Fender Frontman FM25R channel switching problem

[Jazz P Bass]

. Some models the speaker wires down into the cab can stop you short.

Yeah there is one I did not think of.
The speaker leads.
The speaker baffle will have to be removed if it is a sealed back cabinet.

[dpve1@aol.com]

Hey experts,

First I would like to say that I greatly appreciate your assistance
and patience.
Success!!
I was finally able get the chassis out by loosening the front grill
(its a metal one on this oldie) It was so tight up against the bottom
of the chassis, that little bit of wiggle room and working it out as you
recommended did the trick.

I replaced Q1 and bingo -- I now have both channels.

Lots of carpet in my room and I think static electricity
did it in to begin with . Need to discharge myself
before touching the amp and bring the humidity up.

Thanks again and
All the best ----

[Jazz P Bass]

Glad to hear that you repaired the amp.

[Enzo]

Nice theory, but I think that transistor is pretty well protected in there. It is within the metal chassis, and any static discharge will go to the chassis, having no real way to get at that transistor. If you charged up and staticked the tip of a guitar cord plugged in, you would likely zap the input device, rather than that transistor. In any circuit, the most vulnerable parts are those that connect to the outside world - usually at a jack.

I think you just had a random part failure.


However, static can be annoying even if not harmful. Try this, dilute some Downy fabric softener into a spray bottle, and spray some on your carpet. That will cut down static a lot, plus make the room smell April fresh. You probably could tape a couple dryer sheets to your shoes and scuff around the room, but that seems harder.

[dpve1@aol.com]

duh - i have a problem with a Fender Blues Junior but
can't seem to figure out how to start a new thread.
And I've done this before ---

[52 Bill]

From the index page of the forum that you want to post in, at the top left side of the list is a button, Start new thread or something like it.