An easy fix to a drill battery charger repair. Model: Bosch AL1860CV
A customer walked into my shop carrying an expensive drill charger and two batteries. He explained that the charger was dead and he wanted it to be fixed so he can test and charge these two batteries.
When I powered up the device, the green light should come on to indicate it readiness to charge the battery.
For some reason, the charger was completely dead.
The charger uses this kind of batteries and from looking at them and testing them with my voltmeter, they were also completely dead. My recommendation was not to fix the charger because when it is fixed, the customer has to buy new batteries to charge them on that charger. The customer insisted on the repair of this charger and so here it goes.
If you look closely, you will see that someone tried to get it fixed and for some reason he did or could not.
If you look to the fuse, you will see the added soldering joints on it but that could not bring the charger back to life.
This is a fan located under the charging pin and it supposed to come on during the charging cycle according to the user manual of the charger.
The moment I looked to the board of the charger, I noticed right away the cold soldering joints which I think were the main reason why the charger was dead. I was getting voltage reading on the capacitors but beyond that area, I was getting nothing.
This was the easiest repair I have ever encountered.
With my soldering station on and my fume extractor fan running, I re soldered all these connections on board. This was the result.
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.
P.S- Do you know of any your friends who would benefit from this content that you are reading now? If so, forward this website to your friends or you can invite your friends to subscribe to my newsletter for free in this Link.
Note: You can check his previous repair articles in the link below:
https://www.electronicsrepairfaq.com/a-dead-exit-sign-brought-back-to-life
About admin
Jestine Yong works as an Electronics Repair Lecturer in Kuala Lumpur Malaysia and his training website is http://www.NoahtechElectronicsTraining.com. You can check out his repair blog at http://www.JestineYong.com
19 comments on “An easy fix to a drill battery charger repair. Model: Bosch AL1860CV”
Leave a Reply
Leave a Reply
This site uses Akismet to reduce spam. Learn how your comment data is processed.
good article
Hector. thanks and have a blessed day
Well done! Many times dry solder will be the cause for malfunction!
Parasuraman: thanks. yea, as technicians we always think of complicated repair but sometimes what is takes to repair a device is just re solder the board and you are set to go
Congrats for Quick fix ….Waleed
The previous repair engineer was lucky that he didn’t melt the silver in the glass fuse while soldering both ends.
It probably still means that the batteries of the customer may have to be replaced soon. Especially if they have been dead long.
Albert: as I was informed by the customer later on that he got some used batteries and he was charging them on this charger.
Hi I’m Osman from Ghana, I have been reading your article for some time now and man you are doing great, more grease to your elbows.
Osman: nice to meet you. thanks man. have a blessed day my friend
wonderful article. i am impressed.
very cool artical keep on keeping on!
Hi, i have same charger and i want name of transistor of side 150uf capacitor?
thats a Nchannel mosfet
hi,can u help me plz, what is value of resistor between chok an relay? thank u🙏🌹
Hi, I have the same charger and would like to know the rating of the glass fuse please
Chris
schematics al 1860cv
i would like schematics controller danfoss 101n0640 defect led 3
Hi, i have a similar problem. I bought a used bosch cordless drill but the charger is not working and someone pulled some part out. Charger model AL 2450 DV. Missing is mosfet V5, IC N1 and resistorR3. I can whatsapp pictures my whatsapp no is +254-772-722582. Will really appreciate your assistance
Hi! Its possible to convert the same charger from 240v to 110v? Thanks