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How do I manually test control inputs on TFT remote control systems?

When diagnosing communication or control issues in TFT remote systems, manually testing control inputs can help isolate the source of the problem. This guide walks you through how to safely test control signals using a jumper wire and how to determine whether the fault lies in the keypad, wiring, or monitor communication.

When electrical or communication issues arise in your TFT control system, one of the most useful diagnostic tools is manually testing the control inputs. This procedure helps determine whether a switch, keypad, or wiring fault is causing the problem—or if there’s an issue deeper in the system, like on the monitor’s RS-485 communication line.

When to Use This Procedure

  • One or more control functions (e.g., movement, fog/stream, park) are not responding.

  • You're troubleshooting a joystick controller, tether station, aerial interface box, or RP flush mount controller.

  • TFT Tech Support has asked you to verify input response manually.

What You’ll Need

  • Small screwdriver (to open the control unit)

  • Short jumper wire (for testing inputs)

  • Awareness of dip switch #4 position (determines input mode)

Step-by-Step Instructions

  1. Access the Control Box

    • Use a screwdriver to remove the panel or lid.

    • Carefully expose the terminal blocks and dip switches.

  2. Locate Dip Switch #4

    • This switch determines whether the control inputs operate as ground-switched or positive-switched:

      • OFF = Ground-switched: jumper from ground block to input.

      • ON = Positive-switched: jumper from positive terminal to input.

  3. Set Up for Testing

    • Confirm the current dip switch setting.

    • Prepare your jumper wire accordingly (from either ground or positive).

  4. Manually Test Each Input

    • Sequentially jumper to each input:

      • Up

      • Down

      • Fog

      • Straight Stream

      • Park

    • With each test:

      • Confirm the monitor responds correctly (movement or function activates).

      • If it does not respond, the fault may be beyond the input—likely in the communication or wiring.

  5. Interpret the Results

    • If all inputs work manually: the keypad, toggle switches, or wiring to the inputs are likely at fault.

    • If some inputs do not respond: possible issue with RS-485 communication, wiring, or internal board failure.

Additional Notes

  • The blue and white wires are for RS-485 communication—ensure these are properly connected and undamaged.

  • This test can be performed across multiple unit types that feature manual input terminals.

  • Always disconnect power before opening enclosures or adjusting wiring.