The first thing is to look at the back of it and see it the output is AC or
DC. Then measure the output voltage with the appropriate scale. If the
desired output is DC, there is always the chance that you're not getting a
clean output - check it with a scope to see.

WT


"John Russ" wrote in message
...
I'm ahving problems installing an infra red TV relay. The
manufacturer thinks its the power supply. Does any one know how to
test a Class 2 transformer? It is the usual wall plug transformer
with a mini plug that plugs into the device.
I'd appreciate some advice.
John