Epson LX-300+II RTP Service Manual page 19

EPSON LX-300+II/300+II RTP/1170II

BUSY signal is active (HIGH level) under the conditions below:

In the process of receiving data

In the condition of being input buffer full

In the condition of being -INIT signal active (low level)

During hardware initialization

In the condition of being -ERROR or PE signal is active (low level, high level,
respectively)

In the self test mode

In the adjustment mode

In the default-setting mode

-ERROR signal is active (low level) under the conditions below:

In the condition of the printer hardware error (fatal error)

In the condition of a paper-out error

In the condition of a release lever error

PE signal is active (high level) under the condition below:

In the condition of a paper-out error
PRODUCT DESCRIPTION
Table 1-16. Connector Pin Assignment and Signals (Forward Channel)
Pin Signal Return
No. Name GND Pin
1 -STROBE
2 DATA1
3 DATA2
4 DATA3
5 DATA4
6 DATA5
7 DATA6
8 DATA7
9 DATA8
10 -ACKNLG
11 BUSY
12 PE
13 SLCT
14 -AFXT
31 -INIT
32 -ERROR
36 -SLIN
18 Logic H
35 +5V
17 Chassis
16,
33, GND
19-30
15, 34 NC
NOTE: In/Out shows the direction of signal flow as viewed from the printer.
Interface Specifications
In/Out Functional Description
Strobe pulse. Input data is latched at falling edge of the
19 In
signal.
20 In Parallel input data to the printer.
21 In
22 In
23 In
24 In
25 In
26 In
27 In
This signal (negative pulse) indicates that the printer has
28 Out
received data and is ready to accept next one.
This signal's high level means that the printer is not ready
29 Out
to accept data.
This signal's high level means that the printer is in a state of
28 Out
paper-out error.
28 Out Always at high level when the printer is powered on.
30 In Not used.
30 In This signal's negative pulse initializes printer.
This signal's low level means the printer is in a state of
29 Out
error.
30 In Not used.
-- Out This line is pulled up to +5V through 3.9 kΩ resister.
-- Out This line is pulled up tp +5V through 1.0 kΩ resister.
-- -- Chassis GND.
-- -- Signal GND.
-- -- Not connected.
Revision D
bit 0: LSB
bit 1
bit 2
bit 3
bit 4
bit 5
bit 6
bit 7: MSB
19