Epson DFX-9000
Revision B
Product Description
Basic specifications
24
1.2.8 Interfaces
This printer provides 4 interfaces as standard: bi-directional 8-bit
parallel, serial, USB, and a Type-B optional interface slot.
1.2.8.1 Parallel interface (forward channel)
Transmission mode:
8 bit parallel, IEEE-1284 compatibility mode
Adaptable connector:
57-30360 (Amphenol) or equivalent
Synchronization:
-STROBE pulse
Handshaking:
BUSY and -ACKNLG signals
Signal level:
TTL compatible (IEEE-1284 level 1 device)
* Active-High signals are 2.0 V or lower when the printer is off and 3.0
V or higher when the printer is on. The receiver has an impedance
equivalent to 7.5 k
Ω
.
Data transmission timing
Figure 1-19. Data transmission timing
Notes: 1. Rise and fall time of output signals
2. Rise and fall time of input signals
Table 1-18. Parameters
Parameter
Minimum
Maximum
Condition
V
OH
*
-
5.5 V
-
V
OL
*
-0.5 V
-
-
I
OH
*
-
0.32 mA
V
OH
= 2.4 V
I
OL
*
-
12 mA
V
OL
= 0.4 V
C
O
-
50 pF
-
V
IH
-
2.0 V
-
V
IL
0.8 V
-
-
I
IH
-
0.32 mA
V
OL
= 0.4 V
I
IL
-
12 mA
V
IL
= 0.8 V
C
I
-
50 pF
-
Table 1-19. Parameters
Parameter
Minimum
Maximum
t
setup
500 nsec
-
t
hold
500 nsec
-
t
stb
500 nsec
-
t
ready
0
-
t
busy
-
500 nsec
t
reply
-
-
t
ack
500 nsec
10 µs
t
nbusy
0
-
t
next
0
-
t
tout
1
-
120 nsec
t
tin
2
-
200 nsec
DATA
-STROBE
BUSY
-ACKNLG
Data byte n
t
hold
t
stb
t
setup
t
ready
t
busy
t
reply
t
ack
t
nbusy
t
next
Data byte n+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 ...