I have a Universum 16000 Super Sound, and it sounds great, except that sometimes the volume slooooowwwwwwwwly drops down to nothing (along with the power meter). This happens no matter if the radio or tape is playing. To bring it back to life, I have to shut it off and turn it back on.
I've gone in and cleaned all the switches and the AC input. So that's not the problem.
And now it's happening more often. It used to do it only once an hour or so. Now it does it within a few seconds after I turn on the box.
Do you think this is a bad amp chip? I do have a multimeter I could test with, but even if I successfully discover what's wrong, I would probably just give it to a repairman anyway.
I don't have as much patience as the rest of you to track down parts or learn how to solder. I was just interested to know if you think it's the amp chip. It can't be the transformer, because the tape motor still continues to work even after this happens.
I would suggest trying to see if the problem is still there with headphones plugged in.
quote:
Originally posted by BMoney:
I would suggest trying to see if the problem is still there with headphones plugged in.
Good idea, but I don't own any
LMAO!
How about a headphone to RCA cable?
Got one of those? You can plug one end into the headphone jack and the other end into the line-in on a working boombox.
So are you suggesting that if it can still play thru the headphone jack, it might be a bad amp because it just doesn't have enough power to power the main speakers anymore?
Sounds like possibly a bad capacitor. If you look around the boards look for any capacitors that are domed or look like they might be leaking. Could be a tough one to trace without an esr meter but it sounds possible that a cap could be losing power through the amp, just a thought.
Maybe a bad power switch or input selector. Check if there is a micro switch somewhere. Clean with lubricating contact spray.
quote:
Originally posted by muto:
Maybe a bad power switch or input selector. Check if there is a micro switch somewhere. Clean with lubricating contact spray.
All switches already checked & cleaned
Check voltages. Maybe there is a bad connection somewhere and voltage is dropping.
Bad capacitor's will cause your problem.
Yeh I think so too, just check google for "how to tell bad capacitors visually" or something similar.
good luck.
