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Old 18th January 2013, 12:17 PM   #1
diyAudio Member
Join Date: Jan 2010
Default Crown MA5002VZ

Hey guys, can anyone help with this problem?

I have a Crown MA5002VZ I am currently working on, When I apply a signal to input B the amplifier shows on the variac that the current draw starts to increase drastically with the slightest input as though there is a serious short. Checked all major components on the output module, predrivers, drivers, outputs, emiiter resistors, diodes etc. Eveything looks ok. The amp will power up and go active without any signal. As soon as you input anything thats when it goes into protect.

Any advice on troubleshooting this would be apprecited.

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Old 18th January 2013, 12:58 PM   #2
diyAudio Member
Join Date: Mar 2007
Location: Canandaigua, NY USA
Not a clue as to what it might be here, but could you apply the slightest signal where the current rises but the amp doesn't quite protect, then go look for the component that gets warm or hot?
I may be barking up the wrong tree, but at least I'm barking!
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Old 18th January 2013, 01:19 PM   #3
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Join Date: Jan 2010
thanks for the reply. working on finding the bad part
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Old 18th January 2013, 01:19 PM   #4
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as soon as you turn the pot it draws current
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