Ricoh D124-17 Service Manual page 604

6. Troubleshooting
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D Ink Supply Error: Head 3
D Ink Supply Error: Head 4
D Ink Supply Error: Head 5
• Feeler broken, damaged, or blocked
• Air release solenoid blocked
• Air release solenoid defective
• Ink supply pump or tube defective
D Carriage Horizontal Initialization Error
The machine failed to detect the carriage unit at the start position.
• Horizontal encoder installed incorrectly (not inserted into the gap of the
horizontal encoder sensor)
• Horizontal encoder strip dirty
• Horizontal encoder strip loose, broken, defective
• Horizontal encoder sensor connector loose, broken, defective
• Horizontal encoder sensor defective
D Carriage Communication Error
The machine detected no response from the carriage unit.
• Cycle the machine off/on
• If the problem recurs, check around the HRB on the carriage unit for a
loose, broken, or defective connector
• Check around the MCU for a loose broken connector on a harness from
the carriage unit.
D Carriage Hardware Error
The machine detected a hardware error for the carriage unit.