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-

(6) Loosen the screw set in the FG (frame ground) pattern.
FG
Fig. 6 Loosening the Screws
(7) Connect one end of the Frame Ground wire (Round Chip) contained in the
shipping package of this interface
as an accessory to the frame ground
terminal. (See Fig . 7.)
Frame Ground Wire
Fig. 7 Connecting Frame Ground Wire
- 8 -

(8) Plug the connector of the IEEE-488 Interface Board (Cat. No. 8161) into the
mating connector
(CN2) on the control circuit board of the printer.
(9) Secure the 1/F Board on the four poles with the four mounting screws. (See
Fig . 8.)
Fig. 8 Mounting the IEEE-4881nterface Board
(1 0) Connect the Frame Ground wire (FASTON chip) to the FG terminal (TP1) of
the Interface Board (Cat. No. B161 ). (See Fig. 9.)
FG Terminal (TP1)
Fig. 9 Connection of FG Wire to FG Terminal
(11) Replace the upper case.
-9-

Two types of FX Series printer are available. One type incorporates a SUMI Board
for carriage control
and the other type, a Sl ave CPU 8042 for this purpose.
Both types
are fully compatible. Observe the following procedures to install the
IEEE -488 Interface Board in an FX Series printer incorporating a SUMI Board.
Remove the upper case
and the shie ld cover in the same manner as the FX Seri es
printer incorporating a Slave CPU 8042.
(1) Turn off the power switches. of both the printer and the host computer.
NOTE:
Power should a lw ays be turned off when inserting or removing the interface
board. Removal or insertion of the interface board with the power turned
on
cou ld 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.
(4) Lift the upper case of the printer, unplug the cab le connector connecting the
control panel and the cont rol circuit board from the control circuit board. (See
Fig. 4.)
(5) Remove the upper case and the shie ld cover. After the upper case has been
removed, four poles
are visible at the inner rear left of the printer. (See Fig. 5.)
- 10-

(6) Remove the three screws securing the SUMI Board as shown in Fig . 10 and
unplug the connector of SUMI Board into the mating connector (CN3) of the
control circuit board.
Three
Screws
Fig. 10 Three Screws Securing SUMI Board
(7) Loosen the screw set in the FG (frame ground) pattern.
FG
Fig. 11 Internal Vlew of Printer with SUMI Board Removed
- 11 -

(8) Connect one end of the frame ground wire (Round Chip) contained in the
shipping package of this interface as an accessory to the frame ground
terminal. (See Fig. 12.)
Fig. 12
(9) Remount the SUMI Board. (See Fig. 13.)
Fig. 13 Remounting the SUMI Board
- 12 -

(1 O) Plug the connector of the IEEE -488 Interface Board (Cat. No. 8161) into the
mating connector
(CN2) on the control circuit board of the printer.
(11) Secure the 1/F board on the four pol es with the four mounting screws. (See
Fig. 14.)
Fig. 14 Mounting the IEEE -4881nterface Board
(12) Connect the Frame Ground wire (FASTON ch ip) to the FG terminal (TP1) of
the Interface Board
(Cat. No. 8161 ). (See Fig. 15.)
FG Termin al (TP1)
Fig. 15 Connection of FG Wire to FG Terminal
(13) Replace the upper case.
-
13 -

2. Installing the Interface Board in RX. Series Printer
To in stall the IEEE-488 Interface Board (Cat. No. 8161) in the RX Series printer,
observe the following procedure.
(1) Turn off the power switches of both the printer and the host computer.
NOTE:
Power should a lw ays 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) Take off the upper case of the printer as follows. (Refer to the operation
manual of the RX series printer for details.)
1) Remove the two screws securing the upper case shown in Fig. 16.
2) Pull and remove the manual paper feed knob and the connector at the front
right corner of the upper case.
I
1 - ~ ·
f
\ ,
\ ~
Fig. 16 Locations of Upper Case Securing Screws
3) Take off the upper case and the shield cover. (See Fig. 17 .)
NOTE:
The rear of the upper case (where the parallel interface connector is
located) is secured with hooks instead of screws. Therefore, the upper
case may be removed easi ly by lifting the case from its front. After the
removal of the upper case, 3 poles are visible at the inner rear center of the
printer. -
14-

Poles
· Fig . 17 Removal of Shield Cover
(3) Plug the connector of the IEEE -488 Interface Board (Cat. No. 8161) into the
mating connector (CN3) on the control circuit board of the printer as shown in
Fig. 18 .
(4) Secure the 1/F board on the 3 poles with 3 mounting screws. (See Fig . 18 .)
IEEE-488 Interface
Board (Cat. No. 8161)
FG Terminal (TP1)
Fig. 18 Mounting IEEE-4881nterface Board
(5) Disconnect the Frame Ground wire from the control circuit board and connect
it to the FG terminal (TP1) of the 1/F board.
(6) Replace the upper case.
- 15-

3. Installing the Interface Board in MX Series Printer
To install the IEEE-488 Interface Board (Cat. No . 8161) in the MX Series printer,
observe the following procedure.
(1) Turn off the power switches of both the printer and the host computer.
NOTE:
Power should a lw ays be t.urned off when inserting or removing the interface
board. Removal or insertion of the interface board
with the power turned on
cou ld cause permanent damage to the board itself, as well as to the printer
and the host computer.
(2) Take off the upper case of the printer as follows. (Refer to the operation
manual of the applicable MX Series printer for details.)
1) Remove the 4 screws situated at the bottom of the l ower case. (With the
MX-1 00 printer, however, remove the five screws situated on the upper
case.)
2) Pull and remove the manual paper feed knob a nd the connector at the front
right corner of the upper case.
3) Take off the upper case and the shield cover.
After the removal of the upper case, four pol es are visible at the inner rear
center of the printer.
Fig. 19 Removal of Upper Case
-16-

(3) Plug the 1/F board connector into the mating connector on the control circuit
board of the printer as shown in Fig . 20 .
rame Ground Wire
Fig . 20 Installation of 1/F Board
(4) Put the 4 screws into the 4 poles and tighten them. (See Fig . 20 .)
(5) Disconnect the Frame Ground wire from the control circuit board and connect
it to the terminal TP1 of the 1/F board.
(6) Push the connector in at the front right corner and put on the upper case and
tighten 4 screws (or 5 screws for MX-1 00), then push the manual paper feed
knob
in.
-:- 17 -