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Electronics => Repair => Topic started by: Bashstreet on December 03, 2017, 01:00:05 am

Title: Repairing a drill battery charger.
Post by: Bashstreet on December 03, 2017, 01:00:05 am

Hallo allo.

My battery charger has gone kaput it shows 5.2 volts when it should give 15.6 dc 500 mA 7.5VA

I cracked it open and suspect the filter cap is gone  :box:

Checked diodes etc .

Question is it has 100uf 35v cap. (output)

As i do not have 100uf caps at that voltage atm but larger ones 1000 uf. Can i use one of those ? :scared:

Title: Re: Repairing a drill battery charger.
Post by: MomirPeh on December 03, 2017, 08:30:40 pm

Hi there,

Any pictures? That would help a lot to figure out what kind of power supply we have there. Is it switching power supply or a linear one. Does it have any charging control circuit (dedicated or MCU based). After we found out that, we can try to troubleshoot it step by step.

Title: Re: Repairing a drill battery charger.
Post by: grifftech on December 04, 2017, 07:02:20 pm

What type of battery does it use?

Title: Re: Repairing a drill battery charger.
Post by: Bashstreet on December 04, 2017, 09:07:40 pm

Quote from: grifftech on December 04, 2017, 07:02:20 pm

What type of battery does it use?

Thank you for answering.

I am now using another power supply as i found out the linear transformer was the issue
I discarded it as non feasible repair.  :horse: