Brother HL-4000CN - Page 248

V-38
Tray2 Paper Near Empty FIP
Remedy
Step Check
Yes No
1
Initial setting
Check the following for evidence of fault.
Tray2 low paper sensor replacing
condition
Sensor actuator replacing condition
Replace the parts
concerned
Go to step [2]
2
Does the error occur even if the paper is
added?
Go to step [3] End of work
3
Checking tray2 low paper sensor
Does tray2 low paper sensor function
normally?
Tray2 low paper sensor using diagnostic
tool, check by digital input test.
Replace MCU and
HVPS PWB
Go to step [4]
4
Checking feeder PWB for signal
Is P/J82-10 PIN <=>P/J82-9 +3.3VDC?
Go to step [7] Go to step [5]
5
Checking feeder PWB for signal
Is P/J81-18 PIN <=>P/J81-23 +3.3VDC?
Replace feeder
PWB
Go to step [6]
6
Harness ASSY OPFPLG/ harness ASSY
Checking OPFREC/ harness ASSY
OPFMAIN for continuity
Check the following for continuity.
J81-18PIN<=>J810-A9PIN<=>J210-
B9PIN<=>J21-9PIN
Replace MCU and
HVPS PWB
Replace feeder
PWB
Replace
harness ASSY
which is not
continuous
7
Checking feeder PWB for signal
Is P/J82-8PIN<=>P/J82-9 +5VDC?
Replace tray2
low paper sensor
Replace feeder
PWB
Tray3 Paper Near Empty FIP
Remedy
Step Check
Yes No
1
Initial setting
Check the following for evidence of fault.
Tray3 low paper sensor replacing
condition
Sensor actuator replacing condition
Replace the parts
concerned
Go to step [2]
2
Does the error occur even if the paper is
added?
Go to step [3] End of work
3
Checking tray3 low paper sensor
Does tray3 low paper sensor function
normally?
Tray3 low paper sensor using diagnostic
tool, check by digital input test.
Replace MCU and
HVPS PWB
Go to step [4]
4
Checking feeder PWB for signal
Is P/J83-10 PIN <=>P/J83-9 +3.3VDC?
Go to step [7] Go to step [5]
5
Checking feeder PWB for signal
Is P/J81-17 PIN <=>P/J81-23 +3.3VDC?
Replace feeder
PWB
Go to step [6]
6
Harness ASSY OPFPLG/ harness ASSY
Checking OPFREC/ harness ASSY
OPFMAIN for continuity
Check the following for continuity.
J81-17PIN<=>J810-A10PIN<=>J210-
B10PIN<=>J21-10PIN
Replace MCU and
HVPS PWB
Replace feeder
PWB
Replace
harness ASSY
which is not
continuous
7
Checking feeder PWB for signal
Is P/J83-8PIN<=>P/J83-9 +5VDC?
Replace tray3
low paper sensor
Replace feeder
PWB