Failed output but fan continued. Any new ideas for that archetypal PbF symptom , of failure with owner and everything fine with repairer.? Initially litterally feather-touch twizzling ellicited nothing, plastic rod twizzling nothing. So now will have temporally "cured" any bad PbF joint. So next will be out with the big-guns, hot air and nylon bolt in engraving tool while listening to output on attenuatored headphones. Hopefully in speaker line as thermal sw is not in speaker line and owner reported not hearing hiss on the speaker when it failed, also checked not a speaker/lead problem. H&S issue, certainly QC issue, scrap of plastic? under the chassis ground solder tag complete with another star washer vaguely stuck to this plastic/paint film , awaiting a minor jolt to loosen , to fall into the amp. "Made in China" on the cab.
- posted
7 years ago