Troubleshooting
Page 29 of 31
Doc No.: MAN01502, 27-02-01 SCA 300 Manual
SCA RECEPTACLE 3 - TO INDICATORS
Pin Code Description
from - to
1 SHLD SCA Chassis Ground to Cable Shielding.
2 +VDC Positive DC Supply (same as R6-P2) Wired thru SCA to
Indicators For Backlight Bulb.
3 +ROI SCA PCB Positive Rudder Order Indicator Signal to ROI.
4 +RAI SCA PCB Positive Rudder Angle Indicator Signal to RAI.
5 -RAI SCA PCB Negative Rudder Angle Indicator Signal to RAI.
6 -ROI SCA PCB Negative Rudder Order Indicator Signal to ROI.
7 +CRAI RFU 1300 in Stand Alone Mode (INT) Positive Rudder
Angle Indicator Signal Wired thru SCA to RAI.
8 -CRAI RFU 1300 in Stand Alone Mode (INT) Positive Rudder
Angle Indicator Signal Wired thru SCA to RAI.
9 GND Negative DC Supply (same as R6-P4) Wired thru SCA to
Indicators For Backlight.
SCA RECEPTACLE 4 - TO NFU LEVER AND NFU/FFU SWITCH
Pin Code Description
from - to
1 JSWCH SCA NFU/FFU Relay Coil to NFU/FFU Switch (Connect to
R4-P3 for FFU, Cut SCA Jumper and Leave Open for NFU)
2 +COMM SCA Positive Common (same as R6-P1) Wired thru SCA to
Supply Remote Switch Functions
3 -COMM SCA Negative Common (same as R6-P4) to Supply
Remote Switch Functions
4 NOT USED -
5 GND SCA Negative DC (same as R6-P4) Wired thru SCA to
Supply Remote Switch Functions
6 NOT USED -
7 PORT 4-Way Directional Solenoid Valve to NFU Jog Lever Port
Output
8 NOT USED -
9 STBD 4-Way Directional Solenoid Valve to NFU Jog Lever Stbd
Output
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