ST3000 Autopilot
4 ST3000 Autopilot Service Manual 83004-2
Chapter 3. Functional Test
Overall function
Change motor.
Restart.
Change faulty
item(s). Restart.
Connect actuator to
Control Head and apply
power to unit
Hold unit vertical.
Rotate it in clockwise
direction; check actuator
rotates anti-clockwise
(STBD set up) or
clockwise (PORT set up)
Check fluxgate
(SECT 5.6)
No
Yes
OK
Change PCB.
Restart.
Unit beeps, and shows 3000
and then displays a magnetic
heading, with flashing 'C'
Press & Hold +10 key.
Check motor runs.
OK
No
Yes
Press & Hold -10 key.
Check actuator runs.
Disconnect power and
remove drive module.
Disconnect motor spade
terminals and apply 10V DC
to motor terminals. Check
motor runs. (See Figure 3).
OK
Press AUTO and check
display shows 'A'
followed by a heading.
OK
Change PCB.
Restart.
OK
No
Yes
Change motor.
Restart.
No
Yes
OK
Hold unit vertical, rotate
it an anti-clockwise direction;
check actuator rotates
clockwise (STBD set up) or
anti-clockwise (PORT set up)
OK
Unit OK
No
Yes
No
Yes
OK
No
Yes
Change PCB.
Restart.
Change fluxgate.
Restart.
No
Yes
OK
Reverse 10V on motor.
Check motor runs.
Check motor connections
and wires.
OK
Change PCB.
Restart.
No
Yes
No
Yes
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