Adjusting the CE7000A Zoom Lens

The "Area of View" zoom lens is usually adjusted in conjunction with the size of the "Area of View" aperture. The lens may be positioned to each of the area of view settings by adjusting the 4-position selector. These stop positions are sensed electronically to assure the proper setting. The touch pad displays the currently selected area of view. The following information will show you how to adjust for each aperture size: 

Very Small Area View (VSAV) (First Stop)

To set the zoom lens to the "Very Small Area View" position (first stop), pull the selector knob towards the front of the instrument until the shaft and lens are extended to the maximum. Move the selector knob back gently until it is seated in the first stop. This stop may be very near the maximum position. You can be sure that the shaft is positioned in the first stop when the shaft feels as if it is locked into a groove and there is no forward or backward movement (play) when slight pressure is applied. 

Small Area View (SAV) (Second Stop) 

To set the zoom lens to the "Small Area View" position (second stop), set the selector knob to the "Very Small Area View" (first stop) position and then push the selector knob back one stop. You can be sure that the shaft is positioned in the second stop when the shaft feels as if it is locked into a groove and there is no forward or backward movement (play) when slight pressure is applied. 

Medium Area View (MAV) (Third Stop) 

To set the zoom lens to the "Medium Area View" position (third stop), set the selector knob to the "Very Small Area View" (first stop) position and then push the selector knob back two stops. You can be sure that the shaft is positioned in the third stop when the shaft feels as if it is locked into a groove and there is no forward or backward movement (play) when slight pressure is applied. 

Large Area View (LAV) (Fourth Stop) 

To set the zoom lens to the "Large Area View" position (fourth stop), set the selector knob to the "Very Small Area View" (first stop) position and then push the selector knob back three stops. You can be sure that the shaft is positioned in the fourth stop when the shaft cannot be pushed any further. When in this position, the selector knob and lens are inside the recessed area located in the rear transmission chamber wall.