Service manual

EPSON Stylus Photo R1900/R2880/R2000 Revision E
Operating Principles Motors & Sensors 32
Confidential
2.5 Motors & Sensors
 Motors
 Sensors
Figure 2-4. Motors and Sensors Layout
Table 2-5. List of Motors
Fig. Name Specific
A PF Motor
Type: DC Motor Drive voltage: 42VDC±5%
Armature resistance: 21.2 ±10%
B APG Motor
Type: DC Motor Drive voltage: 42VDC±5%
Armature resistance: 64.7 ±15%
C ASF Motor
Type: 4-phase 48-pole PM type stepping motor Drive voltage: 42VDC±5%
Winding resistance: 7.0 ±10% (per phase at 25°C)
DCR Motor
Type: DC Motor Drive voltage: 42VDC±5%
Armature resistance: 23.6 ±10%
EPump Motor
Type: 4-phase 48-pole PM type stepping motor Drive voltage: 42VDC±5%
Winding resistance: 10.3 ±10% (per phase at 25°C)
Table 2-6. List of Sensors
Fig. Name Specific
1 PF Encoder sensor Type: Rotary Encoder Drive voltage: 3.3VDC±5%
2 APG Sensor (1)
Type: Transmissive photo interrupter Drive voltage: 3.3VDC±5%
Sensor output:
• High: In the domain of each PG position
• Low: Between PG positions
3 APG Sensor (2)
Type: Transmissive photo interrupter Drive voltage: 3.3VDC
±5%
Sensor output:
• High: In the domain of large PG
• Low: In the domain of small PG
4 ASF Sensor
Type: Transmissive photo interrupter Drive voltage: 3.3VDC
±5%
Sensor output:
• High: Home position
• Low: Other than home position
5PE Sensor
Type: Transmissive photo interrupter Drive voltage: 3.3VDC
±5%
Sensor output:
• High (2.4V or more): No paper
• Low (0.4V or less): Paper exists
6 CR Encoder sensor Type: Linear Encoder Drive voltage: 3.3VDC
±5%
7 PW Sensor
Type: Reflective photo interrupter Drive voltage: 3.3VDC±5%
Sensor output:
• High: No paper
• Low: Paper exists
8 Ink Mark Sensor Type: Diffuse reflective photo interrupter Drive voltage: 3.3(5)VDC±5%
9CDR Sensor
Type: Mechanical contact Drive voltage: 3.3VDC±5%
Sensor output:
• High: CDR Tray Base open
• Low: CDR Tray Base closed
10
Cover Open
Sensor
Type: Mechanical contact Drive voltage: 3.3VDC±5%
Sensor output:
• High: Cover closed
• Low: Cover open
Table 2-6. List of Sensors
Fig. Name Specific
1
2
3
4
7
9
6
E
D
C
A
10
B
5
8