LIghtning Audio B300.4 Protect Light

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Lots of help in the links

Amp goes into protection mode - Polk Audio Forum

https://forum.polkaudio.com > discussion > amp-goes-i...
Nov 26, 2018 - As the title says , my 4 channel amp goes into protection mode when I turn my volume up to about 18-20 , causing a loss of sound .
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Protection Light ' Polk Audio PA660.4 Support - HelpOwl.com

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  What To Do If The Pertection Light Stays On ' Polk Audio ...

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Car amplifier(Polk Audio PA660) question - Badcaps Forums

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Dec 19, 2013 - The amp, is a Polk Audio PA660. It was entering in protection mode. I have found a pair of final transistors shorted at one of the ...

Amplifier Protection Mode Troubleshooting - Car Audio Help

http://www.caraudiohelp.com > newsletter > amp_prote...
One of the more confusing car stereo problems can be when an amplifier goes into protection mode. One minute it's working and the next minute it's not, ...

Common Causes of Lightning Strikes

• Outdoor network cables or power cables are routed overhead.
• A switch is deployed outdoors but is not properly grounded.

Damages of Lightning Strikes

• If power cables of a switch are routed overhead in an outdoor environment, lightning strikes may burn the power supplies.
• If network cables of a switch are routed overhead in an outdoor environment, lightning strikes may burn interfaces of the switch.

When a switch undergoes lightning strikes, overvoltage is induced by lightning on network cables and transmitted to interior of the chassis. The surge protection measures, such as lightning rod and chassis grounding cannot prevent the damage. Therefore, surge protectors or surge protection circuits are recommended.

Surge Protector Use Precautions Take the following precautions to protect a switch from lightning:

• Ensure that the ground cable is connected to a ground bar or a ground point on the cabinet.
• Avoid routing cables overhead in an outdoor environment. Bury cables underground or route them in steel tubes.
• To protect network interfaces against lightning, use 8-line surge protectors (or Huawei certified 4-line surge protectors).
• When installing a network interface surge protector, connect the IN end to terminals and the OUT end to network interfaces of the switch.

If a fixed switch is installed in a network box, follow these instructions:

• Connect the ground cables of the switch and surge protectors to the ground bar in the network box.
• The maximum length of a ground cable cannot exceed 40 cm, and a length of smaller than 15 cm is recommended.
• If the network box is located outdoors and power cables are routed aerially over a long distance (more than 300 m) to the network box, it is recommended that you install a power supply surge protector in the network box. The decoupled power cable must be at least 3 m long

S2300 Switch Thunder link com

• Only a select few things can cause protect mode with the battery only connected.
• An installation issue. Check the Power, Ground and Remote wires. Make sure non are shorting from one terminal to the other.
• It is still overheated and has not had time to cool down from being in thermal protect mode.
• The amp itself is touching metal. You always want something non conductive between the amp and where it is mounted, this includes the screws being used to anchor the amp. They should never touch the metal in the car either.
• The final thing that can cause an amp to go into protect mode while only hooked to the battery is the amp itself is malfunctioning and or defective. You can try opening the amp and look for any black spots on the circuit board where an electrical component might have smoked up or blown and replace that part.

Regards, Tony

How do I reset my amp / receiver from protect mode ?

the amp probably got to hot and had a thermal shut down witch will have to be fixed by a professional.

In protection mode do you mean the light comes on and it plays music and stuff? If that's the case, that's what the amp is supposed to do. Protect itself from a power surge

the amp will need to be repair because it has a fault that it is seeing internally. so not much you can do other than buy a new amp or get that one repair. probably cost effective to buy new. hope this help. good luck

The most likely reason for it to go into protect is shorted output transistors.

Disconnect all speaker wires and signal cables from the amp. If it powers up (no protect light), the wiring needs to be checked. If it still shuts down (goes into protect), the amp likely has blown output transistors.