(Topic ID: 301973)

Fuse value on black knight PSU

By martymart

2 years ago

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4 posts
3 Pinsiders participating
Latest reply 2 years ago by Brewchap
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Black Knight Williams, 1980

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I am working on a Williams black knight and it has a blown fuse. I am confused as the manual has a different layout to the actual board.

Someone had installed a 7amp fuse previously but I feel this fuse is for the solenoids as the ball will not kick out at the start of the game. Based on this I believe it should be 2.5amp SB fuse.

Can someone please confirm if my thoughts are correct that this is the fuse for the solenoids and is a 2.5amp SB. I have added a photo below as a reference point. Any assistance is greatly appreciated.

FF6727EB-EA62-427D-AD1B-DD1D3132459D (resized).jpeg

Quoted from koen12344:
Yup thats an older board. Should be fine though.
From left to right:
F4 for flippers 20A
F2 for solenoids 2.5A SB
F3 for lamps 8A
F1 display HV 0.25A SB
F5 for 5V 4A

That is great and thank you for the quick response. Is it safe to assume F4, F3 and F5 are quick blow fuses.

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