Brother HL-4000CN Service Manual page 231

REGI JAM FIP
Step
Initial setting
Check the following for evidence of fault.
1
REGI sensor actuator replacing condition
chute ASSY REGI replacing condition
Checking REGI sensor
Does REGI sensor function normally?
2
Using REGI sensor diagnostic tool, check
by Digital Input Test.
Checking REGI clutch harness for
connection
3
Is it connected normally to the REGI
sensor?
Checking REGI clutch harness for
4 continuity
Is J181<=>J18 continuous normally?
Checking MCU and HVPS PWB for signal
5
Is P/J18-3<=>P/J18-2 0VDC?
Checking clutch REGI
Does clutch REGI function normally?
6 Using clutch REGI diagnostic tool, check
by digital output test.
In the test, close the interlock SW.
Checking clutch REGI for resistance value
Remove the clutch connector J18.
7
Is J18-4PIN<=>J18-5PIN less than 200 ?
Checking MCU and HVPS PWB for signal
8 Close the interlock SW
Is P18-4PIN<=>P18-2PIN +24VDC?
Checking chute REGI
Does the roll rotate smoothly by hand?
9
Feed JAM FIP
Step
Initial setting
Check the following for evidence of fault.
Paper cassette replacing condition
Paper condition in cassette
Wear or damage of rolls and gears in
1
feeder
Paper dust or foreign substances in paper
path
REGI sensor replacing condition
Main drive ASSY replacing condition
Checking REGI sensor
Does REGI sensor function normally?
2
Using diagnostic tool, check by digital
input test.
Check
Check
V-21
Remedy
Yes
Replace the parts
Go to step [2]
concerned
Go to step [6] Go to step [3]
Replace the
parts
Go to step [4]
concerned
Replace chute
Go to step [5]
REGI
Replace REGI
Go to step [6]
sensor
Go to step [9] Go to step [7]
Replace chute
Go to step [8]
REGI
Replace MCU
Go to step [9] and HVPS
PWB
Replace the chute
REGI on the
Replace chute
machine, and
REGI
check the gears
for meshing.
Remedy
Yes
Replace the parts
Go to step [2]
concerned
Go to step [6] Go to step [3]
No
No