Question about MTX Thunder 1501D Car Audio Amplifier

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Mta 1501d my mtx1501d put out dc at the speakers i replace the caps and transistors but still has the same problem. I opened the amp and tested the resistors at 245,246,247,249 and get a straight beep on the tester and the other gives me a clear reading. any ideas on what happen, can some test thoses resistors and tell me if the should be a reading or a straight beep on the continuity tester. i call mtx and they dont fix that model any more the guy told me its a 4.75 1/10 watts at 1% R245,246,247,249.So can ayone help; me with this.

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You need to switch your meter to ohms and measure the resistance across them. You should read something near 4.75 ohms.

4.75 ohms would cause a constant tone on diode check or continuity.

Did you replace all 8 output transistors?

If not, are you sure that the other 4 transistors haven't failed?

Posted on Apr 17, 2008

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To get the clamps off click HERE.

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Let me know what you find.

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