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20 en | Technical Information Corner-mount No-grip Camera
F.01U.172.707 | 3.0 | 2011.02 Instruction Manual Bosch Security Systems, Inc.
4.2 Troubleshooting - LEDs
Horizontal scan lines,
rolling up or down
Ground looping
on video cable
Check the coax cable shield is
not touching ground (for
example, at couplings).
Reversed video or
faded image
Low voltage Check voltage at input power
cable. Must be >10.5 VDC or
>12 VAC for camera section.
Check video leads for reversed
connections.
PROBLEM POSSIBLE CAUSE POSSIBLE SOLUTION
PROBLEM POSSIBLE SOLUTION
Fuse blows – Check fuse rating.
– Check for shorting between the
enclosure and the input power.
Unsure if LEDs are “On” 850nm LEDs will have a faint red glow when
“On”. 940nm LEDs are covert. Aim the LEDs
directly at an IR-sensitive camera to see the
lights or wait for the LEDs to warm up (two
minutes).