Epson Stylus Photo PX650 Service Manual page 40

Epson Stylus Photo PX650/TX650/TX659/PX660/PX660 Premium/Artisan 635
Table 2-3. Operation of the power-on sequence
*1
Operation
13-2.The carriage slowly moves to the 0-digit side.
13-3.The carriage moves to the 80-digit side to check
the ink end sensor. The ink remaining is detected
after completing the check.
13-4.The carriage slowly returns to its home position.
14.CR lock setting
14-1.The carriage slowly moves to the CR lock set
position.
14-2.The PF Motor rotates counterclockwise, and sets
the CR lock.
14-3.The carriage slowly returns to its home position.
Note *1: The rotation direction of the PF Motor is as follows.
Clockwise: Paper is fed normally
Counterclockwise: Paper is fed backward
*2: The condition of the CR lock is as follows.
Red: CR lock is set
White: CR lock is released
*3: Indicates the PG position. "Any position" means that the PG position is not
recognized because APG is not reset yet.
*4: Checks if the carriage is not deadlock such as the CR lock is caught in the gap of the carriage.
*5: Eject the paper if any.
*6: When paper exists, the existing measurement value saved in EEPROM is read out;
therefore, the PF Motor does not rotate.
*7: Executes when the detected temperature is under 5
*8: The empty suction operation may occur depending on the situation.
*9: If paper remains in the printer, the PF Roller rotates by steps enough to eject the paper forcibly.
OPERATING PRINCIPLES
Carriage/PF roller
*3
PG
*2
movement and position
PG--





o o
C (41 F) by the thermistor on the Printhead.
Printer Initialization
2.3 Printer Initialization
There are four kinds of initialization method, and the following explains each
initialization.
1. Hardware initialization
This printer is initialized when turning the printer power on, or printer recognized
the cold-reset command (remote RS command).
When printer is initialized, the following actions are performed.
(a) Initializes printer mechanism
(b) Clears input data buffer
(c) Clears print buffer
(d) Sets default values
2. Operator initialization
Initialization when resetting the USB software, and the following are performed.
(a) Clears input data buffer
(b) Clears print buffer
(c) Sets default values
3. Software initialization
The ESC@ command also initialize the printer.
When printer is initialized, the following actions are performed.
(a) Clears print buffer
(b) Sets default values
4. IEEE 1284.4 "rs" command initialization
The printer recognized the IEEE 1284.4 "rs" command.
When printer is initialized, the following action is performed.

Initialization when an error occurs.
(a) Initializes printer mechanism
(b) Clears input data buffer
(c) Clears print buffer
(d) Sets default values

Initialization in normal operation
(a) Clears input data buffer
(b) Clears print buffer
(c) Sets default values
Revision C
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