Fender Stage 100? Need Help Quick...

[bud92]

I have a Fender Stage 100 and for about two weeks everytime i cut it on it hums continuously, and its pretty loud. It seems to be coming from the speaker but i'm not completely sure. I've tried it in different outlets, different rooms, different cables, different cords, i've tried everything and i cant get it to go away. I dont know very much about amp electronics, and i'm broke so if i can avoid taking it in, that would be best. If anybody has any idea what it could be i would really appreciate it. thanks.

[drewl]

What does "cut it on" mean?
Okay, it hums....does it hum with nothing plugged into it?
Does it have a 3 prong cord?
Is it a tube amp?
Are any of the tubes glowing bright red?
Does it have fx send and return jacks, or power amp preamp jacks?
plug a cord into them to see if the hum is coming from the preamp or the power amp.

[Mark Black]

That is a solid-state amp (no tubes).

Previous experience leads me to immediately suspect a cracked solder at one (or both) of the main filter capacitors. Also based on previous experience if a guy goes to the trouble of removing the PCB to get at the solder side it's the perfect time to retouch not only the filter cap solders but also all at controls, jacks, switches, LED's, power transistors, large and/or heat-producing components, and at any other point which looks "solder-starved".

Fender did not do a stellar job soldering these amps at the factory, and I have also found instances where solder did not truly wick onto the solder pad part of the trace due to contaminants - revealed during a re-touch when the solder just balls up around the component lead and doesn't flow onto the pad.

Good luck!

[Twist]

Mark is putting you on the right track. Also you stated your not sure if it's coming from the speaker or not. If you hear a hum inside the chassis it could be the bolts that secure the power tranny are loose or gone. This allows the power tranny to vibrate.

[F100390]

I had the same problem with my amp, it was the main capacitor connections, they needed to be re-soldered. I've fixed my amp multiple times by re-soldering the connection. I kind of had the same problem again today, tried fixing it again like I usually do, but of course, now the fuse keeps blowing and it just isnt working.............. so I'm stumped on it, though I did buy new capacitors............ who knows...........

[52 Bill]

It could be bad filter caps, but it sounds more like shorted output transistors. Try staring a new thread, describing your symptoms and model number , etc.

Edit:
I found your new thread. Never mind.