The sensors (opto's) are not registering the ball in the back when going through the boney ramp. I replaced the optos and reconnected the connections. Everything else works.. Anything else I can do? It's driving my crazy

#2 2 years ago

LTG

Pinside member

Hopkins, MN

12y 191K 56,989 24 7

https://www.pinwiki.com/wiki/index.php?title=Williams_WPC#Opto_Switches

Measure power to them. Also they are part of your switch matrix. A broken wire elsewhere could cause this too.

LTG : )

#3 2 years ago

???

soozgs500

Inactive member

Trenton, NJ

7y 21,900 20 3

I'm getting a reading on the receiver but not the sender. Couldn't find any broken wires or connections

#4 2 years ago

LTG

Pinside member

Hopkins, MN

12y 191K 56,989 24 7

OP
Quoted from soozgs500:
I'm getting a reading on the receiver but not the sender. Couldn't find any broken wires or connections

Opto driver board under the playfield. Getting a reading on the wires leaving it ?

LTG : )

#5 2 years ago

???

soozgs500

Inactive member

Trenton, NJ

7y 21,900 20 3

Have not done that yet but some people saying it could be a lm339 failure

#6 2 years ago

???

soozgs500

Inactive member

Trenton, NJ

7y 21,900 20 3

Update. Someone mentioned the LEDs on the optos we're backwards and they were right. That switch in test mode is now closed but opens every 10 seconds. So now have to figure how to fix that. Any ideas? But at least I know it's not the main opto board

#7 2 years ago

YAW

Lethal_Inc

Pinside member

Westminster, CO

11y 88,300 4,933 7 34

I had a similar problem with one of my coffin lock optos. In the end it was a bad opto receiver even though I replaced it with a new one. The new one was bad so I replaced it with another new one and that fixed it for me.

#8 2 years ago

???

soozgs500

Inactive member

Trenton, NJ

7y 21,900 20 3

Yes lethal I think it is the optos. Got a reading of 8.8v on all other optos and this one only got 5.9-6v so it's def the optos. Just ordered a set from marcospecialties

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