Adjustment Items - Epson SC-T7000 series Service Manual

SC-T7000 series/SC-T5000 series/SC-T3000 series

4.1.3 Adjustment Items

The following table describes the general outline of the adjustments.
Class Adjustment Items
CR Belt Tension Check
APG function check
CR related
Ink Mark Sensor check
& Auto Adjustment
CR Scale Check
CR Active Damper
Adjustment
(Automatic)
ADJUSTMENT
Overview
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.
Rotates the APG motor to change the PG, and see
if the PG is correctly set to its home position
(TYP).
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.
Checks the CR SCALE for any abnormality such
as damage or dirt and checks if the scale can be
properly read by the encoder.
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.
Table 4-2. Adjustment Items
Symptoms that the Adjustment is Needed
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.
When the PG is not switched properly responding
to the print setting, low image quality or CL
operation abnormality may occur.
If the IMS does not work properly, automatic
adjustments such as Auto Bi-D Adjustment cannot
be executed normally.
When the CR SCALE is not read properly, the
carriage will not operate normally.
Because the motor vibration/carriage vibration
cannot be reduced, vertical bands may appear on
prints.
Overview
Service
Printer Mode Jig Media
Program
Normal Tensimeter
√
mode U-507
Normal
√
mode
Premium
Glossy
Normal
√
Photo
mode
Paper
(250)
Normal
√
mode
Normal
√
mode
Revision B
Page
p. 234
p. 237
p. 238
p. 239
p. 240
211
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