Faulty car battery charger
wb
plugged in, with a flash coming regularly every couple of seconds
(from a fuse-like bulb located on top of the coil (cover off)).
It's a good enough charger when it's working, with boost/fast start as
well as trickle; it also has an automatic cut-out to prevent
over-charging. With the cover off, there does not seem to be any
obvious short.
Any ideas?
Paul King
Long distance diagnosis of this sort is impossible without greater
information ... What make/model is the charger? When was the last time you
used it and "knew" it to work? Why do you have the top off and what leads
you to think its faulty? Is not the battery screwed perhaps, leading to the
charger shutting down due to overcurrent?
--
paul....@theobviousdsl.pipex.com
Reply address is spamtrapped. Remove theobvious for valid e-mail address
wb
<paul....@theobviousdsl.pipex.com> wrote:
>wb wrote:
>> My battery charger seems to be faulty - cutting out as soon as it is
>> plugged in, with a flash coming regularly every couple of seconds
>> (from a fuse-like bulb located on top of the coil (cover off)).
>> It's a good enough charger when it's working, with boost/fast start as
>> well as trickle; it also has an automatic cut-out to prevent
>> over-charging. With the cover off, there does not seem to be any
>> obvious short.
>> Any ideas?
>
>Long distance diagnosis of this sort is impossible without greater
>information ... What make/model is the charger? When was the last time you
>used it and "knew" it to work? Why do you have the top off and what leads
>you to think its faulty? Is not the battery screwed perhaps, leading to the
>charger shutting down due to overcurrent?
It's a "GUNSON's Rapid Start Heavy Duty Starting Charger suitable for
all 12v Lead/Acid batteries
Start: 47A RMS 30A DC @ 9v (10-15 secs)
Boost: 26A RMS 17A DC @ 12v (10 minutes)
Fast: 15A RMS 10A DC @ 12v (continuous)
Recommended minimum battery capacity: 30Ah.
Full overload protection,
Reverse polarity protection.
Thermal cut-out protection."
I last used it at Christmas to quick start my car battery; it worked
fine. My son put it on an old (12v) battery he had been using for an
electric fence for his chickens (does not need full 12 volts). He
noted it flashing a making a pulsing clicking sound. I then tried it
on a working forklift battery with the same result.
I took the top off to check for any obvious shorting or dampness. I
have never noticed it flashing prior to this. Needless to say, I
can't find the instructions anywhere.
big...@meeow.co.uk
post the circuit diagram for us, get ready with the multimeter, and
we'll see if we can take you through it.
NT
Pete Cross
Inside at the front is a printed circuit board with a large relay underneath
it, yes ? towards one corner ( same side as the start/boost switch towards
rear of pcb ) there is a small 10uF 25v electrolytic capacitor which will be
dried up and open circuit. This causes the relay to quickly pulse on/off
instead of coming on until the battery reaches a high enough voltage. Also
the green 12v bulb on the front panel which is lit all the time a battery is
connected had gone ( spare xmas tree bulb fitted fine ).
--
Pete Cross
wb
>wb wrote:
>> On Tue, 15 Feb 2005 01:40:12 -0000, "Paul King"
>> <paul....@theobviousdsl.pipex.com> wrote:
>>
>> >wb wrote:
>> >> My battery charger seems to be faulty - cutting out as soon as it
>is
>> >> plugged in, with a flash coming regularly every couple of seconds
>> >> (from a fuse-like bulb located on top of the coil (cover off)).
>
>post the circuit diagram for us, get ready with the multimeter, and
>we'll see if we can take you through it.
>
>NT
Sorry, I've no circuit diagram but I've posted some photos here:
http://fr.pg.photos.yahoo.com/ph/todayjustfor/album?.dir=/c9de
Hope this helps.
I think my charger is an older one than Pete suggests
Regards
big...@meeow.co.uk
> >> >> My battery charger seems to be faulty - cutting out as soon as
it
> >is
> >> >> plugged in, with a flash coming regularly every couple of
seconds
> >> >> (from a fuse-like bulb located on top of the coil (cover off)).
> >post the circuit diagram for us, get ready with the multimeter, and
> >we'll see if we can take you through it.
> Sorry, I've no circuit diagram but I've posted some photos here:
>
> http://fr.pg.photos.yahoo.com/ph/todayjustfor/album?.dir=/c9de
>
> Hope this helps.
Certainly brought a smile to my face
wb
>
>> >post the circuit diagram for us, get ready with the multimeter, and
>> >we'll see if we can take you through it.
>
>
>> Sorry, I've no circuit diagram but I've posted some photos here:
>>
>> http://fr.pg.photos.yahoo.com/ph/todayjustfor/album?.dir=/c9de
>>
>> Hope this helps.
>
>
>Certainly brought a smile to my face
Glad to hear it NT, which is more than can be said for my son's
chickens - they got a visit from the fox last night - left nothing but
a few feathers!
I'd be grateful for any suggestions (about the charger, not the fox!).
