Question about Visonik V2508 2-Channel Amplifier

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I can't seem to get out of protect mode. Any suggestions

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Hi disconnect everything, inputs speakers and leave power. If still in protect mode then there is a circuit problem, will have to send it in.

Best of luck

Posted on Jul 15, 2009


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Stuck in protect mode

Protet mode is a special diagnostic mode that starts when a fault is detected.

When in protection mode the unit is prevented from starting by protection circuit, so to prevent further damage.

Check the speakers and speakers wiring, a contact in speaker wires, or faulty speakers can send the unit in protection.

Try unplugging power cable for one hour or so. then connect cable back and see if you get rid of protect state. Sometimes accumulation of electrostatic charges inside circuit capacitors can kick in protect mode. In that case unplugging the unit from main for some times can get rid of electrostatic charges, and reset circuits by draining power completely.
If that was the problem, you will not get Protect when plugging back power cable.

If you do all the above and still get Protect, then there is a real fault.

In that case the unit may be disassembled and tested to find the fault.

If that is the case I suggest contacting the manufacturer at the number listed on the owners manual, or asking a quote on repair to a local technician.

May 04, 2009 | Sony STR-D1015

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It seems the amps went into protect mode?

is any wires touching like in the speaker or @ the speaker or amp

Nov 16, 2008 | Phoenix Gold Car Audio & Video

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Nad C370

Since the problem seems to be sensitive to the volume level, I would be looking at the output wave form for any DC current. Although the protection circuit should detect any DC present, it is possible that some is leaking through. Also, verify that the speaker impedence is correct. If the amp is seeing too low an impedence load, it will work too hard causing excessive heat which will shutdown the unit as well.

Keep me posted.

Nov 04, 2008 | NAD C370 2-Channel Amplifier

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Protect Mode

There are bad connections on the main board that are effected by heat. I would suspect that when the volume level is higher, the system shuts down sooner. This should be a simple repair that will not require parts. If you can solder, you should be able to repair this yourself. If not, the cost will be the local labor rate.


Jul 21, 2008 | Sony STR-DE345 Receiver

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