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BSD VUK issue
- Thread starter Jon Fletcher
- Start date
- Joined
- Jul 21, 2011
- Messages
- 11,336
- Alias
- Ive
Put it into switch test mode and see which switches are showing active. Bang on the playfield also to vibration check dodgy connections.
- Joined
- Jul 21, 2011
- Messages
- 2,468
Measure volts across the white opto sender. If higher than 2v opto is bad , if lower than 0.5v there’s no power getting to it. If in between then check the wiring for the receiver.
OP
OP
Is it Ac or Dc Andy?
OP
OP
Thanks but not 100% sure what I’m looking for when you say that.
- Joined
- Jul 21, 2011
- Messages
- 11,336
- Alias
- Ive
OP
OP
Got it thanks. When the light beam was interrupted the switch showed up as working
- Joined
- Jul 21, 2011
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- 2,468
If the opto works in test mode but goes off randomly during gameplay then there are two options.
Either the opto is weak, so drops in supply voltage make it cross the switching threshold. Replace the opto emitter with a new one.
Or you have a ghost switch. In switch test ensure that each switch closure causes only one switch to respond on the display. If one switch causes multiple reactions then you have a switch matrix short somewhere.
Either the opto is weak, so drops in supply voltage make it cross the switching threshold. Replace the opto emitter with a new one.
Or you have a ghost switch. In switch test ensure that each switch closure causes only one switch to respond on the display. If one switch causes multiple reactions then you have a switch matrix short somewhere.
