Brother FAX 560, Service Manual

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3.8 Sensor Operational Check
Function
This function allows you to check that the seven sensors (document front sensor, document rear
sensor, cover sensor, hook switch*, registration sensor, ribbon sensor, and arm HP switch) operate
correctly.
(*In the models not equipped with handset, the hook switch serves no function.)
Operating Procedure
(1) Press the 3 and 2 keys in this order in the initial stage of the maintenance mode. The
equipment sounds 1100 Hz and 400 Hz tones cyclically through the following volumes for
testing the speaker.
To disable the speaker, press the Function key (American models) or Menu key (European
models). With the key, you may toggle the speaker on and off.
If the sensing status are as listed below, the LCD will show the following:
"FRERCPHRXCH 0" on the models not equipped with handset
"FRERCPHRXCHHK 0" on other models
Given below is the relationship between the LCD indication, sensor name and sensor status.
LCD Sensors Sensing status
FRE Document front and rear sensors No document detected.
RC Cover sensor Control panel ASSY closed.
PH Registration sensor Recording paper loaded
RX Ribbon sensor Ribbon cartridge loaded.
HK Hook switch On-hook state.
CH Arm HP switch (on the drive unit) Switching arm out of the home position.
(2) Change the detecting conditions and check that the displayed letters disappear. For example,
insert a document through the document front (or rear) sensor and check that the "F" ( or "E")
of the FRE disappears.
(3) To stop this operation, press the Stop key. The equipment beeps for one second and returns
to the initial stage of the maintenance mode.
In this area a numeral appears, indicating
the number of communications records
printed out at the factory for testing.