Had one of these come in for repair-- looked like it was already in
another shop. The common problem: loss of function control, remote
and on-set buttons. Stuck forever on one source, ect. I see the
failure is commonly remedied by replacing the mainboard, but why are
so many of these sets failing? Is it chip related, as in processor or
memory, firmware corruption, SMPS related? I know the qualtiy of iLO/
Funai isn't stellar, but this failure is a bit too common for too many
customers. I'm just wondering if anyone has a clue, closer to
component level, of what fails in these sets.


-Dan

A common fault is the main processor, or in the I/O circuits that work
with the main communications buss. That is why the board is replaced.
It would not be feasible to service at the component level.

Jerry G.

_________________


On Mar 2, 9:16*pm, uptimod wrote:
Had one of these come in for repair-- looked like it was already in
another shop. *The common problem: loss of function control, remote
and on-set buttons. *Stuck forever on one source, ect. *I see the
failure is commonly remedied by replacing the mainboard, but why are
so many of these sets failing? *Is it chip related, as in processor or
memory, firmware corruption, SMPS related? *I know the qualtiy of iLO/
Funai isn't stellar, but this failure is a bit too common for too many
customers. *I'm just wondering if anyone has a clue, closer to
component level, of what fails in these sets.

-Dan

Read mo http://www.justanswer.com/questions/...#ixzz0h8YFHjTA


I found this explanation from someone who appears to think they know
why it fails:

"it is the brain/micro/audio/video processor board it is what makes
things work in the set. I have replace the board 100x for this exact
problem and every time it has fixed the issue.
I doubt many people have explained why you have had the problem but it
was no fault of yours or even of the LCD itself, it was a design flaw
of the remote which was not a fine tuned frequency and confuses the
microprocessor and makes it think it has been told to do something it
shouldn't have protects itself. The remote was built with the
frequencies not set properly at the factory and when it got bad data
from the remote the micro blows on the sets main board. I have spent
weeks trying to bypass the data line no go they connected both the
buttons on the set (less the power button) and the remote buttons on
the same data line. There is only one fix brain surgery replace the
brain with a new brain and replace the remote so it does not dameg
your new brain. The new board comes with new software and new coding
on the remote,"

http://www.justanswer.com/questions/...-a-blue-screen

On Mar 2, 9:14*pm, "Jerry G." wrote:
A common fault is the main processor, or in the I/O circuits that work
with the main communications buss. *That is why the board is replaced.
It would not be feasible to service at the component level.

Jerry G.

_________________

On Mar 2, 9:16*pm, uptimod wrote:



Had one of these come in for repair-- looked like it was already in
another shop. *The common problem: loss of function control, remote
and on-set buttons. *Stuck forever on one source, ect. *I see the
failure is commonly remedied by replacing the mainboard, but why are
so many of these sets failing? *Is it chip related, as in processor or
memory, firmware corruption, SMPS related? *I know the qualtiy of iLO/
Funai isn't stellar, but this failure is a bit too common for too many
customers. *I'm just wondering if anyone has a clue, closer to
component level, of what fails in these sets.

-Dan- Hide quoted text -

- Show quoted text -

On Wed, 3 Mar 2010 09:49:52 -0800 (PST), uptimod
wrote:




Read mo http://www.justanswer.com/questions/...#ixzz0h8YFHjTA


I found this explanation from someone who appears to think they know
why it fails:

"it is the brain/micro/audio/video processor board it is what makes
things work in the set. I have replace the board 100x for this exact
problem and every time it has fixed the issue.
I doubt many people have explained why you have had the problem but it
was no fault of yours or even of the LCD itself, it was a design flaw
of the remote which was not a fine tuned frequency and confuses the
microprocessor and makes it think it has been told to do something it
shouldn't have protects itself. The remote was built with the
frequencies not set properly at the factory and when it got bad data
from the remote the micro blows on the sets main board. I have spent
weeks trying to bypass the data line no go they connected both the
buttons on the set (less the power button) and the remote buttons on
the same data line. There is only one fix brain surgery replace the
brain with a new brain and replace the remote so it does not dameg
your new brain. The new board comes with new software and new coding
on the remote,"

http://www.justanswer.com/questions/...-a-blue-screen

On Mar 2, 9:14*pm, "Jerry G." wrote:
A common fault is the main processor, or in the I/O circuits that work
with the main communications buss. *That is why the board is replaced.
It would not be feasible to service at the component level.

