Question about JVC MX-D402T Shelf System

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Can't control volume on JVC MX-D402 system

Volume blares when you adjust volume with the volume knob on JVC MX-D402 system. The only way to control volume is with remote. Any suggestions?

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  • christmas113 Feb 20, 2009

    I'll check that out. The knob seems tight on the shaft so I'm not sure. Thanks

  • haveric May 23, 2009

    My volume control is also erratic. It is not loose, either. Has anyone contacted JVC?

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  • 77 Answers

The control knob in shelf stereos from frequent use wear out quickly. contact the manufacture and see if it would be an adventagious avenue to replace the volume control. if not to spendy.

Ryan
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Posted on Feb 19, 2009

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1 Answer

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syntoms include: no power on or off , no sound or volume control of any kind

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the volume control needs to be cleaned. this control is a step switch basicly. and the switch contacts are not making proper contact. cleaning this requires dis-assembly and desoldering so if you are inclined to do this work happy fixing if not it shouldn't cost much to fix.

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1 Answer

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Hi,
This sounds like a case of a dirty/defective rotary encoder. The volume control used here is not the conventional potentiometer type , but a rotary set of switches that tell the sytem if the knob is being turned left ot right.
Do you think you'd be able to open the unit and spray some contact cleaner into the rotary encoder? It might involve dis-assembling it down to front bezel removal.
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