Service manual

Epson Stylus Photo PX650/TX650/TX659/PX660/PX660 Premium/Artisan 635 Revision C
OPERATING PRINCIPLES Overview 37
Confidential
Figure 2-3. Motors and Sensors (Scanner Unit)
2.1.3 Printhead
F3 Mach Turbo2 head type printhead is employed, which produces variable sized dot
and economy dot. The printhead configuration is as follows.
 Nozzle configuration
 Black: 90 nozzles x 1
 Color: 90 nozzles x 5 (yellow, light magenta, light cyan, cyan, magenta)
The nozzle layout as seen from behind the printhead is shown below.
Figure 2-4. Nozzle Layout.
Table 2-2. Scanner Mechanism CIS & Motor
No. Name Function
1CIS Unit
Resolution: 10,200 pixel
16 bit per pixel (input), 8 bit per pixel (output)
2 CR Motor
Type: DC motor
Voltage: 42V DC ± 5% (voltage applied to the driver)
Drive system: VrefPWM input constant-current chopping
3 Encoder sensor
Type: Linear encoder
Resolution 180 pulse/inch
CR Encoder
CR Motor
CIS Unit
A#3
A#2
A#1
(1) = 0.846 mm (24/720 inch)
(2) = 6.209 mm (176/720 inch)
A#90
A#89
A#88
B#3
B#2
B#1
B#90
B#89
B#88
C#3
C#2
C#1
C#90
C#89
C#88
D#3
D#2
D#1
D#90
D#89
D#88
Carriage moving direction
Paper feeding direction
0.282 mm
(1/90 inch)
0.141 mm
(1/180 inch)
(1)
(1) (1)
(2)
(2)
22.81 mm
E#90
E#89
E#88
F#90
F#89
F#88
E#3
E#2
E#1
F#3
F#2
F#1
Color Assignment
A: Black
B: Yellow
C: Light magenta
D: Light cyan
E: Cyan
F: Magenta
ACDBEF
14.95 mm