Shark Upright Vacuum Cleaner Repaired
A customer brought in a Shark upright vacuum cleaner that would not work. They had also noticed that for some time the roller head feature had not worked.
So, I decided to start with the basics. Disassembling the vacuum exposed all the necessary components.
Firstly, I had to be sure that I had voltage to the switch and motor, which I did not.
It’s not unusual to find a broken power wire due to the cable being bend and twisted around storage hooks. After removing the power cord, I tested each individual wire. Sure enough, the neutral wire had a very high resistance.
After carefully examining the power cord, I could see a slight bend, so I decided to open up the cable at this point.
The break was near to the vacuum, so after shortening the power cable and reinstalling the wires back onto the vacuum, I decided to tackle the next problem – the non-operating power head.
After upending the vacuum, see what I found………
I was unsure that perhaps they had accidently sucked up their small dog into the vacuum, but no, it was just human hair. I thought that perhaps the motor had been burned out due to the hair jamming on the roller, seizing the motor. But before I guessed what had happened, I decided to do more testing.
I had 245 volts to the motor feed and needed to look further. This required As I lifted up the power head, I noticed a rattling, like something was floating around inside the head assembly. It became obvious after the cover was removed that the main filter capacitor had come adrift and after closer inspection of the circuit board, its location was obvious.
After testing it with my ESR meter, it was found to be well within range at 0.59 Ohms for a 400 Volt, 100 µf capacitor.
At this point I felt confident in reusing the capacitor. But how could I stop it falling off the circuit board again? It is a large component with a reletively large mass.
Once the capacitor was soldered back in place, the only thing I could think of using was silicon to help hold it and keep it from vibration. All I had is what I use in the workshop. I checked to ensure this was non-acidic, so that I didn’t create problems further down the track.
By using silicon, this should help hold the case of the capacitor and put less stress on the legs.
After reassembling all the components and covers, a quick road test proved that the vacuum was successfully repaired.
I did a quick vacuum of the lounge to make sure that it was operating, but my wife suggested I do more testing and pointed to the rest of the house! 😊
Sorry, no video with this repair guys – you’ll have to wait for the next article 😊
This article was prepared for you by Mark Rabone from Australia.
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Note: You can check out his previous repair article below: