Dell

G

GregS

Guest
Got a Dell computer with something called a 110 Twin Alert.
This little board on the top of the chassis is shutting down the power
supply. I thought it might have been some kind of temperature
alert gone bad. Got Got some power circuitry with a beeper.
??

greg
 
On Tue, 28 Apr 2009 18:21:38 GMT, zekfrivo@zekfrivolous.com (GregS)
put finger to keyboard and composed:

Got a Dell computer with something called a 110 Twin Alert.
This little board on the top of the chassis is shutting down the power
supply. I thought it might have been some kind of temperature
alert gone bad. Got Got some power circuitry with a beeper.
??

greg
Click to expand...
Could it be this warning device with a 110dBa sounder and a low
wattage speaker?
http://www.pyronix.com/pdf/Data0305%20TwinA.pdf

The pinouts are:

Symbol Description
----------------------------
- 0V
+ 12V
BA Siren Trigger
SPK Speaker
T Tamper
T Tamper

I can't see how it would be responsible for shutting down your power
supply, though.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
 
In article <kmnev4hk52gb87gdhp9gjuccoh6lnccnfu@4ax.com>, fzabkar@iinternode.on.net wrote:
On Tue, 28 Apr 2009 18:21:38 GMT, zekfrivo@zekfrivolous.com (GregS)
put finger to keyboard and composed:

Got a Dell computer with something called a 110 Twin Alert.
This little board on the top of the chassis is shutting down the power
supply. I thought it might have been some kind of temperature
alert gone bad. Got Got some power circuitry with a beeper.
??

greg

Could it be this warning device with a 110dBa sounder and a low
wattage speaker?
http://www.pyronix.com/pdf/Data0305%20TwinA.pdf

The pinouts are:

Symbol Description
----------------------------
- 0V
+ 12V
BA Siren Trigger
SPK Speaker
T Tamper
T Tamper

I can't see how it would be responsible for shutting down your power
supply, though.
Click to expand...
Thats was interesting.
I will post a picture later.

greg
 
In article <gt7nse$ru7$3@usenet01.srv.cis.pitt.edu>, zekfrivo@zekfrivolous.com (GregS) wrote:
In article <kmnev4hk52gb87gdhp9gjuccoh6lnccnfu@4ax.com>,
fzabkar@iinternode.on.net wrote:
On Tue, 28 Apr 2009 18:21:38 GMT, zekfrivo@zekfrivolous.com (GregS)
put finger to keyboard and composed:

Got a Dell computer with something called a 110 Twin Alert.
This little board on the top of the chassis is shutting down the power
supply. I thought it might have been some kind of temperature
alert gone bad. Got Got some power circuitry with a beeper.
??

greg

Could it be this warning device with a 110dBa sounder and a low
wattage speaker?
http://www.pyronix.com/pdf/Data0305%20TwinA.pdf

The pinouts are:

Symbol Description
----------------------------
- 0V
+ 12V
BA Siren Trigger
SPK Speaker
T Tamper
T Tamper

I can't see how it would be responsible for shutting down your power
supply, though.


Thats was interesting.
I will post a picture later.

greg
Click to expand...
So here is a picture. I think its just a temp warning beeper that went bad and shorting out
supply. Weird.

http://zekfrivolous.com/misc/twinalert.JPG

greg
 
On Wed, 29 Apr 2009 15:50:59 GMT, zekfrivo@zekfrivolous.com (GregS)
put finger to keyboard and composed:

In article <gt7nse$ru7$3@usenet01.srv.cis.pitt.edu>, zekfrivo@zekfrivolous.com (GregS) wrote:
In article <kmnev4hk52gb87gdhp9gjuccoh6lnccnfu@4ax.com>,
fzabkar@iinternode.on.net wrote:
On Tue, 28 Apr 2009 18:21:38 GMT, zekfrivo@zekfrivolous.com (GregS)
put finger to keyboard and composed:

Got a Dell computer with something called a 110 Twin Alert.
This little board on the top of the chassis is shutting down the power
supply. I thought it might have been some kind of temperature
alert gone bad. Got Got some power circuitry with a beeper.
??

greg

Could it be this warning device with a 110dBa sounder and a low
wattage speaker?
http://www.pyronix.com/pdf/Data0305%20TwinA.pdf

So here is a picture. I think its just a temp warning beeper that went bad and shorting out
supply. Weird.

http://zekfrivolous.com/misc/twinalert.JPG

greg
Click to expand...
It looks like the Pyronix device is something completely different.
How do both trademarks coexist ???

Here is a PC Power & Cooling alarm that is similar to yours.

110 Alert Heat Alarm:
http://www.pcpower.com/accessories/110-alert-heat-alarm.html

It is set to go off when the temperature reaches 110 deg F. It doesn't
appear to do anything other than alert the user, though.

OTOH your device appears to shut down the PSU. You can see the
thermistor below the second M in the LM339M quad comparator. Could
that be a crowbar SCR across the +12V or +5V input? What are the two
large parts at the RHS of the PCB?

The only useful reference I can find to TwinAlert with Google is this
one:
http://www.kaldata.com/forums/index.php?showtopic=26035&st=30

This is a Google translation:
================================================================
Sensory devices for heat

Thus, this problem could be avoided entirely by using the company's
110 Twinalert PC Power and Cooling Systems. Twinalert represents 110
bus to the size of a credit card that is connected to the plug such as
power flopito. When the temperature in the PC-it reaches 43 degrees,
the device starts to squeak, creating annoying noise, and in 47
degrees just excludes computer. It cost under $ 50 ...
================================================================

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
 
GregS wrote:

zekfrivo@zekfrivolous.com (GregS) wrote:
fzabkar@iinternode.on.net wrote:
On Tue, 28 Apr 2009 18:21:38 GMT, zekfrivo@zekfrivolous.com (GregS)
put finger to keyboard and composed:

Got a Dell computer with something called a 110 Twin Alert.
This little board on the top of the chassis is shutting down the power
supply. I thought it might have been some kind of temperature
alert gone bad. Got Got some power circuitry with a beeper.
??


