Table of Contents
Advertisement
:;0
(l)
<
SIGNAL
NAME
ACK
BELL
BUSY
CG1-CG7
CHADD7
CIP
CIPM
em
CLKTBI
CLKTB2
CSBSY
CSLF
DATA 1 -
DATA 8
APPENDIX A
SIGNAL GLOSSARY
This signal listing is keyed directly to the 306 printer schematic drawings.
All siqnal mnemonics contained on
those drawings are listed alphabetically with their source and destinations.
The following notation is used to identify the source and destination locations:
23-1/38-1 signifies element ME23,
pin 1 located on schematic 63060138, sheet 1.
SIGNAL
DESCRIPTION
SOURCE
DESTINATION
NAME
DESCRIPTION
SOURCE
Acknowledge - A 2.5-5.0 usec pulse
25-13/38-2
P4-Z/38-1
used to indicate completion of the
input of a character or end of a
DATA STROBE
A 1.0
usec (min.) pulsed used to
P4-Y/38-1
clock data from the input device
to the printer logic.
functional operation.
DCPRM
Decoded Prime - Prime corrmand
25-8/38-2
A 1 to 2-second pul se used to pro-
25-39/38-2
R27/38-1
duce an audi b 1 e tone in the opti ona 1
from LSI chip #1 to LSI chip #2
causes prime condition.
speaker located at the front of the
printer.
DCW1-DCWS
Five full step data write pulses
MEl6/38-2
from LSI chip #2 to ROM character
Status signal indicating to the input
25-11/38-2
20-1/38-1
generator.
device that the printer is not ready
to receive data.
DCWOl-DCW04
Four half step data write lines
ME16/38-2
to half-step ROM for 9 x 7 dot
Seven signal LINES from the char-
MEl & ME7/
P10-2, 3, 4,
matrix.
acter generators to the driver
38-4
6, 7, 8, 9/
board, which fire print wires 1-7.
38-1
DLF
Double Line Feed - Operator panel,
P3-20/38-1
double line feed switch option.
Character address 1 ine 7.
22-2/38-3
4-16/38-4
DLYLF
Delay Line Feed - A 90 ms pulse
32-5/38-1
Carriage in Print - Signal used to
26-11/38-3
2-9/06-2
drive the pri nt head forward.
fo 11 owi ng any paper movement
comnand.
Allows settle-out time
for the fonn feed mechanical parts.
Carriage in Print - Signal to Motor
21-8/38-1
26-2/38-3
Control Unit, is a comnand to
drive print head in forward di-
rection.
DLYSTB
Delay Strobe - A 500 us pulse used
28-5/38-1
to generate data write signals in
LSI chip #2 for the half step char-
acter generators.
Carriage in Print - Signal from LSI
16-30/38-2
21-11/38-1
chip 12, comnand to turn on forward
clutch.
DS1-DS8
Buffered input data 1 to 8.
ME24 & ME29/
38-1
Clock pulse used to clock input data
25-14/38-2
22-9/38-3
into memory reg i s ter .
Used for
loading data only.
DSCR
Decoded Carri age Return - Comnand
25-12/38-2
from LSI chip HI to LSI 12 to shift
data to memory output and backfill
shift register with zeroes.
Clock pulse used to shift memory.
16-36/38-2
22-3/38-3
Not used when loading data.
DSTA
Data Strobe A signal used to infonn
29-10/38-1
LSI chip HI that input data lines
Cause Busy - Corrmand from LSI chip 2
16-35/38-2
2S-10/38-2
should be strobed into memory.
to LSI chip 1 to cause a busy con-
dition, when durrmy character is de-
tected at memory output.
msw
End of Print Swtich - Tenninates a
P3-2/38-2
full 1 ine of print, 80 characters.
Cause Line Feed - Line feed corrrnand
25-6/38-2
32-3/38-1
FAULT
Printer fault signal to input
25-9/38-2
from LSI chi p #1.
connector.
The 8 input data lines coming from
P4-V, T, U,
the input device to the printer.
X. S, M, W,
FFH
Fonn Feed Hole - Vertical Fonnat
P3-V/38-2
Unit option, ChannelL
N/38-1
DESTINATION
16-31/38-2
ME4/38-4
ME10/38-4
E4/38-1
25-37/38-2
16-22/38-2
ME19 & MEl8/
38-3
16-33/38-2
25-20/38-2
16-19/38-2
P4-L/38-1
25-29/38-2
Advertisement
Table of Contents
