22
en | Troubleshooting
UMS Series Public View System
F01U029703 | 1.0 | 2006.07
Installation Manual
Bosch Security Systems, Inc.
The following figure illustrates the option switches and their default settings:
Fig. 9.2
Option Switch Details
To verify the operation of the control board and to make any necessary adjustments to the
option switches, follow these steps:
1.
Manually unscrew the two (2) thumbscrews on the back of the unit. The control board
LED’s are located on the control board to the left of the camera. See
Figure 9.1
on page
21, numbers 1-3.
–
Verify that the
Camera On LED
is red when the camera input is selected and Off
when the auxiliary input is selected.
–
Verify that the
System Pulse LED
is red, signifying that the control board is run-
ning.
–
Verify that the
System
Power LED
is green, signifying that the UMS is ON.
2.
Verify the four (4) Option Switches are set to the default settings (see
Figure 9.2
on page
22 for details on the respective functions).
9.2
Screen flickers
The most likely cause of a flickering screen is a power supply problem. Ensure that there is
proper AC voltage to the monitor. Running wires long distances from the power supply may
cause undesirable voltage loss. For running power longer distances, it is recommended that
you use a heavier wire gauge. Refer to a copper wire table and line loss table for exact engi-
neering specifications.
Below is a table of maximum distances that the specified wire gauges can traverse with a 24 V
transformer:
#
Control
Default Setting
Function
1
Motion Switcher
ON
Enables motion switcher
OFF
Disables motion switcher
2
Not Used
ON
Not used
OFF Not
used
3
Synchronization Mode
ON
Sync to Aux video
OFF
Sync to line
4
Light Sensor
ON
Enables light sensor
OFF
Disables light sensor
Gauge
Distance
Gauge
Distance
20 AWG
40 ft
14 AWG
170 ft
18 AWG
70 ft
12 AWG
270 ft
16 AWG
100 ft
