[CA] [CA11] Smart Pilot melted 2A fuse, blown board

[Chuck - Raymarine - Moderator]

Rick,

To test the autopilot control head, simply connect one end of a SeaTalk cable to a 12 VDC circuit which has been protected with a 5A fuse. Verify that the autopilot control head powers up. If not, it has suffered a failure and will need to be replaced (ST6xxx/ST7xxx/ST8xxx autopilot control heads can no longer be serviced). Should the autopilot control head power up, then use an analog voltmeter to measure voltage across data (yellow) and ground (shield) SeaTalk leads. Again, as the buttons are pressed, you should see a change in the measured voltage to then see similar pulsing of the meter's needle in the voltage range specified within my last response. Should such pulsing not be observed, then the autopilot control head would be deemed to have suffered a failure and will need to be replaced. ST6xxx/ST7xxx/ST8xxx autopilot control heads which are interfaced to a S1/S1G/S2/S2G/S3/S3G/150/400 autopilot course computer may be replaced with your choice of a currently manufactured p70S or p70RS autopilot control head.