For all SRS 4000 series video door entry fault finding please use the SRS audio fault finding guide. Only problems associated with the video picture and calling of the monitor will be handled here.
No Call at the monitor
  1. The call tone is generated in the 9307.1 power supply (formerly the 9007).
  2. The tone comes out of the C (for call tone) terminal
  3. From here it is connected to the C1 terminal on the 9008V2 and emerges from the C2 terminal.
    • The call tone is taken via the 9008V2, so that it can 'sense' the call tone being used.
  4. The tone then continues is path to the call button, then up to C7 at the video monitor.
  5. Only check the tone is present using a monitor. Connect it close to the source of the signal if the tone is not heard (to check your euipment)
  6. You should read about 4.5V between the call signal and 0V. This does not mean the tone itself is present, just that the tone DC carrier is present.
  7. The return path (to complete the circuit) is via terminal 6 on the monitor which is connected to 0V on the 9307.1 power supply.
Monitor does not light up
  1. In order for the monitor screen to light up two things must happen
    • The monitor must be called
    • The monitor must receive 18V DC
  2. Firstly check that the monitor is being called and that the voltage of the call signal is 4.5V (or greater). See No Call at the monitor above
  3. Check that the monitor is receiving 18V DC after a call is made
    • AV1423 monitor (terminals - & 3)
    • AN7270S monitor (terminal R1 & R2)
  4. If there is not 18V getting to the monitor
    1. If no voltage arriving
      1. Check that the 9008V2 is providing 18V DC (terminals R1 & R2) when the monitor has been called. The R2 LED should light up. This voltage is available for as long as the timer is set. Adjust the small potentiometer on 9008V2
      2. If no voltage from 9008V2, remove R2 wire and check again by calling the monitor. 0V means the 9008V2 is damaged.
    2. If less than 18V is getting to the monitor (say in the range of 12 - 15V) then the problem is likely to be the thickness of the R1 & R2 cables. Make sure the cables are AT LEAST 1mm diameter, even on a short run. Refer to the diagram for correct cable diameter.
Monitor lights up, but no picture
  1. Check No Call at the monitor above
  2. Check Monitor does not light up above
  3. Connect the camera coax directly to ONE monitor
  4. Check 12V DC camera power at the camera (+TC & Screen)
  5. Check the focus on the camera
  6. Try another camera (normal cctv camera will do), or another monitor.