Hi fellow Surfer / Surf Champ owners : )

My surfer has an issue where the 5 'add bonus & add extra bonus when lit' features don't light up or scroll as they should when the ball hits the spinner. They've never worked at all since I've owned it but the spinner scores perfectly both lit and otherwise. Can someone tell me if the issue is linked to the spinner or is it a separate relay I need to track down. Not great with schematics, that's why I'm asking.

btw...picked Surfer up from a bloke who had her since '89 and it still has the original locks and keys and all the score cards, manual and schematics in their little folder in excellent condition! Just wish he'd stored it some place dry as the base had rotted and bits on each side. Luckily playfield, backglass and internals are all lovely. After repairing the cabinet and checking / cleaning relays n switches she started up and played great from the get go...except for the issue with the bonus lights. I think this machine is quite rare here in Australia and I love it...it's staying put.

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Thanks Pinbee!
I know the relay you mean...I'll look at it soon and let you know how I get on.

The 'c' relay functions well. When I manually advance the 'ks' relay it now lights up three of the five inserts. I checked the two not lighting and the bulbs are okay. The light stays fixed on the whole game. They also score correctly when lit. Not sure how to get them to scroll with the spinner...is there another relay or unit attached to this action?

On another topic...mine's had the coil for the knocker unit removed. I've got an A 5195 coil; can I use that? I think the one it should have is an A 5194. Also, there's only one wire going to the knocker...which tab do I attach it to or is it either?

Thanks in advance.

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Yeah, when the c activates it doesn't advance that ks unit...all scoring is correct and cleaned and adjusted. I'll double check it all though.
Strange...no black wire only the grey green which was neatly tied off and the coil was missing. I took the plunger and coil stops from my Class of 1812 just to test it. No black wire except on chimes and going to power supply...see pic.

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Oh wow...thanks! Does it matter which way round the wires are attached to the knocker coil?

Thanks, I've hooked the knocker up and it works...thought it'd be louder...lol. Maybe that's because my coil is 5195 not 5194??
I did shine up the two sides of the ks boards and lightly wet and dry sanded the jones plug connectors. I'll have to check the coil too.
I attached the pic of under the plastic power switch cover as requested.

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It was a dead coil on the KS relay as Pinbee predicted. Replaced the coil and it all works beautifully now...thanks again Pinbee!