Brother HL-4000CN - Page 235

V-25
Media Type Mismatch FIP
Remedy
Step Check
Yes No
1
Initial setting
Check the following for evidence of fault.
OHP sensor replacing condition
Chute ASSY REGI replacing condition
Replace the parts
concerned
Go to step [2]
2
Checking OHP sensor
Does OHP sensor function normally?
Using diagnostic tool, check by digital
input test.
Replace MCU and
HVPS PWB
Go to step [3]
3
Checking MCU and HVPS PWB for signal
Is P/J32-2PIN<=>P/J32-1PIN 0VDC?
Go to step [4]
Go to step [5]
4
Checking MCU and HVPS PWB for signal
Make the paper approach to the sensor.
Does P/J32-2PIN<=>P/J32-1PIN change
from 0VDC to +3.3VDC?
Replace MCU and
HVPS PWB
Go to step [5]
5
Checking MCU and HVPS PWB for signal
Is P/J32-3PIN<=>P/J32-1PIN +5VDC?
Replace OHP
sensor
Replace MCU
and HVPS
PWB
Yellow Toner Cartridge Detached FIP
Remedy
Step Check
Yes No
1
Initial setting
Check the following for evidence of fault.
Cartridge replacing condition
Toner cartridge switch ASSY (Y) replacing
condition
Toner cartridge switch ASSY (Y) actuator
Replacing condition
Toner cartridge switch ASSY (Y)
connector replacing condition
Replace the parts
concerned
Go to step [2]
2
Checking toner cartridge switch ASSY
Does toner cartridge switch ASSY function
normally?
Using diagnostic tool, check by digital
input test.
Replace MCU and
HVPS PWB
Go to step [3]
3
Checking drive PWB for signal
Is P/J51-11PIN<=>P/J51-12PIN 0VDC?
Go to step [7]
Go to step [4]
4
Checking toner cartridge switch ASSY (Y)
for signal
Is P/J431-2PIN<=>P/J431-1PIN 0VDC?
Go to step [6] Go to step [5]
5
Checking toner cartridge switch ASSY (Y)
for continuity
Is P431-2PIN<=>P431-1PIN of toner
Cartridge switch ASSY (Y) continuous
normally?
Go to step [6]
Replace toner
cartridge
switch ASSY
(Y)
6
Checking harness ASSY TNR for
continuity
Is J51<=>J431 continuous normally?
Go to step [7]
Replace
harness ASSY
TNR
7
Checking drive PWB for signal
Is P/J42-4PIN<=>P/J42-14PIN 0VDC?
Go to step [8]
Replace drive
PWB