Hitachi UX Twin Nozzle Service Manual page 270

6.2.14a (N1)Ink Heating Unit Temperature Sensor Fault
(N1)Ink Heating Unit
Temperature Sensor
Fault
Disconnect the EZJ125 board
CN7 connector and reconnect it.
▪ Clear the fault.
▪ From the maintenance screen, place
the heating unit in the operating mode. *)
▪ Restart the IJ printer.
Does the fault recur?
Replace the heating unit.
▪ Clear the fault.
▪ From the maintenance screen, place
the heating unit in the operating mode. *)
▪ Restart the IJ printer.
Does the fault recur?
Replace the EZJ125 board.
▪ Clear the fault.
▪ From the maintenance screen, place
the heating unit in the operating mode. *)
▪ Restart the IJ printer.
Does the fault recur?
Replace the EZJ133 board. *3
- On detecting this fault, the IJ printer automatically sets the "Ink temperature
correction" to (disable).
"System environment setup: Ink temperature correction (enable)  (disable)"
After getting rid of the fault, reset the Ink temperature correction to (enable).
"System environment setup: Ink temperature correction (disable)  (enable)"
- In the condition of the "Ink temperature correction (disable), " the "Ink Temperature
Correction Notice" message appears each time the power is turned on.
(See "1.6 Heating of Ink" in the Instruction manual".)
*) Refer to the following caution.
No
Yes
*1
No
Yes
*2
No
Yes
Caution
!
6-28
(*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
procedures of EZJ133 board]
(MPU board)".
[Caution]
Be sure to check that there is no wrong connection of harnesses
[Connector numbers and Identifying method of
by referring to
harnesses] "3.3.20 Electrical Connection Diagram".
in
*) Refer to the
following caution.
*) Refer to the
following caution.
Resume the
operation.
[Replacement
in "3.3.1 EZJ133 board