Vertical Lines
DB
screen. I believe I need to replace the cap near the vertical hold IC.
Where is the vertical hold IC? Thanks.
DB
"DB" <x...@x.com> wrote in message
news:deadnRItKurh1rzR...@earthlink.com...
> Have a Toshiba 30HF85 30" TV. There are vertical lines at the top of the
> screen. I believe I need to replace the cap near the vertical hold IC.
> Where is the vertical hold IC? Thanks.
>
DB
> screen. I believe I need to replace the cap near the vertical hold IC.
> Where is the vertical hold IC? Thanks.
>
Mistake!! I have horizontal lines near top of screen!! Sorry.
stra...@yahoo.com
If you can't find the vertical section, it's reasonable to assume you
can't find the dangerous EHT section either. I strongly recommend you
find someone to repair it for you.
G²
Meat Plow
Take it to a repair shop before you hurt yourself or worse.
DB
Listen guys. I have a 2 year degree in elect/electronics. I know all about
the high voltage. I've been inside many a crt's without getting fried. I
once fixed a crt monitor by replacing a dead cap. I appreciate the concern.
New development: I realized it's as if the picture size has been increased
vertically to where the image has returned at the top but upside down. Is
there an adjustment or do I need to replace a component? Thanks.
Meat Plow
> "DB" <x...@x.com> wrote in message
> news:vLmdnX7vEcXgzbzR...@earthlink.com...
>>
>> "DB" <x...@x.com> wrote in message
>> news:deadnRItKurh1rzR...@earthlink.com...
>>> Have a Toshiba 30HF85 30" TV. There are vertical lines at the top of
>>> the screen. I believe I need to replace the cap near the vertical
>>> hold IC. Where is the vertical hold IC? Thanks.
>>>
>>>
>> Mistake!! I have horizontal lines near top of screen!! Sorry.
>>
>>
> Listen guys. I have a 2 year degree in elect/electronics.
I have a 35 year degree in experience on the job. The structure of your
questions are a dead giveaway (no pun intended) that you should not be
inside the back of a set relying on your associates degree to protect you.
That is unless you wrap it around your hand as an insulator.
DB
I believe it's called vertical fold over. I most likely need to replace a
bad cap near the vertical hold IC.
Which takes me back to my original question: Where is the vertical hold IC?
DB
"Meat Plow" <mhy...@yahoo.com> wrote in message
news:pan.2010.06...@gmail.com...
> On Wed, 23 Jun 2010 10:18:24 -0400, DB ??o??:
I've already been in there. You're not responsible. Which IC is it?
Thanks.
stra...@yahoo.com
> "Meat Plow" <mhyw...@yahoo.com> wrote in message
Then buy the service manual.
G²
Stefan Heimers
> Which takes me back to my original question: Where is the vertical hold
> IC?
> What's the shape and how many pins? Thanks.
There are two coils on the back of the CRT. The horizontal is connected to
the horizontal output transformer (which is also the high voltage
transformer, I'm sure you recognize it).
Now just track the connection to the other coil. This comes from the
vertical output stage, which is driven by the vertical sync circuit.
If your picture is stable besides of the wrong size, its probably not the
vertical IC at fault, but the power amplifier after it, or the power
supply.
If there are only a few lines, and they are crossing the picture diagonally,
then it's the beam which is not blanked during the vertical flyback. This
can be caused by a worn out picture tube, or by the grid bias voltages. I
don't know about your TV, but usually there are some potentiometers for
adjusting the grid voltages and slightly changing it makes the lines
diasppear. That's what it lools like:
http://bs.cyty.com/menschen/e-etzold/archiv/TV/uvb/img/MC47_ohneUVB.jpg
Is yours similar to that?
Stefan
DB
"Stefan Heimers" <stefan...@heimers.ch> wrote in message
news:hvt8ke$rqb$1...@news.albasani.net...
Thanks. Finally some useful info. The symptoms look more like when the
picture is adjusted to large and it folds back, to where you can see and
image in the lines, but upside down. Only about 1" at the top.
