|
Open it, measure the primary voltage on the transformer, then the secondary voltage. If one reads something and the other doesn't, you have a bad transformer.
Else it could be a bad connection; the line voltage adjuster on tube testers sometimes opens up. Or there might be a fuse blown somewhere.
Don't assume it's the transformer unless your testing indicates that.
If you have no voltage at any setting, maybe the primary isn't getting any voltage.
|