Help needed Identifying this resistor Black & Decker Drill Charger
 

Hi All,

On looking to use my drill for some Diy this weekend I plugged in the battery to the charger and it smoked, the drill model is HP188F2B..I managed to open the charger, and discovered this blue resistor in the picture has blown..

Having looked around the web it seems it is a common problem with this drill/charger..

The first picture is a web find of the Resistor.

Now i need to find it's Equivalent or a higher tolerance.

Many thanks.

Re: Help needed Identifying this resistor Black & Decker Drill Charger
 

That looks like a fusible resistor to me. What colour are the bands on it?

It will have blown for a reason and you should not assume that replacing it will fix the problem.

Re: Help needed Identifying this resistor Black & Decker Drill Charger
 

i would imagine that's a current limit resistor, I think this is a simplified linear charger. I suspect it leads a hard life and has simply thrown in the towel. Does the charger itself have a part number?

Re: Help needed Identifying this resistor Black & Decker Drill Charger
 

Sir, did you check Q6 ?

Re: Help needed Identifying this resistor Black & Decker Drill Charger
 

Hi, thank you for the replies,

When I plugged the battery in the charger it started smoking, so straight away I unplugged and took the charger apart.

The only part that was hot and burnt was this resistor, so I was thinking just a straight swap job once I identified the part. Would you recommend upping the value?

Regards.

Re: Help needed Identifying this resistor Black & Decker Drill Charger
 

Your best bet is to find someone who has a drill charger with an undamaged resistor who can read the colour code from the resistor. This will enable you to determine its value.

I'll hazard a guess at Brown, Brown, Black which is 110R.

Where does the resistor sit in the circuit? I'm guessing that the leads T+, T-, B+ and B- go to the battery. Is the resistor wired in series with one of these leads?

Re: Help needed Identifying this resistor Black & Decker Drill Charger
 

Looks like a 1.1 ohm 3W or 5W to me.

As stated, they blow for a reason - could be you've got a dud battery - but simply replacing at isn't the answer.

Re: Help needed Identifying this resistor Black & Decker Drill Charger
 

Is that resistor actually open circuit (have you measured it?) or just discoloured through heat? It might still read its value or something close.
Can't properly make out the colours in the first photo but, seem to me, to be brown brown black.

Re: Help needed Identifying this resistor Black & Decker Drill Charger
 

I would not spend too much time on a cordless tool.
Has the battery been checked to make sure it is not short circuit?
Last time I had a battery go feeble a replacement was twice the price of a complete brand new tool from Aldi. I chucked another one into the basket for a second battery.
The cells alone cost more than a new tool.

Re: Help needed Identifying this resistor Black & Decker Drill Charger
 

You will have more problems than the resistor, really not worth fixing if the tool/battery is more than a few years old, especially if it is NiCad. Even NiMH is barely worth keeping now.

Re: Help needed Identifying this resistor Black & Decker Drill Charger
 

(If your drill is older and the battery pack is NiCd and worn out, you can make a new one using 'sub-C' sized replacement cells but as folks have said this tends to be a bit pricey. I've had cheaper, good results using 'Floureon' brand pattern batteries for my older 18v Makita drill-driver, bought ready-assembled from ebay).

Re: Help needed Identifying this resistor Black & Decker Drill Charger
 

Thanks everybody for the advice, I'll just get a new drill..prob was something wrong with
Battery to cause it to burn out..The Resistor is open circuit as i said before it seems like a few people have had the same problem with this model of drill..so best to buy a new one.

Many thanks for the advice and tips.