Raw Thrills Jurrassic Park Arcade Machine Faulty Gun

Raw Thrills Jurrassic Park Arcade Machine Faulty Gun

We recently received a service call for a Raw Thrills Jurassic Park arcade machine where Player 1's gun wasn't shooting accurately. The crosshair was jumping erratically across the screen, making the game unplayable.

Our first step was to systematically diagnose the issue. We started by swapping the Player 1 and Player 2 gun connections to see if the fault followed the gun or stayed with the cabinet position. Since the problem remained with Player 1, we knew the issue wasn't in the wiring from the plug back to the game board.

Next, we tested the internal wiring within the gun itself—the connections running from the sensors to the plug connector. All of those tested fine, so we moved on to inspecting the sensors more closely.

That's when we found the culprit: one of the sensors inside the gun was physically damaged. Although it was still functional, the damage was causing the erratic crosshair movement we'd observed. We replaced the faulty sensor with a spare part and tested again.

However, the issue wasn't completely resolved. The crosshair was more stable, but still slightly off. We then checked the calibration on the remaining sensor and discovered it had drifted out of alignment. After recalibrating it to the correct settings, the gun performed perfectly and the machine was back in full working order.

To ensure the repair would hold up under real-world conditions, we tested the machine as a customer would—applying pressure and moving the gun around during gameplay. That's when we discovered the underlying structural issue: when the gun was pushed down toward the right-hand side, the potentiometer housing would separate from its mounting point on the opposite side, causing the sensor to shift out of alignment again.

We secured the potentiometer housing properly to prevent any movement during gameplay. After this final adjustment, the gun remained stable and accurate even under vigorous use, and the machine was ready to return to service.

This repair highlights an important lesson: sometimes the real culprit isn't just a faulty component or calibration drift, but a mechanical issue that only reveals itself under actual playing conditions. A thorough diagnosis includes testing the machine the way customers will use it.