Brother DCP 8085DN, Service Manual

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Confidential
4.10 Sensor Operational Check (Function code 32)
<Function>
This function allows you to check whether the each sensors work correctly.
<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 [
OK ] button.
If the sensing status are as listed below, the LCD will show the following:
"C1P1C2P2T2T3BC**", "TNMPNTRMRSPOCV" and "DFDRDLDSFCFH****"
(which can be switched by pressing the [
Start ] button for machines.)
Given below is the relationship among the LCD indication, sensor names and sensor
status.
(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.
LCD Sensors Sensing status
C1
P1
C2
P2
T2
T3
BC
Tray1 sensor
Tray1 paper sensor
Tray2 sensor
Tray2 paper sensor
Tray2 connect sensor
Tray3 connect sensor
Back cover sensor
(Used for both standard tray and duplex tray.)
Tray installed.
Recording paper detected.
Tray installed.
Recording paper detected.
Tray2 connected.
Tray3 connected. (Not used)
Back cover detected.
(Tray detected.)
TN
MP
NT
RM
RS
PO
CV
Toner sensor
Multi-purpose tray sensor
New toner sensor
Front registration sensor
Rear registration sensor
Paper ejection sensor
Front cover sensor
Toner detected.
Recording paper detected.
New toner detected.
No paper detected.
No paper detected.
No paper detected.
Front cover detected.
DF
DR
DL
DS
FC
FH
AC
AS
Document front sensor (CCD model only)
Document front sensor 1 (CIS model only)
Document rear sensor
ADF document separation sensor/
Size sensor (CCD model only)
Document front sensor 2 (CIS model only)
ADF document switch back sensor
FB cover sensor
Document scanner home position sensor
ADF cover open sensor (CIS model only)
Paper eject sensor (CIS model only)
No document detected.
No document detected.
No document detected.
Document detected.
No document detected.
No document detected.
Document cover closed.
Scanner module home position detected.
ADF cover closed.
Document detected.
400 Hz
Low Medium High
OFF OFF
1100 Hz
Low Medium High