Sensor Operational Check - Brother FAX2800 Service Manual

5.3.9 Sensor Operational Check

Function
This function allows you to check whether the seven sensors (six sensors on European models)--
document front sensor, document rear sensor, cover sensor, registration sensor, toner sensor, paper
ejection sensor, and hook switch*--operate correctly.
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:
"DFDRCVRGPO TNHK" on American models
"DFDRCVRGPO TN" on European models
Given below is the relationship between the LCD indication, sensor names and sensor status.
LCD
DF
DR
CV
RG
PO
TN
HK
(2) Change the detecting conditions (e.g., insert paper through the document sensors or the
registration sensor(s), open the top cover, jam paper at the paper outlet, remove the toner
cartridge, and 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.
Sensors
Document front sensor
Document rear sensor
Cover sensor
Registration sensor
Paper ejection sensor
Toner sensor
Hook switch*
Sensing status
No document detected.
No document detected.
Top cover closed.
No paper detected.
No paper jam.
Toner detected.
On-hook state.
5 -1 5
(*European models have no hook switch.)