[TechAssist] Question - internal 120V AC line varistors- surge suppressors
- From: Gary McCartney <gary@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Tue, 09 Dec 2003 19:24:34 -0500
In general, what is a good quality and rating of a varistor to use at
the 120V ac input of equipment where the varistor (surge suppressor) has
been blown up by a power surge?
Example, I have a Brother Intellifax 1270 fax machine that came in , hit
by a power surge. I found the varistor at the 120V AC power input (Z1 on
the power supply board) blowed up real good, along with the fuse which
was black as coal. These were the only faults as the fax machine works
now, however I don't know what varistor to use in place of the original.
Whatever the part was, it did a great job at protecting the power
supply. I will let the machine run awhile after repair in case the
mosfet switcher transistor was stressed in the action.
What would be the recommended voltage and amperage surge rating to
replace the original with, perhaps purchased from Digikey or other
similar generic parts supplier?
--
BTW, I titled the message the way I did because I thought I'd get more
responses than if I titled it, "brother fax machine....etc, etc.......)
Thanks for any help.
Gary McCartney
McCartney Electronics
Guelph Ontario Canada
Est. 1984
email: gary (at) number63.ca
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