Testing a fuse properly

Steps

• Take the fuse out of its clips (or lift one end); in-circuit readings can mislead.
• Set the meter to continuity, or its lowest ohms range.
• Touch the probes to both end caps: a good fuse beeps and reads about zero ohms.
• A fuse that falls apart when removed was fatigued and would have failed once hot.

Systems

• Data East CPU Version 1/2
• Data East CPU Version 3
• Data East/Sega CPU Version 3b

Related tips

• Checking a fuse properly
• Testing a fuse
• Fuse values to keep on hand
• PPB fuses on the nine-fuse board
• Backbox bridge fuses (late games)
• Power supply board fuses (late games)
• Solid state flipper board fuses
• Check fuse ratings and types before first power-up

Source: Repairing DataEast 1987 (Laser War) to Sega 1995 (Batman Forever), Part One, Clay Harrell (pinrepair.com)