sw = switched lamps / cpu controlled lamps.
gi = general, always on lamps
(Topic ID: 53154)
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3 weeks later
Display and feature lamp data leave the MPU on the J1 connector. This connector is potentially flexed when opening and closing the backbox door.
2 months later
1 month later
Are they lighting up when using the tester at the lamp driver board? If so check for 6vdc on the lamp socket side connected to bare wire under the playfield. If there is no +voltage here follow the wire back to the xformer/rectifier assembly.
Good to hear the MPU is working out for you!
Andrew
Meter set on volts DC. Black lead on ground (can jam it into the ground braid in the cabinet somewhere) red lead on the lamps that dont work. See if you are missing the +6vdc that powers the lamps. If you are missing the supply voltage, follow the wire back until you figure out where the lack of continuity is.
Basically feature lamps work like this. They are always hot having 6vdc on one side of the lamp. The lamp driver board gives each lamp a path to ground via the SCR turning on and off.
1 week later
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Seaside, OR
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