Hello everyone,

I am working on the testing of a unit based on MSP430F169 application. While
testing the unit, i shorted pins 2 and 3 of LM317LZ (TO-92) which is
providing a fixed voltage of 3.5V to the circuit for powering the
processor.

The unit works for a while and in between starts buzzing with an error (on
the display) showing "wrong power adapter connected". I tried to
troubleshoot it by replacing the capacitors and resistors connected to
LM317LZ, but nothing worked out as it still shows me the same error. Even
the power supply required by the processor is good and fixed at 3.5V.

Is there any way of correcting this error? I can provide more details if
required.

Few of the IC's used in design alongwith the processor are:
1) EEPROM 24AA65SM
2) Battery Management IC BQ2000T
3) Dual logic flip flop SN74HC74D

Any help would be of great help.

Thank you!
[Non-text portions of this message have been removed]

------------------------------------



(You need to be a member of msp430 -- send a blank email to msp430-subscribe@yahoogroups.com )

It seems you do not know anything about the circuit and not enough
about electronics.
Whitout the schematics one must be quite experienced to guess (or
know) what these parts are for and how they are connected.
Maybe the BQ2000T offered some protection to the MSP430 otherwise it
would be already toasted after shorting the IN/OUT pins of the
regulator. Something is already toasted.
Messing with regulator adjustment resistors would not help ever.
You are just guessing.
If you do not have anyone else with expertise to handle this unit
for you I would suggest to download the data sheets of all devices in
the board. Read them starting by BQ2000T to understand how it works.
Check if it is working. Try to evaluate the schematics.
But with the knowledge you seems to have I, in my turn, guess you
won't be able to figure out how it works.
Your search for help shows you want to learn. In the other hand I
believe you have a long long path in your way...
On Ter 10/11/09 21:48 , pritam yadav p...@gmail.com sent:
Hello everyone,
I am working on the testing of a unit based on MSP430F169
application. While
testing the unit, i shorted pins 2 and 3 of LM317LZ (TO-92) which is
providing a fixed voltage of 3.5V to the circuit for powering the
processor.
The unit works for a while and in between starts buzzing with an
error (on
the display) showing "wrong power adapter connected". I tried to
troubleshoot it by replacing the capacitors and resistors connected
to
LM317LZ, but nothing worked out as it still shows me the same error.
Even
the power supply required by the processor is good and fixed at
3.5V.
Is there any way of correcting this error? I can provide more
details if
required.
Few of the IC's used in design alongwith the processor are:
1) EEPROM 24AA65SM
2) Battery Management IC BQ2000T
3) Dual logic flip flop SN74HC74D
Any help would be of great help.
Thank you!
[Non-text portions of this message have been removed]

[Non-text portions of this message have been removed]

------------------------------------



(You need to be a member of msp430 -- send a blank email to msp430-subscribe@yahoogroups.com )

Hi,

> I am working on the testing of a unit based on MSP430F169 application.

I'd try to help, but I live in a 3 bedroom unit - not one based on "a
MSP430F169 application".
Perhaps someone here has a unit like you. If it also buzzes (whatever that
means) then with some luck
they can help you.

PS : It would help enormously if you would *at least* tell people what
this unit is.
is it an eval board ? or ? what's this "buzzing display" ? LCD ? or ? did
you design this unit ?
or ? who programmed the "unit" to buzz and display ""wrong power adapter
connected" ? do you know what is supposed to trigger this
"buzzing message" ? or ? why are you replacing components that
disgustingly obviously have NOTHING to do with whatever problem
you're trying to solve ? are you on crack ? etc etc....

No one here will be able to help you if you can't even help yourself....

B rgds
Kris
On Tue, 10 Nov 2009 18:48:43 -0500, pritam yadav
wrote:
> Hello everyone,
>
> I am working on the testing of a unit based on MSP430F169 application.
> While
> testing the unit, i shorted pins 2 and 3 of LM317LZ (TO-92) which is
> providing a fixed voltage of 3.5V to the circuit for powering the
> processor.
>
> The unit works for a while and in between starts buzzing with an error
(on
> the display) showing "wrong power adapter connected". I tried to
> troubleshoot it by replacing the capacitors and resistors connected to
> LM317LZ, but nothing worked out as it still shows me the same error.
Even
> the power supply required by the processor is good and fixed at 3.5V.
>
> Is there any way of correcting this error? I can provide more details if
> required.
>
> Few of the IC's used in design alongwith the processor are:
> 1) EEPROM 24AA65SM
> 2) Battery Management IC BQ2000T
> 3) Dual logic flip flop SN74HC74D
>
> Any help would be of great help.
>
> Thank you!
> [Non-text portions of this message have been removed]
>
> ------------------------------------



(You need to be a member of msp430 -- send a blank email to msp430-subscribe@yahoogroups.com )

Augusto,

I am not much aware about MSP430F169 programming, so i was just wondering if
it might have created any problem to the processor or is it just a fault to
look on the circuit board?

