Question about Car Audio & Video
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Posted on Jan 02, 2017
SOURCE: Protection Light irritation
If the amplifier goes into protect when there are no speaker wires connected to the amp, the amp is likely defective. The most likely culprit is shorted output transistors. If it's new, return it to the place of purchase for repair/replacement.
Posted on Jan 11, 2008
Have you tried using bigger gauged wires? If the amp can not pull enough power through the wire it can cause it to run into protected. This solved my problem running a 2000W amp on 12 gauge wire, went to 8 and it worked great.
Posted on Nov 14, 2008
SOURCE: Protection mode
It's normal for some amps to go into protect for a few seconds when initially powered up. If it remains in protect mode, it may have shorted output transistors. To eliminate other possible causes, read through the following troubleshooting page:
Amp in Protect Mode - Troubleshooting
Let me know if you have any other questions.
Posted on Dec 11, 2008
if the protect light stays on the amp is blown or has flawed components and is only repairable by expirenced sony tech
Posted on May 18, 2009
SOURCE: amp goes dirctly into protect
ok well it could be two thing wrong your amp dont have a good ground or your amp is a smar amp and your subs must have to be hooked up so the power from the amp cn go to the subs so the amp can see that you do have subs hooked up to take it out of protect o and look at your fuses to to smal or to big will send it to protect to
Posted on May 19, 2009
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Jan 23, 2012 | NAD M3 Master Series Integrated...
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.
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