Question about Crown CE2000 Amplifier

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Fault condition My amp will go into fault mode for no apparent reason.  Turning the amp on and off several times will usually clear the condition and it operates normally otherwise but I'm concerned that it might quit in the middle of a gig.  This problem happens without any other equip./speakers connected.  FYI I bought this amp second hand and there was damage to the case (rack ears) during shipping. Any thoughts?  I'm reluctant to send it back to Crown due to shipping costs and it's age.  Watts are pretty inexpensive these days. Thanks in advance, Mike

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Re: fault condition

I cant assume to know your technical ability but, if you trust yourself to open the case without being scared, unplug the unit and do so. Then, where ever you can find connectors that unplug, do so and spray the contacts with something like De-oxit contact cleaner . You can buy some online or at radio shack.

This stuff only takes a few minutes to dry so you can check your amp again.

Dont send it to Crown ( too much $$$) . Maybe you can locate a shop in your area. Do a web search

Posted on Jan 08, 2008

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Re: fault condition

Bring it to repair shop near you something touch inside the amp

Posted on Dec 22, 2007

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You can't diagnose the amp with a PC. That's not what the RJ11 jack is for.

Have a read of your instruction manual (or download a copy from the Crown web site, and then read it). You'll see that the RJ11 is for fault monitoring. The feature allows a remote fault indicator circuit to be installed some distance away from the amps.

The fault indicator simply alerts an operator to a fault condition. The events that would trigger a fault are listed in the manual. The front panel indicators give a more comprehensive overview of the operating condition of the power amp.

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Check the connection to speaker with this amp, for any short or any other fault. disconnect the outputs, ie, speakers from the amp, and switch it On, and see the protect display comes or not. If it comes, the fault is internal and the set need service.
Your M3 dual Mono integrated amp, is of high output power and its outputs are protected against any overload or short circuit. If the system detect any among this condition specified above, it will show protect mode display.
Never load this amp, as protection display is there, as it may damage the speaker or its internal power amplifier section circuits, may cause more money to get it repaired. OK.

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Good question, well constructed, a real fault report.

I would say from you fault description that maybe there is a dry joint / loose connection somewhere in the system.

So check all your wiring / connections.

Put the amp back into 2 ch mode and check each ch with the same source and load, do it both cold, and then drive the amp and do it hot do the shake test on both ch, cold and hot.

maybe this will help id the faulty area, if both ch have fault the it might be the psu as this is common to both sides.

If you can track down the fault to a or b then you can resolder all the connections on the board, if you are not happy with taking the lid off then take your amp with your test report to a tech, the test results may save you time and money.

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If the amp is going into protect without audio passing it could very well be an internal short. In this case audio typically won't pass at line level. Have you tried turning the input gain stage knobs all the way down as well as the source material and slowly creep the volumes up? If it takes some audio before it faults you may want to double check the load you are placing on the amp's outputs. I'm assuming at this point it doesn't matter what speakers you are hooking it up too, it still crashed on you. Remember that Audio can be measured in voltage as well so you can measure the outputs of the amp with a volt-ohm meter.

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Do you get any Fault indications?

Have you swapped the speakers around to eliminate them as external causes?

When the channel dies is the unit very hot and is the fan turning very fast (it should be if hot)? The fan could be defective, slow or airflow may be restricted.

Turn the amp off and examine the fan guard on the rear to make sure it is clear of dust and debris. Vacuum it out if necessary. With a small thin non-metalic object reach in and test the fan for free movement by trying to rotate it. It should coast.

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The amp is in protect mode. Something in the final stage is defective. This is usually caused by shorted output transistors. This unit is worth getting repaired. Expect a parts cost in the $25-$50 range.


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This fault may be similar to a Harmon Kardon AVR1550 fault I recently encountered. I did all the usual checks e.g. testing for presence of DC on speaker outputs etc. but all seemed fine, then the fault cleared! Next day it re-appeared and attention was (falsely) given to the protection circuits as the amplifier circuits themselves were considered to be in order. The HK uses both voltage and current protection circuits and it was discovered that the current protection circuit was operating. Eventually the fault was found to be one of the 0.39 Ohm 3W metal oxide resistors that had gone high in value on the left hand channel. Of course your amplifiers fault may not be due to this but the reason for going into standby would probably be the same i.e. due to amplifier protection circuits operating. You need to check out all the output devices and those resistors on every channel, even surround ones you may not be using. Hope this helps.

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Respectfully, Muzick

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