Bosch EX30 Installation Instructions Manual page 43

Horizontal
Scan Lines,
Rolling Up
or Down
Negative,
scrambled,
or faded
image
Ground
Looping on
video cable
Low voltage
- 43 -
connections.
Relocate or replace
the power supply.
Check the coax cable
shield is not touching
"ground", e.g. at the
couplings.
An electrically
isolated circuit board
or isolation
transformer may be
required.
Check voltage at
input power cable.
Must be >10.5VDC
or >12VAC.
Video leads
reversed
connection.