Makita Charger Repair
I got this dead charger from another repair shop in town that was not successful in getting this charger fixed. The guy explained that he opened the device and looked for a fault but somehow he was not able to repair it.
That is a very expensive charger and the guy wanted it repaired as soon as possible.
As you can see there were no bulging capacitors or anything wrong with it when I scanned it with my naked eye.
I powered up the device through a current limiter and the light bulb stayed dim which is an indicator of no short in circuit. I powered it through 220 AC volts and checked for voltage reading at the main capacitor but there was none.
If you look at the photo above you would see a marked area and on the top corner you would also see a dark burnt spot and what confirmed this loose connection is when I powered the device up, I could hear a zap sound coming from that area.
The common sense here is to re solder this spot and get it over with but the moment my solder iron tip touched that part, the connection on that line collapsed on two of these pins.
I used wires to reconnect these two pins (sorry no photo) and soldered them down to the board.
I powered on the device and as expected, the power green light came on flashing and according to the user manual that I found online; is normal and that is a sign that the device is ready to charge the battery when attached to the charger.
The repair was done in less than twenty minutes. I called the guy to come and pick up his device who was really shocked that it did not take long to get this charger fixed.
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 IGBT and Industrial Bridge Rectifier Shorted
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Parasuraman S
October 6, 2021 at 11:25 am
This was a magic mission, accomplished with a simple solution. But we may have to wait and see what happens after the load is given.
Waleed Rishmawi
October 6, 2021 at 12:49 pm
Parasuraman: yes it was any easy to fix and the customer gave the OK on a successful repair. have a good and blessed day
Albert van Bemmelen
October 6, 2021 at 1:23 pm
Like always it is the weakest connection that breaks the current. Repairs like these are easy earnings in the pocket. And of course only an untrained service engineer would fail to see the cause of the failure.
Eric Rice
October 6, 2021 at 9:02 pm
Pretty cool when all the local techs know that you are “The Man!”
Good job!!
Waleed Rishmawi
October 7, 2021 at 2:25 pm
Eric: thanks man. have a blessed day
Babu M S
October 6, 2021 at 10:57 pm
With in 20 minutes your repaired the machine. It shows your experience. Thank you very much for sharing.
Waleed Rishmawi
October 7, 2021 at 2:26 pm
Babu: thanks for your comment. have a blessed day
Yogesh Panchal
October 8, 2021 at 4:02 pm
Good Job!Waleed
Waleed Rishmawi
October 13, 2021 at 3:42 pm
Yogesh: thanks man. have a blessed day
Humberto
October 12, 2021 at 10:54 pm
Good repair. Congrats.