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.

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Chris
 
Posts: n/a
Default Panasonic TV picture went to horiz. line

It's a Panasonic CT-36G24C. I've had it for 5 years. I came home
from work today & turned the set on. The pic was okay for a while,
but when I looked back, it was a horizontal line in the middle. I
could see movement. I turned the set off & turned the surge supressor
off for 5-10 min. When I turned it back on, the picture was full, but
shuddered for a minute, went to a thin line & then went full. It's
been fine for 3 hours now.
I read in the paper that the hydro company's been lowering the voltage
intermittently due to the high usage. I'm hoping this could be the
cause, but I'm not too optimistic.
Does anyone have an idea what could cause this & about how much I can
expect to pay to fix it?

Thanks,

Chris
  #2   Report Post  
Donald
 
Posts: n/a
Default

Hi, Chris, if you want to get inside it, if your vertical went bad, it could
be a $5 part that would be the vert IC.
It could be a bad fusable resistor not letting voltage get to the vert IC.
Or maybe a bad capacitor or two.
Cheaper to fix your self. Shop, if your lucky $70. Wish I was there I would
fix it. Donald

"Chris" wrote in message
...
It's a Panasonic CT-36G24C. I've had it for 5 years. I came home
from work today & turned the set on. The pic was okay for a while,
but when I looked back, it was a horizontal line in the middle. I
could see movement. I turned the set off & turned the surge supressor
off for 5-10 min. When I turned it back on, the picture was full, but
shuddered for a minute, went to a thin line & then went full. It's
been fine for 3 hours now.
I read in the paper that the hydro company's been lowering the voltage
intermittently due to the high usage. I'm hoping this could be the
cause, but I'm not too optimistic.
Does anyone have an idea what could cause this & about how much I can
expect to pay to fix it?

Thanks,

Chris



  #3   Report Post  
 
Posts: n/a
Default

If you have access to a Variac, you could try lowering the voltage to
see if that causes the problem. Did the lights di about the time of
the failure?

Or, plug the tv into a long extension cord with an electric iron also
plugged into the extension cord. That should lower the voltage
somewhat.

Or, the next time it fails, spray various components in the vicinity of
the vertical output circuit with cooling spray to see what that does.

H. R.(Bob) Hofmann

  #4   Report Post  
RonKZ650
 
Posts: n/a
Default

Sounds like the very common bad solder connections issue. Beat the top
of the set and see if the problem can be duplicated. If tapping the set
causes the picture to collapse, soldering the vertical output chip is
needed. The old LA7838 IC with bad solder trick.

  #5   Report Post  
Art
 
Posts: n/a
Default

Have the Vertical Deflection Circuitry repaired.
"Chris" wrote in message
...
It's a Panasonic CT-36G24C. I've had it for 5 years. I came home
from work today & turned the set on. The pic was okay for a while,
but when I looked back, it was a horizontal line in the middle. I
could see movement. I turned the set off & turned the surge supressor
off for 5-10 min. When I turned it back on, the picture was full, but
shuddered for a minute, went to a thin line & then went full. It's
been fine for 3 hours now.
I read in the paper that the hydro company's been lowering the voltage
intermittently due to the high usage. I'm hoping this could be the
cause, but I'm not too optimistic.
Does anyone have an idea what could cause this & about how much I can
expect to pay to fix it?

Thanks,

Chris





  #6   Report Post  
Chris
 
Posts: n/a
Default

On Tue, 16 Aug 2005 21:48:53 -0700, "Art"
wrote:

Have the Vertical Deflection Circuitry repaired.
"Chris" wrote in message
.. .
It's a Panasonic CT-36G24C. I've had it for 5 years. I came home
from work today & turned the set on. The pic was okay for a while,
but when I looked back, it was a horizontal line in the middle. I
could see movement. I turned the set off & turned the surge supressor
off for 5-10 min. When I turned it back on, the picture was full, but
shuddered for a minute, went to a thin line & then went full. It's
been fine for 3 hours now.
I read in the paper that the hydro company's been lowering the voltage
intermittently due to the high usage. I'm hoping this could be the
cause, but I'm not too optimistic.
Does anyone have an idea what could cause this & about how much I can
expect to pay to fix it?

Thanks,

Chris


Thanks for the comments. I didn't have any lights on so I don't know
if they dimmed. I'll try the iron & tapping tricks.
It looks like it won't be too much to have it looked at & repaired.
I'm no electronics technician, so if it does it again, I'll bring it
in to a shop.

Thanks,

Chris
  #7   Report Post  
Barney
 
Posts: n/a
Default


"Chris" wrote in message
news
On Tue, 16 Aug 2005 21:48:53 -0700, "Art"
wrote:

Have the Vertical Deflection Circuitry repaired.
"Chris" wrote in message
.. .
It's a Panasonic CT-36G24C. I've had it for 5 years. I came home
from work today & turned the set on. The pic was okay for a while,
but when I looked back, it was a horizontal line in the middle. I
could see movement. I turned the set off & turned the surge supressor
off for 5-10 min. When I turned it back on, the picture was full, but
shuddered for a minute, went to a thin line & then went full. It's
been fine for 3 hours now.
I read in the paper that the hydro company's been lowering the voltage
intermittently due to the high usage. I'm hoping this could be the
cause, but I'm not too optimistic.
Does anyone have an idea what could cause this & about how much I can
expect to pay to fix it?

Thanks,

Chris


Thanks for the comments. I didn't have any lights on so I don't know
if they dimmed. I'll try the iron & tapping tricks.
It looks like it won't be too much to have it looked at & repaired.
I'm no electronics technician, so if it does it again, I'll bring it
in to a shop.

Thanks,

Chris


It's nothing to with reduced mains voltage. You have a problem with the
vertical scan (field) circuit - could be any number of things, although a
dry solder joint is a strong possibility. A bit of judicious tapping around
the field ouput ic might help locate the problem.


Reply
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Horiz output problem on a new phillips 32m800 Jeff Rigby Electronics Repair 0 November 2nd 04 01:49 PM
Panasonic 27" Squashed Picture Jim Electronics Repair 2 October 15th 04 12:26 AM
McCulloch Strimmer Line Frank P UK diy 13 June 9th 04 07:40 AM
Telephone Line Problems barry martin Home Repair 1 March 7th 04 03:00 AM
phone line noise hank Home Ownership 8 December 7th 03 09:02 PM


All times are GMT +1. The time now is 08:51 AM.

Powered by vBulletin® Copyright ©2000 - 2023, Jelsoft Enterprises Ltd.
Copyright 2004-2023 DIYbanter.
The comments are property of their posters.
 

About Us

"It's about DIY & home improvement"