Philips speaker protect - Sharp CD-BA2100 CD Shelf System

It has an audio input, a 3.5mm cable you can connect to the headphone or speaker jack on your computer. The USB likely won't work with a computer as it usually requires a particular file structure; something simple like you'd find on a flash drive, ipod, or some phones.

My system has been doing the same thing. I found that if you remove a speaker or two the try again it may work.but if not turn it on and as soon as you here it quickly turn it down,also you may have some crossed wires if so replace them and your system may not have anough output for your speakers.one more thing you might want to try is getting some thicker speaker wire. i hope this helps you and ide like to here how things turned out E MAIL [email protected]

It is possible that the amplifier had encountered a fault with a higher current drain which had triggered it to a protection fault condition. The fault can be with your output drivers. Please check for short on the outputs fitted for both the channels. Use a meter after disconnecting to check for short in the drivers. Disconnect the positive and negative voltages to the output and see if the protect changes. Even a fault in the preamp stages that drives in high current into the output can shut the Amplifier. Sometimes this can be a noise which can be a HUM or HISS before the protect works. Faulty capacitors in these circuits also can cause similar issues and needs close observation.You need to confirm and replace the specific stages or outputs. If not there can be issues in the mother board. Maybe the protect circuit by itself is shutting off due to a faulty bias or there is a leak in any voltage/current sensing circuit. Also disconnect the speakers and test, if the amplifier comes out of the protect mode then check for short on the speakers.

Check the speaker wires for shorts, if okay, suspect the audio output chips in the stereo, one or two are defective.

It is possible that the amplifier had encountered a fault with a higher current drain which had triggered it to a protection fault condition. The fault can be with your output drivers. Please check for short on the outputs fitted for both the channels. Use a meter after disconnecting to check for short in the drivers. Disconnect the positive and negative voltages to the output and see if the protect changes. Even a fault in the preamp stages that drives in high current into the output can shut the Amplifier. Sometimes this can be a noise which can be a HUM or HISS before the protect works. Faulty capacitors in these circuits also can cause similar issues and needs close observation.You need to confirm and replace the specific stages or outputs. If not there can be issues in the mother board. Maybe the protect circuit by itself is shutting off due to a faulty bias or there is a leak in any voltage/current sensing circuit. Also disconnect the speakers and test, if the amplifier comes out of the protect mode then check for short on the speakers.

Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it '*****'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Check for loose speaker connections at the speaker as another possible root cause for intermittent shutdown.

Maybe it's self-protecting.

Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Check for loose speaker connections at the speaker as a possible root cause for intermittent shutdown.

Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and
operator exuberance by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance
loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has
sufficient ventilation on all sides and that vent holes are not blocked by dust balls.
Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean
dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-
protection cycles in their lives so continuously resetting or cycling their power without
addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker
connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted.
If it does not come up the problem is internal and should be left to an experienced and
competent hands-on tech.

Check for loose speaker connections at the speaker as a root cause for intermittent
shutdown.

Generally speaking, an amp protects itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Well, if the headphones work,then the amp in the rcvr is working.
Make sure speakers are hooked up properly (Spr A, Spr B, etc.)
Be sure speakers are selected properly on the front panel.Look in the owners manual and see if its possible to reset the reciever.If this is an older unit, speaker relay may be dirty or defective or unit is in protection.If unit used to make a click after a few seconds when first turned on and now it doesn't, then the relay is not working.