wrote in message
ups.com...
This one is dead with no click. Is there a site where I could download
the service manual? Any help with this is greatly appreciated. Thanks

You likely will not find this manual in electronic form for free. It was
only available in paper from Mitsubishi, so if anyone ever took the time to
scan it, they probably did it to make a buck.

I don't recall which on this set but there are only two likely sources.
Either the stby supply runs off of an idling main switching regulator or has
a traditional transformer and bridge rectifier. Tracing the ac line leads
to one or the other or both. Look for the rectifiers. In either case, the
ac or the switching signal has to be rectified.

Before you spend too much time you might want to make sure that you have an
ESR meter and learn how to find the leaky caps in these sets. Likely to
find that it needs a fistfull. Google Mitsubishi and capacitors...

Leonard