The Nikon N75 (known as the F75 outside of North America) is a 35 mm SLR camera designed for beginning and intermediate photographers. You can diagnose many of the problems you may encounter while using the Nikon N75 by examining the LCD display and viewfinder. The camera will display special icons in one or both locations, and the type or combination of icons should help you identify what's wrong.
Battery
If you see a partially filled battery icon in your LCD and viewfinder, the camera's batteries are nearing the end of their charge; if the icon begins blinking, battery depletion is imminent, and you should install replacements. Sometimes, the batteries may run out of power while you are rewinding the film; the camera will alert you to this by displaying the battery icon in the LCD and a film canister icon in the viewfinder.
Film
An "E" or "Err" icon in the LCD display combined with a film canister icon in the viewfinder suggests an improperly installed film canister. Open the camera back by sliding the locking lever on the side of the camera. Remove the film canister and reinsert it, bottom end first. Pull out the film leader until it reaches the red index marking on the bottom-right corner of the film bay. Close the camera, taking care to ensure that the film strip doesn't have excess slack.
Focus
A blinking circle in the camera's viewfinder indicates that the camera's autofocus will not work under the current conditions; in this situation, you must adjust the focus manually. Set the focus mode selector (located next to the camera lens) to "M" and examine your subject through the camera's viewfinder. Adjust the focusing ring (located at the end of the camera lens) by turning it in either direction until your image comes into focus.
Exposure
A "HI" or "LO" in the camera's LCD and viewfinder means that your subject is too bright or too dark, respectively. Compensate for this by adjusting either the camera's shutter speed or its aperture size. To adjust the shutter speed, turn the mode dial to "S" and use the dial below the LCD display to set the speed. Use a faster speed for bright subjects and a slower speed for dark subjects. To adjust the aperture size, turn the mode dial to "A" and use the dial below the LCD display to set the size. Choose a larger number (which correlates to a smaller aperture size) for bright subjects and a smaller one (larger aperture size) for dark subjects.
Tags: aperture size, film canister, camera viewfinder, battery icon, below display