Question about Earthquake Sound PH-D2 Car Audio Amplifier

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Earthquake ph-d2 is the amp i bought off of ebay ....i dont know the numbers for the pulse width modulator or the protection chip does anyone????

Posted by the_xtream on

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  • the_xtream Nov 05, 2007

    there are 3 parts that have the numbers scratched off one is the pwm you gave me that number and i have replaced the mosfets and the pwm still gets hot and goes into protect i have tested everything i can think of and started replacing diodes still doing the same the only thing i can think of is the other two parts with the numbers scratched off what do you think and whould you have the numbers to those

  • the_xtream Nov 05, 2007

    this is my board

  • jcaudana Dec 10, 2008

    i nedd the small piece, please someone help me... thanks

  • shaffina khan
    shaffina khan Jan 08, 2014

    can u tell me what are the output transistors number?

  • shaffina khan
    shaffina khan Jan 08, 2014

    power rail transistor

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Anonymous

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The PWM IC is an SG3525. Which IC are you calling the protection IC?

Posted on Nov 03, 2007

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  • Contributor
  • 39 Answers

The protection chip 8 pin I think is only a LM358.
You need to check the waveform on the gate of the power supply fets, sounds like this could be a problem. Make sure the gate has a nice square wave.

Posted on Jul 24, 2009

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Hello luistecnico2,

Those cross-reference OK. Go to www.mouser.com and do a search on both numbers. You'll find that one of them was manufactured by STMicroelectronics and is currently obsolete. The other is manufactured by Fairchild Semiconductor and is available at a cheaper price than the original.

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Earthquake ph 2d amplifier... there are 3 parts that have the numbers scratched off one is the pwm you gave me that number and i have replaced the mosfets and the pwm still gets hot and goes into protect i...


hello their the best way to fix this amp is to send it in for factory service !
the scatched parts are kinda a company secret . thust me ..
it will take more money trying to fixing it your self..

Jan 21, 2009 | Earthquake Sound PH-D2 Car Audio Amplifier

2 Answers

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Nov 02, 2007 | Earthquake Sound PH-D2 Car Audio Amplifier

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Check speaker load. You might try starting with a 4ohm load per channel. Only one speaker per channel and DON'T bridge. If it now works OK then you are on the trail of the right answer. Good luck. If it is a speaker load problem, then you need to correct this at once before you fry your amp. Good luck.

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