Product Description
Service Manual
Table 1-13 shows the connector pin assignments and signal functions for the 8-bit parallel interface.
Table 1-13. Signal and Connector Pin Assignments for Parallel Interface
Pin No.
Signal Name
Description
STROBE
The STROBE pulse is used to read the input
1
19
In
data. The pulse width must be more than 0.5
Input data is latched after the falling edge of this
signal.
DATAO-DATA7
Parallel input data to the printer.
2-9
20-27
In
A HIGH level means data 1.
A LOW level means data O.
ACKNLG
This pulse indicates data has been received and
10
28
o u t
the printer is ready to accept more data. The
pulse width is approximately 12
11
BUSY
29
HIGH indicates the printer cannot
more
data.
12
‘
E
28
HIGH indicates paper-out. This signal is effective
only when the ERROR
is LOW.
13
SLCT
28
Always HIGH output. (Pulled up to +5 through
resistor.)
14
AFXT
30
In
Not used.
15,34
NC
.
—
Not connected.
16
—
—
Signal ground.
17
Chassis
—
—
Chassis ground.
18
LOGIC-H
—
o u t
Pulled up to +5 through 3.9K resistor.
19-30
.
—
Signal ground.
31
INIT
In
Input for printer initialization. Pulse width 50
minimum, active LOW.
32
ERROR
29
LOW indicates that some error has
in
the printer.
33
—
—
Signal ground.
35
—
o u t
Pulled up to +5 V through
resistor.
36
30
In
Not used.
//0 column indicates the direction of the signal as viewed from the printer.
1-12
Rev.
Summary of Contents for LQ-300 - Impact Printer
Page 1: ...EPSON TERMINAL PRINTER LQ 300 SERVICE MANUAL EPSON ...
Page 5: ...REVISION SHEET Revision Issue Date Revision Page Rev A September 28 1994 1st issue f v 1 ...
Page 34: ...c f ...
Page 101: ...Maintenance LQ 300 Service Manual Figure 6 1 LQ 300 Lubrication Points 6 2 Rev A ...
Page 110: ... Figure A 6 C130 PSB PSE Component Layout ...
Page 112: ...Appendix LC MMS vbeMantd Q ix iyii t v Figure A 8 LQ 300 Exploded Diagram 2 A 12 Rev A ...
Page 119: ... f ...
