ACT apricot - Displayunitconnectordetail

CRT CONTROL
DISPLAY UNIT CONNECTOR DETAIL
The Display Unit connects to the System Board via the
9-pin male D-type connector located on the rear of the
System Unit. The mating connector from the Display Unit
is attached to a 6-wire cable assembly. The cable carries the
video signal, the horizontal and vertical sync pulses, and
also provides the + 12V supply voltage for the Display Unit.
The connections to the D-type connector are as detailed in
the table below.
Pin
Description
1 +12Vout
2
N.C.
3
OV
4
Horizontal Sync
5
Vertical Sync
6
Frame
Ground
7
N.C.
8
Ground
9
Video signal
Both
sync signals are at standard positive TTL levels. The
frequency of the Horizontal Sync pulses to match the
standard 9 inch Display Unit is 15.79 kHz; the frequency of
the Vertical Sync pulses, 72 Hz. The amplitude of the video
signal is fixed
at O.3V for normal intensity video, O.4V for
high intensity. The maximum current allowed to be drawn
from the + 12V supply is l.OA.