Question about Pioneer GM-5300T Car Audio Amplifier

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Power light kicks on then off when I turn on the stereo

I connected everything as per instructions and everytime I turn on the radio the amp doesn't kick on but only emits a blinking power light on and then immediatly shuts off. I've tried everything, doble checked the wires, what could it be???

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  • beaujameshar Jan 09, 2009

    same exact problem, except with 2 different models of pioneer amps...and i didnt have any problems till i got my new truck...

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  • 631 Answers

The amplifier likely has shorted output transistors. To confirm that it's not some other fault, go to the following page. It will guide you through the troubleshooting.

Troubleshooting - Amp Going into Protect

Let me know if you have any other questions.

Posted on Jul 22, 2008

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I have no sound coming from my sub or my back speakers. all the fuses are fine and all connections are fine as well and the blue light on my amp is on. and the it seem the power light and protection light...


With the radio OFF, take a jumper wire and connect from the 12V input to the remote input of the amp to see if it powers on.(BE CAREFUL NOT TO TOUCH THE GROUND). If it does, your remote from the radio is either cut somewhere, or not working at all. If it doesn't turn on then turn on the radio and do the same thing with the jumper wire, if it turns on, then your 12V power from battery is not working, maybe a blown fuse by the battery?

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My Alpine MRP-M650 Amp is acting up. When I start the car, if the volume is at low, the subs don't work. But when I turn up the volume, they eventually kick in, then I can lower the volume. But when...


There are a lot of things that could cause this issue ...
1. Your amp requires more power than it gets when you start your car, and needs to charge up before it can work. If this is the case, you should be able to give your stereo about 5 minutes to warm up at low volume and it should come on. This happens a lot with amps with built-in capacitors (capacitors give you stunning, instant kick when working, but require a bunch of power to initialize). If you wire a bypass switch for the power to your amp and bass components, you can turn it on separate from the rest of the car and allow it to charge before you start your car (just be careful to turn it off when you are going to be away from your car for a while since this will allow your system to drain your battery).
2. Your amp might be set incorrectly for handling the system you are running. If your Ohms do not match up exactly (8 ohm speakers with a 4 ohm amp -- it's the "Impedance rating") then the system should not work at all, or should burn out the amp ... but with a jury-rigged system it can work. If this is the case, I recommend getting a new amp that matches your speakers.
3. Depending on the amp, there might be a volume-based cutoff that is working improperly. Turn on the car with the stereo at low volume. While the speakers are still not working, check to make sure that the amp has power, and seems to be functioning correctly. If everything seems like it's on the up and up, but the speakers are not working, try changing the volume-filter options on your amp.
4. I put this last because it seems like you know what you are doing with the system setup, but it is possible that you have a bad connection between the speakers and the amp, or between the stereo and the amp. There could be a loose connection somewhere (either inside the amp, between the amp and the speakers at the jack, or between the stereo and the amp at the jack). If this were the case, everything would look perfect from a visual inspection, but there could be a tiny space, or corrosion in a connection. Turning the stereo up to a high volume could then bridge this short circuit, and the electric force could magnetize the connection shut, allowing you to then turn the stereo down with the working connection. The best-case scenario here would be an external wiring issue, where you can clean any corrosion off the connections with an eraser, and reconnect everything tightly fixing the problem. The worst case would be a short WITHIN the amp, which would have to be repaired by someone with a lot of time and a circuit tester -- in which case you might be better off trading the amp in for a new one.

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It would make sense that if your radio turns off, your amp will shut off too since its likely your amps remoae power signal is delivered via the light-blue wire from your radio.

so the question is, why is your radio shutting off.

Odds are your using an aftermarket radio and your ground wire is poorly connected.

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Hooking up amplifier to stock radio in Lexus ls400 1991


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Thumping speakers - no power light is on - wired correctly


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Amp Power light will not go on. Protection light is lit- Thump sound in speakers


It probably has shorted output transistors. To eliminate other possible causes, read through the following page.

Amplifier in Protect Mode - Troubleshooting

Let me know if you have any other questions.

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1 Answer

Maystar cx475


Ok, I am assuming this is the 600 watt amplifier?

DISCONNECT YOUR BATTERY!!

Supplies needed:
- 8 Gauge power wire (long enough to run from your battery to the amp placement) WITH an inline fuse!!
- Depending on your stereo (if it has amp pre-outs or not) you will either need RCA cables (long enough to reach your amp from your stereo) OR a Line-Out converter AND RCA cables.
- The power lead that connects to your "REMOTE" line on your stereo (long enough to reach from amp to stereo - usually blue)
- A good ground wire ( long enough to reach a metal part of your car from the amp)

======================================================================
STEP 1: Find a spot to run the power wire from your battery - through your firewall and into your car - and then to your amp. (DO NOT CONNECT IT TO ANYTHING YET)
STEP 2: Remove your car stereo and look to see if you have PRE-AMP outs (RCA connectors for an amp on the rear of the unit)
A- if you do, GREAT.. proceed to step 3
B- if you don't.. you will need to get a LINE-OUT CONVERTER - what this does is converts the higher signals from your standard wires on your radio, to RCA style wires to connect to your amp.
B2- you will also want to buy a wiring harness kit for your stereo, unless you want to hack away at your factory wires.. (not recommended) - connect the harness kit to your factory wire harness, wire in your leads for the output converter, and run the other end to your stereo.*
*you will need to know which wires run to the speakers you plan to power with the amplifier
B3 - once the converter is properly connected - proceed to step 3
STEP 3: Plug the RCA cables into the stereo or converter, and run them properly from behind your radio to the amp but DO NOT CONNECT THEM YET.
STEP 4: Connect the REMOTE wire from your stereo to the same wire for your amp . (this enables the amp to turn on/off with your radio.. otherwise.. you will have alot of dead batteries)
STEP 5: re-install your stereo into the car.
STEP 6: Connect the RCA speakers into the INPUTS on your amp
STEP 7: Connect the REMOTE wire to your amp.
STEP 8: Connect the speaker wire from the OUTPUTS on your amp to the speakers you wish to power
STEP 9: Connect the POWER CABLE to the amp PROPERLY
STEP 10: Connect the GROUND CABLE to a metal part of your car (sheet metal, not just a bolt)
STEP 11: Connect the POWER CABLE to the battery cable
STEP 12: Re-connect your Battery
STEP 13: Start your car, and test your radio.

If you have any issues from here.. you need to re-check all of your connections.

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2 Answers

Amp protection


Hi, Off hand, I believe there is nothing wrong with the setup, maybe just not 100% compatible. It's just that the Sony Amp's protection is doing its job (just too good) and the stock radio is likewise doing it's job (but not too good). Just maybe, at poweron, the stock radio sends out a small burst output (maybe capacitor discharge) that we normally hear as a slight thump in the speakers which was when no Sony amp, ok. However, when you have added the amp, you also amplified the thump, which unfortunately the Sony protection reacts to. You can off course let it be since you have figured out a way to make it work or you can try and install a delay on for the power amp or separate it's power on from the stock stereo. The idea is to turn on the stereo with the Sony off and after a second or less, a manual switch or a delay activated switch will turn on the Sony. The idea is to switch on the Sony after the thump has finished. Good luck and hopes this gives you an idea. Pls post back how things turn up. Kind regards.

Aug 15, 2007 | Sony XM-2002GTR Car Audio Amplifier

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