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Marantz varistors

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smashbeat

Active Member
Having an hard time figuring out where to find a couple of varistors used on the power board of the small 22xx marantz (2215 and 2220 bias for sure).
They are marked as h005 and h006 su-3a varistor on the manual.
A substitute part will work great.
Thanks!
 
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The part number, SV-3A, seems to suggest a three-diode-drop part, but the schematic shows only two diodes.

Are your devices missing? They rarely go bad. If you have one, a measurement with a multimeter diode test would be helpful.

As far as a replacement for the 2SC853, Digikey has some Panasonic 2SC39390SA devices left in stock that would work well (#2SC39390SACT-ND).
 
Thanks for the great info EchoWars. I was hoping you were going to chime in :)
As for the SV-3A I have a picture. They tested good, but one was broken and I can't solder it back. I have a picture. The schematics for those little Marantz are a bit confusing to me

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Rgr that.

The acid test is to measure the good one out of circuit. On most multimeters, a three-junction temp compensation device should measure around 1.55V (most meters put about 1mA of current through the diode test...chart of voltage vs. current here).
 
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