The most common problem found on
FixYa for
Audio Video
Receiver's is:
My receiver say's "Protect" or turns on then off.
What's wrong? Seven times out of ten it is a shorted speaker or
speaker wire.
To determine your exact problem, the first step is to disconnect all
speaker wires "at your receiver" Next: Turn the receiver back on. If
your receiver still says "protect" or turns off, it needs to be
serviced. If your receiver stays on; reconnect your speakers one at a
time and power back up after each speaker. You may find that after
reconnecting all speaker wires it works! Most commonly the small braids
of wire from the + to the - have touched and have caused the problem. In
some instances, you noticed the problem only when turning the volume
up. either way, make sure the exposed wires to your receiver are no
longer than 1/2" long and are
completely under the screw
down terminal or slide in. When you've found the wire or speaker with
the problem, your receiver will go back into "protect" At this point,
disconnect the wire from the speaker at the speaker that may be causing
the problem then test again.* Note* Make sure speaker wires do Not touch
each other as this Will cause a short! If you turn the receiver back on
and it stays on, you now know the problem is in your speaker itself. To
test your speaker, you will need a multimeter. Set it to ohms
resistance and touch the speaker terminals, if there is a short
internally the meter will read "1......" If it's an analog meter, it
will peg to the right. There's your problem. Now, within any speaker
there are quite a few possibilities as to what could be causing the
problem. Most common is a blown coil and the speaker needs to be
replaced. Some speakers have internal crossovers (usually
floor standing speakers)
and may have a shorted or burnt board (usually very visible brown burn
marks on the board) and can possibly be repaired if your handy with a
soldering iron. Now, if you disconnect the speaker wire at the speaker
and it still says "protect" Check your wire for the obvious cut or nail
thru
the wire if possible. If your system has wiring that runs behind walls,
you may need to use your meter again. Disconnect the wire at both ends,
keep the ends separated, put your meter on ohms resistance and touch
probes to the + and - wires at one side. If the meter pegs to the right
or reads "1...." the wire is shorted and needs to be replaced or
repaired at the short. Hope this helps.