AUTOHELM ST4000+ Service Manual

ST4000+ Autopilots
2 ST4000+ Autopilots Service Manual 83115-1
1.2 Disassembly/Assembly
1. Facia 2. Keypad 3. Label 4. Window insert 5. LCD surround 6. LCD 7. Elastomer strip (x2) 8. Diffuser 9. Reflector
D3721-1
2 17 (Note A)
1345
6 7 (x2) 8 (Note B) 9 10 12 (Note C)
11 (x3) 14 13 11 (x8)
10. PCB 11. Retaining screw (x11) 12. Case seal 13. Rear cover 14. Buzzer connector 15. Label 16. Bulkhead gasket 17. Keypad shim (earlier units only)
Notes: A. Earlier production units have a shim (17) fitted to aid keypad compression. B. The castellated top edge of the diffuser (8) fits under the legs of the LEDs on the top edge of the PCB (10). C. It is recommended that a new case seal (12) is fitted on assembly.
15
16
Figure 1: ST4000+ Control Head exploded view
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AUTOHELM ST4000+ Specifications

General

Type	Autopilot
Drive Type	Wheel Drive
Control Unit	ST4000+ Control Head
Power Supply	12 V DC
Interface	SeaTalk
Display Type	LCD
Control	Push-button
Voltage	12 V
Compass	Fluxgate Compass
Course Accuracy	±1°
Compass Safe Distance	1 meter