Question about Minolta EP4000/5000 CS/PRO Copier

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Code C0400 contact rep at certain phone #...# out of service.

Making copies, and copier all of a sudden stops and gives error code C0400 (c is lighter than the #s). Copier is completely locked up.

Any assistance will be greatly appreciated.

Derek Lard

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C0400 is exhaust fan code. Open the front door to clear. Make also all covers are closed front and both sides.

Posted on Jul 12, 2009

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Minolta 3000 giving code c400

Posted on May 05, 2014

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Take the rear panel off the machine. In the back near the top you'll see a rat cage fan, below that you'll see a steel plate with a pancake motor below it. Take out the single screw holding that plate and remove the plate. Remove the ozone filter behind that plate and clean all the dust off of it, it'll probably be totally plugged, and reinsert it. That may or may not fix the problem, probably not because the fan motor is most likely going bad.

Posted on Jul 16, 2009

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Posted on Jan 02, 2017

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1. Test Mode Operations
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1-1. Entering the Tech. Rep. Mode
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Minolta ep4000 error code c0400


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What is a code C0400?


Open the front door to your left upper, remove the access cover and press the trouble reset button the code you have is for the very bright light that comes on under the big glass when each copy is made. if the code comes back replace the exposure lamp and board. try web site below for a start,




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1 Answer

Error code 040


I think you will find this is error code c0400 this issue if the code i am giving you is correct is a fault with the exposure lamp you can test the lamp for cont using a digital meter if the lamp turns out to be ok there is a fault with the ae sensor board on pwb-h you would need to replace this board

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