This fixed the problem.ĭuring attract mode, the crystal ball display should display two video animations that coincide with the animations on the large backbox display, the green WOZ and the JJP logo being drawn (as shown in the photo at the top). I cut off about 5 inches of cable and installed new connector pins.
Starting at the I/O board, I pulled some of the cable slack through the harness, up to the crystal ball. After re-pinning the connector, the problem seemed to be located further down the cable. Every time we thought the display was fixed, it would stop working. But the display still didn’t work most of the time. I had checked the continuity from board to board, which includes the connectors, and everything had checked good. Ultimately, the problem ended up being an intermittent cable issue.
#WIZARD OF OZ PINBALL MACHINE SERIAL#
The voltages on the other pins should be between 3 and 5 volts, except for brief moments during serial communication. The blue wire on the end of the connector is +5 volts (lets call this pin 1). The first thing was to check voltages going to the display. Images and video clips are stored on the microSD card and are selected by serial commands sent from the I/O board in the bottom of the pinball machine. There is a microSD card installed on the rear of the display. I had a cursory look at their technical documentation ( Serial Environment) to aid in my understanding how this display might be implemented in WOZ.
The display is made by 4D Systems of Australia. My customer had better luck, but ended up buying replacement parts he didn’t need. My e-mail communication with their technician just stopped on their end. Jersey Jack Pinball has been no help in this regard. My hope is that will help someone else in troubleshooting problems with the display. The purpose of this post is to explain a little bit of what I’ve been able to learn about the Crystal ball display on the Wizard of Oz (WOZ). This is an aftermarket version that features a larger glass ball, rather than a plastic ball. This is not the original crystal ball supplied with the machine from the factory. Symptom: Crystal ball display not working Crystal Ball on Wizard of Oz.
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