Power-On Sequence - Epson WF-7620 Series Service Manual

Epson WF-7620 / WF-7610 / WF-7110 Series

1.2 Power-On Sequence

This section describes the power-on sequences for this product. The preconditions are as follows.
Normal power-on sequence (See
Turning on the printer after turning it off without an error.
Initial ink charge has finished and every cartridge has sufficient ink.
No paper on the paper path.
The Printhead is capped by the cap of the Ink System and the CR Lock is engaged normally.
1. Printhead initialization
1-1.Initializes the Printhead.
2. Checking for waste ink overflow
2-1.Checks the waste ink counter if the waste ink overflow is occurring.
3. Avoiding deadlock sequence
3-1.The CR Unit moves to the 0-digit side slowly and confirms it touches the Right Frame.
3-2.The CR Unit moves to the 80-digit side up to its home position.
3-3.The PF Motor rotates clockwise, and releases the CR lock.
4. Seeking the home position
4-1.The carriage moves to the 0-digit side slowly and confirms it touches the Right Frame.
4-2.By regarding the position where the CR Unit touches the Right Frame as the specified distance from the origin, the
home position is determined. Thereafter, the position of the CR Unit is monitored based on the information
provided by the CR Encoder.
4-3.The CR Unit slowly moves to its home position.
5. PF initialization
5-1.The CR Unit moves slowly about 3 cm to the 130-digit side.
5-2.The PF Roller rotates counterclockwise quickly.
5-3.The CR Unit moves to ASF trigger ON => OFF positions.
5-4.The PF Motor rotates clockwise for approx. one second.
5-5.The PF Roller rotates clockwise for about one second.
5-6.The PE sensor detects if paper exists and the PF Motor rotates clockwise for approx. 0.5 second.
Appendix
Table 1-1.)
Table 1-1. Normal Power-on Sequence
Operation
*3
*4
*1
CR Unit/PF Roller
movement and position
130
APG Lever
130
130
130
130
130
130
130
130
130
130
130
130
*5
130
Revision B
*2
HP 0
CR Unit
CR Lock
HP 0
HP 0
HP 0
HP 0
HP 0
HP 0
HP 0
HP 0
HP 0
HP 0
HP 0
HP 0
HP 0
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