from memory join two 68v zener diodes together.
Ian
Thanks Ian, I gave it a go with two 75v zeners and it works fine.
Man these boards are hard to get parts for!
I went to AZtronics yesterday and got a heap of parts (to do three boards) and now have one fully working.
One of the other boards has good voltages now but the left flipper is not working.
The other also has good voltages but it won't eject the ball and puts 11,000 points on the score when starting the game.
I found a brief mention in the pinrepair guide that mentioned the 74LS154 chip stating "it can fail but rare".
Well I compared that chip to the other boards with my meter and it looks like its gone.
Of course Jaycar have 74LS153's and 155's but no 154, they have 74HC154 but it is in a smaller package.
So I am now on the lookout for a 74LS154 chip.
I did find a site in WA that have the chips listed I emailed them today for info and prices.
http://members.iinet.net.au/~worcom/
