Roland Soljet EJ-640 User Manual page 72

When Problems such as Dot Drop-out Are Not Fixed
When dot drop-out or dot deflection is not improved even if cleaning is performed several times, you
can clean the surface of the print heads as an emergency measure. The print head surface is a very
delicate mechanism, so work must be performed carefully and cautiously.
Note that this operation is an emergency measure. Depending on symptoms, it may damage normal
areas and cause symptoms to worsen. If you have any questions, contact your authorized Roland DG
Corp. dealer.
Procedure
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Cleaning of the surface of the print heads as an emergency measure
Soak up a generous amount of cleaning liquid using a cleaning stick.
Very gently touch the cleaning stick against the print head surface.
Very softly press the cleaning stick against the print head so that cleaning liquid soaks
into the print head surface. Never rub the stick or press it forcefully against the print head
surface.