /Programmer
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