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Nothing is working. My lights are not responding when I press the switches/buttons. What is ON stays ON and what is OFF stays OFF. What should I do or check?

The first thing you need to check is the transverter (power supply). In most systems, the transverter is located near the relays, often on the exterior edge of the enclosure. The model numbers produced in this time frame were as follows:  78K1 & 17C and TVR‐1. The transverter is the sole source of power to the relays. If it fails, the relays will not receive power which hinders the lights from operating. To prove the transverter, check for a proper output voltage across the two low voltage wires of the unit (labeled “switch” and “relay.”  The bullets below address what to do based on the voltage level found:

  • A voltage reading of 0 VDC. This means the transverter has failed and is no longer operating. Install a replacement transverter to restore the system.
  • A voltage reading of 0.1‐5 VDC. This shows that a switch is stuck in the ON position, causing the transverter to remain at a lower output voltage as it continues to send power to the related relay. You should notice the transverter is warm to the touch, as it is overheating. Click here to read how to troubleshoot a stuck switch.
  • A voltage reading of 28.5 – 44 VDC. This voltage reading shows that the transverter is putting out the correct voltage. Check the wiring connections on the low voltage side, to ensure that no commons have become disconnected and that the wire has not been damaged. If the wiring is proven, replacing the transverter would be the next step. Although it is showing the proper output voltage, there may be some kind of internal error in the unit which is hindering it from sending power to the relays.
  • A voltage of any other degree. If your transverter is giving a differing voltage than listed above (greater than 5 VDC but less than 28.5 VDC or greater than 45 VDC) the unit should be replaced. The system will not operate properly without the correct voltage being supplied. A replacement unit should solve the problem.

Category: Touch‐Plate systems dated 1946‐1985

← Nothing is working. My lights are not responding when I press the switches/buttons. What is ON stays ON and what is OFF stays OFF. What should I do or check?

Contact Info

Touch-Plate Lighting Controls

1830 Wayne Trace
Fort Wayne, IN 46803

Phone: 260.426.1565
Fax: 260.426.1442