Memjet AS-1180C, Service Manual

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SECTION 5
MAINTENANCE
144
Printhead Storage & Shelf Life
Properly stored, unopened, Printhead Cartridges have a shelf life of up to 1 year.
Storage Temperature Range:
Long Term: 14° F to 86° F (-10
°
C to 30° C
)
Short Term: -11° F to 140° F (-25° C to 60° C)
NOTE: Cumulative storage duration above 86° F (30° C)
must not exceed 72 hours.
Humidity Range: 5% to 95% Relative Humidity, non-condensing
Atmospheric Pressure Range: 70 kPa to 106 kPa
Electrostatic Discharge:
8 kV air discharges or 4 kV contact discharges*
*When tested in accordance with IEC 61000-4-2
If you find it necessary to remove the printhead from the printer, for a few hours/days, it must be
properly protected and sealed; to help reduce damage, nozzle dehydration and clogging.
•
Follow the “Replacing the Printhead Cartridge” procedure to remove the Printhead Cartridge.
•
Install the protective cover on the printhead. Be careful to avoid ink spills (drips) and stains
during this process.
•
Store Printhead Cartridge in a sealed plastic bag, along with a cloth that has been dampened
with distilled water.
•
Re-install the “Cap Protectors” onto the Ink Revolver Couplings.
•
The Printhead should be re-installed as soon as possible. Please see the section titled
“Installing the Printhead Cartridge”.
CAUTION : Make sure the cartridges electrical contacts are dry before re-installing printhead.
Printhead Service Life
Manufacturer’s estimated rating: ~125,000 linear inches of continuous printing.
For example; if printing media that is 4.2” in length, at best print quality, with 100% ink coverage (each
nozzle firing at 1600 dpi down length of media); the printer is depositing 4.2 liner inches of print per piece.
At this rate, you can expect a yield of approximately 30,000 pieces before head replacement may be
needed.
If printing a typical logo (1” high) you can expect a yield of approximately 125,000 pieces before head
replacement may be needed.
NOTICE : Individual results will vary.
The estimations, provided above, are NOT an expression of Warranty. This information is being provided
for informational purposes only. The decision on when a printhead is no longer producing acceptable
output varies greatly from customer to customer; since this decision is based upon the customer’s
expectations (what they consider is or is not acceptable output).
Printhead degradation will depend on the make-up of the images printed, the operating environment,
servicing, media characteristics (
including cleanliness ) and other factors. The Printhead has a total of
70,400 nozzles (14,080 per color channel, 5 color channels). Since every print job is different, most do not
use the entire width of the Printhead nor do they require that every nozzle be fired. Therefore some nozzles
do not fire as often as others. The most often used nozzles will degrade more quickly. Noticing the effects
of failing nozzles depends partly on the relative position of those nozzles to each other.
Printhead Disposal
The Printhead Cartridge may be disposed of in a normal manner.
To help avoid ink spills; place the Printhead Cartridge back into its original packaging, before disposal.
Clean up spills with soap and water. Abrasive soap is effective in cleaning ink off your hands.