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.
Probable Cause: One or more of the following:
• The cap of the maintenance unit did not rise toward the carriage.
• The maintenance motor was not operating for suctioning ink from the print heads.
• Feelers of the ink level sensor missing or out of position.
• Film encoder dirty.
• Maintenance unit defective.
Location: Print head ink tank, feelers of the ink level sensor, encoder film strip, maintenance unit.
Procedure:
1. Cycle printer on/off, check result.
2. Clean suction cap.
3. Replace horizontal encoder film strip.
4. Replace maintenance unit.
5. Check the position of the feelers attached to the sides of the tanks.
SC993 High voltage leak
Description: A voltage leak was detected at the HVPS pack.
Probable Cause: The leak detection signal went ON then did not change, ink or condensation accumulated
on transport belt.
Location: HVPS pack, control board, transport belt
Procedure:
1. Cycle printer on/off, check result.
2. Raise top cover and check condition of transfer belt surface.
SC Code Errors
19
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