Lamp Matrix Tester Board

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Lamp Matrix Tester Board

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Wiring Harness

System 3-7
WPC / WPC-95
System 9-11

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Pre-assembled wiring harness Included!

Simulates the lamp matrix output in an 8x8 grid, operates either on the bench or with the main boards still mounted in the machine. This is sold as a fully assembled circuit board, and now also including pre-assembled wiring harnesses too. Select from the drop-down menu if you need for System 3-7, System 9-11, or WPC generation machines.

Bench Testing Lamp Power

If you're testing a driver board mounted in a machine, you won't need to provide any additional power to drive the LED matrix board. If testing on a bench, you'll need to supply anywhere from 5 to 18 volts DC to the lamp matrix power input connector on your driver board.

System 3-7 the lamp matrix power input is at connector 2J4.
System 9-11 the lamp matrix power input is at connector 1J4.

WPC89 and WPC95 boards have an integrated power supply, and I currently am not supplying instructions for how to bench test the lamp matrix outside of a machine.

Testing with the diagnostic board.

Ok, so all the above is done, and you're ready to start testing. What does this silly little thing do? It simulates the playfield lamp harness, meaning any time a lamp on the playfield would normally turn on or off, an LED on the matrix block will replicate that. This can be done in any mode that would operate the lamps. Attract mode, game play, or via the CPU board diagnostic routines if present.

Simply attach the 16 pin connector onto the tester board header, and the two 8 pin connectors onto your CPU/Driver board where indicated. These are your normal lamp matrix wiring connectors that connect your controlled playfield lights to the boards.

Generally a CPU / Driver board problem will be related to a full row or full column. This means that a single bad lamp is usually not a board problem, but is a harnes problem. What you look for in a circuit board issue is that full rows and/or columns will be non functional, or they will be locked on when they should be shut off. Once you identify a faulty lamp or column, then you need to start tracing back the components on the board, which extends outside the scope of these instructions.

The tester board is oriented the same as the diagrams in your manual that show the lamp matrix. So column 1 on the diagram will be the leftmost column on the tester board. Row 1 on the diagram is the top row of the tester. (Unless you wired it backwards).