Brother HL-4000CN - Page 234

V-24
Remedy
Step Check
Yes No
30
Checking clutch ASSY MSI turn for
resistance value
Remove the clutch connector J19.
Is J19-1PIN<=>J19-2PIN less than 200Ω?
Replace MCU and
HVPS PWB
Replace MSI
turn clutch
31
Checking solenoid feed MSI for operation
Does the feed gear in the MSI run when
printing 1 sheet?
Check parts for
missing and
change paper, if
no problem
Go to step [32]
32
Checking MSI feed solenoid
Does MSI feed solenoid function
normally?
Using MSI feed solenoid diagnostic tool,
check by digital output test.
In the test, close the interlock SW.
Check the spring
and stopper of
MSI feed solenoid
for disengagement
Go to step [33]
33
Checking MSI feed solenoid for resistance
value
Remove J132 from MSI feed solenoid
Is J132-1PIN<=>J132-2PIN less than
100
Ω
?
Go to step [34]
Replace MSI
feed solenoid
34
Checking harness ASSY front 2 for
continuity
Check the following for continuity.
P132-1PIN<=>J139-11PIN
P132-2PIN<=>J139-10PIN
Go to step [35]
Replace
harness ASSY
front 2
35
Checking harness ASSY front 1A for
continuity
Check the following for continuity.
P139-1PIN<=>J13-11PIN
P139-2PIN<=>J13-10PIN
Replace MCU and
HVPS PWB
Replace
harness ASSY
front 1A