Thanks!

Kris,
My apologizes that i asked so simple question here inorder to save my time
on the testing. Anyways thanks for your suggestions and advice.

On Wed, Nov 11, 2009 at 9:20 AM, wrote:

> Hi,
> > I am working on the testing of a unit based on MSP430F169 application.
>
> I'd try to help, but I live in a 3 bedroom unit - not one based on "a
> MSP430F169 application".
> Perhaps someone here has a unit like you. If it also buzzes (whatever that
> means) then with some luck
> they can help you.
>
> PS : It would help enormously if you would *at least* tell people what
> this unit is.
> is it an eval board ? or ? what's this "buzzing display" ? LCD ? or ? did
> you design this unit ?
> or ? who programmed the "unit" to buzz and display ""wrong power adapter
> connected" ? do you know what is supposed to trigger this
> "buzzing message" ? or ? why are you replacing components that
> disgustingly obviously have NOTHING to do with whatever problem
> you're trying to solve ? are you on crack ? etc etc....
>
> No one here will be able to help you if you can't even help yourself....
>
> B rgds
> Kris
>
> On Tue, 10 Nov 2009 18:48:43 -0500, pritam yadav
> >
> wrote:
>
> > Hello everyone,
> >
> > I am working on the testing of a unit based on MSP430F169 application.
> > While
> > testing the unit, i shorted pins 2 and 3 of LM317LZ (TO-92) which is
> > providing a fixed voltage of 3.5V to the circuit for powering the
> > processor.
> >
> > The unit works for a while and in between starts buzzing with an error
> (on
> > the display) showing "wrong power adapter connected". I tried to
> > troubleshoot it by replacing the capacitors and resistors connected to
> > LM317LZ, but nothing worked out as it still shows me the same error.
> Even
> > the power supply required by the processor is good and fixed at 3.5V.
> >
> > Is there any way of correcting this error? I can provide more details if
> > required.
> >
> > Few of the IC's used in design alongwith the processor are:
> > 1) EEPROM 24AA65SM
> > 2) Battery Management IC BQ2000T
> > 3) Dual logic flip flop SN74HC74D
> >
> > Any help would be of great help.
> >
> > Thank you!
> >
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
> > ------------------------------------
>
> >
> >
> >
> >



(You need to be a member of msp430 -- send a blank email to msp430-subscribe@yahoogroups.com )

Pritam,
My comments were quite hard on your lack of expertise but you have
to understand this: to solve this problem you have to learn more.
Let's see what could happen after the short of the in/out
regulator's pins.
The MSP430 is rated to work at 3.6V and a maximum of 4V in the power
supply pins. I did not check the other component tolerance to
overvoltage.
When the short on regulator happened the input voltage may went to
the MSP. If it was above 4V it could toast the chip.
Since it still alive (showing messages in the display) you probably
has some circuit that dumped the overvoltage or your MSP430 just
lived long enough to keep some parts running. I say this because the
message shows it is reading the input voltage (before the regulator)
and recognize it comes from a wrong power supply adaptor because it
may be too low (or too high). Well, to get in this conclusion the
MSP430 ADC could be damaged or some external circuit would.
Further, the BQ2000T is a battery charge device. It is probably
working well and since it does use the input voltage could be the
designer of your unit did use the BQ also to check or protect the
MSP430 supply rail.
It would not be a general application of this BQ device (and I even
don't know it is possible this way because I did not study it enough)
but it all depends of the designer.
You need to know the circuit, how it measures the input voltage, if
there is some overvoltage protection, if there is another component
sensitive to the overvoltage that could prevent the MSP430 ADC to
read the input voltage correctly.
You post shows you do not know what can happen when the regulator
get its pins shortened.
Without more information I would guess some part of the MSP430 is
already smoked, but perhaps it is working as it should you just have
a low voltage input.
By the way, is it an alredy working product? Or just a prototype
where lots of things could happen like bugs in software or wrong
component values?
Using 3.5V as MSP430 rail is quite unusal.
Good luck.
best regards,
Augusto
On Qua 11/11/09 14:21 , pritam yadav p...@gmail.com sent:
Augusto,
I am not much aware about MSP430F169 programming, so i was just
wondering if
it might have created any problem to the processor or is it just a
fault to
look on the circuit board?
Thanks!
Kris,
My apologizes that i asked so simple question here inorder to save
my time
on the testing. Anyways thanks for your suggestions and advice.
On Wed, Nov 11, 2009 at 9:20 AM, wrote:
>
>
> Hi,
>
>
> > I am working on the testing of a unit based on MSP430F169
application.
>
> I'd try to help, but I live in a 3 bedroom unit - not one based on
"a
> MSP430F169 application".
> Perhaps someone here has a unit like you. If it also buzzes
(whatever that
> means) then with some luck
> they can help you.
>
> PS : It would help enormously if you would *at least* tell people
what
> this unit is.
> is it an eval board ? or ? what's this "buzzing display" ? LCD ?
or ? did
> you design this unit ?
> or ? who programmed the "unit" to buzz and display ""wrong power
adapter
> connected" ? do you know what is supposed to trigger this
> "buzzing message" ? or ? why are you replacing components that
> disgustingly obviously have NOTHING to do with whatever problem
> you're trying to solve ? are you on crack ? etc etc....
>
> No one here will be able to help you if you can't even help
yourself....
>
> B rgds
> Kris
>
> On Tue, 10 Nov 2009 18:48:43 -0500, pritam yadav >
> wrote:
>
> > Hello everyone,
> >
> > I am working on the testing of a unit based on MSP430F169
application.
> > While
> > testing the unit, i shorted pins 2 and 3 of LM317LZ (TO-92)
which is
> > providing a fixed voltage of 3.5V to the circuit for powering
the
> > processor.
> >
> > The unit works for a while and in between starts buzzing with an
error
> (on
> > the display) showing "wrong power adapter connected". I tried to
> > troubleshoot it by replacing the capacitors and resistors
connected to
> > LM317LZ, but nothing worked out as it still shows me the same
error.
> Even
> > the power supply required by the processor is good and fixed at
3.5V.
> >
> > Is there any way of correcting this error? I can provide more
details if
> > required.
> >
> > Few of the IC's used in design alongwith the processor are:
> > 1) EEPROM 24AA65SM
> > 2) Battery Management IC BQ2000T
> > 3) Dual logic flip flop SN74HC74D
> >
> > Any help would be of great help.
> >
> > Thank you!
> >
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
> > ------------------------------------
>
> >
> > [3]
> >
> > [10]
[Non-text portions of this message have been removed]

