I have a phillips tube t.v that shows a wavy horizontal line
When the tv is first turned on it displays a wavy 3 to 4 inch horizontal line, but after its on for a little while it will show the full screen but still goes in and out at times, has anyone else had these type of problems?
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Re: I have a phillips tube t.v that shows a wavy...
If the set works fine intermittently it may be a loose connection or a bad solder joint. More likely the later. Heat will sometimes make a cold or broken solder joint work. If this changes when you lightly tap on the side of the TV you have a bad connection of sorts inside. These repairs can be expensive unless you find a good repair person.
The syncronizing signals in TV's (keeping the picture locked in) are around the high voltage transformer which is usually the heaviest component attached to the circuit boards. It's stressful over time and I've seen the solder connections crack and become intermittent.
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It sounds that the main power supply section to your TV has the fault. The horizontal thik lines that appears crawling down across the screen should be of video 'HUM'. Have you replaced the main filter capacitor at the power supply section? If not, replace it along with the main rectifier. The AC power is rectifed by a bridge and applied ot this main filter capcitor. It will have a capacitance value between 120 to 350MFD 450VDC. Check this section. Measure the rectifed DC voltage acorss this main filter capacitor. It should be around 350VDC, if your home power supply line is 220VAC. If it is 110AC, this DC voltage will be around 165VDC; and it should be. If rectified DC voltage found lower than the input AC voltage, replace the rectifier bridge. In some sets, this bridge section have four diodes. Some other circuits, a bridge rectifier stalk may be used.
You most likely have a bad picture tube. Green gun is shorted. Usually a set this size is not economically feasible to put a new tube in. You may also have a green drive problem on the CRT board. Have a shop check it out for you before junking it. Thanks for using fixya.
I'm having the same issue with this TV! From the top of the screen to
about two/three inches below there are thousands of horizontal lines with a
whitish tinge which seem to be reflecting what is just below these lines! I’ve
never seen this issue on any TV ever! From what I am seeing now is that many
people are having this issue and more! We should put a class action lawsuit
against them! If anyone knows anything, please post the info. Many tech forums
are loaded with issues for these TV’s but this issue seems to be prominent!
My mom had two Phillips TV’s; one just under two years, and the other
just under a year and Phillips refused to fix either without a large expenditure
on her behalf. She told me never to buy Phillips and I should have listened. Phillips
used to be a great company so I don’t really know what has happened? This was a
TV for my Grandmother and it wasn't at a bad price not to mention the picture
was great albeit severely over scanned.
As for her TV, we had it about two weeks over a year and Phillips said there
was nothing they could do! They said they would pay for the cost to replace the
tube if I took it to one of their dealers but they said the cost to bring it there
and repair would fall on me! Also if the issue was not related to the tube I
would have to pay everything OOP! The lady laughed on the phone and said even
if it had been under six months or under a year they would still only pay to
fix the parts and everything else would cost me! WTF?
The moral of the story is NEVER BUY PHILLPS/MAGNOVOX EVER! You might be
getting the TV deal of the century but it is not worth it in the long run. I originally
thought my mom was nuts, but now looking back considering the issues others are
having, and realizing the **** poor way Phillips support deals with ALL
problems, they’re simply not worth the money or trouble. I WILL NEVER buy another
Phillips, Magnavox, or Funai product ever again, whether it is a TV, clock, DVD
player, and/or ANY electronic device! If you do you HAVE BEEN WARNED and WILL
If the horizontal lines going through the picture are fine white lines, then I would suspect the picture tube as having a heater to cathode short or some other problem. Since some sets have had a 3 year warranty on the picture tube, you may be lucky unless the labor to replace the tube is more than the set is worth. Sanyo is usually not a good name in consumer electronics anymore, so if you're looking for a replacement I would look elsewhere.
Use an ESR meter for in-circuit capacitor check....notorious
are the 47mf / 25v and 50v electrolytics in power circuits.....
regulator, horizontal et al ......start-up problems = turning on
after several tries......charge the cap enough to run.........T.