Product Description
Rev. A
1-33
1.4.2 Serial Interface
Synchronization
Asynchronous
Signal level
EIA-232D
MARK (logical 1):
-3 V to -25 V
SPACE (logical):
+3 V to +25 V
Word format
Start bit:
1 bit
Data bit:
8 bit
Parity bit:
Odd, Even or Non
Stop bit:
1 bit
Baud rate
300, 600, 1200, 2400, 4800, 9600 or 19200 bps
Handshaking
DTR signal and XON/XOFF
DTR = MARK, XOFF:
Indicates that the printer cannot receive data.
DTR = SPACE, XON:
Indicates that the printer is ready to receive data.
The DTR signal is MARK and XOFF code (DC3, 13H) is transmitted when the rest of
the input buffer becomes 256 byte. The DTR signal is SPACE and XON code (DC1,
11H) is transmitted when the rest of the input buffer becomes 256 byte.
Error handling
Parity error is detected only.
(Overrun error and framing error are ignored.)
Connector
25-pin sub-miniature D-shell connector. (female)
Table 1-27. Connector Pin Assignment for Serial Interface
Pin No.
Signal Name
I/O
Function Description
1
Chassis GND
Chassis GND
2
TXD
Out
Transmits data
3
RXD
In
Receives data
4
RTS
Out
Request to send. Always SPACE level
when the printer is powered on. Pulled
up to +12 V via 4.7 L ohm resistor.
7
Signal GND
Signal GND
11
REV
Out
Connected directly to the DTR signal.
20
DTR
Out
Data terminal ready
others
NC
Not used. Not connected.
Note: In and Out refers to the direction of the signal flow from the printer’s point of
view.
Summary of Contents for DLQ-3000+
Page 1: ...EPSON EPSON EPSON France S A SERVICE MANUAL DLQ 3000 PRODUIT ...
Page 2: ...EPSON 24 PIN DOT MATRIX PRINTER EPSON DLQ 3000 SERVICE MANUAL SEIKO EPSON CORPORATION 4008259 ...
Page 6: ...v REVISION SHEET Revision Issued Data Contents Rev A August 21 1997 First Release ...
Page 62: ...2 3 12 Other Sensor Circuits 2 30 ...
Page 160: ...Chapter 6 Maintenance 6 1 Maintenance 6 1 6 1 1 Lubrication and Adhesion 6 1 ...
Page 171: ...DLQ 3000 Rev A A 6 ...
Page 172: ...Appendix Rev A A 7 A 2 Circuit Diagrams Figure A 2 C210 MAIN Board Circuit Diagram 1 2 ...
Page 173: ...DLQ 3000 Rev A A 8 ...
Page 174: ...Appendix Rev A A 9 Figure A 3 C210 MAIN Board Circuit Diagram 2 2 ...
Page 175: ...DLQ 3000 Rev A A 10 ...
Page 177: ...DLQ 3000 Rev A A 12 Figure A 5 C124 PSB Board Circuit Diagram ...
Page 180: ...Appendix Rev A A 15 Figure A 8 C210 MAIN Board Component Layout 2 2 ...
Page 181: ...DLQ 3000 Rev A A 16 Figure A 9 C124 PSB Board Component Layout ...
Page 182: ...Appendix Rev A A 17 Figure A 10 C124 PSE Board Component Layout ...
Page 189: ...EPSON SEIKO EPSON CORPORATION ...
Page 254: ...PC 437 USA Europe standard Annexe A 27 ...
Page 255: ...PC 850 Multilingue PC 860 Portugais PC 863 Français canadien PC 865 Norvégien A 28 Annexe ...
Page 256: ...PC861 Islandais BRASCII Portugais brésilien Abicomp Portugais brésilien Annexe A 29 ...
Page 259: ...A 32 Annexe ...
Page 262: ...Utilisation du sommaire des commandes A 10 V Vitesse 2 25 W Windows Microsoft 1 17 18 Index 3 ...