Hitachi IJ UX Service Manual page 252

6.3.8 Target Sensor Fault
Target Sensor Fault
Is the target sensor fault
function required?
Yes
Is the "Sensor out timer"
setting is greater than
necessary for the sensor
normal ON time?
Yes
Does the sensor turn
ON and OFF?
Yes
Replace the EZJ127 board.
If the problem is
not fixed
Replace the EZJ126 board.
No
From the printing
specifications screen, select a
"Target sensor timer" setting
of "0000".
No
No
Clean the sensor to
eliminate any obstacle.
6-34
Select a setting that is
greater than necessary.
Is there any dirt
Yes
buildup or other
obstacle on the sensor?
No
Replace the sensor.
Clear the fault.
Resume the
operation.