Sensor Operational Check - Brother 1920CN - Color Inkjet - Fax Service Manual

3.8

Sensor Operational Check

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Function
This function allows you to check whether the eight sensors--document front sensor, document
rear sensor, cover sensor, registration sensor, toner sensor, paper ejection sensor, manual
insertion sensor, and cassette sensor--operate correctly.
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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:
If the sensing status are as listed below, the LCD will show the following:
"DFDRCVRSTNPOFHR2" and "MNCSC2" (which can be switched by pressing the Start
key for machines w/ fax or the Sort key for machines w/o fax)
Given below is the relationship between the LCD indication, sensor names and sensor status.
LCD
DF
DR
CV
RS
TN
PO
FH
R2
MN
CS
C2
(*These error indications will always be displayed in models not equipped with a 2nd paper cassette.)
(2) Change the detecting conditions (e.g., insert paper through the document sensors or the
registration sensor(s), open the front cover, remove the toner cartridge, jam paper at the
paper outlet, insert paper manually through the paper slot, and load the paper cassette(s)),
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.
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.
For models w/ fax: To stop beeping, press the Function/Menu key.
For models w/o fax: To stop beeping, press the Menu key.
Sensors
Document front sensor
Document rear sensor
Cover sensor
Registration sensor
Toner sensor
Paper ejection sensor
CCD HP sensor
2nd registration sensor*
Manual insertion sensor
Cassette sensor
2nd cassette sensor*
Sensing status
No document detected.
No document detected.
Front cover closed.
No paper detected.
No toner detected.
No paper jam.
CCD placed in home position
No paper detected.
No paper detected.
No paper cassette loaded.
No paper cassette loaded.
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