Trackspot Not Functioning

Hello All,

I have a trackspot that is not self testing or working on audio master setting. Here's some of the things Ive tried so far - maybe someone can point me in the right direction...

Board Version is 3.3 - TS IC version 4.2 - 3773 Motor Driver IC's

Sensors seem to be functioning - motors, shutter, gobos all home properly when power is applied to fixture.

Proper power is getting to board - checked voltage to board. Enable light is lit and fan comes on when first powered up.

When trying to self test, fixture goes through homing process, then does nothing - lamp does not turn on, mirror does not center itself. Just static after homing.

When trying fixture as audio master, it goes through homing process, then lamp powers on for a split second then goes out -- at the same time, mirror starts to move, then stops. After that, fixture is static.

Any help would be great - I am assuming the main logic ic is functioning since it does start to perform the correct functions... What is my next step in the troubleshooting process? Check resistors? Just start switching out chips? If so, which ones do I go with first?

Any help would be appreciated.
Thanks,
Chad
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  • 0
    Might want to try replacing ic6, I had one behaving similarly, and that was the fix.

    If you have a DSO, you can test it. trigger on pin 19 of ic6, then probe each of the output pins (which are the same as the D0-D7 data lines on the processor). You should be able to see these respond to the dip switches. If any of the outputs are stuck on or off, you should be able to see it.

    (an analog scope might work if the trackspot enables pin 19 often enough that you can see the level before it fades)

    Anyway, hope that helps.
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  • 0
    Might want to try replacing ic6, I had one behaving similarly, and that was the fix.

    If you have a DSO, you can test it. trigger on pin 19 of ic6, then probe each of the output pins (which are the same as the D0-D7 data lines on the processor). You should be able to see these respond to the dip switches. If any of the outputs are stuck on or off, you should be able to see it.

    (an analog scope might work if the trackspot enables pin 19 often enough that you can see the level before it fades)

    Anyway, hope that helps.
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