Epson SC-T7000 series Service Manual page 215

SC-T7000 series/SC-T5000 series/SC-T3000 series
Class Adjustment Items
Ink eject Discharge ink from the printer.
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
Tube inner cleaning 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.
Charge ink in the ink flow paths. Execute from
Ink supply Initial ink charge
the Service Program.
related
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
Main Unit
based on the electrical characteristics of the
Measurement &
motor, which vary by motor and power supply of
Automatic 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.
Apply a specified tension to the PF TIMING
Media Feed BELT. Measure the tension of the belt using the
PF Belt Tension check
related sonic tensimeter to check if it is within standards.
If not, adjust the tension.
ADJUSTMENT
Table 4-2. Adjustment Items
Overview Symptoms that the Adjustment is Needed
If ink is not discharged when instructed to do so
before removing parts or units, ink may leak from
the printer and contaminate surroundings.
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.
If this is not executed after discharging ink, air
bubbles will remain in the ink tubes and may
cause dot missing.
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.
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.
Overview
Service
Printer Mode Jig Media
Program
Serviceman
√
Mode
Cleaning
cartridge
Normal
√
mode Maintenance
Box
Serviceman
√
Mode
Normal
√
mode
Normal Tensimeter
√
mode U-507
Revision B
Page
p. 259
p. 260
p. 261
p. 279
p. 262
215
Confidential