Chapter 3
Theory of Operation
P/N 79000035_SM, Version 1.5 3 - 21 Focus 30/35 Service Manual
Functional description
The Tilt sensor generates tilt information in X and Y direction.
• Circular vessel filled with silicon oil.
• Optics to collimate light beam inside the oil and focusing the light source onto the image sensor.
• Point LED and CMOS area sensor.
• Electronic board for calculation and communication to MCB board.
The Coarse tilt sensor generates tilt information in X and Y direction.
• Coarse tilt sensor as Electronic component on SCH board.
Block diagram
Fig. 3-19 Tilt sensor in zero position
Vertical axis of instrument
Electronic board
Area sensor
Point LED
Silicon oil
Vessel
Optics
Prism
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