------------------------------------



(You need to be a member of msp430 -- send a blank email to msp430-subscribe@yahoogroups.com )

Did you measured the volatages on the output pins of the LM317LZ and the BQ2000T ?
--- In m...@yahoogroups.com, pritam yadav wrote:
>
> Hello everyone,
>
> I am working on the testing of a unit based on MSP430F169 application. While
> testing the unit, i shorted pins 2 and 3 of LM317LZ (TO-92) which is
> providing a fixed voltage of 3.5V to the circuit for powering the
> processor.
>
> The unit works for a while and in between starts buzzing with an error (on
> the display) showing "wrong power adapter connected". I tried to
> troubleshoot it by replacing the capacitors and resistors connected to
> LM317LZ, but nothing worked out as it still shows me the same error. Even
> the power supply required by the processor is good and fixed at 3.5V.
>
> Is there any way of correcting this error? I can provide more details if
> required.
>
> Few of the IC's used in design alongwith the processor are:
> 1) EEPROM 24AA65SM
> 2) Battery Management IC BQ2000T
> 3) Dual logic flip flop SN74HC74D
>
> Any help would be of great help.
>
> Thank you!
> [Non-text portions of this message have been removed]
>

------------------------------------



(You need to be a member of msp430 -- send a blank email to msp430-subscribe@yahoogroups.com )

Dear Augusto and Chenli thanks for the replies!

BQ2000T is working fine. The voltage regulator (LMZ317LZ) is giving an
output supply of 3.5V and a voltage divider circuit is there to send 1.8V to
MSP ADC (pin 59 of MSP430F169).

The voltage on pin 59 is still 1.8V and the input voltage of MSP is also 3.5
V.

Unfortunately, there is no protection with the voltage divider circuit used
with the voltage regulator (LMZ317LZ), it goes directly to pin 59 of
microcontroller.

Is there any possible way to fix it?

Augusto,
The product is in use and is running successfully since last one year.

Thank you!

On Thu, Nov 12, 2009 at 1:46 AM, chenli1976 wrote:

> Did you measured the volatages on the output pins of the LM317LZ and the
> BQ2000T ?
> --- In m...@yahoogroups.com , pritam yadav
> wrote:
> >
> > Hello everyone,
> >
> > I am working on the testing of a unit based on MSP430F169 application.
> While
> > testing the unit, i shorted pins 2 and 3 of LM317LZ (TO-92) which is
> > providing a fixed voltage of 3.5V to the circuit for powering the
> > processor.
> >
> > The unit works for a while and in between starts buzzing with an error
> (on
> > the display) showing "wrong power adapter connected". I tried to
> > troubleshoot it by replacing the capacitors and resistors connected to
> > LM317LZ, but nothing worked out as it still shows me the same error. Even
> > the power supply required by the processor is good and fixed at 3.5V.
> >
> > Is there any way of correcting this error? I can provide more details if
> > required.
> >
> > Few of the IC's used in design alongwith the processor are:
> > 1) EEPROM 24AA65SM
> > 2) Battery Management IC BQ2000T
> > 3) Dual logic flip flop SN74HC74D
> >
> > Any help would be of great help.
> >
> > Thank you!
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
[Non-text portions of this message have been removed]

------------------------------------

______________________________
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(You need to be a member of msp430 -- send a blank email to msp430-subscribe@yahoogroups.com )