Epson ActionLaser 1600, Руководство по обслуживанию

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Printer Features
Table 1-8. Parallel Interface Pin Assignments
Pin Signal
No. Name
I/O Description
1 STROBE IN STROBE is the pulse used to read data from the host
computer. Pulse width must be more than 0.5 µsec.
Normally it is HIGH, and data is latched at the trailing
edge of this signal.
2-9 DATA 1-8 IN DATA 1 to 8 are parallel data bits. When the signal is
HIGH, the data bit is 1, and when it is LOW, the data bit
is 0. The most significant bit (MSB) is DATA 8. The
signal state must be maintained for 0.5 µsec. on either
side of the STROBE signal’s active edge.
10 ACKNLG
OUT ACKNLG is the acknowledge pulse, with an approximate
width of 1 or 10 µsec. This signal goes LOW when data
reception is completed, indicating the printer can accept
new data. Timing with the BUSY signal is specified
through SelecType.
11 BUSY OUT The BUSY signal informs the host computer of the printer
state.
When the signal is HIGH, the printer cannot
accept data.
12 PE OUT PE indicates paper empty for the standard cassette,
selected by SelecType or command, or for the optional
paper cassette. Paper empty is indicated by HIGH.
13 SLCT OUT Pulled up to +5 V through a 1.0K-ohm resistor.
14 AUTO-FEED IN Not used.
15 NC
—
Not used.
16 GND
—
Logic ground level.
17 CHASSIS — Connected to the printer chassis. The printer chassis
GND
GND and the signal GND are connected to each other.
18 NC
—
Not connected.
19-30 GND
—
Ground level for the twisted pair return signal.
31 INIT IN The STROBE signal is ignored when this signal is LOW.
32
ERROR
OUT This level goes LOW when the printer is:
Ž out of paper
Ž paper jam
Ž in error state
Ž off line
33 GND
—
Same as for pins 19 to 30.
34 NC
—
Not used.
35 +5
—
Pulled up to +5 V through 1.0K-ohm resistance.
36
SLCT IN — Uses reverse mode
EPSON ActionLaser 1600 Service Manual 1-19