A Hand Blender That Works Fine But Has A Hissing Sound Repaired And Maintained
This hand blender was brought by my beloved niece on a Thursday morning and asked me about a hissing sound coming out of it. Sure enough I powered on the device in the shop and it was working just fine and I indeed heard that hissing sound coming out of it.
I popped open the bottom plastic piece and I was able to see the hidden screws in this device and the rest was easy.
That is an adjustable button for the speed of the motor that my niece did not know about and to tell you the truth neither did I tell I got it fully opened.
That is the device fully taken apart and as seen there is nothing wrong with it till I started to check the main board.
A very simple design and if you look to the far right of the board you would see the adjustable resistor for the motor speed.
My niece said that the motor was running slow from day one when she bought this device not knowing that rotating this knob will speed up the motor or slowing it down according to the need: we both laughed about it for while (LOL).
That was the main cause for the hissing sound coming out of this device. It was simply a bad soldering job that turned into a pin that is loose discharging power every time the device was powered on.
Once that fixed (sorry I forgot to take a photo of it) the machine was running just fine and my niece was able to adjust and control the speed of the motor. Of course I re soldered every pin on that board although some of them did not need it but did it anyway and to that I could say:
Mission Accomplished.
This article was prepared for you by Waleed Rishmawi, one of our ‘Master Authors’ and currently working in the Bethlehem area of Palestine repairing electrical and electronic equipment.
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Note: You can check his previous article on A Blue Tooth Speaker With Charging Port Ripped Off Repaired
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Yogesh Panchal
March 29, 2025 at 4:49 pm
Good Job! Waleed
Waleed Rishmawi
March 30, 2025 at 10:54 pm
Yogesh: thanks man.
Parasuraman S
March 29, 2025 at 4:57 pm
I hope you lubricated the connectors and other contacts and also applied grease on the bearings. Many thanks for sharing, dear friend!
Waleed Rishmawi
March 30, 2025 at 10:56 pm
Parasuraman: yes of course I did that to insure everything running within specks. You are most welcome dear fiend.
Albert van Bemmelen
March 29, 2025 at 5:28 pm
I believe that in the parts on the photo the rotation knob didn't show but guess it was attached to the potentiometer on the pcb in the bottom of the device.
Albert van Bemmelen
March 29, 2025 at 8:45 pm
I see it probably was the plastic small white toothed wheel that controlled the motor speed.
Waleed Rishmawi
March 30, 2025 at 10:58 pm
Albert: yes it was.
Waleed Rishmawi
March 30, 2025 at 10:57 pm
Albert: yes it was. Sorry it was not a clear photo of the parts. Have a blessed day
muykit
March 29, 2025 at 10:28 pm
pretty nice job !
Waleed Rishmawi
March 30, 2025 at 10:59 pm
Muykit. Thank man. Have a blessed day
Anwar Yunas Shiekh
March 29, 2025 at 10:40 pm
Great fix
I have a Wi-Fi unit where most of the LEDs didn't work, resoldered them and they worked for a few days... haven't quite figured out what is going on.
Waleed Rishmawi
March 30, 2025 at 11:02 pm
Anwar: check if you a bad LED light causing all the led’s to go off assuming the wi fi device is working fine. Have a blessed day
Mark J
March 30, 2025 at 3:22 am
Waleed good job on the repair.
Waleed Rishmawi
April 1, 2025 at 12:03 am
MarkJ: thanks man. Be blessed today
Imoudu
March 31, 2025 at 5:55 am
Good job man
Waleed Rishmawi
April 1, 2025 at 12:04 am
Imoudu: thanks man. Have a blessed day