Brother HL-4000CN Service Manual page 255

4.8.1 Digital input test
Function: Displaying a sensor or switch signal level on the LCD panel as "H" or "L" and
also the number of changes from "H" to "L" or "L" to "H"
Operation procedure:
1. Enter the Diag. (C/E) mode.
2. Select [CE Maintenance IOT Diag] with the
3. Press the Form Feed/Set button to advance to diagnostic menu selection in [CE
Maintenance IOT Diag].
4. Select [IOT Diag Digital Input] with the
5. Press the Form Feed/Set button to advance to diagnostic menu selection in [IOT
Diag Digital Input].
6. Select the menu No. of a digital input test with the
(For the contents of the diagnostic items, refer to the table at right.)
7. Press the Form Feed/Set button to execute the diagnosis.
8. The LCD panel displays the sensor status (H: Sensor OFF, L: Sensor ON) and the
number of sensor ON/OFF changes.
9. Press the Job Cancel/Back button to terminate the diagnosis.
10. Press the Menu button to terminate the diagnosis if in progress and return to the
[IOT Diag Digital Input] display.
Digital input test code table
Menu
No.
FULL STACK SENSOR
DI-0
DUP JAM SENSOR
DI-1
Exit Sensor
DI-2
(FUSER ASSY)
REGI. SENSOR
DI-3
SCANNER RDY
DI-4
FUSER RDY
DI-5
CTD RDY
DI-6
INTERLOCK OPEN
DI-7
TONER CARTRIDGE SWITCH
DI-8
ASSY (Y)
TONER CARTRIDGE SWITCH
DI-9
ASSY (M)
TONER CARTRIDGE SWITCH
DI-a
ASSY (C)
TONER CARTRIDGE SWITCH
DI-b
ASSY (K)
LOW TONER SENSOR (Y)
DI-c
LOW TONER SENSOR (M)
DI-d
LOW TONER SENSOR (C)
DI-e
LOW TONER SENSOR (K)
DI-f
MSI NO PAPER SENSOR
DI-10
TRAY1 NO PAPER SENSOR
DI-11
Part/signal name
V-45
and buttons.
and buttons.
and
Test method
Block and unblock the sensor
with an actuator.
Block and unblock the sensor
with an actuator.
Block and unblock the sensor
with an actuator.
Block and unblock the sensor
with an actuator.
Open and close the front cover.
Replace and remove the toner
cartridge.
Replace and remove the toner
cartridge.
Replace and remove the toner
cartridge.
Replace and remove the toner
cartridge.
Block and unblock the sensor
with an actuator.
Block and unblock the sensor
with an actuator.
buttons.
Reference
BSD
2.9.4
2.9.4
2.9.1
2.7.6
2.5.1
2.9.1
2.8.7
2.1.1
2.8.3
2.8.3
2.8.3
2.8.3
2.8.5
2.8.5
2.8.5
2.8.5
2.7.2
2.6.1