Game Connections

Power Supply

None of the supplies share grounds. Connecting grounds will blow the fuse (rated 7A) and may cause damage.

Opto Sensor Connections

Mating connection on circuit board is receptacle with socket contacts.

There are 7 score holes within the playfield: the center top hole triggers both sensors for the upper left and upper right score holes.

The sensor apparatus is connected to a constant +12 and GND. The corresponding enable pins must be pulled to ground, which turns on the transmitter LEDs (presumably IR, as they aren't apparently lighted; however, if the cabinet is open in the presence of natural light, it can interfere with sensors). Sense pins will then float until the beam is interrupted, at which point they pull to ground.

Experimentation has shown that the sense output on our test machine is floating; it does not "pull up" to 12v, and has not created a problem when hooked directly to the input on joystick encoders that use pull-to-ground. Unfortunately, while these were popular in the past, it seems most have now evolved to use a pull-to-+5V scheme (probably so the +5 can power LEDs). Unfortunately, these are incompatible or require additional circuitry to adapt.

There is a red LED on the opto sensor board that flashes when the beam is interrupted. It is always on when the transmitter LED is not enabled.

Playfield lighting

For our purposes, a mating cable with 6-pin receptacle with socket contacts will utilize circuits 1 and 4 (bruin/rood) to provide a 2-pin connection to our circuit board, which supplies 12V for an LED lighting panel during a game. We have repurposed the 120V lines to provide a power for the monitor; these are unswitched.

This connector attached to the existing fluorescent lighting over the playfield. Skeez Ball repurposes it as power for the display monitor.

This connection was unused, so Skeez Ball repurposes it for +12V LED lighting for the playfield. The 12V LED lighting panel utilizes the mating connector/contacts.