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Old 28th March 2010, 06:33 PM   #1
raven is offline raven  Canada
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Default popping sound marantz sr4001

i have marantz sr4001 av receiver, every time i turn the volume up or down there is kind of cracking sound on the speakers and if i turned it up to the max it shuts down with protect message. i thought it was speaker connection so i remove all speaker wires and plugged an earphone and its doing the same cracking sound thing on the earphone. It's working fine by the way if i'm only using tuner/ radio. i opened the receiver to look for any obvious burn or something and i dont find any so far. I have a service manual for this, but i dont know where to start. any help would be appreciated.

txs
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Old 28th March 2010, 06:38 PM   #2
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This is often a static build up on the volume pot. Get some antistatic spray and ask someone how to best use it. Strange that it doesn't happen on the radio though...
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Old 28th March 2010, 07:11 PM   #3
raven is offline raven  Canada
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hi thanks for reply
this does this even when i'm turning volume through remote control,(volume knob on receiver is steady).And i quess i should had mentioned the circumstances leading to this problem: i had my ipod connected to aux input 1 ( i had this set up for about a year), and last week about half an hour of listening, i heard a series of popping sounds and my receiver shutdown with that red small led flashing near power button. since then this problem came.

Last edited by raven; 28th March 2010 at 07:23 PM.
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Old 28th March 2010, 07:24 PM   #4
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ok, then we'll have to leave it to those who know more. I wonder if you have some caps going bad?
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Old 30th March 2010, 06:14 PM   #5
raven is offline raven  Canada
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i tried to look for some bad capacitors and they all seem to look fine, no burnt parts either. And just an update, it also does popping sound when i change the input selection, like from dvd to cd to tape and also when i'm changing settings like from dts to dolby to stereo, turning off equalizer and surround mode.Also i just notice that there is also popping when i'm using tuner its just not too loud compared to other inouts. So basically whenever i change setting i have this popping sound, also the pop come in conjuction with every volume digit i change and goes loud as volume is turned up and it is coming from all speakers.
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