My only issue is my trackball is not working at all. Looks to be wired good I pulled the connector apart on the back of the PC that looks clean and fine. In test mode all the buttons on the control panel work but I have nothing at all from the trackball. Figured I'd ask here to see where to look next.
If powering the nytric card doesn't fix it, here are some common trackball troubleshooting steps.
1. With power off and multimeter set to ohms, check for continuity between ground on the Red boards and ground on the PCB or power supply.
2. With power on and multimeter set to volts DC, check if 5v is present at both Red Boards.
3. Check the voltage on the four data lines. (2 per Red Board)
When you slowly move the trackball, you should see each data line alternate between logic high (near 5v) and low (near 0v) as the encoder wheel turns, blocking and un-blocking the optos to generate a quadrature waveform like this.
4. If one of the data lines is stuck high or low, check if one of the two IR LEDs on the board is burned out.
- Use your cel phone/digital camera to see if the LEDs are lighting -- the wavelength can't be seen by the human eye, but can be seen by a digital camera.
5. If one of the data lines is stuck high or low
and both LEDs are OK, the problem is probably either with a Red Board photodiode or the wiring.
- Swap X- and Y-axis Red Board harness connections.
- If the problem follows the harness connection, it's probably the wiring.
- If the problem doesn't follow the harness connection, it's probably the Red Board photodiode.
- If the problem disappears, it may have been due to a poor connection earlier. Swap them back and retest.
Scott