Poor
Picture
Quality
Snowy Image (cont’d.)
Horizontal Scan Lines, Rolling Up or Down
Negative,
scrambled, or faded image
Noisy Power
Supply
Ground Looping on video cable
24V ac operation
Low voltage
Check connections. Relocate or replace power supply.
Check the coax cable shield is not touching ground, e.g. at couplings.
An electrically isolated circuit board or isolation transformer may be required.
Line Lock adjustment required.
Check voltage at input power cable. Must be >10.5V dc or >12V ac.
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