Hitachi UX Twin Nozzle Service Manual page 252

②
Does the initial-level
sensor operate?
No
Is the EZJ133 board CN13 or
EZJ138 board CN1, 4 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 EZJ133 board.*1
(*1): When you replace EZJ133 board, refer to
board (MPU board)".
[Caution]
Be sure to check that there is no wrong connection of harnesses by referring to
Identifying method of harnesses]
[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
[Replacement procedures of EZJ133 board]
"3.3.20 Electrical Connection Diagram".
in
6-10
③
Resume the
operation.
[Connector numbers and
"3.3.1 EZJ133
in