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Battery automatic cut off function

A

Andy

Jan 1, 1970
0
I have a wireless portable sound system call a Paso 500 (http://
www.pasosound.com/wpcs50.shtml). Its a great unit but it has an auto
battery cut off when the battery starts going flat. Sounds ok but it
really can cut out waaaaay before its due time. The same battery it
cuts out will play on another brand's unit perfectly. My question is,
can I remove this function and or can I adjust the cut off threshold
for it.

Thanks,
Andy
 
D

Dave Plowman (News)

Jan 1, 1970
0
I have a wireless portable sound system call a Paso 500 (http://
www.pasosound.com/wpcs50.shtml). Its a great unit but it has an auto
battery cut off when the battery starts going flat. Sounds ok but it
really can cut out waaaaay before its due time. The same battery it
cuts out will play on another brand's unit perfectly. My question is,
can I remove this function and or can I adjust the cut off threshold
for it.

Probably to keep it on frequency, etc. That another brand works to a lower
voltage is neither here or there.
 
A

Andy

Jan 1, 1970
0
Probably to keep it on frequency, etc. That another brand works to a lower
voltage is neither here or there.

--
*Vegetarians taste great*

Dave Plowman [email protected] London SW
To e-mail, change noise into sound.

None the less I would love to know how to by pass it. It really isnt a
good feature. It can cut off after 40 min. Any help would be great.

Andy
 
R

Ron(UK)

Jan 1, 1970
0
Andy said:
None the less I would love to know how to by pass it. It really isnt a
good feature. It can cut off after 40 min. Any help would be great.

Andy
Is it possible that you are using low quality or unsuitable batteries?

Ron(UK)
 
A

Andy

Jan 1, 1970
0
Andy said:
Is it possible that you are using low quality or unsuitable batteries?

Ron(UK)

No the batt is new and this model has a reputation on cutting out. The
main problem is it really comes underpowered, it comes with a non
standard size 2.5AH batt. I have spares and can easily replace it when
it cuts out but I am a performer and if it cuts out mid song, my show
really goes to shit. Can anyone tell me if its possible to by-pass
this cut off feature and how to do it? I have ask the company for a
technician repair manual but they refused. Any help please.

Andy
 
D

Dave Plowman (News)

Jan 1, 1970
0
No the batt is new and this model has a reputation on cutting out. The
main problem is it really comes underpowered, it comes with a non
standard size 2.5AH batt. I have spares and can easily replace it when
it cuts out but I am a performer and if it cuts out mid song, my show
really goes to shit. Can anyone tell me if its possible to by-pass
this cut off feature and how to do it? I have ask the company for a
technician repair manual but they refused. Any help please.

Well I use radio mics for a living and I always replace the batteries
before they fail. You get to know how long they last. It sounds like this
battery is running a power amp so the life will vary with load. So replace
it for the worse condition. I'd say it's likely they have a very good
reason for this auto cutoff at this battery voltage. You can't just magic
that reason away. If the life isn't long enough use a larger external
battery.
 
A

Andy

Jan 1, 1970
0
Well I use radio mics for a living and I always replace the batteries
before they fail. You get to know how long they last. It sounds like this
battery is running a power amp so the life will vary with load. So replace
it for the worse condition. I'd say it's likely they have a very good
reason for this auto cutoff at this battery voltage. You can't just magic
that reason away. If the life isn't long enough use a larger external
battery.

--
*If you don't pay your exorcist you get repossessed.*

Dave Plowman [email protected] London SW
To e-mail, change noise into sound.


Can anyone answer my question though. I fully understand the situation
(I shouldnt do it, its under powered, its there for a reason). Let me
just start again as people are getting hung up on the background. here
another scenario: "A person made an amp with an auto batt cut off and
I purchased it and wanted to remove it".
 
A

Arfa Daily

Jan 1, 1970
0
Andy said:
Can anyone answer my question though. I fully understand the situation
(I shouldnt do it, its under powered, its there for a reason). Let me
just start again as people are getting hung up on the background. here
another scenario: "A person made an amp with an auto batt cut off and
I purchased it and wanted to remove it".

OK then. How does it cut off ? Is the power to the main board controlled via
a relay, that opens when it detects the low battery condition ? Or does it
just cut off silently ? If the former, then it is easy enough to just short
the relay conatcts. If the latter, then you need to locate the switching
transistor that controls the feed. This should not be too difficult. I would
expect it to be either one of the larger D-line package transistors at a
minimum, or some type of flatpak package like a TO220. It should be easy
enough to follow the battery "+" around the board until you arrive at such a
transistor. Once found, it should only be necessary to short its collector
and emitter pins, to effect a bypass. If you want to get a bit cleverer,
locate the sensing circuit, which is likely based on either an opamp wired
as a comparator, or an actual comparator IC, and alter the threshold set
point resistor(s)

Arfa
 
A

Andy

Jan 1, 1970
0
OK then. How does it cut off ? Is the power to the main board controlled via
a relay, that opens when it detects the low battery condition ? Or does it
just cut off silently ? If the former, then it is easy enough to just short
the relay conatcts. If the latter, then you need to locate the switching
transistor that controls the feed. This should not be too difficult. I would
expect it to be either one of the larger D-line package transistors at a
minimum, or some type of flatpak package like a TO220. It should be easy
enough to follow the battery "+" around the board until you arrive at such a
transistor. Once found, it should only be necessary to short its collector
and emitter pins, to effect a bypass. If you want to get a bit cleverer,
locate the sensing circuit, which is likely based on either an opamp wired
as a comparator, or an actual comparator IC, and alter the threshold set
point resistor(s)

Arfa

Hi Arfa,
Your the man. I am not too versed in electronics but it does make an
very audiable noise when it cuts out and also when it resets. How is
the cut off adjusted?? I will rip it apart today and locate the items.
can I email you direct. I am more tha n willing to pay you for your
time and/or send you some products (www.ourlittlestore.com - we do
magic items.)
Thanks,
Andy
 
A

Arfa Daily

Jan 1, 1970
0
Andy said:
Hi Arfa,
Your the man. I am not too versed in electronics but it does make an
very audiable noise when it cuts out and also when it resets. How is
the cut off adjusted?? I will rip it apart today and locate the items.
can I email you direct. I am more tha n willing to pay you for your
time and/or send you some products (www.ourlittlestore.com - we do
magic items.)
Thanks,
Andy

Yes, you can e-mail me direct. Use the account which I used to post this.

Arfa
 
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