Epson DFX-9000
Revision B
Operating Principles
Printer mechanism
67
Top of form sensor
The reflective Top of Form sensor (TOFS) attached to the Card guide
detects the presence of paper by receiving light reflected from paper.
The sensor also detects line feed position, i.e. the amount of line feed
after paper detection.
Top of paper eject sensor
The reflective Top of Paper Eject sensor (TPES) inside the Paper eject
unit detects the presence of paper in the same way as the TOFS. The
sensor also detects the top and bottom edges of paper when it is loaded.
Paper jam detection
Paper travel is detected by the magnet roller and the Hall IC (PJS)
located on the 1st Nip Roller. When the Hall IC detects an abnormal
rotation of the magnet roller, line feed and then printing stop, and the
control panel LCD displays the message:
Error:
Paper jam
Remove the jammed paper and press [PAUSE] to clear the error.
Figure 2-10. Paper detection 2
Card Guide
Carrier Unit
Carrier Unit
Card Guide
1st Nip roller
Reflective TOFS Sensor
Front Tractor
Continuous forms
fed on the Front
Paper Path
Continuous forms fed on
the Rear Paper Path
Rear Tractor
DV Roller F
Platen
Reflective TPES Sensor
Hall IC (PJS)
Reflective TOFS Sensor
Reflective TPES Sensor
Paper Eject Unit
Summary of Contents for DFX-9000
Page 1: ...EPSONDFX 9000 Serial Impact Dot Matrix Printer SEDM04003 SERVICE MANUAL ...
Page 8: ...C H A P T E R 1 PRODUCT DESCRIPTION ...
Page 61: ...Epson DFX 9000 Revision B Product Description Dimensions and weight 54 ...
Page 62: ...C H A P T E R 2 OPERATING PRINCIPLES ...
Page 99: ...Epson DFX 9000 Revision B Operating Principles Circuit operation 92 ...
Page 100: ...C H A P T E R 3 TROUBLESHOOTING ...
Page 104: ...Epson DFX 9000 Revision B Troubleshooting Overview 97 Mechanism initialization e e e e e ...
Page 107: ...Epson DFX 9000 Revision B Troubleshooting Overview 100 PAPER FEEDING FF APG APPROACH ...
Page 130: ...C H A P T E R 4 DISASSEMBLY AND ASSEMBLY ...
Page 218: ...C H A P T E R 5 ADJUSTMENT ...
Page 263: ...Epson DFX 9000 Revision B Adjustment Additional functions 256 ...
Page 264: ...C H A P T E R 6 MAINTENANCE ...
Page 286: ...C H A P T E R 7 APPENDIX ...
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Page 324: ...EPSON DFX 9000 Revision B Appendix Component Layout 317 7 4 Component Layout ...
Page 333: ...EPSON DFX 9000 Revision B Appendix Parts list 326 ...