Epson SC-T3000, Service Manual

Page: 215 / 314

SC-T7000 series/SC-T5000 series/SC-T3000 series Revision B
ADJUSTMENT Overview 215
Confidential
Ink supply
related
Ink eject Discharge ink from the printer.
If ink is not discharged when instructed to do so
before removing parts or units, ink may leak from
the printer and contaminate surroundings.
Serviceman
Mode
√
p. 259
Tube inner cleaning
Clean the ink flow paths to resolve the solidified
ink in the paths and clogging of nozzles of the
PRINT HEAD. Or, when leaving the printer
unused for a long period, doing this in advance
can prevent ink from getting solidified. Use the
Cleaning Cartridge for service and the Service
Program.
If the printer is left unused for a long period
without doing this after discharging ink, the ink
left in the ink flow paths may get solidified. Once
the ink becomes solidified, charging new ink may
become impossible or dot missing may occur.
Normal
mode
√
†
Cleaning
cartridge
†
Maintenance
Box
p. 260
Initial ink charge
Charge ink in the ink flow paths. Execute from
the Service Program.
If this is not executed after discharging ink, air
bubbles will remain in the ink tubes and may
cause dot missing.
Serviceman
Mode
√
p. 261
Main Unit
Measurement &
Automatic Adjustment
The pump cap 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
based on the electrical characteristics of the
motor, which vary by motor and power supply of
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.
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.
Normal
mode
√ p. 279
Media Feed
related
PF Belt Tension check
Apply a specified tension to the PF 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 PF
MOTOR causes frequent wait controls during
paper feeding 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 PF motor overload error.
†
Belt tension is low: The belt teeth slip and
paper cannot be fed properly.
Normal
mode
√
Tensimeter
U-507
p. 262
Table 4-2. Adjustment Items
Class Adjustment Items Overview Symptoms that the Adjustment is Needed Printer Mode
Service
Program
Jig Media Page