Epson SC-T3000, Service Manual

Page: 211 / 314

SC-T7000 series/SC-T5000 series/SC-T3000 series Revision B
ADJUSTMENT Overview 211
Confidential
4.1.3 Adjustment Items
The following table describes the general outline of the adjustments.
Table 4-2. Adjustment Items
Class Adjustment Items Overview Symptoms that the Adjustment is Needed Printer Mode
Service
Program
Jig Media Page
CR related
CR Belt Tension Check
Apply a specified tension to the CR TIMING
BELT. Measure the tension of the belt using the
sonic tensimeter to check if it is within standards.
If not, adjust the tension.
When the belt tension is out of standards, the
following symptoms may occur.
†
Belt tension is high: The life of the belt will be
shortened. High load applied to the carriage
causes frequent wait control over the carriage
movements to prevent overheating. If the
tension is too high, the shaft of the motor leans
and the brush in the motor becomes worn, and
will result in CR overload error.
†
Belt tension is low: The belt teeth slip and the
carriage swings. The correction by the active
damper does not work and the bands (vertical
bands) occur near the side edges of paper.
Normal
mode
√
Tensimeter
U-507
p. 234
APG function check
Rotates the APG motor to change the PG, and see
if the PG is correctly set to its home position
(TYP). When the PG is not switched properly responding
to the print setting, low image quality or CL
operation abnormality may occur.
Normal
mode
√
p. 237
Ink Mark Sensor check
& Auto Adjustment
†
Checks if the IM SENSOR has any trouble/
connection failure.
†
Executes IMS Position Auto Correction
(pattern detecting position correction).
Corrects the detecting position of the print
pattern in the sub scan direction and the main
scan direction.
†
Runs the nozzle check to check if the IM
SENSOR detects the nozzle clogging
properly.
If the IMS does not work properly, automatic
adjustments such as Auto Bi-D Adjustment cannot
be executed normally.
Normal
mode
√
Premium
Glossy
Photo
Paper
(250)
p. 238
CR Scale Check
Checks the CR SCALE for any abnormality such
as damage or dirt and checks if the scale can be
properly read by the encoder.
When the CR SCALE is not read properly, the
carriage will not operate normally. Normal
mode
√
p. 239
CR Active Damper
Adjustment
(Automatic)
Calibrates the active damper.
* Active damper is a function to reduce the
carriage vibration which causes vertical bands
on prints by outputting waveforms which have
phases opposite to the motor vibration.
Because the motor vibration/carriage vibration
cannot be reduced, vertical bands may appear on
prints.
Normal
mode
√
p. 240