Question about AudioBahn A2300HCT Car Audio Amplifier

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Transistor where do i go to get a transistor fixed any idea?

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You buy replacements, you don't repair them. What are the numbers on the transistor?

Posted on Apr 05, 2008

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1 Answer

Musical fidelity amp x-a2, one channel intermittent crackling / fading out, any ideas?! Tried swapping source and speakers... Many thanks -chris


hi,
This problem will occur when any one of the driver transistor is become faulty. You have to replace all the driver transistor of the same channel which make cracking sound . It is very difficult to tell which one is faulty. Because if you check the transistors with multimeter it will be ok. Replace all the driver transistor in that channel with same part number marked on it. The driver transistors will look like this,

ajin_g_6.jpg ok

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stop turning it on, until you change the transistors. you will burn the entire system.

change all the transistor, not only the smoking ones.
check all other components.

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yes you shorted the output transistors and replacing them will fix your issue. inside the amp you will find three legged transistors that mount to the amps body/heat sink. replace all of them.

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Burnt transistor with letters and numbers first row (IRFZ44N) second row (I R 544M) third row (03 65)


dude irfz44n is the transistor number... it is quite a common transistor... ask for it in the nearby electronics shop and fix the problem...

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What are the part numbers on the transistors you replaced?

Did you replace transistors in the output section and the power supply section?

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Shorted output transistors are the most common reason for amplifiers to go into protect. How much do you know about electronics/electronic components?

If you're a newbie, read THIS page.

Would it be possible to send me a set of high quality photos of the amp's internals?

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Mta 1501d


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?

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if you have some idea about installation procedure it wont be a big deal to fix it by yourself

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