Frequently Asked Question

All Categories » (2) Video Intercom systems / [MT-701][MT-804][MT-MT-D5S] - MT 2 wire Intercom Series / MT-700/800 series, Video Entry Troubleshooting

MT-Troubleshooting?

Last Updated 7 years ago

Replace monitor with working one
- If working, check dip-switches on original monitor otherwise, warranty (Dip Switches on pg. 4 – MT Manual)
- If not working, perform local test with fresh wire (18awg/2-conductor, stranded, unshielded) connecting Door Station, Separator, Distributor and PSU
  - If good, check wiring distances or possible short in the wire-run. (Wiring Distances on pg. 3 – MT Manual)
  - If not, bypass 2-4, connect monitor directly to “monitor bus” at the MT-202
    - If good, warranty the 2-4
    - If not, check voltage at power supply (~24vDC), adjust if needed.
      - Possible Replace – MT-202/Door Station

- …on multiple/all monitors?
  - Check voltage @ Power Supply & both buses @ MT-202 (~24vDC)
  - Check impedance switch @ MT-2-4 (Should be ON at the last 2-4 in the line)
  - Take one monitor and test it direct to MT-202 monitor bus
    - If good, replace MT-2-4
    - If still not working, replace MT-202/Door Station
No Audio…
- ...to/from the outdoor panel
  - …at one monitor
    - Check volume controls (on the side and on back)
    - If not, replace with a working monitor –
      - If working monitor is good, replace monitor
      - If working monitor is not working, check wiring
    - Perform local test with 18awg/2-conductor, stranded, unshielded wiring –
      - If working, there is a short or misconnection in the wiring
      - If not working, replace door panel
  - …at multiple monitors
    - Check volume controls (on the side and on back)
    - If monitors are on the same 2-4, check one monitor direct to MT-202
      - If working, check wiring to 2-4 from bus, otherwise replace 2-4
      - If not working, is the power separator led lit
        
        Yes – Replace 202
        
        No – Check power supply connections V+/V-
    - If monitors are out on separate 2-4’s, try working monitors at each malfunctioning location
      - If working monitor is good, replace monitor
      - If working monitor is not working, check wiring.
    - Perform local test with 18awg/2-conductor, stranded, unshielded wiring –
      - If working, there is a short or misconnection in the wiring
      - If not working, replace door panel

…at all monitors
- Check wiring from door station
- Perform local test with 18awg/2-conductor, stranded, unshielded wiring –
  - If working, there is a short or misconnection in the existing wiring
  - If not working, replace door panel

No Ringtone…
- …at monitor
  - Check a working monitor at that location
    - If working, replace monitor.
    - If not working, check impedance switch (should be ON at last 2-4) & voltage at MT-202 monitor bus (24vDC)
      - If okay, replace monitor
- …at door panel
  - Check that switch 7 is on at the monitor
    - If on and still not working, check wiring –
    - Perform local test with 18awg/2-conductor, stranded, unshielded wiring -
      - If working, there is a short or misconnection in the existing wiring
      - If not, replace door panel

Strike does not…
- …open
  - Ensure you have a 12vDC lock
  - Check the 6-pin connector wires (for an NO lock, use RED and YELLOW wires, for an NC lock, use BLUE and YELLOW)
  - Apply direct voltage to lock contacts
    - If not working, replace strike
    - If strike is working, check voltage from BLUE and YELLOW wires (should be 12v) and check to make sure jumper “SIP1” is in place at 2+3 or 1+2
      - If voltage is too low, or 0v, replace door station
- …open for long enough
  - Change dip switches 4 + 5 at the door station (see manual pg. 5)
  - Check voltage at BLUE and YELLOW wires.
  - …buzz
  - DC Strikes do not buzz, AC Strikes do but require an Altronix 6062 relay and their own dedicated power source to use with the BEC video system.

Frequently Asked Question

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