Epson SC-T3000, Service Manual

Page: 213 / 314

SC-T7000 series/SC-T5000 series/SC-T3000 series Revision B
ADJUSTMENT Overview 213
Confidential
CR related PG adjustment
Adjust the platen gap of the CR UNIT using the
thickness gauge.
When the PG is out of standards, the following
symptoms may occur.
†
Gap is too wide: Unstable ink droplet paths or
misaligned dots occur, and it causes low
printing quality such as banding, printing
misalignment, or grainy image.
†
Gap is too narrow: The head rubs paper.
Normal
mode
---
Thickness
gauge
p. 245
Head related
Tube inner pressure
reduction
Reduce the pressure in the ink flow paths. Doing this
prevents ink leakage that can occur when removing the
PRINT HEAD or other ink related parts/units. Removing a part or a unit which is needed to
reduce the pressure without reducing causes ink
leakage.
Normal
mode
√ p. 248
Head ID Input
Register the head rank ID to the printer using the
Service Program or check the currently registered
head rank ID. Head rank ID is information
needed to drive the PRINT HEAD with proper
voltages so that proper amount of ink droplets are
fired. The ID is assigned to each head and listed
on the label on the head.
If the new ID is not registered after replacing the
head, the head ID of the older head is used and the
proper drive voltage cannot be set. The following
symptoms may occur.
†
Since the amount of ink droplets is not proper,
the color and density abnormalities are found
on prints.
†
Since the amount of ink droplets turns to be
unstable, dot missing or misaligned dots occur
while printing or flushing.
Normal
mode
√
p. 249
Nozzle Check
Print the pattern on which the nozzle discharging
condition can be checked from the Service
Program.
When the Nozzle Check is not executed and the
nozzle is clogging, the following symptoms may
occur.
†
The adjustment pattern is not printed properly
and it causes a trouble for the automatic and
visual check/adjustment.
†
The automatic adjustments may fail or end
with an error.
Normal
mode
√
Premium
Glossy
Photo
Paper
(250)
p. 251
Cleaning
Specify the power and the color from the Service
Program and execute the head cleaning.
When the cleaning is not executed, the following
symptoms may occur.
†
Nozzle clogging is not solved and the printing
cannot be executed properly.
†
Ink droplets are not fired and nothing is printed
after the PRINT HEAD is replaced to a new
one. (Executing Initial ink charge may solve
this problem but it takes time and consumes
lots of ink.)
Normal
mode
√
p. 252
Table 4-2. Adjustment Items
Class Adjustment Items Overview Symptoms that the Adjustment is Needed Printer Mode
Service
Program
Jig Media Page