Could it be this warning device with a 110dBa sounder and a low
wattage speaker?
http://www.pyronix.com/pdf/Data0305%20TwinA.pdf

The pinouts are:

Symbol Description
----------------------------
- 0V
+ 12V
BA Siren Trigger
SPK Speaker
T Tamper
T Tamper

I can't see how it would be responsible for shutting down your power
supply, though.


Thats was interesting.
I will post a picture later.

So here is a picture. I think its just a temp warning beeper that went bad and shorting out
supply. Weird.

http://zekfrivolous.com/misc/twinalert.JPG
Click to expand...
LM339 is a quad comparator. The board is also legended 'power and cooling'. I'd guess it
monitors temp and several supplies.

Graham
 
GregS wrote:
In article <gt7nse$ru7$3@usenet01.srv.cis.pitt.edu>, zekfrivo@zekfrivolous.com (GregS) wrote:
In article <kmnev4hk52gb87gdhp9gjuccoh6lnccnfu@4ax.com>,
fzabkar@iinternode.on.net wrote:
On Tue, 28 Apr 2009 18:21:38 GMT, zekfrivo@zekfrivolous.com (GregS)
put finger to keyboard and composed:

Got a Dell computer with something called a 110 Twin Alert.
This little board on the top of the chassis is shutting down the power
supply. I thought it might have been some kind of temperature
alert gone bad. Got Got some power circuitry with a beeper.
??

greg
Could it be this warning device with a 110dBa sounder and a low
wattage speaker?
http://www.pyronix.com/pdf/Data0305%20TwinA.pdf

The pinouts are:

Symbol Description
----------------------------
- 0V
+ 12V
BA Siren Trigger
SPK Speaker
T Tamper
T Tamper

I can't see how it would be responsible for shutting down your power
supply, though.

Thats was interesting.
I will post a picture later.

greg

So here is a picture. I think its just a temp warning beeper that went bad and shorting out
supply. Weird.

http://zekfrivolous.com/misc/twinalert.JPG
Click to expand...
It looks like it's monitoring the temperature (there's a thermistor on
the bottom right of the PCB). I notice that it has a local regulator,
which I'd be guessing is a 7805 that's shorted out.

--
W
. | ,. w , "Some people are alive only because
\|/ \|/ it is illegal to kill them." Perna condita delenda est
---^----^---------------------------------------------------------------
 
On Thu, 30 Apr 2009 19:44:02 +1000, Bob Larter <bobbylarter@gmail.com>
put finger to keyboard and composed:

http://zekfrivolous.com/misc/twinalert.JPG

It looks like it's monitoring the temperature (there's a thermistor on
the bottom right of the PCB). I notice that it has a local regulator,
which I'd be guessing is a 7805 that's shorted out.
Click to expand...
The pinout for a 7805, from top to bottom, is "In Gnd Out". This
doesn't fit with the "+12V Gnd Gnd +5V" pinout of a drive connector.
In any case why would you need a local +5V regulator when the incoming
supply already provides +5V? If for some reason you did need a +5V
regulator, then wouldn't a 78L05 be adequate for this circuit?

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
 
Franc Zabkar wrote:

On Thu, 30 Apr 2009 19:44:02 +1000, Bob Larter <bobbylarter@gmail.com
put finger to keyboard and composed:

http://zekfrivolous.com/misc/twinalert.JPG

It looks like it's monitoring the temperature (there's a thermistor on
the bottom right of the PCB). I notice that it has a local regulator,
which I'd be guessing is a 7805 that's shorted out.

The pinout for a 7805, from top to bottom, is "In Gnd Out". This
doesn't fit with the "+12V Gnd Gnd +5V" pinout of a drive connector.
In any case why would you need a local +5V regulator when the incoming
supply already provides +5V? If for some reason you did need a +5V
regulator, then wouldn't a 78L05 be adequate for this circuit?
Click to expand...
That heatinked device seems rather odd, not least the way it's mounted with
bent leads.

Graham
 
Franc Zabkar wrote:
On Thu, 30 Apr 2009 19:44:02 +1000, Bob Larter <bobbylarter@gmail.com
put finger to keyboard and composed:

http://zekfrivolous.com/misc/twinalert.JPG
It looks like it's monitoring the temperature (there's a thermistor on
the bottom right of the PCB). I notice that it has a local regulator,
which I'd be guessing is a 7805 that's shorted out.

The pinout for a 7805, from top to bottom, is "In Gnd Out". This
doesn't fit with the "+12V Gnd Gnd +5V" pinout of a drive connector.
In any case why would you need a local +5V regulator when the incoming
supply already provides +5V? If for some reason you did need a +5V
regulator, then wouldn't a 78L05 be adequate for this circuit?
Click to expand...
<looks again>

Yeah, you're right about it not being a 78xx reg. I must've been a bit
slydexic when I first looked at it.

--
W
. | ,. w , "Some people are alive only because
\|/ \|/ it is illegal to kill them." Perna condita delenda est
---^----^---------------------------------------------------------------
 
You must log in or register to reply here.

Welcome to EDABoard.com

Sponsor

Back
Top