[A/S] Re: univolt

["schlumeterman" <wellsite@xxxxxxxxxxxx>]

I had a Univolt problem that I ended up finding was a problem with 
the 2 large fuse contacts. They had gotten a very slight and not 
visible corrosion type stuff (greenish) built up at the contact point 
between the fuse and metal holder causing a break in the electrical 
connection.

The following is some information that was once sent to me when I had 
mysterious electrical trouble.

"The only information on the UniVolt was developed by individuals 
that cracked them open and did them selves. The UniVolt's were 
proprietary units and never intended for field repair. Having said 
that they are actually quite simple. The complexity is in the 
transformer which either does or doesn't work. The remaining 
components are 4 diodes and 2 electrolytic capacitors. The diode work 
as a bridge rectifier to break down the transformers AC output into a 
rough DC voltage which are in turn filtered by the capacitors and the 
battery connected at the output of the converter.
Each of the diodes can be tested by carefully isolating one leg and 
checking it with an Ohm meter or equivalent.
The capacitors can like wise be tested, all though with an ohmmeter 
it is more difficult to do so accurately.
Both the diodes and the capacitor's have labels on them identifying 
their type, or size and rating.
The standard field test is with a good, charged battery installed and 
the coach in a location to be plugged in to shore power, measure the 
voltage at the battery with the coach unplugged. Then remeasure 
the battery voltage with the coach plugged in. A difference of +.5V 
is considered a good output measure.
Quite honestly with the new technology available in current model 
converter it is questionable to repair one of the old UniVolts."

Thanks to Charlie/Betty Burke for this information.

Good Luck!

Kelvin
1971 31' International