Sensor Operational Check - Brother MFC8500 Service Manual

3.9

Sensor Operational Check

n n n n Function
This function allows you to check whether the 12 sensors (11 sensors on European models)--
document front sensor, document rear sensor, cover sensor, registration sensor, toner sensor, paper
ejection sensor, hook switch*, 2nd registration sensor**, manual insertion sensor, cassette sensor,
2nd cassette sensor**, and jam sensor--operate correctly.
n n n n Operating Procedure
(1) Press the 3 and 2 keys in this order in the initial stage of the maintenance mode. The
equipment 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 two character strings
which can be switched by pressing the Fax Start key:
American models
"DFDRCVRSTNPOHK
"DFDRCVRSTNPOHKR2" and "MNCSC2P2" on models having a 2nd paper cassette
European models
"DFDRCVRSTNPO
"DFDRCVRSTNPO
Given below is the relationship between the LCD indication, sensor names and sensor status.
LCD
DF
DR
CV
RS
TN
PO
HK
R2
MN
CS
C2
P2
(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 or inside the heat-fixing unit, lift up the handset*, and then check that the indication on
the LCD changes according to the sensor states.
(3) To stop this operation and return the equipment to the initial stage of the maintenance mode,
press the Stop key.
NOTE: If you have opened and closed the top cover during the above procedure, you need to open
and close the front cover again upon completion of the procedure.
" and "MNCS
" and "MNCS
R2" and "MNCSC2P2" on models having a 2nd paper cassette
Sensors
Document front sensor
Document rear sensor
Cover sensor
Registration sensor
Toner sensor
Paper ejection sensor
Hook switch*
2nd registration sensor**
Manual insertion sensor
Cassette sensor
2nd cassette sensor**
Jam sensor
(**These sensors are provided for models supporting a 2nd paper cassette.)
P2"
P2"
No document detected.
No document detected.
Top cover closed.
No paper detected.
No toner detected.
No paper jam.
On-hook state.
No paper detected.
No paper detected.
No paper cassette loaded.
No paper cassette loaded.
No paper jammed.
V - 15
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(*European models have no hook switch.)
Sensing status
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