[TechAssist] Re: Charging Circuit--Riobi 14.4 drill Charger
- From: Gary McCartney <gary@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Thu, 23 Sep 2004 09:27:32 -0400
Speaking of drill chargers, I have one here that I need to replace the
power transformer in it. The primary is open and no thermo fuse. The
drill is a Mastercraft (Canadian Tire, ED- your favourite :) ). How do I
know what secondary voltage to use? The drill is a 14.4V. Off hand, I
would think that around 18V to 20V winding would be about right. The
filter cap on the circuit board is rated 35V. Any ideas?
Now to satisfy the "pitch it and buy new theory", this drill belongs to
a guy who lets me throw all my scrap electronics into his garbage bin in
return for repairing a few things he brings in. I at least need to put
in an effort on these items. In this case I do have a number of power
transformers sitting around doing nothing so parting with one is not a
big deal and it woulf keep me in good company with the bin.
Gary McCartney
McCartney Electronics
Guelph Ontario Canada
Est. 1984
email: gary (at) number63.ca
Edward Gaidies wrote:
> Warren;
> Depending on the Charger, I would presume you have 12.2V from white to
> red, and 12.2V from white red. The white is normally fed back to the
> charger to determine when to go into trickle charge mode. The
> question.....why are you pissing around with this, when you can go to
> Canadian Tire, and buy a Drill with 2 Batteries and a Charger for
> $79.95?:-)
> Reason these Solid State Components have no part numbers on them, is
> because they are not meant to be repaired, and even if there was a part
> number, you don't expect to find a Parts Department for this
> company....do you????
> Come on...Get with the program;-)
> I was using a B&D drill for 7 years, Had Internal NI-CAD battery packs
> (2). When I wanted to replace the battery packs, they were $47 each.
> The new version of this drill was $49 Retail. You must have a Birthday
> coming up, or an Anniversary...Treat yourself...and if you can't find
> your favourite color.....Paint it. HEHE. Typical Canadian.
>
>
> -Ed-
> *****************************************************************
> Ed Gaidies
> Tel-Tek Electronics
> Ontario-Canada
> teltek3@xxxxxxxxxxxx
>
> On 23-Sep-04, at 7:59 AM, Warren C. wrote:
>
>
>>Are you suggesting that this three legged device in the charger is a
>>protector of
>>some kind?
>>A white wire leads to it. The other two wires are red and black of
>>course.
>>When you test for vlotage at the battery itself to this third
>>connector one finds
>>that it is almost at
>>ground potential. It's so stupid when companys take the numbers off
>>parts!! This
>>ticks me off!!
>>
>>Warren C.
>>
>>
>>Roger G wrote:
>>
>>
>>>Third connector usually goes to a thermal protector or some kind of
>>>protector
>>>Roger G.
>>>
>>>Mr. Fix-It
>>>Harrisburg, PA 17110 WebSite- http://mrfixit.netfirms.com
>>>rogerfixit@xxxxxxxx
>>>FAX 510-740-3641; Tel: 717-763-7098 (shop) 717-652-1703(home)
>>>
>>>At 11:19 PM 9/22/2004, you wrote:
>>>
>>>>I hope no one minds this question.
>>>>Does anyone have a circuit diagram of this charging unit. The fast
>>>>charge light does not come on , only the other
>>>>two lights.
>>>>I also would like to know what the third connector on the battery is
>>>>for. When you follow this wire into the charger you come to an output
>>>>devise (transistor??) that has no numbers on it. (figures eah)
>>>>
>>>>My theory is that this devise may be bad and the drill batteries are
>>>>fine.
>>>>BTW the main (-) and (+) connections to the battery are on the left
>>>>and
>>>>right side and they connect fine.
>>>>When you test for voltage in the charger at these two points you get
>>>>a
>>>>reading of 24.6 V
>>>>
>>>>Can you help???
>>>>
>>>>TIA
>>>>
>>>>Warren Campbell
>>>>Campbell's TV & Appliances
>>>>Cannington ON
>>>>
>>>>
>>>>
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