Crown MT1200 turn on click on channel 2?

Creative1 · 10th December 2010, 12:57 AM

I'm trying to diagnose a turn on click that seems to only occur on Channel 2 on a Crown Microtech 1200. Happens about 1-1.5 seconds after turn on - and before any audio output occurs.

Channel 1 never seems to do it.

I diagnosed why channel 1 wasn't working (ODEP off and 84v to speakers) - and it was multiple shorted outputs.. Other than replacing the shorted outputs, any other "preventative maintenance" or other overhaul I should consider?

Just wasn't sure where to even begin looking. I don't know what might contribute to the noise. Boards all look fine, caps look healthy.

Thanks in advance!

audiomachines · 10th December 2010, 09:41 AM

disassemble, clean, re-lubricate bush bearing of the transmotorfan

Creative1 · 10th December 2010, 02:43 PM

Thanks. Appreciate it.

I realized that I hear a click on both channels... Just seemed louder in channel 2.

Will definitely look at the fan. I think one that I have has a slow fan..

10th December 2010, 12:57 AM	#1
Creative1 diyAudio Member Join Date: Dec 2010	Crown MT1200 turn on click on channel 2? I'm trying to diagnose a turn on click that seems to only occur on Channel 2 on a Crown Microtech 1200. Happens about 1-1.5 seconds after turn on - and before any audio output occurs. Channel 1 never seems to do it. I diagnosed why channel 1 wasn't working (ODEP off and 84v to speakers) - and it was multiple shorted outputs.. Other than replacing the shorted outputs, any other "preventative maintenance" or other overhaul I should consider? Just wasn't sure where to even begin looking. I don't know what might contribute to the noise. Boards all look fine, caps look healthy. Thanks in advance!

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10th December 2010, 09:41 AM	#2
audiomachines diyAudio Member Join Date: Dec 2005 Location: silang, cavite	disassemble, clean, re-lubricate bush bearing of the transmotorfan

10th December 2010, 02:43 PM	#3
Creative1 diyAudio Member Join Date: Dec 2010	Thanks. Appreciate it. I realized that I hear a click on both channels... Just seemed louder in channel 2. Will definitely look at the fan. I think one that I have has a slow fan..

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