Hitachi UX Twin Nozzle Service Manual page 279

6.2.23a (N1)Ink Heating Unit Temperature Low
(N1)Ink Heating Unit Temperature
Low
Disconnect the EZJ125
board CN7 connector and
reconnect it.
Is the fault issued
again?
Replace the heating unit. *1
Is the fault issued
again?
Replace the EZJ125 board. *2
Is the fault issued
again?
Replace the EZJ133 board. *3
(*1): When you replace Heating unit, refer to "5.6 Heating unit replacement".
(*2): When you replace EZJ125 board, refer to [Replacement procedures of EZJ125 board] in "3.3.5
EZJ125 board (Nozzle1 drive board)".
(*3): When you replace EZJ133 board, refer to
EZJ133 board (MPU board)".
[Caution]
Be sure to check that there is no wrong connection of harnesses by referring to
Identifying method of harnesses]
No
Yes
No
Yes
No
Yes
[Replacement procedures of EZJ133 board]
"3.3.20 Electrical Connection Diagram".
in
6-37
Resume the
operation.
[Connector numbers and
"3.3.1
in