Hitachi IJ UX Service Manual page 225

②
Does the initial-level
sensor operate?
No
Is the EZJ126 board CN13 or
EZJ132 board CN1, 3 connector
disconnected?
No
Disconnect the connectors, then
reconnect them (3 connectors).
Does the initial-level
sensor operate?
No
Is the connection harness
conducting?
Yes
Is the fault cleared by
power-on reset?
No
Replace the EZJ126 board.
[CAUTION]
If you remove a solenoid valve or other piping part without relieving the
pressure from the path, the ink may gush out. Before performing the above
steps, be sure to provide pressure relief.
Yes
Yes
Connect the connector.
Yes
No
Replace the harness.
Yes
Resume the
operation.
6-7