TM 5-6350-275-24&P
Table 3-8. Closed Circuit TV DS Maintenance Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. CLOSED CIRCUIT TV MONITOR FAILURE (Figure 3-9)
Step 1. Check the LED power indicator on the front panel of the CCTV monitor. If the LED is on, turn the
brightness control knob fully clockwise.
If the monitor screen is still dark, replace the monitor (Para. 3-95).
If the screen shows a gray background, go to step 2.
If the LED power indicator is off, go to step 3.
Step 2. If the CCTV monitor is located next to other CCTV monitors, switch the video input cable with an
operational monitor. The monitor should display a picture.
If a picture is not displayed, replace the monitor (Para. 3-95).
If a picture is displayed, replace the video coaxial cable between the monitor and the switcher.
If the picture is still not displayed, go to troubleshooting steps for the video switcher (Table 3-8
Malfunction 2).
Step 3. Check the ac power cord to ensure the cable has not come loose from power source or out from the
monitor. If the ac power cord is connected to power source, go to step 4.
Step 4. Using a multimeter, check for 120 vac at the power source.
If 120 vac is present, replace the monitor (Para. 3-95).
If 120 vac is not present, notify facility engineers.
2. CANNOT SELECT CCTV MONITOR(S) FOR VISUAL DISPLAY VIA OPERATOR WORKSTATION (Figure 3-9)
Step 1. Swap the video input cable from a working monitor to the monitor that will not switch to another video
display.
If the monitor still does not display other video inputs, replace the monitor and repeat step (Para. 3-95)
If the monitor displays video, replace the coaxial cable between the monitor original input and the video
switcher.
If the monitor still does not display video, replace the video output card for that particular monitor (Para.
3-40
