[DG] [DG11] Another Drivestop Question

[billgcroton]

Hello,

I have a 1986 sailboat with a:

--ST6000+ control head
--Type 100 Course computer
--Mechanical Linear Drive

The system has been very reliable since I got the boat 16 years ago, other than the need to replace the fluxgate compass a few years ago.

In Spring Commissioning this year I noticed that the system does not function properly:

When engaging the pilot, the pilot "grabs" the rudder/wheel and holds it in place but does not respond to course change input. Nor does the pilot steer the boat--it just holds the rudder in place.

After 1 or 2 min of sailing or motoring with Auto engaged, I get a DRIVESTOP message, but the pilot still holds the rudder. The control head has power and I double checked the seatalk cable between the control head and the course computer was well plugged into the back of the control head as well and the rudder sensor cable connection.

The rudder sensor appears to be fine, since I am getting accurate rudder angle indication on the control head while steering manually.

When I press STANDBY the pilot releases the rudder normally.

I know it's a really old system but would love to get a few more years out of it. Can you provide troubleshooting/repair suggestions?