Bosch VG4-200 - Manual (Page 55)

AutoDome Modular Camera System Troubleshooting Guide | en 51
Bosch Security Systems, Inc. VG4-200, VG4-300, VG4-500i Series User’s Manual F01U064036 | 1.0 | 2007.01
Picture is dark 1. Check that the Gain Control is set to AUTO (ON-43-ENTER).
If O.K., then:
2. Check that the Auto Iris Level is set to the appropriate level (ON-11-ENTER).
If O.K., then:
3. Check that the video coax is terminated with 75 Ω only at the head end. (Double termi-
nation causes dark video.)
If O.K., then:
4. Go to the Camera Setup Menu and increase the Pre-Compensation setting. (This fea-
ture is available only on 300 and 500i non-IP Series AutoDomes).
If O.K., then:
5. Check that the camera lens cover is removed.
If O.K., then:
6. Check that the maximum coax distance has not been exceeded. See the AutoDome Mod-
ular Camera System Installation Manual.
If O.K., then:
7. Restore all camera settings (ON-40-ENTER).
Colors are not cor-
rect 1. Reset the White Balance to the appropriate selection (ON-30-ENTER).
If O.K., then:
2. Go to the Camera Setup Menu and increase the Pre-Compensation setting. (This fea-
ture is available only on 300 and 500i non-IP Series AutoDomes).
If O.K., then:
3. Check that the maximum coax distance has not been exceeded. See the AutoDome Mod-
ular Camera System Installation Manual.
If O.K., then:
4. Restore the default settings (ON-40-ENTER).
Background is too
bright to see subject X Turn on backlight compensation (ON-20-ENTER).
Video is rolling, noisy
or distorted 1. Ensure that the Synch Mode is set to Internal (OFF-42-ENTER).
If O.K., then:
2. Check that the maximum coax distance has not been exceeded. See the AutoDome Mod-
ular Camera System Installation Manual.
If O.K., then:
3. Check the integrity of all BNC connectors and splices.
Note: Connecting a network cable to the interface board of a non-IP AutoDome causes
video distortion.
4. Remove the network cable from the interface board RJ-45 connector.
If O.K., then:
5. Contact Bosch Technical Support.