1500points
New member
Black Knight lighting problem? Troubleshooting help please.
I am having an issue with the lights for numbers 2 through 9 on the lower playfield.
(The center line of lights in the sword).
They are always slightly on and have about twice the brightness of the other lights.
They do go on and off at times but it appears they are in sync with the Lock lights at the very top of the playfield.
The upper right drop target timer light seems to be in sync with the number 4 light.
I've put a meter on the lamps and they aren't much different than the dimmer lights. they surge up to 13Vdc at times.
Where do I start troubleshooting this?
I don't see any physical contact points, shorted wiring, or anything visually wrong with harness or connectors.
Diode bad somewhere?
Transistor on a board?
I haven't pulled out the schematics yet, wanted to see if this is a common Williams issue that others have noticed.
Thank you.
I am having an issue with the lights for numbers 2 through 9 on the lower playfield.
(The center line of lights in the sword).
They are always slightly on and have about twice the brightness of the other lights.
They do go on and off at times but it appears they are in sync with the Lock lights at the very top of the playfield.
The upper right drop target timer light seems to be in sync with the number 4 light.
I've put a meter on the lamps and they aren't much different than the dimmer lights. they surge up to 13Vdc at times.
Where do I start troubleshooting this?
I don't see any physical contact points, shorted wiring, or anything visually wrong with harness or connectors.
Diode bad somewhere?
Transistor on a board?
I haven't pulled out the schematics yet, wanted to see if this is a common Williams issue that others have noticed.
Thank you.
