Originally Posted by
Brian8506
Problem is definitely in upper unit. Replaced sensor, brackets dont seem bent, and shutter seems to rotate fine. Switched upper unit with another machine so I know its in the upper. Any idea what else in upper unit could cause this code?
Check if small piece of paper is stuck inside rear frame connector > that the fuser plugs into.
may be necessary to remove the Fixing/Feeder Frame Assembly to see and remove paper from the connector on the rear frame of the machine
+Check the harness going from shutter H.P. sensor -
don't forget to clear ERROR>>>>>>
if the metal plate where the shutter HP sensor (PS53) is attached ,
could be bent/deformed a little > will cause error 840-0001
imageRUNNER 5070 / 5570 / 6570 E840
The E840 code relates to a fixing unit shutter position error condition. The error code can be generated because the shutter motor is not moving the shutter to the sensor detect position or because the shutter position sensor is not detecting the proper movement of the shutter. In this case, the shutter motor had failed because the shutter did not move. The shutter movement was inhibited by a bent Rear Shutter Gear Stopper (Part number FC6-3528-000).
The pictures below show the
improper position of the stopper.
E840.jpg
Stopper is Bent= no good
E840-.jpg
These pictures below show
the proper position of the stopper.
E840=.jpg
Position below is standard
E840--.jpg
The stopper is located on the rear of the Fixing Assembly pictured below.
E840==.jpg
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