The lights are always lit when the amp powers up but are normally green. I have it set all the way down, sorry forgot to mention that. worked good for 2 days and then the amp was in constant protection mode. I have a pioneer gm-5500t I checked all the wires and connections and made sure I had a clean ground. Not all amps have a protection mode indicator. Normally, both will be above 12v. If the voltage at BOTH the B+ and remote terminals is low and your vehicle's battery is not low (check the voltage at the battery with the multimeter), touch the black lead to a known good ground (a point scraped to the metal on the floor pan of the vehicle) and the red lead to the ground terminal of the amp. The one on the right is OK. B+ and Remote Voltage: If the amp is OK in this torn down state start reconnecting wires until you find what causes the problem. It's helpful to know how the amplifier behaves when working properly. Many amplifiers show protect when initially powered up (mute delay) and then switch to green. Phase Shift: Use this button to help compensate for time alignment problems. Sometimes it's a single LED that changes color (PPI). Auto Power-on: The auto power-on function is for high level (speaker level) connec-tions. Sometimes it will make it through a whole song without doing it, sometimes it stays in protect for the majority of a song. Yesterday for example, playing vinyl, amp shut off after 5 minutes. I've got a sony 4 channel amp. When I only connect the right speaker to the receiver, I can play at high volumes without the receiver going in protection mode. my amp was the same way. I have a head unit and a 5 channel amp running 2x 6.5" speakers, 2x 6x9" speakers and a 12" sub. Amp is still going into protect mode. The owner's manual is the best source to help you decode the blink sequence. If you read something less than 1v, the transformer is likely OK. My fuse running from the battery power wire blew today so I had it replaced. If that's the case, the amplifier will need to be repaired. If it doesn't go into protection with no speakers connected, I suspect that the speakers have ben damaged, especially if they're small. worked good for 2 days and then the amp was in constant protection mode. If the amp goes into protect with the RCA cables plugged in, go to step 4. You need to power up the amplifier and measure the voltage on the shields (shiny outer metal ring) of the RCA jacks. The amp started to go into protection as i was setting the gains,i thought maybe the amp was detecting clipping that i could not hear so i decided to turn the gains down a bit. I then did the reset and listened for 2 hours without shutting down. You … Please refer to the links below for basic starting information. If you're using a mono amp and have only one pair of speaker wires, you'll need to disconnect all but one speaker from the other end of the speaker wires. If the amp only goes into protect when one particular speaker is connected to the amp, you have a defective speaker. If you know how your amplifier behaves when the amp is in good working order, it will make troubleshooting much easier. There are a few amps (some JL Audio) that will go into protect and none of the indicators change. I have a pioneer gm-5500t I checked all the wires and connections and made sure I had a clean ground. For example, some of the Sony amplifiers have lights for power, overcurrent and thermal protection. This is sometimes difficult to check unless you know how the input circuitry of the amplifier is designed. Amp goes into protect mode when i hook up RCAs . power my subs will make popping noises and the amp goes into protect. THIS link takes you to a page where it's explained in detail. Hello, Here's my dilemma. The protection mechanism usually places the amplifier into protect mode when it detects a short, and during this time it prevents power to the amplifier circuitry, thereby preventing harm to the speakers and expensive amplifier components. Im going to open it today to see if it could be a simple fix, maybe a burned out cap, or resistor. New comments cannot be posted and votes cannot be cast. It's important that you leave your head unit on during testing so that the remote line will have voltage on it, the amplifier will be on, and the amplifier will be drawing current. Many times, the protection indicator will blink to indicate the reason the amp is in protect mode. Could my ground wire be an issue? then once this happens, i can hear strange screeching noises through my 12 subs(oh they are fosgate power hx2,dual 2 ohm.. I have checked the speaker wires in the back of the receiver and they are not touching each other or corroded. Amplifier Protection Mode Troubleshooting . I have a Pioneer GM-D8701 mono amp that's going into protect mode after about 10-15 minutes of low to medium volume play, ... aftermarket stereo amp and sub in my 1999 ford f150 so how can I run the wires without a wiring harness and how are the rca Jack's ran to a 4 channel amp? In most of the budget amplifiers, the shield will be directly connected to the NON-bridging speaker terminals. However, when I only connect the left speaker, the receiver goes in protection mode right away when a peak of high volume is sent out by the receiver. Touch the black meter probe to the ground terminal of the amp and the red meter probe to each of the RCA shields. Nothing works. heres my problem when i turn on my system it hits once then shuts off the power light comes on but then it hits and the power light goes off and the protection light comes on here is some other stuff that you might need to know to help me awnser my question i have 2 gauge power wire 4 gauge ground. If you have grounded your amplifier to a weak … I then figured out how to reset the amp. yep i would go with the ohm load being too low causing the amp to go protect when there's a fluctuation while playing at high levels, I had a T1000.1 that was only stable at 1ohm well I only had two choices with my subs 2ohm or 0.5 ohm well at 0.5 it would play until reaching 3/4 volume when it would go into protect. Generally, the power light is green or blue and the protect light is red but on some amps, the protect light is green and the power light is … I installed a new head unit, swapped RCA cables, made sure the connections are good, made sure my voltage was good, and tried different media sources; it's still going into protect mode. If you read more than 0.01v and the amp is at idle, you may have a bad ground. - Testing the voltage on the remote wire to make sure it is strong enough to turn the amp on - normal (14.4V) - Making sure that the power cables are … It takes 2 op-amps for each input. Thread Tools. If your unit goes into protection mode, it is a good and bad thing- good that further damage is being prevented, but bad in that it may delay the gig. You need to check the voltage on BOTH sides of each connector and fuse holder. Sub works fine when the left input cable is plugged in but as soon as I plug the right one it switches into protection mode. RCA leads are used to feed the amp with input signal from the car stereo. Try switching the right and left at the amp and see if the problem moves to the left input with it. and it was a bad ground at the amp. I installed my amp with the rockford 4 gauged amp kit. Generally, when there is a bad connection and the connection has been bad for an extended period of time, the insulating material around the connector will be melted. At every point where there is a green indicator, you should check the voltage. Then I upgraded to a 1000 watt amp, and it goes in protect mode only when I connect the RCA cables to it. Q&A, Advice, Tips, tricks and tech welcome! Some (like the old Autoteks) light the green LED and red LED initially then the red LED switches off. PROTECTOR as soon as I turn it on. If your amp has a “protect” light, and it’s on, then chances are good that you have a faulty speaker, subwoofer, cable or another component. 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