J007/J010/J011 18 Repair Center Manual
SC984 DRV circuit temperature abnormal
Description: The temperature of the DRV board (driver board) is out of range (-13C to
+55C).
Probable Cause: The signal from the temperature sensor on the control board did not
change.
Location: Control board
Procedure:
1. Cycle printer on/off, check result.
2. Check fan operation.
3. Replace control board.
SC986 Humidity sensor abnormal
Description: An abnormality was detected in the humidity sensor.
Probable Cause: Defective temperature/humidity sensor.
Location: Control board
Procedure:
1. Cycle printer on/off, check result.
2. Check control board connections.
3. Replace control board.
SC988 Air sensor abnormal
Description: Air sensor was detected abnormal when suction was applied 3 times after the
printer was powered on for the first time for ink tank filling or print head refreshing, but no air
was detected.
Probable Cause: Defective plunger prevented the air release value from depressing
properly.
Location: Air sensor of the affected print head.
Procedure:
1. Replace the air release lever solenoid.
SC990 Ink level sensor feeler out of position
Description: One or more of the following occurred:
The ink level sensor feeler was not detected at initial ink filling or when air was purged
from the ink tanks before filling.
The proper air pressure inside the ink tank could not be achieved.
The signal from the ink level sensor did not change.
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