Sensor Operational Check (Function Mode 32) - Brother FAX-2820 Service Manual

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
DF
DR
CV
HK
NT
MN
RS
TN
KO
FU
(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.
Sensors
Document front sensor
Document rear sensor
Cover sensor
Hook Switch
New toner sensor
Manual insertion sensor
Registration sensor
Toner sensor
Tail edge sensor
Fixing sensor
8 -1 6
Sensing status
No document detected.
No document detected.
Front cover closed.
On-hook state
New toner detected.
No paper detected.
No paper detected.
Toner detected.
No paper detected.
No recording paper detected.
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