Flash Technology
Revision A - 2/13/2020
23
PCB1 ROTARY DIALS CONTINUED…
The controller board also includes a rotary dial to perform a local mode override for each individual PC 270. This
mode override will timeout after 30 minutes, and returns to the mode communicated to it by the ground
controller (FTC 270). The local mode override also terminates if the PCB is power cycled or rebooted.
Dial Position
Mode
Details
0
AUTO
Follows the tower operating mode of the FTC 270
1
White Day
Flashes in last known White Day Mode configuration.
2
White Twilight
Flashes in the last known White Twilight Mode configuration.
3
Red Night
Flashes in the last known Red Night Mode configuration.
4
White Night
Flashes in the last known White Night Mode configuration.
5*
IR Only
Only flashes the Infrared LEDs at the configured flash rate. (10
hour duration)
6*
Sleep Mode
No LEDs flash. No alarm asserted. (10 hour duration)
7*
QLI Inhibit
Flash all LED strings (for the current mode) dimly and generates an
alarm (10 hour duration)
8*
QLI Inhibit – No Alarms
Flash all LED strings (for the current mode) dimly without asserting
an alarm (10 hour duration)
9*
Factory Test
Used for PCB Factory Test. Not for field use.
* Not intended for field use unless directed by Flash personnel
PCB2 DRIVER BOARD & PCB 3 CAPACITOR BOARD
The Driver assembly consists of PCB 2 & PCB 3 mounted together as set. There are three
sets of these assemblies within each
PC 270. Each assembly has the required circuitry to
drive 5 WHITE LED strings, one assembly for each LED Panel. The left most assembly is also
used to provide DC power to the Red and Infrared drivers on PCB1 (J2 of PCB3 connects to
J1 of PCB1).
PCB 4 POWER SUPPLY
The three power supplies (PCB 4) are located behind the bracket for PCB1. They accept
100-277 VAC 50/60Hz input power and supply 58VDC to PCB3 at J2.
