Replacement Procedure:
1. Do "Head-Cleaning" 3 times.
2. Do "Head-Flushing" 1 time.
3. Replace the print head.
4. Replace the control board.
Vertical bands missing
Description: One or more of the following:
• Image on the left edge of the paper appears masked
• mage in the middle of the paper appears masked
• Parts of the image area missing and streaked
Probable Cause: Change in the 1st registration sensor signal is weak, encoder is dirty.
Location: 1st registration sensor, control board, encoder film strip (horizontal)
Service Center Procedure:
1. Print a Nozzle Check Pattern and check the results.
2. Check the amount of line feed during printing.
3. Do "Head-Cleaning" 3 times .
4. Do "Head-Flushing" 1 time.
5. Adjust line feed.
Replacement Procedure:
1. Do "Head-Cleaning" 3 times.
2. Do "Head-Flushing" 1 time.
3. Replace encoder sensor.
4. Replace horizontal encoder film strip.
5. Replace control board.
Nozzles not firing, cannot recover
Description: Neither head cleaning nor head flushing can recover operation of the print head nozzles.
Probable Cause: Suction cap, print head defective.
Location: Maintenance unit, print head
Service Center Procedure:
1. Do a Nozzle Check print and check the results.
Other Problems
41
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