Hitachi IJ UX Service Manual page 239

6.2.19 Ambient Temperature Sensor Fault
Ambient Temperature
Sensor Fault
Disconnect the EZJ125 board
CN7 connector and reconnect it.
Does the fault recur?
Yes
Replace the print head.
Does the fault recur?
Yes
Replace the EZJ126 board.
6.2.20 Cooling Fan Fault
Cooling Fan Fault
Disconnect the EZJ126 board
CN21 connector and reconnect it.
Does the fault recur?
Yes
Replace cooling fan.
Does the fault recur?
Yes
Replace the EZJ126 board.
No
No
Resume the
operation.
No
No
Resume the
operation.
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