A cabinet flipper button is slow to return or sticks in.
Flipper button sticks
Cause: Dirt inside the spring-loaded button assembly.
Checks
- Press the button with power off and feel for drag.
Fix
- Take the button assembly apart, clean the parts with alcohol and reassemble.
Systems
- Williams System 3
- Williams System 4
- Williams System 6 / 6A
- Williams System 7
- Williams System 9
- Williams System 11
- Williams System 11A
- Williams System 11B
- Williams System 11C
- WPC Alpha-Numeric
- WPC Dot Matrix
- WPC Fliptronics
- WPC DCS
- WPC-Security (WPC-S)
- WPC-95
- Bally MPU AS-2518-17
- Bally MPU AS-2518-35
- Stern MPU-100
- Stern MPU-200
- Bally 6803
- Gottlieb System 1
- Gottlieb System 80
- Gottlieb System 80A
- Gottlieb System 80B
- Gottlieb System 3
- Data East CPU Version 1/2
- Data East CPU Version 3
- Data East/Sega CPU Version 3b
- Capcom
- Electro-mechanical
Related tips
- Weak flipper: dirty cabinet button
- Flipper sticks in the up position
- Flipper sticks in the up position
- Flipper board LEDs show the cabinet buttons are seen
- Flipper buzzes when held up
- Replacing a flipper coil
- Flipper weak because the return spring is too strong
- Flipper coil numbers carry two windings
Source: Pinball Machine Care & Maintenance, Bernard B. Kamoroff (Bell Springs Pinball Alley)