New Trackspot problem

muvmentmuvment Registered User
edited November 2009 in HES Automated Lighting
I've got a 1st half 99 trackspot with a problem I've never seen before. Beside the complete set of bad motors.

Upon startup, the color and gobo wheels shake. There is no tension on the pan, tilt, and shutter motors (outside of a pan motor going out). One motor chip (color) was blown in the socket with a pin completely fried. Slot looks ok. Motor chip replaced. I've tried switching the EPROM, and most other chips that are removable, but to no avail. Not sure if the personality DIP is failing, but it doesn't matter what personality switch is selected, nor does the unit go through boot.

After the wheels shaking for a while, they stop, there is a long pause (no error sound), then they start shaking again.

No obvious components blown, based upon visual inspection on the front side of the board. Nor is there any traces blown.

Comments

  • muvmentmuvment Registered User
    edited October 2009
    Thats was the 2nd thing I tried. I tried again, pulling a proc from a working unit with a similar manufacture date.
  • tadawsontadawson Registered User
    edited October 2009
    Have you checked the motor power supply voltage to see if it might be low?

    - Tim
  • muvmentmuvment Registered User
    edited October 2009
    I just switched out the transformer, and thats not it. We were getting some weird signals from a diode, but they all test within specs. I'm going to spend some more time on it tonight.
  • muvmentmuvment Registered User
    edited November 2009
    Conclusion: all 5 motor driver chips needed replacing. the Color and Gobo chips were sending some weird signals, the other 3 were completely dead. Replacing all 5, and the fixture works perfectly.
  • tadawsontadawson Registered User
    edited November 2009
    Wow . . . I wouldn't have ever guessed that! Glad you got it sorted though!

    - Tim
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