The tin is covered by 4 cover plates, each secured by 8 screws. Behind each of those four covers are two so-called segments, so your court is having 8 segments overall. Each of those segments has either a receiver or a transmitter sensor bar within the tin, arranged alternately, along with a controller.
If there's a constantly re-occurring blockage within a specific segment, despite re-calibration, there is a high chance that the sensor bars (the opposing pair) do not see each other well enough anymore.
To troubleshoot, it's advisable to swap sensor bars from the problematic segment with another one of the same kind. For example, to replace the sensor bar in segment 4, which might be a transmitter, it should be exchanged with the sensor bar from either segment 2 or 6 (because those are also transmitters).
Step 1 | Remove the Covers
Remove the plate that is covering the problematic segment and the one that is covering the donor segment. As mentioned before, you have to make sure the sensor bar is of the same kind (receiver or transmitter). Therefore, if you think Segment 4 is the one misbehaving, your donor segment would be Segment 2, 6, or 8.- Remove the 8 screws (TX45) of both covers
Step 2 | Unplug the Controllers
- Remove the power connector on both controllers (the right one in the picture).
- Remove the connectors coming from the sensor bar (the left one in the picture).
- Take a look at the sensor bar cables and make sure both have the same sleeve color (red = transmitter, black = receiver).
Step 3 | Exchange the Sensor Bars
- Unscrew the sensor bar of the segment that might be broken (TX20)
- Unscrew the sensor bar of the donor segment.
- Exchange the sensor bars and mount them in their new position. Do not turn or flip the sensors, the cable outlet at the sensor bar is always to the left side.
- Replug both sensor bar cables to the controllers in their new position.
Step 4 | Recalibrate
For a more in-detail description on how to recalibrate the whole system, have a look here.
For each of both segments:
- Make sure the big power connector is still disconnected.
- Move up DIP Switch 3 (ON). Do not move other pins and make sure the wall is not touched.
- Replug the power connector. Wait 3 seconds until a green LED appears (LED D).
- Move down DIP Switch 3 (OFF).
- Disconnect the big power connector again.
Step 5 | Reinstall the Covers
- Mount back the covers using the 8 screws per cover