Brother HL-4000CN - Page 229

V-19
Duplex JAM FIP
Remedy
Step Check
Yes No
1
Initial setting
Check the following for evidence of fault.
Chute ASSY exit replacing condition
DUP motor replacing condition
DUP JAM sensor actuator replacing
condition
Chute ASSY out replacing condition
Replace the parts
concerned
Go to step [2]
2
Checking DUP JAM sensor
Does DUP JAM sensor function normally?
Using DUP JAM sensor diagnostic tool,
check by digital input test.
Go to step [7] Go to step [3]
3
Checking harness ASSY front 2 for signal
Push the DUP JAM sensor actuator by
finger
Is J319-3PIN<=>J319-2PIN 0VDC?
Go to step [5] Go to step [4]
4
Checking harness ASSY front 2 for
continuity
Is J133<=>J139 continuous normally?
Go to step [5]
Replace
harness ASSY
front 2
5
Checking harness ASSY front 1A for
continuity
Is P139<=>J13 continuous normally?
Go to step [6]
Replace
harness ASSY
front 1A
6
Checking DUP JAM sensor
Check if an error occurs though the
sensor was replaced with a new one.
Go to step [7] End of work
7
Checking DUP motor for operation
Check if the sheet is reversed when
printing 1 sheet in the duplex mode.
Go to step [13] Go to step [8]
8
Checking DUP motor
Does DUP motor function normally?
Using DUP motor diagnostic tool, check
by
digital output test.
In the test, close the interlock SW.
Go to step [13] Go to step [9]
9
Checking drive PWB for signal
Is P/J50-1PIN<=>P/J60-2PIN +24VDC?
Go to step [10]
Replace drive
PWB
10
Checking harness ASSY DUP for
continuity
Is J131<=>J50 continuous normally?
Go to step [11]
Replace
harness ASSY
DUP
11
Checking harness ASSY DRV 2 for
continuity
Check the following for continuity.
J12-5PIN<=>J42-26PIN
J12-6PIN<=>J42-25PIN
J12-7PIN<=>J42-24PIN
J12-8PIN<=>J42-23PIN
J12-29PIN<=>J42-2PIN
Go to step [12]
Replace
harness ASSY
DRV2
12
Checking DUP motor
Check if an error occurs though the
motor was replaced with a new one.
Replace MCU and
HVPS PWB
End of work
13
Dose the exit roll rotate smoothly by hand?
Check the sheets
for gear or skew
Check the
gears for
foreign
substances