Question about Ricoh Aficio 450 Copier

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Problem with Aficio 450 door cover sensors

A friend of mine is having trouble with his copier. On the message panel it is displaying: door covers open. close covers on relay. I have been over the machine checking all the door covers and even activating the sensors to try and get it to register they are closed but to no avail. Any ideas ? cheers in advance. Ray.

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Re: Problem with Aficio 450 door cover sensors

I post a solution for this problem see:

Posted on Sep 22, 2009

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Re: Problem with Aficio 450 door cover sensors

First check the small door below the duplex unit on right side, if that is closed porperly and all others are also, it could indicate a blown fuse condition.

Posted on May 08, 2007

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Can power on

Check the fuses.Blown fuse conditions
FU1 - 6,3A Doors/covers open is displayed.
FU2 - 6,3A Doors/covers open for the finisher is displayed.
FU3 - 4A paper end condition.
FU4 - 6,3A SC 121 is displayed.
FU5 - 6,3A one of SC302 or SC403 or SC405 is displayed.
FU101 - 15A no response.
Fu 102 - 8A no response.
FU103 - 1A normal operation,optional heaters do not work.
If FU or 102 is the problem,verify the main motor and the fusing unit heater lamps and thermofuses.After change the problematic fuse removal the fusing unit and turn ON the copier.

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1 Answer

My Ricoh aficio 450 copier shows a error that says: close door for relay. I have closed all the covers and doors and still get the same error message.

The relay door is the door on the lower right side, below the duplex unit. Check this door -- it may not be closed all the way, or the actuator (the piece of plastic that sticks off the door and is the part that blocks the sensor) may be broken. If neither of these is the case, the sensor may be bad.

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