Epson IEEE-488 User manual

R. ':l.
DOT MATRIX PRINTER
OPTION
user manual
EPSON
P8090019-4
Y490991040

NOTICE
*All rights reserved. Reproduction of any part of this manual in any form
whatsoever without EPSON's express written permission is forbidden.
* The contents
of this manual are subject to change without notice.
*All efforts have been made to ensure the accuracy of the contents of this manual.
However, should any errors be detected, EPSON would greatly appreciate being
informed of them .
*The above
notwithstanding, EPSON can assume no responsibility for any errors
in this
manual or their consequences.
© Copyright 1983 by EPSON CORPORATION
Nagano, Japan

TABLE OF CONTENTS
INTRODUCTION ... .................................................................................................. 1
INTERFACING WITH EPSON DOT MATRIX PRINTER.... .. .................................. 2
INSTALLATION ................. .. ................. .. ............................................................... 6
HARDWARE DESCRIPTION ...............................
.. ................ .. .. .. ........................ 18
PARTS LIST ............................................... .. ........................................................ 22

INTRODUCTION
The IEEE -488 Interface Board (Cat. No. 8161) allows IEEE-488 computers or
instruments* to produce printed output
on the EPSON FX, RX and MX series dot
matrix printers.
* I EEE -488 computers or instruments mean those which have been designed to
accommodate this standa rd .
This compact board provides a complete electronic link between any IEEE-488
computer or instrument and the EPSON dot matrix printer.
Using this IEEE-488 1/F Board, the EP SON dot matrix printer can be app li ed as:
• Peripheral printer for mini/micro computer systems.
• Hard copy output devi ce for inte lli gent data terminals.
• Forms generation for scientific and data communication systems.
IEEE- 488 computer or
instrum ent
Data & signals
-----l
.. ~~~ .--. I
...__ __ __, CN 1 1
IEEE-488 1/F
board
Signals,
I
I
I
I
I
I
Data & signalsl
I
I
I
I
I
Control circuit board I
I
: EPSON dot matrix printer
L- ____________ _j
Fig. 1 Block Diagram
- 1 -

INTERFACING WITH EPSON DOT MATRIX
PRINTER
1. IEEE-488 Connector
The IEEE -488 Interface Board (Cat. No . 8161) conforms. to all intents and
purposes, to the intent of the specification; however, it is specifically designed for
use
with the EPSON dot matrix printers. Table 1 lists the pin configuration of the
IEEE-488 mode of operation.
Table 1 Pin Configuration ofCN1
Pin No. Signal
Name
Description
1
DI01 Data Bit 1
2 DI02 D
9ta Bit 2
3 DI03 Data Bit 3
4 DI04 Data Bit 4
5
EOI End Or Id entify
6 DAV Data Valid
7 NRFD Not Ready For Data
8 NDAC Not Data Accepted
9
IFC
Interface Clear
10
SOR
Service Request
11
ATN Attention
12
FG Frame Ground
13 DI05 Data Bit 5
14 DI06 Data Bit 6
15 DI07 Data Bit 7
16 DI08 Data Bit 8
17
REN Remote Enable
18 GND Ground
19 GND Ground
20 GND Ground
21
GND Ground
22 GND Ground
23 GND Ground
24 GND Ground
-2-

60 mm typical
r Re c ept acle
-----+- - ---+-- - -- Body ·-
IL.....,...:::...._ -l
Plug
=
15mm
min .
Fig. 2 IEEE-Standard-488
2. 1/ F Board Connector
Table 2 Pin Configuration of CN2 (HKP-26MS)
Pin No . Signal Name Desc ript ion Pin No . Signal Name
Desc ription
1
ER R Error 13 R Reset
3
D7 Data Bit 7 15 D3 Data Bit 3
4 BUSY Busy 16
+5 + 5 Vo lt
5 06 Data Bit 6 17 D2 Data Bit 2
7 D5 Data Bit 5 19 D1 Data Bit 1
8 INT Initial
23 SLC TIN Se lect In
9 D4 Data Bit 4 24 GL Ground Logic
10 S TB St robe 25 IT R Interrupt
11 DB Data Bit 8 26 GL Ground Logic
~3-

3. Setting of DIP Switches
There are two DIP switches on the IEEE -488 1nterfac e Board (Cat. No . 8161}. The
methods of setting these sw itches are described below.
(1) DIP SW1
This switch is used to assign the printer (device} number.
The
"ON" po sition of each Dl P SW Pin corresponds to binary code "1 " and the
"OFF" position, binary code "0", respectively.
Address calculation formula:
Table 3 Setting of DIP SW2
SWPin
Function ON
OFF
Factory-set
No . condition
1-1 A, 1 0 OFF
1-2 Az 1 0 OFF
1- 3 A3 1 0
OFF
1-4
A4 1 0
OFF
1-5
As 1 0
OFF
1-6
unused - -
OFF
E xa mple: The following example shows how to set printer address " 6" .
z 1 2 3 4 5 6
3 0
DD
CJ)
ttD
DOD
0
20
21
22
23 24
\
'L
s
\\
c~
G>
--N
I ' \ -
'~2
I l
2. ·\ -
'2
I
o~·.r
-4-

{2) DIPSW2
When EPSON dot matrix printer is used in the IEEE-488 standard mode of
operation, this switch must be set as shown below. This is the factory-set
condition.
Table 4 Setting of DIP SW2
SW Pin No. Position
2-1
ON
2-2
OFF
2-3
OFF
2-4
OFF
NOTE:
If you set DIP SW2 to the opposite setting of that shown above, i.e.,
Pin No. 2-1 to
OFF and Pin Nos. 2-2 to 2-4 to ON, the IEEE-4881nterface Board can be used as an
exclusive interface board for PET computers.
-5-

INSTALLATION
1. Installing the Interface Board in FX Series Printer
To install the IEEE -488 Interface Board (Cat. No . 8161) in an FX Series printer,
observe the following procedure.
(1) Turn off the power switches of both the printer and the host computer.
NOTE:
Power should always be turned off when inserting or removing the interface
board. Removal or insertion of the interface board with the power turned on
could cause permanent damage to the board itself, as well as to the printer
and the host computer.
(2) Pull and remove the manual paper feed knob.
(3) Remove the four screws shown in Fig . 3.
EPSON
Fig.3 Removal of Upper Case (1)
-6-

(4) Lift the upper case of the printer, unplug the cable connector connecting the
control panel and the control circuit board from the control circuit board. (See
Fig. 4.)
(5) Remove the upper case and the shield cover. After the upper case has been
removed, four poles are visible at the inner rear left of the printer. (See Fig . 5.)
1111 II 111111 II II 1111 II 1111
Poles
Fig. 5 Internal View of Printer
-7-