Lamps on a solid-state game drop out in groups or flicker.
Solid-state lamps out from bad connectors or header pins
Cause: Loose, burned or corroded connectors, or cracked solder joints on the board header pins.
Checks
- Find the lamp connectors and check for discolouration or loose fit.
- Look at the base of each header pin for a ring crack in the solder.
Fix
- Reflow cracked header pin joints and replace burned connectors.
- Change #44 lamps to #47 to cut the current.
Touch the cabinet ground before handling boards or chips; static can destroy solid-state parts.
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
Related tips
- Burned lamp connectors on a solid-state game
- Checking and reseating solid-state board connectors
- Label solid-state head connectors before unplugging
Source: Pinball Machine Care & Maintenance, Bernard B. Kamoroff (Bell Springs Pinball Alley)