No left channel TU-8600

Here are the voltages. What should I be looking at? TP28 and TP30 were especially egregious
 

Attachments

  • 20220409_183602.jpg
    20220409_183602.jpg
    370.5 KB · Views: 102
Thanks Audio Zen.

I emailed Viktor and he called me like 20 mins later! He also thinks it's probably a solder issue. I reflowed everything last night and still no left channel. I haven't rechecked the test points yet. I have yet to check the parts and orientation against the diagram

IDK if it's a new build or not, I bought it assembled.

Viktor also generously offered to look at it at AXPONA if he has time.
 
Check that the tube pins are covered with solder - on one of my builds my readings were high around the driver tubes. Looking at the pins at angles didnt show 2 pins that were not covered due the the shine from the solder and the pins. I only discovered this after closely looking at it with magnification. Re-soldered and the voltage readings were back on track.

Good luck and keep us posted.