universal slot machine jam

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Pitts256:
How about the door key lock switch?

There should be about +32 volts DC on the the two wires to the coin comparitor. Orange the positive to green the ground. The green LED on the front of the comparitor should be on when there's power at the plug. Unplug the connector from the comparator and inspect for any signs of hot spots, burns, like an overload.

bidault:
The power is on and there is no voltage on the wires to the coin comparator. the green led is not lit. The connector is perfectly clean.

Pitts256:
So there should be power to the coin comparator when the power supply is powered up. Check for voltage at the power supply plug CN-4 (see photo). The +32v DC is measured from the black wire (pin 10 ground) to the violet wire (pin 11 +32v). No voltage? Check the 3 amp fuse F6. There's voltage at the CN-4 plug wires? Then check the white plug just to the right side of the coin comparator for +32v, follow the plug-wire from the comparator red plug around the backside to the white plug, should be a violet and black wire. Let me know what you find.

Still need to know too if the door key lock is making or breaking the photo eye as mentioned earlier. Is there a lever on the key lock that makes or breaks the photo eye beam? Is the red LED going off-on? In your photo the LED is on.

bidault:
Sorry for the delay I was travelling abroad. I checked the voltage at the power supply plug CN-4 it's OK 34V. I checked the white plug on the right side of the coin comparator following the wires from the red keyplug, no voltage betwin the blue and violet wires (picture). There is a lever breaking the photo eye on the the key lock system of the door (picture)

Pitts256:
Welcome back!

First lets test the key lock lever. When you turn the key the lever should block the switch photo eye and the LED light should go out. If it does we're good, if not try blocking with a piece of paper. If it's still on the switch is bad.

Next we need to find the 32vdc to the coin comparator. Yep, the violet & blue wires should have 32vdc but only when the machine is ready to run. On the CN-10 9 pin plug (see photo) check for 32vdc between pin 7 (violet) and pin 8 (black). If the CN39 pigtail is there it's easier to check for voltage at the pigtail. The black wire and violet wire should have 32vdc. The blue wire is the comparator inhibit control wire. So if we have 32vdc between the violet and black wires then I still think there's a permissive holding us out.

Also take a look at the backside of the white cherry switch, the wires need to be connected the same as the ones in the attached photo.

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