Olivetti JP 90, Service Manual

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Cleaning and Servicing the Color Ink-Jet Print Head
Also the color ink-jet print head demands special care as far as nozzle cleaning is concerned.
Given their particular structure, dust or the drying-out of exposed ink can easily clog the nozzles.
Listed below are some useful tips that will guarantee the optimum use of the print head:
- Remove the print head from its sealed container only when you are about to install it in the printer. The
print head has an 18-month warranty if stored in its own sealed container, otherwise the warranty is reduced
to six months (both warranty periods are cumulative).
- Never rest the print head on its nozzle or electric contact sides. Never rest the print head on heat sources,
air conditioners, nor on dirty or dusty surfaces.
- After installing the new color print head, the printer will automatically run a nozzle bleed cycle and therefore
the nozzle cleaning procedure is not carried out on the color print head.
- After a print job, tightly seal the nozzle bay so the nozzles are protected against dust and to avoid the ink
from drying-out when exposed for a certain period of time.
Since on the JP 90 this operation is carried out automatically after a few seconds of printer inactivity, wait
a few seconds before powering off the machine after a print job.
If a line voltage failure occurs while the printer is on, power off the printer and manually push the print head
to its farthest right-hand position.
- Whenever removing the color print head from the printer, make sure to store it in the service container
supplied with the color kit. This will ensure that the ink on the print head does not dry-out.
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Fig. 1-9 Activation Sequence of the Heating Elements
HEATING ELEMENT COMMAND