PHILIPS QT 4019 Trimmer Repaired
Received not working PHILIPS QT 4019 Trimmer for repair, stating charging LED indicator is glowing but device is not working on when slide the On/Off slider switch.
For testing I slide the on /off switch but device is not turning ON.
So for further inspection I disassembled the device by replacing Blade unit & screw on handle. On opening I found inside circuit covered by hair tufts.
after Cleaning I powered the unit & slid the on/off switch & motor start spinning.
Reassembled the unit for testing. powered the unit & slide the switch but it is not working. Again opened everything & tested on the power slide the on /off switch & found Motor is spinning. (this is my First attempt to repair this type of device I never used these type of devices for my personal use so working process of this device is new for me).
So bit confused what is going on, checked Circuit for dry solder, Loose contact & battery for working everything seems OK.
Packed everything up again and tested it, again device is not working this time I simply removed the blade unit and turned on the device and the motor started spinning, indicating that the device is not working when the blade unit is connected. So removed the blade unit for inspection.
I found units’ upper blade is not moving It looked like a jam, disassembled Part by Parts & I found it stuck because of Hair tufts between the blades.
Cleaned everything.
I put little grease to lubricate blade sliding area & re assembled everything back, powered the unit again & found Unit is working perfectly.
& device is ready to pickup.
There are many reasons why a device may not work. They maybe electronic circuit, mechanical parts, physical & also environmental effect also involved. Once we understand the working process of the device it is easy to find culprit.
This article was prepared for you by Yogesh Panchal who works as a Computer Hardware Engineer in Mumbai India.
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Note: You can check his previous repair articles on Philips AQUATOUCH AT620 Shaver Repair
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Parasuraman S
October 11, 2025 at 7:13 pm
Many thanks for sharing a unique repair work, which had dual role, one of barber and another of technician! But let me be frank, I find it disgusting to do this type of job on other's hair dressing tools!
Yogesh Panchal
October 13, 2025 at 4:37 pm
Thank you!Sir
i know it is disgusting but this is new experience for me & off course i used disposable gloves.
tree
October 11, 2025 at 8:49 pm
Excellent sir, always gaining new knowledge. Thank you.
Yogesh Panchal
October 13, 2025 at 4:38 pm
you're Welcome! Tree
Albert van Bemmelen
October 11, 2025 at 9:14 pm
Indeed a very messy hair clogged shaver repair! There no doubt is also a reason why pedicure ladies often wear masks while polishing other peoples nails. There is a lot of DNA that goes around. And health and safety reasons are mandatory.
Yogesh Panchal
October 13, 2025 at 4:40 pm
Albert, Experiment & Exploring new technology is my hobby i always take possible precautions while handling these type of device.
Mark J
October 12, 2025 at 2:39 am
Yogesh good job on the repair.
Yogesh Panchal
October 13, 2025 at 4:41 pm
Thank you! Mark J
Imoudu .O
October 12, 2025 at 5:40 am
Is there no way user can simply clean and remove hair after each use? Thanks for sharing sir.
Yogesh Panchal
October 13, 2025 at 4:45 pm
Imoudu.O,there is technical limitation for safety of user.
Bram
October 12, 2025 at 11:40 pm
Unless it is my own trimmer, I will not touch those hairy devices. I hate to see the skin bacterial stuff from a third party on my workbench
Yogesh Panchal
October 13, 2025 at 4:49 pm
Bram,
What if you're in the medical field? You'll need to take all the necessary precautions, or if you're not, you're limited in your experience with new technology.
Kiran patel
October 25, 2025 at 2:36 am
Good work
learned about daily routine machines need to properly clean