X-Files broken

Fixing the X-Files pinball machine turned out to be a straightforward repair . The problem began when the machine started behaving unpredictably during gameplay - cabinet hits weren’t registering. After some investigation, I discovered that the issue traced back to a few broken opto LEDs on the playfield. These opto sensors are used throughout the machine to detect ball movement without mechanical contact, so when they fail, gameplay logic gets confused.

The next step was to remove the faulty opto LEDs. This required carefully accessing the affected circuit boards beneath the playfield and desoldering the bad components without damaging the traces. Opto assemblies can be delicate, and the infrared LEDs aren’t always visibly burnt out, so each one had to be tested with a camera or multimeter before replacement. Once confirmed, I desoldered the non-working LEDs, cleaned the solder pads, and prepared the board for the new parts.

After sourcing the correct replacements (MT5000UR TLRH180P 165-5100-00 165-5052-00), I soldered in the new opto LEDs and reinstalled the boards. I double-checked alignment, polarity, and solder joints before powering up the machine. The moment of truth came when the machine booted smoothly, and all the previously unresponsive switches worked flawlessly again. Watching the X-Files pinball come back to life with smooth, accurate ball tracking made the effort completely worthwhile. It was a satisfying repair that not only solved the problem but also deepened my understanding of the game’s optical sensing system.