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Old 4th February 2011, 13:57   #1
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Default GMX-944 Amp Issue

Hi,

I have a Pioneer GMX-944 Amp installed in my SX4. I have been using this amp for quite some years. Yesterday one of the channel on my amp started playing a bit weird. By weird I mean the sound keeps flickering and goes blank and at times it gives a balrring sound. Not sure what this is ?

Can anyone tell me what might be the possible issue ? (Assuming you guys might have come across this issue)

Thanks
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Old 4th February 2011, 15:08   #2
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Default Re: GMX-944 Amp Issue

Take the amp to a Pioneer service center, or a competent electronics technician. This is due to either a solder joint gone/going loose, or a component (probably a capacitor or a potentiometer) saying final prayers.
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Old 4th February 2011, 15:28   #3
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Default Re: GMX-944 Amp Issue

Thanks DerAlte for your quick response.

Found a technician in Mumbai. Said He is gonna take a look at it. His intial diagnosis was also the Soldering going loose. I have dropped the amp with him. He is gonna get back to me by tomorrow. Have my fingers crossed.
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Old 4th February 2011, 16:56   #4
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Default Re: GMX-944 Amp Issue

Hi Abhijith,

It's a known issue with Pioneer 944s; I had one myself, which suffered from the same problem after 6 years of use. The capacitor had gone bad. I don't know whether it was repaired or replaced, but Bharat Auto charged me 600 bucks for the same. However, note that after a while the problem resurfaced in another channel. So maybe, it's a good idea to have all of them checked up while it's at your mechanics.
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Old 4th February 2011, 17:25   #5
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Default Re: GMX-944 Amp Issue

Hey abhijith,

I also use the same GMX-944 amp in my tiny its 8.5years old.

I had two issues with the amp
1. Solder going dry which got sorted but resurfaced again.
2.Mosffets went bust on the front channel so decided to replace all this sorted out my 1st issue too.

The total repair cost was 1200rs Got it repaired from my installer FM drive in santacruz.
PM me if you need the contact details for the same.

Its better to replace the mosffets and have peace of mind for a long time, and after the new mosffets the output has become good and even more clean.
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Old 5th February 2011, 17:59   #6
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Default Re: GMX-944 Amp Issue

It was the Solder going dry. Got i re-soldered. Its working fine now. I have also been facing some issues around my equalizer. I will post a new thread for that.

Thank you Ol Man,GTO and Jatin.
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