Epson SC-T7000 series Service Manual page 212

SC-T7000 series/SC-T5000 series/SC-T3000 series
Class Adjustment Items
The CR MOTOR is designed to stop when the
amount of heat generation (motor temperature)
during motor operation reaches a predetermined
limit. The amount of heat generation is estimated
CR Motor Measurement
based on the electrical characteristics of the
& Automatic
motor, which vary by motor and power supply of
Adjustment
the printer. Therefore, to get the motor control to
work properly, the electrical characteristics
values of the motor need to be measured and
stored in the memory on the MAIN BOARD.
Reduces misalignment of ink droplets fired to
Auto Uni-d adjustment
paper during unidirectional printing.
CR related
Auto Bi-D adjustment,
acceleration and
deceleration correction
PW + T&B&S check
and adjustment
ADJUSTMENT
Table 4-2. Adjustment Items
Overview
Auto Bi-d adjustment: Reduces misalignment
of ink droplets fired to paper during
bidirectional printing.
Acceleration and deceleration correction: To
improve print quality for bidirectional
printing, corrects the movement speed of the
CR UNIT.
PW: Checks that the PW sensor detects the
edges of paper correctly. Feed A4 matte paper
from the paper cassette and perform the
detection operation using the Service
Program.
T&B&S: Adjusts the print start position of the
top, bottom, right and left edges of paper.
Feed A4 matte paper from the paper cassette
and print the adjustment patterns using the
Service Program. Measure the adjustment
patterns then input the measurement result.
The print start position is automatically
adjusted.
Symptoms that the Adjustment is Needed
If this adjustment is not made, the estimation of
the motor temperature cannot be made properly
and may cause the following symptoms.
Even though there is no problem with the
motor temperature, the printer pauses during
printing because it judges that the motor is in
high-temperature state.
Despite the motor is in a high-temperature
state, a lower motor temperature is estimated
and the printer does not stop. This may cause
the printer to malfunction.
If this adjustment is not made, print quality
problems such as misaligned lines, grainy image,
banding may occur.
Auto Bi-d adjustment: If this adjustment is not
made, print quality problems such as
misaligned lines, grainy image, banding may
occur.
If this adjustment is not made, print quality
problems may occur.
If this adjustment is not made, the width or length
of paper cannot be detected correctly. As the
result, misaligned print position or insufficient
blank space may occur, or printed images may be
broken.
Overview
Service
Printer Mode Jig Media
Program
Normal
√
mode
Premium
Glossy
Normal
√
Photo
mode
Paper
(250)
Premium
Glossy
Normal
√
Photo
mode
Paper
(250)
Archival
Matte
Normal Paper/
√
mode Enhanced
Matte
Paper
Revision B
Page
p. 279
p. 241
p. 242
p. 243
212
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