Good Museum Report
Work

The legs of the relay driver transistor responsible for flipper enable were pushed together. Probably from when board was laid down to reflow solder. Separated legs and works as expected now.

Closed Problem: Flippers are on even when game is over. The flipper ground relay is for some reason now active even without a game running. Since I recently reflowed its output pins, it's worth checking those first.
Work

Status changed: Broken → Good

Problem Closed Minor

Flippers are on even when game is over. The flipper ground relay is for some reason now active even without a game running. Since I recently reflowed its output pins, it’s worth checking those first.

Latest: The legs of the relay driver transistor responsible for flipper enable were pushed together. Probably …
Work 0.5h ·

I realized that the soft coil problem was because the EOS switch wasn’t right. I cleaned and regapped the switch and everything started working. I properly mounted the new coil, resoldered the wires, and adjusted the flippers. Everything played properly, except that the flippers are active even when the game is over.

Work 3h ·

Desoldered coil to check resistance. Was a little low. Jumped to other flipper and it worked fine. Incoming voltage on blue wire is fine. Incoming ground on blue-violet showed no connection, as does orange-violet to right flipper. Traced problem to 2J12 pin 1. Reflowed solder on pin to create reliable connection from relay.

After putting the board back, the right flipper would twitch but not work fully. I tried swapping in a new coil and discovered that the flipper had been installed too tight to the playfield. Loosened that.

Currently the right flipper twitches. I tried a variety of jumper wire combinations and I can’t isolate the problem with the left flipper. Maybe the next step is current measurements?

Work

Status set to Broken to match an open Unplayable report (automated cleanup)