Brother HL-4200CN Service Manual page 238

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Black Toner Empty FIP
Step
Initial setting
Check the following for evidence of fault.
1
Low toner sensor replacing condition
Toner cartridge replacing condition
Toner motor replacing condition
Checking toner cartridge
2
Check if an error occurs though the toner
cartridge was replaced with a new one.
Checking PWBA HBN DRV for signal
3
Is P/J51-36<=>P/J51-35 less than
+0.2VDC?
Checking harness ASSY TNR4 for
4
continuity
Is J441<=>J51 continuous normally?
Checking low toner sensor
Check if an error occurs though the low
5
toner sensor was replaced with a new
one.
Checking harness ASSY DRV2-2 for
continuity
6
Is J12-24<=>J42-7 continuous normally?
Checking toner motor
Does toner motor function normally?
7
Using toner motor, check by digital output
test.
In the test, close the interlock SW.
Checking PWBA HBN DRV for signal
8
Is P/J51-24<=>P/J60-2 +24VDC?
Checking harness ASSY TNR4 for
9
continuity
Is J514<=>J51 continuous normally?
Checking toner motor
10
Check if an error occurs though the toner
motor was replaced with a new one.
Checking harness ASSY DRV1 for
continuity
Check the following for continuity.
11
J11-37<=>J41-4
J11-38<=>J41-3
J11-39<=>J41-2
J11-40<=>J41-1
Check
V-32
Remedy
Yes
Replace the parts
Go to step [2]
concerned
Go to step [3]
Go to step [4]
Go to step [6]
Replace
Go to step [5]
harness ASSY
TNR4
Go to step [6]
With tool go to
Replace
step [7]
harness ASSY
Without tool go to
DRV2-2
step [8]
Check the toner
stirring auger or
Go to step [8]
gear for damage
Replace PWBA
Go to step [9]
HBN DRV
Replace
Go to step [10]
harness ASSY
TNR4
Go to step [11]
Replace PWBA
Replace
HBN DRV, and if
harness ASSY
still faulty, replace
DRV1
MCU HL-4200
No
End of work
End of work
End of work

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