Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

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Default Toshiba TP50F60 Failure

My Toshiba projection recently failed. Front LED light would blink on and off continously. TV would not power off. I had to pull the cord from the socket.

However, after TV sits unplugged for a few hours, the TV would turn back on after it is plugged in. TV would operate normally for 20-minutes or so before turning off again. Same problem as before - LED would blink continously. Picture is perfect. No distortion when it is on. Therefore, I do not believe the 'digital convergance' is the cause.

Anyone else having these problems. Please advise. Thank you.
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Art
 
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Default Toshiba TP50F60 Failure

Other than just cycling the thing on and off what actual diagnostics have
you made, S.A. Voltage measurements while working and not working, Etc??
Many things may trip the protective shutdown inclusive of the registration,
beam current, etc.
"rocco428" wrote in message
...

My Toshiba projection recently failed. Front LED light would blink on
and off continously. TV would not power off. I had to pull the cord
from the socket.

However, after TV sits unplugged for a few hours, the TV would turn
back on after it is plugged in. TV would operate normally for
20-minutes or so before turning off again. Same problem as before -
LED would blink continously. Picture is perfect. No distortion when
it is on. Therefore, I do not believe the 'digital convergance' is the
cause.

Anyone else having these problems. Please advise. Thank you.


--
rocco428



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Posted to sci.electronics.repair
 
Posts: n/a
Default Toshiba TP50F60 Failure

Agreed, there are lots of things that will put the set into protect
shutdown.

That being said, the symptom is typical of a somewhat common failure on
the stand up board that has a high value, 82K I think, 1/8 watt
resistor that is on the 200LVP, 200V low protect, that commonly will
increase in value and cause intermittent shutdown. It has been a very
long time since anyone has wanted to spend the money on fixing one of
those old beasts, good set though as long as the tubes were not
overdriven.

Any good technician will be able to repair this issue with the above
information and possibly a schematic if needed. Most of Toshiba's sets
from that era had the connector pins labeled.

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Posts: 3
Default

Does anyone have a schematics of the TOSHIBA TP50F60. I need to know which board to remove and exactly which resistor needs replacing. Thanks for the heads up.

Also, if I want to measure voltage what section of the board should I start? and if I want to over-ride the auto shutdown feature, which chip(s) should I remove?



Quote:
Originally Posted by
Agreed, there are lots of things that will put the set into protect
shutdown.

That being said, the symptom is typical of a somewhat common failure on
the stand up board that has a high value, 82K I think, 1/8 watt
resistor that is on the 200LVP, 200V low protect, that commonly will
increase in value and cause intermittent shutdown. It has been a very
long time since anyone has wanted to spend the money on fixing one of
those old beasts, good set though as long as the tubes were not
overdriven.

Any good technician will be able to repair this issue with the above
information and possibly a schematic if needed. Most of Toshiba's sets
from that era had the connector pins labeled.
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Jumpster Jiver
 
Posts: n/a
Default Toshiba TP50F60 Failure

rocco428 wrote:
Does anyone have a schematics of the TOSHIBA TP50F60. I need to know
which board to remove and exactly which resistor needs replacing.
Thanks for the heads up.

Also, if I want to measure voltage what section of the board should I
start? and if I want to over-ride the auto shutdown feature, which
chip(s) should I remove?


No offence intended but...

Questions like that indicate you should not work on this TV

The problem may be that particular resistor or something else. You will
probably need some troubleshooting skills.

Also, you don't over-ride auto shutdown features except in a rare
momentary time of measuring where the problem is.
If you over-ride the protection circuits, the TV will self destruct.
It may simply go out with a puff of smoke or it may burn your house down
while you're sleeping.
Please be careful.







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kip
 
Posts: n/a
Default Toshiba TP50F60 Failure

Yea !!! Burn Down The House....

F****** Bull****.

"Jumpster Jiver" wrote in message
news:rj3Ff.54956$7l4.18567@trnddc05...
rocco428 wrote:
Does anyone have a schematics of the TOSHIBA TP50F60. I need to know
which board to remove and exactly which resistor needs replacing. Thanks
for the heads up.

Also, if I want to measure voltage what section of the board should I
start? and if I want to over-ride the auto shutdown feature, which
chip(s) should I remove?


No offence intended but...

Questions like that indicate you should not work on this TV

The problem may be that particular resistor or something else. You will
probably need some troubleshooting skills.

Also, you don't over-ride auto shutdown features except in a rare
momentary time of measuring where the problem is.
If you over-ride the protection circuits, the TV will self destruct.
It may simply go out with a puff of smoke or it may burn your house down
while you're sleeping.
Please be careful.







  #8   Report Post  
Posted to sci.electronics.repair
kip
 
Posts: n/a
Default Toshiba TP50F60 Failure

kip did not write that...

"rocco428" wrote in message
...

Hey, what up with the attitude mother****er.

You lucky I don't know who you are. Otherwise, I go there and ****in
kill you and then I'll eat your kids. No. Maybe I'll eat your kids in
front of you and then gut you like a little **** that you are. Mother
****er!

Ya 'all are no help at all. What's the point of this forum anyway.
What a waste of time. You all suck. Rott in HELL. And ****en
goodnight!

Peace. Ya 'heard.


kip Wrote:
Yea !!! Burn Down The House....

F****** Bull****.

"Jumpster Jiver" y wrote in message
news:rj3Ff.54956$7l4.18567@trnddc05...
rocco428 wrote:
Does anyone have a schematics of the TOSHIBA TP50F60. I need to know
which board to remove and exactly which resistor needs replacing.
Thanks
for the heads up.

Also, if I want to measure voltage what section of the board should I
start? and if I want to over-ride the auto shutdown feature, which
chip(s) should I remove?


No offence intended but...

Questions like that indicate you should not work on this TV

The problem may be that particular resistor or something else. You
will
probably need some troubleshooting skills.

Also, you don't over-ride auto shutdown features except in a rare
momentary time of measuring where the problem is.
If you over-ride the protection circuits, the TV will self destruct.
It may simply go out with a puff of smoke or it may burn your house
down
while you're sleeping.
Please be careful.







--
rocco428



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Leonard Caillouet
 
Posts: n/a
Default Toshiba TP50F60 Failure

Glad you cleared that up, Kip. I thought maybe we were going to have to
refer you to Mark for some counselling. :-)

Leonard

"kip" wrote in message
.. .
kip did not write that...



  #10   Report Post  
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kip
 
Posts: n/a
Default Toshiba TP50F60 Failure

Cut and Paste can be brutal...Sometimes !
kip
"Leonard Caillouet" wrote in message
news:esHGf.45221$bF.34804@dukeread07...
Glad you cleared that up, Kip. I thought maybe we were going to have to
refer you to Mark for some counselling. :-)

Leonard

"kip" wrote in message
.. .
kip did not write that...





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