It's probably a simple repair, especially for someone that has fixed that
same tv a dozen times. The tech would look at the symptom and say, oh it's
that 100uf 250v capacitor again or the vertical drive transistor. That will
be $110.00 for the repair. The repair is usually simple, knowing the part to
replace is the hard part. Get the model number and put your question on some
of the electronic repair groups. Maybe you'll get lucky.
Post your question with the exact model number to "sci.electronic.repair"
[I've changed a single capacitor with the advice given there and restored TV
sets. The key being knowing exactly the probably component.]
Since you aren't electronically inclined, you possibly won't want to pursue
this unless it is a well-known or easily diagnosed fault.
I use over-the-air TV. So does my mother. I got the converter box so
that my analog TV (4 years old) won't turn into a pumpkin on 2/18/09.
Cable is not worth it to me. I think satellite is a better value but
still not worth it to me - I hardly watch TV except for news, a couple
game shows and Dancing With the Stars.
My apartment complex prohibits satellite dishes. I wonder if that is
- Don Klipstein ( firstname.lastname@example.org)
On Tue, 10 Jun 2008 05:36:12 +0000 (UTC), email@example.com (Don
I guess news is one of the best reason to have cable. The local news
is just fluff around here.
I seldom watch anything on the networks. D list celebrities dancing
and morons eating bugs is not entertaining to me.
process with a 3 year old
36" RCA, I thought I would chime in
here. My TV just shut
off one day, by itself. A friend told
me about a place that did
free estimates and he thought they were
pretty good. So, we
loaded up the boat anchor in the car,
did the 10 mile trip and
dropped it off. Later that day I got a
call from the repair guy ....
$129. I said of course, do it. If you
can find a good repair
guy with free estimates, it's worth a
try. I didn't want to replace
the TV yet because of an impending move
and I figure the flat
screens will still come down a bit more.
It also fit real nice in
the present entertainment cabinet. BTW,
I got the TV
back in 3 days and am very happy with
it. After the move,
in maybe 8 months or so, it will
probably be replaced or moved
down to a bedroom TV or such. But
for now I don't have to fool with it.
If you live in the Chicago
suburban area (Countryside, IL), the
guys at Fox Electronics
are real good and fair.
Also search for some other clever search strings like "tv repair symptoms"
What you have is a problem with the vertical deflection. You already knew
that. It can be a problem anywhere starting to where the signal is
generated (on some chip), amplified, and wired to the yoke around the neck
of the CRT. Usually the problem is the driver transister (vertical output).
Or a bad solder joint. Or wiring. Or the yoke. In my experience, at least
half of all faulty electronics are due to something physical: a bad solder
joint, short in a multilayer circuit board, connector, cable, switch, etc.
yourself either unless you already have the requried electronics skills and
can handle troubleshooting complex electronics. If it is going to take you
two hundred hours to diagnose and repair, then you might consider your time
better spent elsewhere.
A TV repairman, if you can actually find one, probably won't bother looking
at it. Nowadays, anything under $400 to replace simply isn't worth being
repaired. Consider that you're going to have to buy a digital tv adapter in
february. Add that to the cost of the repair ($150-250) and you're well on
your way to replacing it.
circuit board first. You'll probably need an osciloscope to trace the signal.
Most tv repairman nowadays only diagnose down to the board level. They have
a stock of replacement boards so they can try swapping them out fairly risk
free. If you try that, you'll be lucky if you fix it for less than twice
the cost of a new TV.
Unless you live in your TV, this really isn't a home repair question. Try
sci.electronics.repair. But, please, read the the FAQ and get a clue first.
They're not going to teach you how to solder or procure basic
troubleshooting skills that are already detailed in the FAQ. They will,
however, be able to tell you if the particular tv model has a history of
This should be a cheap fix if you do it yourself. Look at the
vertical sweep circuitry. The problem could be a bad solder joint or
electrolytic capacitor around the vertical oscillator chip, a high
voltage electrolytic capacitor (probably at least 180 volts) in series
with the vertical yoke (those coils of wires around the rear area of
the CRT) , or the vertical output transistors. There are two of those
transistors, and when one goes bad, so does the other one. In a lot
of TVs the transistors are built into a chip, and that chip may also
contain the rest of the vertical circuitry.
You may be able to find a schematic on the web, especially from
Russian websites (a friend of mine bought a schematic from one for $5,
maybe from http://top.eserviceinfo.com or Radio Locman), or your
library may have Sams (not Sam's) Photofacts, either on paper or
online. It's even possible that Sears.com has the repair manual
online (they do for major appliances).
If you don't know how to solder and desolder, practice on a junk
circuit board. The TV is probably made with one-sided circuit boards,
which are by far the easiest to solder and desolder. Desoldering can
be done with a suction bulb from Radio Shack, but copper desoldering
braid is probably safer because it lessens the chance of overheating
the copper traces and making them come unglued. A 30W iron is good
for soldering single-sided boards, but 40W is better, especially for
If you work on the TV, unplug it first! And don't set it upright on a
soft surface, like a sofa or mattress, because it can easily tip
foward (center of gravity is just 2" behind the front of the screen).
So either place a pillow to catch it, or work on it face-down. Be
careful not to bump or scratch the glass CRT.
Parts prices can vary a lot. Some good sources are MCM Electronics,
MAT Electronics, Dalbani, Premium Parts, and Tritronics, but don't
overlook Sears or even the manufacturer. Generic parts, like
capacitors, can be bought from any electronics supply, but be sure
they're rated for roughly the same capacitance (it may have to be
fairly close for vertical timing capacitors -- I once replaced a 1uF
with a 10uF, and the picture was only 2" tall) and at least as much
voltage as the original. BTW capacitors can't be tested reliably with
just a meter, even a capacitance meter, and bad caps can look
perfectly good. If you're replacing electrolytic caps around the
vertical chip, consider replacing all of them. And don't install any
of them backward!
Even though analog TV is scheduled to go away in Feb. 2009, converter
boxes are only $10-20 if you get a free $40 discount card (limit is
two per person) from DTV2009.gov. I'm using one with a vintage 1976
TV that used to belong to my parents and still works fine (was made in
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.