Sony 700TVL User Manual page 20

b. Please verify the camera rear panel, if the regulator
potentiometer is adjusted too large.
c. Check if the brightness of the monitor is too large.
8. Q: When installation, image is not clear or exist dark corners?
a. Please adjust focus and zoom of the lens. Make sure the
focus should be adjusted in a proper way.
b. Please check if the lens is clean.
20