5.3.8 Sensor Operational Check
Function
This function allows you to check whether the eight sensors--document front sensor, document
rear sensor, scanner open sensor, registration sensor, paper ejection sensor, toner sensor, CCD HP
sensor, and document tray open sensor--operate correctly.
Operating Procedure
(1) Press the 3 and 2 keys in this order in the initial stage of the maintenance mode. The machine
beeps 1100 Hz and 400 Hz tones cyclically through the following volumes for testing the
speaker.
NOTE: To stop beeping, press the Menu key.
If the sensing status are as listed below, the LCD will show the following:
"FRRECVRGPOTNFHFC
Given below is the relationship between the LCD indication, sensor names and sensor status.
LCD
FR
RE
CV
RG
PO
TN
FH
FC
(2) Change the detecting conditions (e.g., insert paper through the document sensors or the
registration sensor, open the scanner unit, jam paper at the paper outlet, remove the toner
cartridge, move the CCD unit out of the home position, open the document tray), and then
check that the indication on the LCD changes according to the sensor states.
(3) To stop this operation and return the machine to the initial stage of the maintenance mode,
press the Stop key.
Sensors
Document front sensor
Document rear sensor
Scanner open sensor
Registration sensor
Paper ejection sensor
Toner sensor
CCD HP sensor
Document tray open sensor
Sensing status
No document detected.
No document detected.
Scanner unit closed.
No paper detected.
No paper jam.
Toner detected.
CCD unit placed in the home position
Document tray closed.
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