Heathkit H9 - READJUSTMENT; BRIGHTNESS; FOCUS; CENTERING

Parallel
Handshake
Timing
Pictorial
2-18
shows
the timing
waveforms
of the
handshake
signals
associated
with
the
parallel
I/O
port.
DAV0
TERM
I NAL
RDAVO
TXTTRNAL
DAVI
EXTERNAL
RDAVI
IERMINAL
SAYS ''ALL
DONT.
''
LOW LTVEL
SAYS
"DATA
READY FOR
EXIERNAL DEVICE.
Handshake Timing
LOW LEVFL
SAY S
'' I'VE GOT
I I.
"
LOW
LFVEL
SAYS
HAVE DAIA
FOR YOU.
''
_rlZl.susk_PULSE
SAYS "I'VE
TAKEN
THE
DATA."
-t--'---l
PICTORIAL 2.IB
Serial
I/O
Connections
The
following
serial I/O
connector
chart describes
the
signals
on each
pin
of the
serial I/O
connector
on the
rear panel.
PIN
#
SERIAL
PORT NOMENCLATURE
TTY
(ACTIVE
AND
PASSIVEI
EIA RS-232C
TTL
7
Serial Out
[+)
Serial
Out
2
Serial Out
(-)
Serial Out
3
Serial
In
(+)
Serial In
4
Serial
In
[-)
Serial In
5 Reader
Start
(+)
6 Reader
Start
(-)
Baud Rate
Out
Baud Rate
Out
Baud Rate
Out
B
9 Ground
Ground Ground
IITr
rvrusT
co
HrGH wtTHrN
r4us
OF TRAILING EDGE
OF PULSE
RDAV-o RESEIS
DATS