Service manual

Epson Stylus Photo PX650/TX650/TX659/PX660/PX660 Premium/Artisan 635 Revision C
OPERATING PRINCIPLES Overview 36
Confidential
2.1.2 Motors and Sensors
Epson Stylus Photo PX650/TX650/TX659/PX660/PX660 Premiun/Artisan 635 are
equipped with the following printhead, motors and sensors.
Figure 2-2. Motors and Sensors (Printer Mechanism)
Table 2-1. Motors and Sensors (Printer Mechanism)
No. Name Function
1 Printhead F3-MACH Turbo 2 head (6 colors x 90 nozzles)
2 CR Motor
Type: DC motor
Voltage: 42V DC ± 5% (voltage applied to the driver)
Characteristics: Armature resistance : 22.7  ± 10%
Inductance : 17.5 mH ± 25%
Drive system: PWM constant-current chopping system
3PF Motor
Type: DC motor
Voltage: 42V DC ± 5% (voltage applied to the driver)
Characteristics: Armature resistance : 21.2  ± 10%
Inductance : 17.2 mH (1kHz)
Drive system: PWM system
4PE Sensor
Function: Detection of the paper tail end, Paper leading edge
positioning control
Detection method: Transmissive-type photo-interrupter
5 CR Contact Module Ink cartridge detection (CSIC)
6 CR Encoder
Type: Transmissive-type photo-interrupter
Resolution: 180 pulse/inch
7PF Encoder
Type: Transmissive-type photo-interrupter
Resolution: 180 pulse/inch
8 PW Sensor
Function • Paper left and right edge
(before and during printing)
• Paper top edge (before printing)
• Paper bottom edge (during printing)
• CD-R top, bottom, right and left edges
(before printing)
Detection method: Reflective photosensor
9 APG Sensor
Function: APG position detection
Detection method: Transmissive-type photo-interrupter
10 CD-R Guide Sensor
Function: CD-R Guide up/down detection
Detection method: Mechanical contact detector
11 CD-R Tray Sensor
Function: CD-R Tray presence detection
Detection method: Mechanical contact detector
12 Case Open Sensor
Function: Scanner Unit open/close detection
Detection method: Mechanical contact detector
PF Encoder
APG Sensor
CR Encoder
PW Sensor
CD-R Guide Sensor
CD-R Tray Sensor
PE Sensor
PF Motor
CR Motor
Case Open Sensor
CR Contact Module