Jerry G.

_________________

On Mar 2, 9:16*pm, uptimod wrote:



Had one of these come in for repair-- looked like it was already in
another shop. *The common problem: loss of function control, remote
and on-set buttons. *Stuck forever on one source, ect. *I see the
failure is commonly remedied by replacing the mainboard, but why are
so many of these sets failing? *Is it chip related, as in processor or
memory, firmware corruption, SMPS related? *I know the qualtiy of iLO/
Funai isn't stellar, but this failure is a bit too common for too many
customers. *I'm just wondering if anyone has a clue, closer to
component level, of what fails in these sets.

-Dan- Hide quoted text -

- Show quoted text -
While that explanation is appealing, it fails the logic test.
Consider how a remote works: You press a key, it sends a set of
pulses to the TV. These pulses get passed on to a processer which
translates them into the equivalent of button presses. There are no
'self destruct' commands possible.

The real reson is far more mundane. Take a look at the main board of
a TV. I recently worked on the 'Small Signal Board' (AKA Main Board)
for a plasma TV. This 8" x 12" board had three distinct processors on
it, as well as several periperal chips which were as complex as many
programmable processors. One of those processers, the 'standby'
processor is responsible for interpreting the signal from the remote,
and if the 'Power' button is pressed, turning on the main power supply
and monitoring the start up processes of the rest of the TV. This
requires a section of the board equivalent to an early PC to be
functioning perfectly. Above all, if the flash memory is corrupted,
if the standby power supply is not operating up to specs (The 5.2V
standby supply is actually used to provide the 3.3, 2.5, and 1.25
volts required by the standby processor), nothing happens.

As far as repairing the board, first you have to be able to diagnose
the problem. This board DID have JTAG connections, and presumably
with appropriate software it would be possible to diagnose the
problem. However, look at it from the service shop point of view.
Are you going to tie up thousands of dollars in a JTAG system so an
unusually skilled tech can identify the problem? Then tie up thousands
more into a rework system so a skilled reworker can replace a 120 pin
IC?

PlainBill

On Wed, 3 Mar 2010 09:49:52 -0800 (PST), uptimod
wrote:




Read mo http://www.justanswer.com/questions/...#ixzz0h8YFHjTA


I found this explanation from someone who appears to think they know
why it fails:

"it is the brain/micro/audio/video processor board it is what makes
things work in the set. I have replace the board 100x for this exact
problem and every time it has fixed the issue.
I doubt many people have explained why you have had the problem but it
was no fault of yours or even of the LCD itself, it was a design flaw
of the remote which was not a fine tuned frequency and confuses the
microprocessor and makes it think it has been told to do something it
shouldn't have protects itself. The remote was built with the
frequencies not set properly at the factory and when it got bad data
from the remote the micro blows on the sets main board. I have spent
weeks trying to bypass the data line no go they connected both the
buttons on the set (less the power button) and the remote buttons on
the same data line. There is only one fix brain surgery replace the
brain with a new brain and replace the remote so it does not dameg
your new brain. The new board comes with new software and new coding
on the remote,"

http://www.justanswer.com/questions/...-a-blue-screen

On Mar 2, 9:14*pm, "Jerry G." wrote:
A common fault is the main processor, or in the I/O circuits that work
with the main communications buss. *That is why the board is replaced.
It would not be feasible to service at the component level.

Jerry G.

_________________

On Mar 2, 9:16*pm, uptimod wrote:



Had one of these come in for repair-- looked like it was already in
another shop. *The common problem: loss of function control, remote
and on-set buttons. *Stuck forever on one source, ect. *I see the
failure is commonly remedied by replacing the mainboard, but why are
so many of these sets failing? *Is it chip related, as in processor or
memory, firmware corruption, SMPS related? *I know the qualtiy of iLO/
Funai isn't stellar, but this failure is a bit too common for too many
customers. *I'm just wondering if anyone has a clue, closer to
component level, of what fails in these sets.

