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Operating Principles
Mechanism Operating Principles
2.2.4 Paper Feed Mechanism
The paper feed mechanism, consisting primarily of the PF Motor, PF Roller Assy and
Paper Eject Rollers (x2), transports the paper from the paper loading mechanism and
ejects it to the front.
2.2.4.1 PF Motor Specifications
Paper feed direction
2.2.4.2 PF Encoder
Detector specifications
Figure 2-14. Components of Paper Feed Mechanism
Item
Specifications
Type
DC brush motor
Voltage
42 V (DC voltage) ± 5% (voltage applied to the driver)
Characteristics
Armature
resistance
26.4
Ω
± 10%
Inductance
16.7mH (1KHz)
Inertia
12.4 gcm
2
Drive system
PWM system, constant-current chopping system
Paper Feed Direction
Direction of Motor Rotation
Current
Normal
CW
PF-A
→
PF-B
Reverse
CCW
PF-B
→
PF-A
Item
Specifications
Detection method
(SHARP GP1A038CKL)
Electrical
characteristics
Supply
voltage
3.3 VDC ± 5%
Current
16 mA (40 mA MAX) 120
Ω
Output waveform
Phase A and phase B 2-channel digital output (TTL)
Output level
“H” 2.4 V DC min.
“L” 0.4 V DC max
Resolution
1/180 pulse/inch
Signal detecting element
Photo interrupter
Duty ratio
50% ± 20%
Output phase difference
90° ± 54°
Frequency response
20kHz
PF Motor
Front Paper Eject Roller Shaft
Idle Roller Shaft Assy
Rear Paper Eject Roller Shaft
Upper Paper Guides
PF Encoder
PF Roller Holder Support Assy
CD-R Sensor 1
Detects the position (PG++) of the
Upper Paper Guides
PE Sensor
Detects the presence of paper.
EJ Frame Assy
PF Roller Assy
When the Upper Paper
Guides have been
located at the PG++
position, the actuator
moves and the sensor
detects the position.
Summary of Contents for Stylus Photo RX700 Series
Page 1: ...EPSON StylusPhotoRX700 Scanner Printer Copier SERVICE MANUAL ECOS SEMF05001 ...
Page 9: ...C H A P T E R 1 PRODUCTDESCRIPTION ...
Page 17: ...C H A P T E R 2 OPERATINGPRINCIPLES ...
Page 51: ...C H A P T E R 3 TROUBLESHOOTING ...
Page 76: ...C H A P T E R 4 DISASSEMBLYANDASSEMBLY ...
Page 133: ...C H A P T E R 5 ADJUSTMENT ...
Page 146: ...C H A P T E R 6 MAINTENANCE ...
Page 163: ...C H A P T E R 7 APPENDIX ...
Page 175: ...Model PM A900 Stylus PHOTO RX700 Board C583Main Sheet 1 3 Rev H ...
Page 176: ...Model PM A900 Stylus PHOTO RX700 Board C583Main Sheet 2 3 Rev H ...
Page 177: ...Model PM A900 Stylus PHOTO RX700 Board C583Main Sheet 3 3 Rev H ...
Page 178: ...Model PM A900 Stylus PHOTO RX700 Board C583 PNL PNL B Sheet 1 1 Rev C ...
Page 179: ...Model PM A900 Stylus PHOTO RX700 Board C583PSB Sheet 1 1 Rev H ...
Page 180: ...Model PM A900 Stylus PHOTO RX700 Board C583PSE Sheet 1 1 Rev F ...