Operating Principles Power-On Sequence 27
Epson WF-7520/7510/7010 series Revision A
Note *1: The PF motor drive is not transmitted to the Pickup Roller during this power-on sequence.
*2: The rotation directions of the PF Motor are as follows.
Clockwise: Paper is fed normally
Counterclockwise: Paper is fed backward
*3: The conditions of the CR lock are as follows.
Red CR lock is set
White CR lock is released
*4: The fatal error occurs if there is a problem such as the fuse blew.
*5: Confirm that the CR lock is not get stuck in the gap of the carriage or any other parts preventing the carriage from moving.
*6: Eject paper if any.
*7: Executed when the detected temperature is under 5
o
C (41
o
F) by the thermistor on the Printhead.
*8: The empty suction operation may occur depending on situations.
5. PF initialization
5-1.The PF Motor rotates clockwise for approximately one second.
5-2.The PE sensor detects if paper exists
*6
and the PF Motor rotates clockwise for approximately 0.5 second.
6. Low temperature operation sequence
*7
6-1.The carriage moves back and forth between the CR lock and the 130-digit side for two times.
7. PF measurement and PW sensor initialization
7-1.The carriage slowly moves to the 130-digit side.
7-2.The carriage moves to the VHCheck position quickly and stops; meanwhile the voltage values detected by the PW
sensor at the specified three points are recorded. At the same time, the PF Motor rotates clockwise and its load is
measured.
7-3.The carriage detects the voltage of the PW sensor at the carriage stop position (the black area at the Paper Guide
Front).
7-4.The carriage returns near its home position. At the same time, the PF Motor rotates clockwise and its load is
measured.
8. Detecting ink cartridge and initializing ink system
*8
8-1.After the carriage slightly moves to the 130-digit side and checks the ink end sensor, detects the ink remaining.
8-2.The carriage slowly returns to its home position.
8-3.The carriage slowly moves to the 0-digit side to the CR lock set position.
8-4.The PF Motor rotates counterclockwise and sets the CR lock.
8-5.The carriage slowly returns to its home position.
Table 2-6. Condition 1: Normal Power-on Sequence
*1
Operation
*2
Carriage/PF Roller
movement and
position
*3
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