Alpine MRP-M1000 no sound

shaunober · 23rd June 2011, 08:22 PM

Ok i bought this amp off amazon i bench tested it and it worked unhooked it and fired it up four days later and now there is no sound and sounds like im going to be stuck making payments on a dead amp. when i hooked it up the second time i noticed the blue light flickering and the subs were making a popping noise with nothing hooked up to it. If someone has a service manual on this can i get it? thanks for any help.

nigelwright7557 · 23rd June 2011, 11:11 PM

Check output MOSFETs first for shorts.

shaunober · 23rd June 2011, 11:19 PM

Pics of what I should test would be helpful

shaunober · 23rd June 2011, 11:56 PM

ok here is what i know. the amp must be shorting out somewhere when i try to do a bench test with the ATX power supply like i always do. once the amp turns on it makes the PSU power down. i am connecting with 12 volts 18 amps. If i connect it to a battery it stays on.

nigelwright7557 · 24th June 2011, 12:52 AM

You need to use a multimeter on the output transistors to see if any pins are shorted.

shaunober · 24th June 2011, 10:57 PM

This may be a dumb question but is it possible to fry the amp with a multimeter?

shaunober · 26th June 2011, 04:06 AM

i tested the amp again today on a battery the light stays solid and flickers when it does this it makes the subs pop. i did so testing with a multimeter and found that some transistors were going up to 20 volts at times.

christopher92 · 27th June 2011, 05:25 PM

Im having the same problem but the light isnt flickering and im pretty sure i fried a transistor the pins look burnt i was wondering if anyone knew where to get transistors for this amp

23rd June 2011, 08:22 PM	#1
shaunober diyAudio Member Join Date: Jun 2011	Alpine MRP-M1000 no sound Ok i bought this amp off amazon i bench tested it and it worked unhooked it and fired it up four days later and now there is no sound and sounds like im going to be stuck making payments on a dead amp. when i hooked it up the second time i noticed the blue light flickering and the subs were making a popping noise with nothing hooked up to it. If someone has a service manual on this can i get it? thanks for any help.

23rd June 2011, 11:11 PM	#2
nigelwright7557 diyAudio Member Join Date: Apr 2008 Location: Carlisle, England	Check output MOSFETs first for shorts. __________________ http://www.murtonpikesystems.co.uk PCBCAD40 pcb design software.

24th June 2011, 12:52 AM	#5
nigelwright7557 diyAudio Member Join Date: Apr 2008 Location: Carlisle, England	You need to use a multimeter on the output transistors to see if any pins are shorted. __________________ http://www.murtonpikesystems.co.uk PCBCAD40 pcb design software.

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23rd June 2011, 11:19 PM	#3
shaunober diyAudio Member Join Date: Jun 2011	Pics of what I should test would be helpful

23rd June 2011, 11:56 PM	#4
shaunober diyAudio Member Join Date: Jun 2011	ok here is what i know. the amp must be shorting out somewhere when i try to do a bench test with the ATX power supply like i always do. once the amp turns on it makes the PSU power down. i am connecting with 12 volts 18 amps. If i connect it to a battery it stays on.

24th June 2011, 10:57 PM	#6
shaunober diyAudio Member Join Date: Jun 2011	This may be a dumb question but is it possible to fry the amp with a multimeter?

26th June 2011, 04:06 AM	#7
shaunober diyAudio Member Join Date: Jun 2011	i tested the amp again today on a battery the light stays solid and flickers when it does this it makes the subs pop. i did so testing with a multimeter and found that some transistors were going up to 20 volts at times.

27th June 2011, 05:25 PM	#8
christopher92 diyAudio Member Join Date: Jun 2011	Im having the same problem but the light isnt flickering and im pretty sure i fried a transistor the pins look burnt i was wondering if anyone knew where to get transistors for this amp

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