I have the technology (ie multimeter) but not the knowledge
(self-evident!).
Regards
big...@meeow.co.uk
> >> >post the circuit diagram for us, get ready with the multimeter,
and
> >> >we'll see if we can take you through it.
> >
> >
> >> Sorry, I've no circuit diagram but I've posted some photos here:
> >>
> >> http://fr.pg.photos.yahoo.com/ph/todayjustfor/album?.dir=/c9de
> >>
> >> Hope this helps.
> >
> >
> >Certainly brought a smile to my face
> I'd be grateful for any suggestions (about the charger, not the
fox!).
> I have the technology (ie multimeter) but not the knowledge
> (self-evident!).
Well I made it, but I guess I wasnt clear enough.
1. your charger is faulty
2. the only way youre giong to fix it is with a circuit diagram and
some electronics expertise.
3. You can borrow the latter off the net, but you'll have to come up
with the circuit diagram.
Otherwise youre outta luck.
NT
Pete C
wrote:
Hi,
Does it cut out even when no battery is connected?
If so switch off and try disconnecting one of the wires from the
secondary (non mains) side of the transformer that go to the black box
on the heatsink.
Then does it still cut out?
If so it's likely to be a short in the transformer which is probably
not worth replacing, if not it's likely to be the black box (bridge
rectifier) on the heatsink which should be fairly cheap and easy to
replace.
cheers,
Pete.
wb
wrote:
>On Wed, 16 Feb 2005 13:47:18 +0000, wb <no...@nowhereatall.co.uk>
>wrote:
>>>
>>>> Sorry, I've no circuit diagram but I've posted some photos here:
>>>>
>>>> http://fr.pg.photos.yahoo.com/ph/todayjustfor/album?.dir=/c9de
>>>>
snip
>
>Does it cut out even when no battery is connected?
>
>If so switch off and try disconnecting one of the wires from the
>secondary (non mains) side of the transformer that go to the black box
>on the heatsink.
>
>Then does it still cut out?
>
>If so it's likely to be a short in the transformer which is probably
>not worth replacing, if not it's likely to be the black box (bridge
>rectifier) on the heatsink which should be fairly cheap and easy to
>replace.
>
>cheers,
>Pete.
Thanks Pete,
It does cut out when no battery is connected but doesn't when I
disconnect either wire going to the black box from the transformer.
So, hopefully, a new bridge rectifier will solve my problem. Is this
the sort of thing I can get at Maplins - I've had a look but none has
the same markings as mine: AC BR354 A 38
I'd be grateful for any pointers on this one. Many thanks for your
help thus far.
Regards,
Brian
The Natural Philosopher
Any 10A 40V or better bridge rectifier will work.
Often found on e-bay.
Pete C
wrote:
>It does cut out when no battery is connected but doesn't when I
>disconnect either wire going to the black box from the transformer.
>So, hopefully, a new bridge rectifier will solve my problem. Is this
>the sort of thing I can get at Maplins - I've had a look but none has
>the same markings as mine: AC BR354 A 38
>I'd be grateful for any pointers on this one. Many thanks for your
>help thus far.
Hi,
Looks like a 'BR354' is a 35A 400V spec:
<http://www.alldatasheet.com/datasheet-pdf/view/RECTRON/BR354.html>
Maplins do a 'KBPC3504' which has the same spec, for £1.29:
<http://www.maplin.co.uk/Module.aspx?ModuleNo=19088&TabID=2&WorldID=&doy=21m2>
Looking at a data sheet it's the same size with the same type
terminals too:
<http://www.alldatasheet.com/datasheet-pdf/view/SEMTECH/KBPC3504.html>
When fitting the new one be sure the AC terminals marked '~' are
connected to either lead from the transformer, and the DC terminals
'+'/'-' are connected to the appropriate outputs of the charger.
If you take the old one off and measure the resistance each way across
adjacent terminals, you should find that 3 of the 4 diodes only show
resistance one way, but one doesn't show resistance either way which
proves it's defective.
cheers,
Pete.
wb
>Looks like a 'BR354' is a 35A 400V spec:
>
><http://www.alldatasheet.com/datasheet-pdf/view/RECTRON/BR354.html>
>
>Maplins do a 'KBPC3504' which has the same spec, for £1.29:
>
><http://www.maplin.co.uk/Module.aspx?ModuleNo=19088&TabID=2&WorldID=&doy=21m2>
>
>Looking at a data sheet it's the same size with the same type
>terminals too:
>
><http://www.alldatasheet.com/datasheet-pdf/view/SEMTECH/KBPC3504.html>
>
>When fitting the new one be sure the AC terminals marked '~' are
>connected to either lead from the transformer, and the DC terminals
>'+'/'-' are connected to the appropriate outputs of the charger.
>
>If you take the old one off and measure the resistance each way across
>adjacent terminals, you should find that 3 of the 4 diodes only show
>resistance one way, but one doesn't show resistance either way which
>proves it's defective.
>
>cheers,
>Pete.
Pete,
Spot on in every respect. You're a real Sherlock!
