Epson DFX-9000
Revision B
Product Description
Basic specifications
30
1.2.8.4 USB Interface
Specifications
Universal Serial Bus Specifications Revision 1.1
Universal Serial Bus Device Class Definition for Printing Devices
Version 1.1
Bit rate:
12 Mbps (Full Speed Device)
Data encording:
NRZI
Connector:
USB Series B
Max. cable length:
2 meters
Connector pin assignment and signals:
Figure 1-20. USB interface connector pin assignment
The USB responds to a BULK OUT transaction with a NAK handshake
and other transactions with ACK under the following conditions:
In SelecType mode
During a cover open error
During a paper jam error
During a ribbon jam error
During a ribbon out error
During a paper-out error
During an incomplete paper change error
The USB responds to a BULK OUT transaction with NAK and BULK
IN transaction with NAK under the following conditions:
When the input buffer is full
During hardware initialization
In the self test mode
In the adjustment mode
When there is a printer hardware error (fatal error), the USB responds to
a BULK OUT or BULK IN transaction with STALL.
Table 1-23. Connector pin assignment
Pin
No.
Signal
name
In/Out
Function description
1
VCC
-
This line is for cable power.
Maximum power consumption is
100 mA.
2
–Data
Bi-directional
This line is for data.
3
+Data
Bi-directional
This line is for data and is pulled
up to +3.3 V via a 1.5 k
Ω
resistor.
4
Ground
-
This line is for cable ground.
Pin #2
Pin #4
Pin #3
Pin #1
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 ...