Suspiciously low. Output from the 7805 regulator (IC701) should be closer to 5.6 V. Please check input voltage across C707/708. If at least 7.5 V or so, I'd supsect a bad regulator.+4.3v on pin 1of CZ706
There is a +12V output jack (3.5 mm or 6.35 mm stereo jack) as well, please check what's coming out of there.
- Solid State
- NAD C370 problem