Pro 7900 and 9900 Field Repair Guide 10/6/10
Missing Nozzle Diagnosis Printer Component, Software Item, LCD Display, Printer Button Page 234.
Ink. A cleaning cycle delivers a much stronger demand on the Ink System and will refill the Print Head
with Ink. The process of printing will once again “starve” the Print Head.
1. Determine the amount of printing that it takes for the Nozzles to drop out.
1.1 Note that interval.
2. Perform a Power Cleaning cycle.
2.1 Perform a nozzle check and ensure that all of the nozzles are working.
The purpose of the Power Cleaning cycle is to remove the any air in the Dampers that might restrict ink
flow.
3. Print until the interval in step 1 has been exceeded (2 times the interval is recommended).
4. If the issue persists, replace the related Damper. It is recommended that you replace all 5
Dampers.
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