Epson DFX-9000
Revision B
Product Description
Basic specifications
38
1.2.8.9 IEEE 1284.4 protocol
The packet protocol described by IEEE 1284.4 is supported on the
parallel I/F and the USB I/F. Two modes of the IEEE 1284.4 protocol,
“Off” and “Auto”, are available, and are selected through SelecType.
Refer to
1.3.3 SelecType functions setting (p.46)
.
The packet protocol options “Off” and “Auto” in SelecType mode are
effective for both parallel and USB I/F.
Auto:
Communication is carried out in the conventional mode until
a magic string (1284.4 synchronous commands) is received.
Once a magic string is received, communication in IEEE
1284.4 packet mode starts.
Off:
Communication is carried out in the conventional mode.
When printing from a Windows-based printer driver, set the packet
protocol to “Auto”.
The functionality of the “Off” mode in IEEE 1284.4 protocol is not
guaranteed on the USB I/F.
NOTE:
The packet protocol of IEEE 1284.4 allows a device to carry
on multiple exchanges or conversations that contain data
and/or control information with another device at the same
time across a single point-to-point link. However, the
protocol is not a device control language. It does provide
basic transport-level flow control and multiplexing services.
The multiplexed logical channels are independent of each
other and the blocking of one has no effect on the others.
The protocol operates over IEEE 1284.
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 ...