Brother HL-4000CN Service Manual page 232

Step
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 main drive motor for operation
Does the main drive motor run when
6
printing 1 sheet?
Checking main drive motor
Does main drive motor function normally?
7 Using diagnostic tool, check by digital
output test.
In the test, close the interlock SW.
Checking drive PWB for signal
8
Is P/J48-1PIN<=>P/J60-2PIN +24VDC?
Checking interlock SW
9 Is the interlock SW pressed normally?
Checking interlock SW for signal
Check the following if +24VDC is present.
10
SW-1PIN<=>P/J60-2PIN
SW-2PIN<=>P/J60-2PIN
Checking drive PWB for power supply
11
Is P/J60-1PIN<=>P/J60-2PIN +24VDC?
Checking drive PWB for power supply
12
Is P/J61-8PIN<=>P/J61-7PIN +5VDC?
Checking drive PWB for power supply
13
Is P/J61-6PIN<=>P/J61-5PIN +3.3VDC?
Checking harness ASSY LVNC for
14 continuity
Is J61<=>J165 continuous normally?
Checking harness ASSY DRV1 for
continuity
Check the following for continuity.
15
J41-30PIN<=>J11-11PIN
J41-31PIN<=>J11-10PIN
J41-33PIN<=>J11-8PIN
Checking tray1 turn clutch ASSY for
operation
16
Does the turn roll in the feeder run when
printing 1 sheet?
Checking tray1 turn clutch ASSY
Does tray1 turn clutch ASSY function
normally?
17
Using tray1 turn clutch ASSY diagnostic
tool, check by digital output test.
In the test, close the interlock SW.
Checking drive PWB for signal
18
Is P/J47-13PIN<=>P/J60-2PIN +24VDC?
Check
V-22
Remedy
Yes
Replace the
parts
Go to step [4]
concerned
Replace chute
Go to step [5]
REGI
Replace REGI
Go to step [6]
sensor
Tray go to step
[16]
Go to step [7]
MSI go to step
[28]
Replace MCU and
Go to step [8]
HVPS PWB
Go to step [12] Go to step [9]
Replace the
Go to step [10] parts
concerned
Replace deive
Go to step [11]
PWB
Replace deive
Go to FIP-DC
PWB
Go to step [13] Go to step [14]
Go to step [15] Go to step [14]
Replace
Go to FIP-DC harness ASSY
LVNC
Replace
Replace MCU
harness ASSY
and HVPS PWB
DRV1
Go to step [22] Go to step [17]
Check the clutch
for slip, or the gear Go to step [18]
for damage.
Replace drive
Go to step [19]
PWB
No