Many thanks and best wishes,
Brian
john O.
I have same problem. there is a short cct across croc clips which shorts the
battery out.
instantly the leads current is enough to operate the bi-metalic cut-out. which
then flips in and out.
Think the output rectifier is fauly, (only half wave?) but can find no diagram
to replace it.
--
posted from
http://www.homeownershub.com/uk-diy/faulty-car-battery-charger-153424-.htm
tabb...@gmail.com
> replying to wb, john O. wrote:
> I have same problem. there is a short cct across croc clips which shorts the
> battery out.
> instantly the leads current is enough to operate the bi-metalic cut-out. which
> then flips in and out.
> Think the output rectifier is fauly, (only half wave?) but can find no diagram
> to replace it.
http://wiki.diyfaq.org.uk/index.php/Newsgroup_access_tips
A circuit diagram would help, or even a clear pic of the circuit board.
NT
Peter Parry
I think he might have bought a new one by now.
Mr Pounder Esquire
James Wilkinson
--
The easiest way to find something lost around the house is to buy a replacement.
tabb...@gmail.com
> >On Friday, 8 July 2016 17:44:04 UTC+1, john O. wrote:
>
> >Try a functional user interface:
> >http://wiki.diyfaq.org.uk/index.php/Newsgroup_access_tips
> >
> >A circuit diagram would help, or even a clear pic of the circuit board.
> >
>
> original posted on February 15, 2005, 12:55 am
>
> I think he might have bought a new one by now.
NT
Andy Burns
> Peter Parry wrote:
>
>> original posted on February 15, 2005, 12:55 am
>
<http://al.howardknight.net/msgid.cgi?ID=146800714800>
Mr Pounder Esquire
> On Fri, 08 Jul 2016 20:36:26 +0100, Mr Pounder Esquire
> <MrPo...@rationalthought.com> wrote:
>> Peter Parry wrote:
>>> On Fri, 8 Jul 2016 10:36:37 -0700 (PDT), tabb...@gmail.com wrote:
>>>
>>>> On Friday, 8 July 2016 17:44:04 UTC+1, john O. wrote:
>>>
>>>> Try a functional user interface:
>>>> http://wiki.diyfaq.org.uk/index.php/Newsgroup_access_tips
>>>>
>>>> A circuit diagram would help, or even a clear pic of the circuit
>>>> board.
>>>>
>>>
>>> original posted on February 15, 2005, 12:55 am
>>>
>>> I think he might have bought a new one by now.
>>
>> How do you get the date?
>
> Try using a computer made in the current century. If you can afford
> one.
tabb...@gmail.com
> > Peter Parry wrote:
> >
> >> original posted on February 15, 2005, 12:55 am
> >
> > He posted it about 2 hours ago.
>
> John O might have, but wb didn't
James Wilkinson
--
Interesting fact number 184:
In ancient China, people committed suicide by eating a pound of salt.
Peter Parry
<MrPo...@RationalThought.com> wrote:
>How do you get the date?
http://www.homeownershub.com/uk-diy/faulty-car-battery-charger-153424-.htm
alan_m
>
> How do you get the date?
>
>
the date when question was posted. Most of us are using Usenet servers
and a newsreader client and therefore only see the current conversations.
Users of homeownerhub don't seem realise that many of the questions they
are answering are decades old and with the complete lack of quoting from
the original question their answers become somewhat cryptic when viewed
in our environment.
--
mailto: news {at} admac {dot] myzen {dot} co {dot} uk
James Wilkinson
> On 22:53 8 Jul 2016, James Wilkinson wrote:
>
>> On Fri, 08 Jul 2016 22:16:35 +0100, Mr Pounder Esquire
>> <MrPo...@rationalthought.com> wrote:
>>
>>> James Wilkinson wrote:
>>>> On Fri, 08 Jul 2016 20:36:26 +0100, Mr Pounder Esquire
>>>> <MrPo...@rationalthought.com> wrote:
>>>>> Peter Parry wrote:
>>>>>> On Fri, 8 Jul 2016 10:36:37 -0700 (PDT), tabb...@gmail.com
>>>>>> wrote:
>>>>>>
>>>>>>> On Friday, 8 July 2016 17:44:04 UTC+1, john O. wrote:
>>>>>>
>>>>>>> Try a functional user interface:
>>>>>>> http://wiki.diyfaq.org.uk/index.php/Newsgroup_access_tips
>>>>>>>
>>>>>>> A circuit diagram would help, or even a clear pic of the
>>>>>>> circuit board.
>>>>>>>
>>>>>>
>>>>>> original posted on February 15, 2005, 12:55 am
>>>>>>
>>>>>> I think he might have bought a new one by now.
>>>>>
>>>>> How do you get the date?
>>>>
>>>> Try using a computer made in the current century. If you can
>>>> afford one.
>>>
>>> Some very bad things are coming your way Hucker.
>>
>> Your wife?
>
Well if he's going to be vague....
--
Never use a long word when a diminutive one will do.