8.4.9 Sensor Operational Check (Function code 32)- Page 176

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(2)  Change the detecting conditions to check that the indication on the LCD changes 

according to the sensor states.  For instance, insert paper through the document front (or 
rear) sensor or the registration sensor (s), open the front cover or the document cover, 
remove the toner cartridge, jam paper at the paper outlet, insert paper from the manual 
feeder, and load a recording paper tray, etc. 

(3) Press the 

Stop/Exit

 key.  The machine beeps for one second and return to the initial 

stage of the maintenance mode. 

NOTE:

 If you have opened and closed the front cover during the above procedure, you need  

to open and close the front cover again upon completion of the procedure.