Hitachi IJ UX Service Manual page 241

6.2.22 Viscometer Ink Temperature Sensor Fault
Viscometer Ink
Temperature Sensor
Fault
Disconnect and reconnect the following
connectors.
▪ EZJ126: CN13
▪ EZJ132: CN1, 3
▪ Thermistor relay harness connector
Does the fault recur?
Replace the thermistor of Viscometer.
Does the fault recur?
Replace the EZJ126 board.
6.2.23 Ink Heating Unit Temperature Low
Ink Heating Unit Temperature Low
Disconnect the EZJ125
board CN7 connector and
reconnect it.
Is the fault issued
again?
Replace the heating unit.
Is the fault issued
again?
Replace the EZJ125 board.
Is the fault issued
again?
Replace the EZJ126 board.
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
6-23
Resume the
.
operation
Resume the
operation.