Brother HL-4200CN Service Manual page 252

Menu
Part/signal name
No.
TRAY2 SIZE SWITCH
(SW2)
DI-22
TRAY2 SIZE SWITCH
(SW3)
DI-23
TRAY3 SIZE SWITCH
(DISPLAY)
DI-28
TRAY3 SIZE SWITCH
(SW1)
DI-29
TRAY3 SIZE SWITCH
(SW2)
DI-2a
TRAY3 SIZE SWITCH
(SW3)
DI-2b
FUSER FAN FAIL
DI-30
REAR FAN FAIL
DI-31
NO PRINT HEAD CARTRIDGE
DI-32
ASSY PKG
WASTE TONER FULL
DI-33
TRAY MODULE DETECTED
DI-34
NO TONER SENSOR (Y)
DI-38
NO TONER SENSOR (M)
DI-39
NO TONER SENSOR (C)
DI-3a
NO TONER SENSOR (K)
DI-3b
Test method
Set the side guide and end
guide of tray2 to the paper size.
Check the sensors signal.
When the SW2 is switched on,
displays L (low). Refer to the
BSD.
Set the side guide and end
guide of tray2 to the paper size.
Check the sensors signal.
When the SW3 is switched on,
displays L (low). Refer to the
BSD.
Set the side guide and end
guide of tray3 to the paper size.
Check the sensors signal.
The value (from 00 to 07) is
displayed that corresponded
with the size of paper. Refer to
the BSD.
Set the side guide and end
guide of tray3 to the paper size.
Check the sensors signal.
When the SW1 is switched on,
displays L (low). Refer to the
BSD.
Set the side guide and end
guide of tray3 to the paper size.
Check the sensors signal.
When the SW2 is switched on,
displays L (low). Refer to the
BSD.
Set the side guide and end
guide of tray3 to the paper size.
Check the sensors signal.
When the SW3 is switched on,
displays L (low). Refer to the
BSD.
Hold and release fuser fan.
Hold and release rear fan.
Mount and remove print head
cartridge ASSY.
Block and unblock the sensor
with paper.
Connect and disconnect the tray
module.
Replace and remove the toner
cartridge.
Replace and remove the toner
cartridge.
Replace and remove the toner
cartridge.
Replace and remove the toner
cartridge.
V-46
Reference
BSD
2.6.2A
2.6.2B
2.6.2A
2.6.2B
2.6.3
2.6.3
2.6.3
2.6.3
2.9.3
2.9.3
2.3.2
2.9.7
2.6.2A
2.6.2B
2.8.5
2.8.5
2.8.5
2.8.5