Have a mtx ta92001, different from other one I had. Any how. The smd capacitors by the subwoofer output terminals was burnt. I've replaced replace them. Amplifier power up, but once i play any kind of music. It's plays for a few secs then but the power draw shoots up to 13 amps. And the subwoofer thumps ever 2 seconds. I've disconnected the rca. With no rca connected, I have a 8 ohms load subwoofer connected the amplifier swings back and forth between 13 amps and 8 amps power draw and every 2 seconds and the sub thumps in and out with the amp swing. Any idea where I should check? Also the power supply get section is very hot. 107f the power inductors are 150f. The out put suction is 96f
You'll have to drill it out until you get to where there is clean (white) fiberglass.
You can use a bit/burr smaller than the hole to just cut away the parts where there is carbonized fiberglass.
You can use a bit/burr smaller than the hole to just cut away the parts where there is carbonized fiberglass.
Hopefully, you won't need to tale much off. Clean it up with solvent before you start. Clean after you think you've gone far enough but give the solvent (preferably acetone) time to evaporate before you apply power. If you use a little heat, that will accelerate drying.
Have everything clean up. Power the amplifier up using a 10 amp power supply limiting current to 15amps. Everything working prefect. Went to hook it to a car battery. Made a big mistake. Have the power reversed. when I touch the ground to the positive for a split-second, good part I didn't try to force or hold the power luckily. Connected it the correct way amplifier plays. But the top of the amplifier is flashing now as if it's getting a signal. it's a constant flashing with the fans on the inside of the amp I disconnected the fans to see if the flashing would stop, which it does. I plug in each fan separately to see if maybe one the fans are bad it only does it if all three fans are connected and spinning at low speeds . Ones the amplifier warms up round 110 degrees Fahrenheit or higher the fans pick up speed the flashing effect on the top goes away. music plays great. Also is it common these amplifer for the power supply section to be so hot even at idling.? So are the power inductors there hot
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Is the 5v regulator voltage steady when the LEDs and fans are flashing?
The output inductors run hot.
Are the PS FETs heating up?
The output inductors run hot.
Are the PS FETs heating up?
PS run warm to the touch. When I check it with a laser thermometer shows 100 degrees Fahrenheit across the whole heatsink. the power supply fets I can touch them just fine they don't feel hot just warm to the touch.where is the 5v regulator?
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Yes it's extremely light. Almost couldn't tell that the subwoofer was even pulsing. When I try to read it with a multimeter shows only between 76 millivolts down to 64 millivolts
The fans are driven by either/or the speaker level or the temperature. The pulsing may be causing the flashing and fan problem.
Is there another light setting that uses a programmed drive instead of the speaker level?
Is there another light setting that uses a programmed drive instead of the speaker level?
There a switch to turn off the light effects. I did notice I had the gain cranked up all the way up. I've turned it down to half way the pulsing lights and fans has stopped I think it was picking up interference from my power supply. Xs power intellinsupply. It's a ac-dc power supply. I change the color too. Gus's green is finicky
Ok just installed it back into the car. The original pulsing is back. the subwoofer is pulsing every 3 seconds. Only does it when the engine running or when my power supply is connected
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The op-amp near the RCAs may have been damaged.
Confirm that the ±supply pins have proper voltage.
Confirm that the ±supply pins have proper voltage.