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Tip for Home Theater Systems
Receiver say's "Protect" or turns on then off
posted on Dec 13, 2009
MessageRate.ThreadID = 3632423;
MessageRate.ProductID = 0;
smarthome2
Rank: Guru
Rating: 88%, 496 votes
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.
