Need help with sound valves VIP-101 preamp

I'm getting 16.5 volts from the transformer low output, don't know if that what I should have. U1and U2 are getting 3.8 volts in but no 12 volts out, I think these two regulators are good. Not blowing fuse and power led not coming on. I know a little about electronics but no expert by any means, I would be grateful for any help...
Follow up, replaced bridge for 12v a and b circuit. Unit is working but getting slight smell from new bridge. Half of old bridge was open not shorted and was not blowing fuse. The power transformer is getting warm but not hot and new bridge gets hot. I've read that these units had bridge problems but not sure if I still have problem downstream from something else. What do you guys think?