-Dan- Hide quoted text -

- Show quoted text -
Darn!! Posted it too soon.

As far as the reason for the component's failure, a lot of blame has
been placed on the emphasis on reducing the use of lead. At the macro
level, lead-free solder just doesn't work as well as the old 63/37
eutectic we all relied on. The situation is even worse when you get
inside the IC. The tin/lead mixture that was used for bonding in the
past has ben replaced with pure tin. Unfortunately, pure tin has the
tendency to produce whiskers over time. And with the extremely fine
wires being used, and the very narrow spaces between pads, those
whiskers tend to short to adjacent pads.

While I am all in favor of making the home safe for children, I can't
help but think very few toddlers have ingested a measurable amount of
lead by chewing open an IC and eating the internal connections.

PlainBill

On Mar 3, 5:33*pm, wrote:
On Wed, 3 Mar 2010 09:49:52 -0800 (PST), uptimod



wrote:

Read mohttp://www.justanswer.com/questions/...urns-on-and-sh...

I found this explanation from someone who appears to think they know
why it fails:

"it is the brain/micro/audio/video processor board it is what makes
things work in the set. I have replace the board 100x for this exact
problem and every time it has fixed the issue.
I doubt many people have explained why you have had the problem but it
was no fault of yours or even of the LCD itself, it was a design flaw
of the remote which was not a fine tuned frequency and confuses the
microprocessor and makes it think it has been told to do something it
shouldn't have protects itself. *The remote was built with the
frequencies not set properly at the factory and when it got bad data
from the remote the micro blows on the sets main board. I have spent
weeks trying to bypass the data line no go they connected both the
buttons on the set (less the power button) and the remote buttons on
the same data line. There is only one fix brain surgery replace the
brain with a new brain and replace the remote so it does not dameg
your new brain. The new board comes with new software and new coding
on the remote,"

http://www.justanswer.com/questions/...urns-on-and-sh...

On Mar 2, 9:14 pm, "Jerry G." wrote:
A common fault is the main processor, or in the I/O circuits that work
with the main communications buss. That is why the board is replaced.
It would not be feasible to service at the component level.

Jerry G.

_________________

On Mar 2, 9:16 pm, uptimod wrote:

Had one of these come in for repair-- looked like it was already in
another shop. The common problem: loss of function control, remote
and on-set buttons. Stuck forever on one source, ect. I see the
failure is commonly remedied by replacing the mainboard, but why are
so many of these sets failing? Is it chip related, as in processor or
memory, firmware corruption, SMPS related? I know the qualtiy of iLO/
Funai isn't stellar, but this failure is a bit too common for too many
customers. I'm just wondering if anyone has a clue, closer to
component level, of what fails in these sets.

-Dan- Hide quoted text -

- Show quoted text -

Darn!! *Posted it too soon.

As far as the reason for the component's failure, a lot of blame has
been placed on the emphasis on reducing the use of lead. *At the macro
level, lead-free solder just doesn't work as well as the old 63/37
eutectic we all relied on. *The situation is even worse when you get
inside the IC. *The tin/lead mixture that was used for bonding in the
past has ben replaced with pure tin. *Unfortunately, pure tin has the
tendency to produce whiskers over time. *And with the extremely fine
wires being used, and the very narrow spaces between pads, those
whiskers tend to short to adjacent pads.

While I am all in favor of making the home safe for children, I can't
help but think very few toddlers have ingested a measurable amount of
lead by chewing open an IC and eating the internal connections.

PlainBill

I don't think doing away with the lead in modern electronics was based
on toddlers eating ICs. I think it had more to do with the massive
amounts of throw away electronics that make it into land fills and the
like. And probably an equal amount of liberal bull****. I imagine
that soon you will have to call lead abatement to do a full house
cleanup if vintage equipment is found on the premises.