Display User Manual
DDJ07310001
1-Oct-03
Page 7
2.5 Display Panels, GB8835-Rev4
The Display face consists of 8 rows by 15 columns of GB8835-Rev4 Display Boards. Each Board
consists of an 8 x 8 pixel matrix of ultra-bright red LEDs with each pixel consisting of 4 LEDs. This
results is an overall matrix of 64 high by 120 wide Display. The Boards are driven in a multiplex
mode with the row anodes connected to the horizontal drive and the column cathodes connected to
the vertical drive. The Boards contain the display driver circuitry, which generates the multiplexing
signals for illuminating the LEDs.
Data enters the Board via the Buffer Board (PAS186) on a 14-way screened Horizontal ribbon cable
via an IDC socket.
The 4-way Molex connector supplies 5 Volt Display Logic power and 15 Volt LED power to the
Board.
The Display Boards are fixed to stand-offs attached to the Display chassis using 4 off M6 screws.
Refer to the Figure below for Display Panel Wiring.
Figure 2.5 – Display Board Wiring.
Refer to dataflow diagram at the end of this Manual for further details.
14-way Horizontal
Ribbon Cable to next
Display Board up
12 core cable from
Interface Board
DC Power
Red = 5V DC
Black = GND
Blue = 15V DC
Brown = GND
