Epson Stylus Photo R280 Service Manual page 27

Epson Stylus Photo R280/R285/R290/Epson Artisan 50/Epson Stylus Photo T50/T59/T60/P50
Table 2-5. Operation of the power-on sequence
Operation *1
6-2.The PF Motor rotates clockwise while monitoring
the PG sensor.
6-3.After the PG sensor switched from Off to On, the
PF Motor rotates clockwise by the specified step
until it detects the PG-- (APG home position).
6-4. After detecting the APG home position, the carriage
slightly moves to the 80-digit side.
6-5. After the PF Motor rotates counterclockwise by the
specified step, it rotates clockwise to confirm the PG
sensor is set to On-state.
6-6.The carriage slowly returns to its home position.
7. Setting the APG to PG++
7-1.The carriage slowly moves to the Right Frame and
stops there.
7-2.The PF Motor rotates clockwise and sets to PG++.
7-3.The carriage slowly returns to its home position.
8. PF initialization
8-1.Checks if paper exists by the PE sensor
PF Motor rotates clockwise for one second.
9. PF Motor measurement
9-1.The PF motor rotates clockwise for four seconds,
and performs a load measurement. *6
10.Low temperature operation sequence
10-1.The PF Motor rotates clockwise, and releases the
CR lock.
10-2.The carriage moves back and forth between CR
lock and the 80-digit side for two times.
Chapter 2 Operating Principles
Carriage/PF roller
*2
movement and position
*5 and the
*7
2.3 Power-On Sequence
Table 2-5. Operation of the power-on sequence
PG *3 Operation
11.Setting the APG to PG--
Any
11-1.The carriage slowly moves to the Right Frame
position
and stops there.
11-2.The PF Motor rotates clockwise and sets to PG--.
↓
11-3.The carriage slowly returns to its home position.
↓
12.CR measurement and PW sensor initialization
PG--
12-1.The PF Motor rotates clockwise, and releases the
CR lock.
12-2.The carriage slowly moves to the 80-digit side.
↓
12-3.The carriage performs a load measurement while
↓
moving to the VHCheck position, and records the
detected voltage of the PW sensor at the specified
three positions, then stops.
PG++
12-4.The carriage detects the voltage of the PW sensor
at the carriage stop position (the black area at the
Paper Guide Front).
↓
12-5.The carriage performs a load measurement while
moving to the 0-digit side, and stops.
↓
12-6.The carriage performs a load measurement while
moving to the VHCheck position, and records the
detected voltage of the PW sensor at the specified
three positions, then stops.
↓
12-7.The carriage detects the voltage of the PW sensor
at the carriage stop position (the black area at the
Paper Guide Front).
↓
12-8.The carriage performs a load measurement while
moving to the 0-digit side, and stops.
↓
Carriage/PF roller
*1
movement and position
(Continue to the next page)
Revision C
PG *3
*2
↓
PG--
↓
↓
↓
↓
↓
↓
↓
↓
↓
27
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