Brother Intelli FAX-2820, Service Manual

Page: 170 / 321

8-16 Confidential
8.4.9 Sensor Operational Check (Function code 32)
Function
This function allows you to check whether the 9 sensors.
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. To stop beeping, press the
Menu/Set key.
If the sensing status are as listed below, the LCD will show the following:
"DFDRCVHK" and "NTMNRSTNKOFU" (which can be switched by pressing the
Start key for machines.)
Given below is the relationship between the LCD indication, sensor names and sensor
status.
LCD Sensors Sensing status
DF Document front sensor No document detected.
DR Document rear sensor No document detected.
CV Cover sensor Front cover closed.
HK Hook Switch On-hook state
NT New toner sensor New toner detected.
MN Manual insertion sensor No paper detected.
RS Registration sensor No paper detected.
TN Toner sensor Toner detected.
KO Tail edge sensor No paper detected.
FU Fixing sensor No recording paper detected.
(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.