Question about Audio Players & Recorders
The overload/thermal protection kicks in regularly, also at weak sound or low volume. It is an intermittent fault, gradually the periods of proper behaviour are reducing.
Posted by Anonymous on
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Posted on Jan 02, 2017
SOURCE: Sony amp str-db940 - protection
Somewhere in your speaker wiring, you have a shorted wire. This short can be as simple as a single strand of wire touching the other terminal on one of the speakers.
With a bright flashlight, look carefully at the back of the receiver and then the speakers for any loose strands.
Posted on May 27, 2008
Have you tried connecting speakers? What was the result?
Yes, when you turn the volume up on these amps (or when the output gets past a certain level) the cooling fan should automatically come on.
Posted on Oct 14, 2008
A couple of possibilities: Bad solder on power regulators (attached to main heat sink) or cooling fan may not be turning on when volume is raised.
Posted on Jan 16, 2009
SOURCE: VSX-D608 Overload and shutdown
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.
No more than two 4 Ohms speakers can be connected to the unit, or you will get overload.
If the speakers are OK, then preamp, shorted input/output connectors, main power supply or faulty output transistors can draw too much amps causing overloading.
In that case it is recommendable contacting Pioneer at the number listed on the owners manual.
Posted on Jun 22, 2009
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