Meat Plow
If you have a pdf document source for the schematic I'll have a look and
let you know.
Michael A. Terrell
How do you know it's a bad IC?
--
Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.
Michael A. Terrell
Vertical hold? That went away, decades ago.
DB
"Michael A. Terrell" <mike.t...@earthlink.net> wrote in message
news:BOudneYKtKqO17_R...@earthlink.com...
That's ok, Michael. Stefan knows what I'm talking about, and he's knows
what he's talking about too.
Meat Plow
It's near the big thing with blue and yellow wires. That is on the side
of a thing that looks like a little green round thing but should be black
but if not maybe green also. Trace that thing over by the other thing and
you might see a thing that matches it. If so look to the left of that
thing and underneath another thing. Let me know how it works out for you.
DB
Are you serious?
Jeffrey D Angus
>>> That's ok, Michael. Stefan knows what I'm talking about, and he's knows
>>> what he's talking about too.
>> It's near the big thing with blue and yellow wires. That is on the side
>> of a thing that looks like a little green round thing but should be black
>> but if not maybe green also. Trace that thing over by the other thing and
>> you might see a thing that matches it. If so look to the left of that
>> thing and underneath another thing. Let me know how it works out for you.
>
> Are you serious?
>
>
Brutally honest is the word that came to my mind. ;-)
Jeff
--
“Egotism is the anesthetic that dulls the pain of stupidity.”
Frank Leahy, Head coach, Notre Dame 1941-1954
Meat Plow
Hell yes!
Franc Zabkar
keyboard and composed:
>The symptoms look more like when the
>picture is adjusted to large and it folds back, to where you can see and
>image in the lines, but upside down. Only about 1" at the top.
The vertical amp IC is usually a SIP attached to a heatsink, around 9
pins or so.
Replace the electrolytic capacitors in the neighbourhood of this IC.
Typical part number prefixes are TA (Toshiba), AN (Matsushita,
Panasonic), LA (Sanyo).
You can probably find a datasheet, with application circuit, here:
http://www.datasheetarchive.com/
- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
Michael A. Terrell
DB wrote:
>
> That's ok, Michael. Stefan knows what I'm talking about, and he's knows
> what he's talking about too.
Sure he does. You sure don't.
DB
>
> DB wrote:
>>
>> That's ok, Michael. Stefan knows what I'm talking about, and he's knows
>> what he's talking about too.
>
>
> Sure he does. You sure don't.
>
That's why I'm posting here, to get helpful information. Why are you
posting here? To shoot more negative bile out of your big mouth. Just
another jerk who's a really big man (on line).
Michael A. Terrell
Whatever you want to think. In two months, I will have worked 45
years in electronics manufacturing and repair. You will still be
bitter, and asking vague questions.
DB
>
> DB wrote:
>>
>> "Michael A. Terrell" <mike.t...@earthlink.net> wrote in message
>> news:K6mdnXfhFpZeH77R...@earthlink.com...
>> >
>> > DB wrote:
>> >>
>> >> That's ok, Michael. Stefan knows what I'm talking about, and he's
>> >> knows
>> >> what he's talking about too.
>> >
>> >
>> > Sure he does. You sure don't.
>> >
>>
>> That's why I'm posting here, to get helpful information. Why are you
>> posting here? To shoot more negative bile out of your big mouth. Just
>> another jerk who's a really big man (on line).
>
>
> Whatever you want to think. In two months, I will have worked 45
> years in electronics manufacturing and repair. You will still be
> bitter, and asking vague questions.
>
>
lessons yet, or who didn't know the value of being generally decent. Good
luck.
Some people die at 25 and aren't buried until 75. - Benjamin Franklin
Meat Plow
<sounds of WW2 B52 shot down in flames plummeting to earth>
Well I guess this seals your fate as far as getting much in the way of
anything but ridicule from the regs here. Better try a repair group where
you haven't insulted everyone's intelligence.
DB
everyone?
Sjouke Burry
Meat Plow
I think that's a fair estimate. Although you still might someone who
feels sorry for you or hasn't read your oblique and ambiguous posts.