Epson Stylus Pro 7700 Service Manual page 155

Epson Stylus Pro 7700/7710/7700M/7710M/7900/7910/9700/9710/9900/9910/WT7900/WT7910/9890/9908/7890/7908
Symptom Occurrence condition
Static electricity is generated. When the Release Film is
peeled off from the CPF
White ink is not ejected. When the white ink cartridge
has been stored with the
supply hole down for a long
time after the purchase
When the printer is left with
white ink filled in the head and
the nozzles of the head are
clogged
Troubleshooting when using cut sheets for Epson Stylus Pro WT7900/WT7910
Symptom Occurrence condition
Uneven Color at the bottom When printing on PGPP cut
sheets, color differs between
the regular print area and the
Approx.
print area processed for the
0.5 inch
bottom.
PF direction
TROUBLE SHOOTING
Cause
Static electricity is generated when peeling the Release Film
(polypropylene) from the clear film material (PET). Static electricity
may be charged and then discharged when multiple Release Films are
peeled off at a time.
Resin of white ink accumulates at the dimples of the supply hole and
blocks the hole.
• The printer was not turned off normally by pressing the Power
button. (Shut down by unplugging the power cord or by breaker.)
• Because the remaining amount of cleaning liquid (CL1) becomes
low, ink change was not executed and the printer was turned off
even the white ink remains filled.
• The power was turned off when an error was occurring.
Cause
When printing on PGPP cut sheets, the top and the regular print area
are printed with the lower nozzles (#1-#180) of the printhead, and the
area processed for the bottom is printed with the upper nozzles (#181-
#360). Color may differ due to the differences of the head alignment
and the ink weight.(Upper nozzles or lower nozzles cannot be selected
by users.)
Remedies for Print Quality Troubles
Remedy/Points to be checked
• Do not peel the Release Film near electronic devices.
• After peeling off the Release Film from large formatted
paper or multiple sheets, make sure to touch metal and
such to remove the static electricity completely.
When the white ink is not ejected, run a white Ink Refresh
twice. In addition, take care of the following when storing
the white ink cartridge for a long time or when not used soon
after the purchase.
• After the purchase, shake the box with the cartridge inside
for approximately 30 seconds (100 times) before storing
it.
• Store it horizontally. (Otherwise, sedimentation may not
be solved even after maintenance is performed.)
• Shake the box with the cartridge inside once in every six
months when storing it.
When the white ink is not ejected, run a white Ink Refresh
twice. In addition, take care of the following when storing
the white ink cartridge for a long time.
• Turn the power off with the Power button.
• Because error indications are not made when turning the
power off, if the printer will not be used for a long time,
first check the remaining amount of cleaning liquid (CL1)
before turning the printer off to make sure that the ink
change can be executed.
• Solve any error before turning the power off.
Remedy/Points to be checked
Print using roll paper.
Revision I
155
Confidential