Jump to content

General Pinball Repair Logs (Updated 6/11/24)



The purpose of this is to put logs that I don't think need a proper writeup. It should be updated periodically.

Date: November 26th, 2021
Game: Williams Earthshaker
Symptoms: Left flippers not working, fuse F6 popping after holding down left flipper button
Solution: End of stroke switch for upper flipper was not aligned and disabling one of the windings on the flipper coil. Adjusting it fixed the issue.

Date: June 12th, 2023
Game: Demolition Man
Symptoms: garbage on lower half of the display regardless of what DMD unit I use.
Solution: Bad 6264 (don't remember the designator) on the display driver board.

Date: July 8th, 2023
Game: Gottlieb Buck Rogers Pinball
Symptoms: no displays despite repro boardset being in the unit
Troubleshooting steps: Noticed HV light for the displays was out. Checking the fuse, I could see that it was out. Replaced fuse, still popped once. Checked harness connections and one of the pins was pushed in. Replaced pushed pin and fuse didn't pop.
Solution: replaced display fuse due to bad harness connections and replaced probable cause for popped fuse.

Date: September 9th, 2023
Game: Bally Strikes & Spares
Symptoms: Sticking Flippers
Solution: Used oil in the coils, that is a no-no. Cleaned up oil and replaced sleeves.

Date: September 23th, 2023
Game: Williams Terminator 2: Judgement Day
Symptoms: Cannon not homing, missing some General Illumination
Solution: Cannon not homing issue resolved by re-aligned the switch. General illumination, like with many games of this time, had burnt connectors that needed replacement.

Date: November 18th, 2023
Game: Rocky and Bullwinkle
Symptoms: Right Flipper not working
Solution: Bushing that held the piston to the rest of the flipper assembly no longer held the link. So the piston wouldn't actually flip the flipper

Date: December 2nd, 2023
Game: Williams Gorgar
Symptoms: Both flippers weak
Solution: End of stroke switches were not very well adjusted. Adjusting them properly increased the flipper's power to acceptable levels.

Date: December 9th, 2023
Game: Williams Black Out
Symptoms: Player 1 score display flickering
Solution: Display tube was gassing. Replacing the tube solved the issue.

Date: December 9th, 2023
Game: Williams Twilight Zone
Symptoms: Balls sometimes getting lost in the gumball machine area
Solution: This was a goofy one. It ended up being a combination of slightly dirty optos and the fact that the far left trough switch had it's actuator replaced with a home made one. The problem was is that it would sometimes hold up the left trough switch so that it wouldn't register. I believe that's where the ball becoming lost came into play but I am not sure. It worked after all of that.

Date: December 10th, 2023
Game: Bally Bobby Orr pinball
Symptoms: Something was just off about the lights. They weren't making sense
Solution: One of the light driver connectors was offset by one pin, meaning that the wrong things were lighting up.

Date: December 10th, 2023
Game: Bally Popeye Saves the Earth
Symptoms: Bottom right flipper not working
Solution: Flipper fuse blown for bottom right flipper on driver board. Cause of fault was because the end of stroke switches for the flippers were trashed.

Date: December 17th, 2023
Game: Williams Flash
Symptoms: Game not starting
Solution: This was a really weird one. It was struggling to recognize switches with column one. Every time you would hit any switch in that column, it would trigger every switch in the row. So the game wouldn't start unless you held down the start button as a result. The solution ended up being to replace the 13N10L at Q81 (Rottendog board) with an IRL540 as the 13N10L was no longer manufactured and the IRL540 is what I had on hand.

Date: February 24th, 2024
Game: Data East Rocky and Bullwinkle
Symptoms: Game not booting, popped solenoid fuse
Solution: these are actually two separate issues. The not booting was caused by a low +5V. This was caused by several faulty capacitors in the regulator circuit. The popped solenoid fuse was a result of a shorted TIP36 drive transistor.

Date: March 23rd, 2024
Game: Williams Comet
Symptoms: Left pop bumper always engaged
Solution: This one ended up being a shorted ceramic capacitor across the switch controlling the pop bumper.

Added new logs


Recommended Comments

On 12/24/2023 at 6:42 PM, a3quit4s said:

Must be a Williams thing, my High Speed had the same issue with the EOS switch as your Earthshaker

It's a common issue with solidstate pins in general. It's important that your EOS's are properly aligned. Fuses popping is how they protect the coils and the flipper driver board.

Link to comment

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Create New...