Hitachi IJ UX Service Manual page 259

6.3.21 Ink Level Sensor Broken (1)(3)
Ink Level Sensor
Broken (1)(3)
Go to "Level sensor confirmation"
screen and check if all sensors
contained in Makeup reservoir work
properly.
Turn OFF
power.
Any disconnection or
poor connection is found
at CN13 connector on
EZJ126 board or CN1 or
CN3 connector on
EZJ132 board?
No
Does the connection
harness have
electrical continuity?
Yes
Is ink deposition observed
between ground electrode
and sensor 1,2 or 3
electrode in Ink reservoir?
(check it by removing
harness and reconnecting)
No
Replace EZJ126 board.
Yes
Remove the connector once and
reconnect it
No
Replace the connection harness
Yes
Remove the ink deposition
on the electrodes and/or
in-between surface, OR
replace the sensor block of
Ink reservoir.
Restart IJP and go to
"Level sensor
confirmation" screen
and check if all sensors
No
contained in Ink
reservoir work properly.
6-41
Yes
End