Service Man Diary - FUZEPARZ Power Failure

This time, we received this par light with the symptom that it won’t turn on. Let’s proceed with the repair.

Elation / FUZE PAR Z120IP Waterproof LED Par Light

Equipped with LEDs that offer RGBW color mixing, it can be used in combination with the zoom function for beam focusing like spotlight. The robust housing is designed to be splash-proof, making it perfect for a wide range of applications both indoors and outdoors.

First, let’s check the symptoms. As reported by the customer, it doesn’t power on when the power cable is plugged in.

I opened it up and checked the continuity from the power cable to the power supply, but found no issues. The power supply’s output voltage was also normal, indicating the power supply itself wasn’t the problem.

Suddenly, the power turned on.

However, it soon shut off again.
Moving the cable sometimes caused it to power on, depending on its position.

Assuming a broken wire, I checked the continuity of the internal cables, but found no abnormalities.
It didn’t seem to be a broken wire after all.

- After a While -

Unable to determine the cause, I took a break before re-examining it.
Recalling that I might have applied pressure to the cable connected to the power supply’s output terminal, I carefully inspected the terminal.

I found that the screw threads were stripped!
Although this wasn’t directly related to the symptoms, it seemed like a clue.
I removed the power supply for a closer look.

My hunch was correct.
The solder on the board looked suspicious, especially under V2 where the solder was slightly protruding.
If the solder was cracked and floating, it could be resoldered, so I removed the board.

To my surprise, the entire pattern had peeled off.

(The protruding solder resembled a mushroom. It’s springtime, after all.)

While pattern peeling itself isn’t uncommon, I was surprised given the sturdy structure here.
The stripped screws and the protruding solder suggested that the screws might have been over-tightened during production. Using a power driver can apply too much torque, stripping the screws.

With the pattern peeled off, resoldering alone wouldn’t suffice.
Fortunately, a replacement power supply I had pre-ordered arrived, so I installed it.

Power ON!

With the new power supply, the unit functioned perfectly.

- Conclusion -

The issue was caused by solder cracks on the power supply, preventing the unit from powering on.
Over-tightening screws can lead to unexpected damage.
Please be mindful if you find loose screws yourself.
For any issues, please contact our support team.

Thank you for reading.