Question about Crown CE1000 2-Channel Amplifier

2 Answers

The left channel of the amp is buzzing loudly and the volume control does not turn the channel off. When I put it in the zero position a signal is still routed to the channel. I've replaced all the cables and verified that the mixer is good.

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  • vrin_122812 Jun 22, 2011

    Already tried that, like I said cables are good, connections are good.

  • vrin_122812 Jun 22, 2011

    OK, but what about the signal? When I play something through the amp and I turn the volume control all the way down I still get sound through the speakers. There shouldn't be any sound at all if the volume knob is completely off.

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  • Master
  • 2,098 Answers

Hi,
This kind of symptoms indicated that there's faulty output transistor in the left channel because the buzzing sound can't be controlled by the volume control. Your unit used 16 pcs MJ21194 output power transistors or more if I'm not mistaken. You must pull-out this transistors together with the heat sink and compare the resistance reading to the good parts (right channel).
Let me know if you need further assistance.
Jdvillanueva

Posted on Jun 22, 2011

  • Jdvillanueva
    Jdvillanueva Jun 22, 2011

    Lets isolate the fault from the volume control itself, faulty volume control will do the same symptoms, first if you have a electrical contact cleaner, spray it directly to the volume control while turning it on and off to clean the contact. Repeat it as much as possible. Try the unit, let me know if the symptoms still there...

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  • Master
  • 10,319 Answers

Make sure the olug in is very tight and the wiring has a solid connection. If not feedback of this sort is very common

Posted on Jun 22, 2011

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