Cyclone
Williams, 1988You're currently viewing posts by Pinsider borygard.
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Ensure your Solenoid 12 driver (A/C select relay) is engaging.
Do you hear the relay "click" on solenoid 12 in test? Or when switching from A to C cycling through the cool test.
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Rob Anthony
Pinball Classics
http://LockWhenLit.com
Quality Board Work - In Home Service
borygard at gmail dot com
All great questions...
Quoted from PDX_Pinball:...
1. Each flasher has an orange and black wire. What voltage should the orange wire have when not flashing? How about the black wire?
The way the A/C relay works is it cuts power to the flashers when they aren't being lit. So you should get no power to the orange or black wire if the game isn't engaging the flashers.
Quoted from PDX_Pinball:2. Is the orange wire one long wire that runs to each flasher (like GI)?
Yes, basically.
Quoted from PDX_Pinball:3. When it's time for the bulb to flash, does the game ground the black wire? Or is it giving the black wire power and then grounding every half second to create the flash?
The black wire is grounded by the CPU when the flasher is suppose to light. At the same time, the CPU is engaging the A/C relay to apply 25V to the flashers.
Quoted from PDX_Pinball:4. How does the resistor board play in to this? Is it dropping the voltage from the aux power board? If a resistor is bad, would it cause too much power to go to the flashers and burn them out?
The resistors reduce the current to the bulb. If they were shorted they could reduce the life of the bulb.
If you're getting 40V to the bulbs, something isn't right. Exacty which jumpers, W1 through W5, are present on the Aux Driver Board?
What is the voltage at the flashers that are working properly?
--
Rob Anthony
Pinball Classics
http://LockWhenLit.com
Quality Board Work - In Home Service
borygard at gmail dot com
What does the 25V test point on the Aux Driver Board measure?
Remove the resistor board and inspect it. Are any of the resistors jumpered over? Do the resistors measure correctly?
--
Rob Anthony
Pinball Classics
http://LockWhenLit.com
Quality Board Work - In Home Service
borygard at gmail dot com
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St Louis, MO