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Viparspectra 300W Repair

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The controller no longer lights up and neither does the light.  I know my way around a multimeter, but I am not very familiar with the functions of the control board as relates to these LED drivers and fans.  I am open to any suggestions for continued trouble shooting or repair of this great light.  

 

I did reach out to Viparspectra and they no longer supply OEM parts for this model.

 

vs1.jpg

vs2.jpg

vs3.jpg

Start with the basics, check the fuse, check the input connection wires for continuity and that whatever power is actually making it into the unit.  It looks like the three drivers are in parallel, so if one fails it shouldn't take down the whole thing, so if power is getting in, the fault is likely in the controller.  The LEDs themselves should be driven with PWM, but the controllers may be controlled with PWM or a voltage - looking up the part number on the driver units should be able to confirm or give you a pinout for the connector to be able to see if the required signal is getting to the drivers (it probably isn't).

If the controller is at fault, check connections and for obvious damage, then check the voltage on its power supply - the most likely situation is usually some kind of power supply failure.  If it looks normal it could be something trickier, maybe disconnecting things and trying to get it to turn on in a very minimal configuration could point towards what module is at fault.  If the controller isn't driving the control method for the drivers, you could also try injecting that (much easier if it's a variable voltage), or you could check the resistance of the potentiometer to verify it's actually changing.

 

I wouldn't expect the fans to be the issue, but you could disconnect them and power it up - if not run for long, the LEDs should be just fine without forced air cooling.

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