Brother HL-4000CN - Page 233

V-23
Remedy
Step Check
Yes No
19
Checking harness ASSY FDR for
continuity
Check the following for continuity.
J47-13PIN<=>P475-2PIN
J47-14PIN<=>P475-1PIN
Go to step [20]
Replace
harness ASSY
FDR
20
Checking tray1 turn clutch ASSY for
resistance value
Remove the clutch connector J475.
Is J475-1PIN<=>J475-2PIN less than
200Ω?
Go to step [21]
Replace tray1
turn clutch
ASSY
21
Checking harness ASSY DRV2 for
continuity
Is J12-9PIN<=>J42-22PIN continuous
normally?
Replace MCU and
HVPS PWB
Replace
harness ASSY
DRV2
22
Checking tray1 feed solenoid for operation
Does the feed gear in the feeder run when
printing 1 sheet?
Check parts for
missing and
change paper, if
no problem
Go to step [23]
23
Checking tray1 feed solenoid
Does tray1 feed solenoid function
normally?
Using tray1 feed solenoid diagnostic tool,
check by digital output test.
In the test, close the interlock SW.
Check the spring
and stopper of
tray1 feed
solenoid for
disengagement
Go to step [24]
24
Checking drive PWB for signal
Is P/J47-11PIN<=>P/J60-2PIN +24VDC?
Go to step [25]
Replace drive
PWB
25
Checking harness ASSY FDR for
continuity
Check the following for continuity.
J47-11PIN<=>P474-2PIN
J47-12PIN<=>P474-1PIN
Go to step [26]
Replace
harness ASSY
FDR
26
Checking tray1 feed solenoid for
resistance value
Remove the solenoid connector J474.
Is J474-1PIN<=>J474-2PIN less than
100Ω?
Go to step [27]
Replace tray1
feed solenoid
27
Checking harness ASSY DRV2 for
continuity
Is J12-10PIN<=>J42-21PIN continuous
normally?
Replace MCU and
HVPS PWB
Replace
harness ASSY
DRV2
28
Checking MSI turn clutch for operation
Does the turn roll in the MSI run when
printing 1 sheet?
Go to step [31]
Go to step [29]
29
Checking MSI turn clutch
Does MSI turn clutch function normally?
Using MSI turn clutch diagnostic tool,
check by digital output test
In the test, close the interlock SW.
Check the clutch
for slip, or the gear
for damage.
Go to step [30]