Servicing: 9040 Contrast 
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4. Check the viscosity. 
Ƒ If the value is below "Reference visco. :" 
Shut down the printer normally and empty the recovery tank. 
Then pour half a liter of fresh ink into the ink tank.
Then restart the printer normally. 
Ƒ If the value is above "Reference visco. :" 
Pour a liter of additive into the additive tank. 
Then restart the printer normally. 
Allow the printer to run as the viscosity management system will correct itself 
automatically.