DTG-C Model X, Service Manual

Page: 73 / 111

CODE DESCRIPTION
986 Humidity Sensor Abnormal
The printer detected that the humidity sensor was abnormal.
• Sensor connector loose, damaged, or defective.
• Sensor defective
1. Cycle printer on/off, check result.
2. Check control board connections.
3. Replace control board.
988 Ink Supply Error (Air Sensor Abnormal) DFU
Printer detected air sensor was abnormal when suction was applied 3 times when the printer was powered on
for the first time for ink tank filling or print head refreshing, but no air was detected.
• Cycle the printer off and on and try again.
• If the problem persists, the print head air sensors may be defective.
1. Replace the air release lever sensor and solenoid.
990 Ink Level Feeler Position Error DFU
The position of one or more ink level feelers could not be detected at initial filling.
Correct voltage could not be created for operation of the print head tank, so the print heads cannot operate.
• Ink level sensor defective
• Horizontal encoder film dirty, installed incorrectly, broken
• Maintenance unit dirty, defective
• Ink nozzles clogged
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.
991 Ink Pump Timeout Error DFU
The feeler of the ink lever sensor could not be detected.
• Obstruction blocking operation of the feeler
• Ink tube twisted, broken
• Tube disconnected causing an air leak
• Ink pump motor defective
996 No Input Signal from the Horizontal Encoder
No input signal from the horizontal encoder was detected during operation of the horizontal motor.
• Horizontal encoder sensor loose, broken, or defective.
• Horizontal encoder film broken, disconnected, or installed upside down.
• HRB defective
1. Cycle printer on/off, check result.
2. Confirm film encoder not loose.
3. Replace horizontal motor.