The audio out to the speakers stopped. Is there a resetable fuse or CB in the unit?
This unit has no output to the speakers. The headphone output is ok. The owner said that there may be a circuit breaker for speaker/amp protection built in, which may be bad. He didn't say if he hooked too many speakers to the unit and possibly damaged the amp due to too low an impedence load on it. Is a schematic & parts list available for it somewhere? I didn't think cheepo units like this had any built in protective devices.
Re: The audio out to the speakers stopped. Is there a...
A good possibility is a bad solder joint on the circuit board likely to be close to the headphone jack. A circuit breaker is unlikely in this type of unit but if it had one it would likely affect the headphones too. I would look for a broken trace or cold solder joint near the headphone jack. The jack itself could also be bad.
Re: The audio out to the speakers stopped. Is there a...
Just to let people know,if anybody still needs to know-: it has been common practice in the a/v world (which includes boomboxes and other cass.players to include a swiched headphone jack.This is the reason your speakers switch off when you plug in h.p.'s. If it is really an av model it will have more than one headphone jack.If this is the case,you most likely must use the #1 jack in order for the others to work. Woody firstname.lastname@example.org
a 6ya Technician can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US. click here to Talk to a Technician (only for users in the US for now) and get all the help you need. Goodluck!
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
I'm assuming you mean he plugged an amp output (meant for a speaker) into the input of one of the Crown amps powering the sub-woofer. Right? Crown amps have good protection circuits and are high quality units. Some models have internal fuses but you didn't list a model here. If they are fused (or some kind of breaker) you should be able to see those by opening the top cover (amp off and unplugged). It is unclear if you tried to use the amp again after this incident.
Some Crown amps have protection circuits that will reset themselves after the fault is removed. In this case, you should remove both inputs and output (speaker) and power it up. If the amp doesn't light any protection lights or indicators, then turn it off and connect a known good speaker (not the subwoofer) and a source you can control. Set a low volume and see how it goes. You can really try either approach first depending on what's easier.
Overload is displayed when the amp draw is excessive, and can be caused by different faults. when Overload is detected, the protection circuit will shut down the unit to prevent further damage.
The first thing to try is hard reset. Shut down the unit for about one hour to drain power completely. This can fix minor problems that can cause overload, for example electrostatic charge accumulation on internal capacitors.
If that does not fix the problem, then you must find the fault.
Overload can be caused by shorted speakers, wrong impedance speakers, or by a contact on speakers wiring. Check speakers connection and test different speakers with 6, or better 8 Ohms impedance.
Another test can be done by unplugging all speakers, and reconnecting and testing them one at a time, at a very low volume.
the speakers are OK, then preamp, shorted input/output connectors, main
power supply or faulty output transistors can draw too much amps
In that case it is recommendable contacting Pioneer at the number listed on the owners manual.
The lit indication ("amp bars") proves that the aduio signal is getting through the unit's circuitry @ least to that point; lack of sound @ the spkr & headphones indicates the amplifier portion of the circuitry is either inoperative or disconnected from the load (i.e., either the speakers, or the headphones). A common cause of this type of problem cropping up unexpectedly is the headphone jack itself; in most products of this type, the audio path from the amplifier output to the speaker connection runs through the headphone jack, so the the speakers may be "turned off" when the headphones' plug is inserted into the jack. If the unit's owner uses headphones regularly, the most common problem to be found with the jack is loose solder connections to the printed circuit board's traces from the jacks' lead(s); in units with this problem whose owner's irregularly use the headphones, it's more common to find oxidization of the electrical contacts within the jack itself.
Hello, is this a Radio Shack PA amp or Jamo amp? The unit is probably in "Protect" mode. Is this a PA system or a receiver...receivers have a protection circuit that will not let the speaker relay activate if the amplifier output section is shorted and sending voltage towards the speakers...so they won't fry!!The speaker relay should activate within 3 to 5 seconds if your output section is ok.
Without looking at the schematics for this particular model, I'd surmise that the click is indeed a speaker protection relay. Generally this is fed by a number of different sense circuits that watch for power amp issues and/or excess speaker current and/or power supply output stability. Although the relays do indeed fail at times, generally it is not the relay that is at fault. If you have a scope and a schematic, you can check the various circuits that feed the relay for the exact cause. If not, you can do some experiments that might help deduce the problem: e.g. do headphones work when speakers do not, does the relay click on when no speakers are connected (or selected), etc. In my experience, it is most often the output transistor(s) in the power amp. But not always ;-)
Make shure your speaker wiring is solid hookup to amp and spekers (NO CROSSED WIRING). Also make shure speakers are not wired in parallel or the speaker impeadance will be to low and amp will kick out.Turn speakers off then hook up headphones and crank up volume then see if amp kicks out.If it does you have an internal overload and needs serviced. If it playes ok then you must have speaker problems or wiring.
check your spekaer cabling first for any loose connection. if everything as usual then something is wrong with either your speaker system or the power output stage of your amp. you may call it a "circuit breaker" but it actually overload protection of the power amp so as not to damage speakers or amplifiers. have your speakers checked for burn coils. you can also try to remove or turn off speaker switch, turn on the power, level up the volume and see it the system still stays on and does not trip (as you called circuit breaker) if the unit remains on, then it must be your speakers. though it could also be a leakage in the power transistors of your output stage, it something a technical person have to do to check anyway.
If your amp is under warranty, bring it to the nearest service center to have it fixed. But if not, and you know a little electronics, check for the bloated capacitor and/or a burnt resistor on the audio module and replace it. still not working, change the audio I.C. of the amp. If you don't know electronics, bring it to the electronics shop. Audio coming out of the headphone is different form the audio of the speakers. Sounds on your headphone is coming from the preamp circuit. That explains why the headphone audio is ok.
Here you can get the owners manual for the unit if you need it;
For the protect mode to kick in only for some input sources, then there would have to be a fault in one or more of the pre-amp circuits - there will be a separate one for the radio tuner.
Probably the solution for such a good unit is to contact the manufacturers and see what they have to say - probably they will suggest you send it in for service and i suspect they would be right - here are the contact details if you happen to be in the US;
or through this link if not;
Hope this helps and you get an answer from them - it is probably fixable relatively easily and shouldn't be expensive for parts :)
It sounds like there is a problem with the differential circuit. The bias I am not sure about, as every unit is different. You should get the service manual to be sure or call Denon and see if they can give you an idea. Good Luck