Stylus Pro 4880 Field Repair Guide 1/17/08
Missing Nozzle Diagnosis and Repair Printer Component, Software Item, LCD Display, Printer Button Page 122.
1.1.1 When the Printhead moves off of the Cap, and the Pump is running, inject water into the Cap with
a syringe.
1.1.1.1 If the water is drawn through the Cap, the Pump is good.
1.1.1.2 If water is not drawn through the Cap, check the Pump Tube connections to the Cap.
1.1.1.3 If the Pump Tube connection is good, replace the Pump.
2. Check the Cap’s seal with the Printhead
2.1 Check the amount of ink in the Cap (it should be clean because of step 1).
2.2 Run a cleaning cycle
2.3 Check the amount of ink in the Cap (there should be clear signs of ink compared to step 2.1).
2.3.1 If there is no ink:
2.3.1.1 The Cap is not sealing with the Printhead.
2.3.1.1.1 Check the Cap Assembly for mechanical problems.
3. Check Printhead Fuses on Main Board.
3.1 If the Fuses are blown, replace the Main Board.
3.2 If the Fuses are good, replace the Printhead.
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