Question about MTX Thunder 4250D Car Audio Amplifier

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Can not find replacement resistor number 75339p

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  • Roberta Smith
    Roberta Smith May 11, 2010

    do you know the value of the resister ?

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  • 113 Answers

Different companies use different numbers so you should try to cross reference with other resistors you could probably call an electronics company and have them look it up for you

Posted on Jul 05, 2009

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There are 12 resistors all of them are 6.8 ohm 1watt resistors they are located in front of the ICs heat sinks at board location numbers 3149 -3160 they will all be identical and are grouped in sets of two side by side.

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It isn't the switch it needs a new blower resistor and new fan motor.
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I need 2 chips for an mtx roadthunder 4250d amp the number on the chips are 75339p then there is a y1 and a 44 if u could tell me were i can get them it would be apreciated both chips are the same


HUF75339P3-ND

THE ABOVE LINK WILL TAKE YOU TO THE DIGIKEY PAGE THAT HAS YOUR MOSFETS YOU ARE LOOKING FOR IN THIS AMPLIFIER. LET ME KNOW IF YOU NEED FURTHER ASSISTANCE....V

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1 Answer

The number 2,3,4 selection on the airconditioning fan doesn't work but 1 and 5 do on my 2005 Chevy Tahoe. Can you help?


Technical Service Bulletin TBS
05-01-38-012B
Your Blow Motor Resistor Is the problem
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Call dealership and you can get the part give them the TSB Number

Should take about 30minute to replace not to hard.

Let me Know

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if the outputs are mosfets instead of bipolar transistors, it is a mosfet amp.
some designs are using mosfets to drive the switch mode power supply,but use bipolar output transistors.that is not a true mosfet amp.
you need to go to an electronic supplier for the repair industry.
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