Question about Panasonic PV-C2010 20 in. TV/VCR Combo

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Tubes are all the tv cathode ray tubes the same and can they be replaced by others as long as they are the same size

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NO! it would have to be by the same manufacture also the specifications and ratings would have to be the same , as some differ from different models
sometimes different sizes can but it will just look funny and will just end up hurting the board


Posted on Oct 30, 2008

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Panasonic TV DVD/VCR combo turns on but right back off can hear the clicking on the inside .. screen does not even come on..

If you hear a clicking that is the relay which is a sign that the tv has partial power. The rest of the power supply is dead though. Usually it is the voltage rectifier and a wire wound resister maybe some burnt circuit traces. Many tvs lose their fly-back transformer and or the horizontal or vertical output transistor and a handful of electrolytic capacitors. Few people repair tvs these days and even fewer want to keep old cathode ray tube (CRT) types tvs anyways. How much for a new flat screen tv of similar size? Likely far cheaper than parts and labour for the other one.

Oct 16, 2013 | Panasonic Televison & Video

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Is there such a thing as buying infrared Sensors for a TV having problems trying to buy one

Most likely the problem is with the remote. The infrared LED transmitter in the remote could be weak. If the remote only works when it is close to the TV then it is faulty.
Try replacing the batteries first, the maybe flat.
When you replace them and you still have trouble operating the TV and it only works at close range then you can purchase an infrared LED transmitter form an electronics parts store and replace the this LED in the remote.
NOTE the LED is a polarised device and only work if inserted correctly.
The LED will have a small flat surface on the rim of the LED next to the shorter leg wire is the K (cathode) - lead, the longer leg wire is the A (anode) + lead. Make sure it is fitted to the circuit board the right way around before you solder the LED to the circuit board.

Apr 03, 2012 | Televison & Video

1 Answer

TV will not come on. Cord and fuse OK. There is AC voltage on anode and cathode of silicon rectifiers but no DC voltages.

Hi lou,
Welcome to FixYa.
My name is John. I will be assisting you with your issue.
Do you have voltage on flyback to tube?

Dec 29, 2010 | Quasar VV-1302 13 in. TV/VCR Combo

1 Answer

My probleb is I have purchased be fore 13 years & noe the clour is changed and becomonig red what shall i do/ Brand Sony Model -B21L1 The problem is changed its colour in to Red I didinot...

check the base board plugged into the picture tubes neck. there may be some dry soldering. also check the video output transistor for red cathode in the same board. found faulty replace it. also check the voltage at the collector of red out put transistor it should be above 70 volt. if it is zero then picture tubes cathode is short. if so u should replace the picture tube. for any further help yo can contact through fixya.

Dec 21, 2010 | Sony KV-20VM42 20 in. TV/VCR Combo

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Although tv is showing picture the colours only showing background etc are green and blue

Your TVs red colour output section has the trouble. There is no red output at the red cathode of the picture tube. The red, green, and blue output sections are on the picture tube base board. In some Philips model, these will be consists of transistors, and some has an IC or Tree ICs for three colour output used. You just open your TV, measure the voltages at these three cahodes. There will be markings on the printed circuit board for these cathodes marked as [Rk,Bk and Gk].
In your TVs case the voltage at the Rk marked pin will be higher that the other two cathodes. This can be caused by an open drive transistor or an Ic whichever may ysed there. If it is transistor, just replace it with a same type and number, as in the ace of ICs the related Ic, must be replaced. If only one Ic is uded for red, green and blue outputs, that Ic must be replaced.
If you need any more assistance, feel free to get me through Fixya. Ok.

Dec 01, 2010 | Philips CCB130AT 13 in. Combo

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Screen Doesn't Appear, power comes on but NO Picture,pls help

There are several possibilities that come to my mind about this problem.

Firstly, most problems come down to power, or rather a lack of - because of a component breakdown.

1]...It may sound obvious, but there could be a problem with the unit's internal power supply module that regulates the supply to the HT (High Tension) side of the circuit; It could be
a]...a transistor;
c] resistor;
d]...Or, but unlikely, a fuse.

this is the part of the main board that contains the line output transistors, line output transformer (LOPT) etc, & supplies the extremely high voltage (typically thousands of volts) to the crt (Cathode Ray Tube).

2]...It could be the line output transistor, or another component - such as a safety resistor - in the line out stage.
The line output transistor would be located on the heatsink, very close to the LOPT.

3]...It could also be the line output transformer;
a]...My first check for this would be for dry solder joints on the LOPT, on the underside of the main board.

I must stress, as a retired tv engineer myself, there are very dangerous voltages inside television sets, & I talk from experience - I've had some nasty shocks in my time, & it only takes a few milliamps of current to kill you, if it goes through your chest (Up one arm & down the other).

Even after a tv has been unplugged from the power socket, on the wall, it can contain dangerously high & possibly fatal voltages.

So please, DO NOT attempt this repair yourself, unless you are qualified to do so; either ask someone who you know, who is qualified, or take it to the tv repair shop.

I hope this has been of help to you.


Oct 01, 2010 | Televison & Video

1 Answer

The t/v screen suddenly turned green. the picture is clear but green/no color

Good day! the problem you have posted indicates that the 2 color cathode of your tv is not functioning, it's either that the driver transistor of the red and blue cathode is defective or the crt socket. or maybe the solder point in the crt board needs resoldering. check for some loose connections.

Sep 29, 2010 | Toshiba Televison & Video

1 Answer

No picture

Hi and welcome to fixya, it is the colour wheel problem,,,,,,,,,this is common problem please check it may be also cathode ray tube... thank u.........

Jun 03, 2009 | Televison & Video

1 Answer

Tv Screen Turns blue occassionally while running Toshiba DVD player

If the flashing is regardless of source, the CRT could be at fault. H to K short. ( heater to cathode)

Jul 23, 2008 | Toshiba MD20F51 20 in. TV/DVD Combo

1 Answer

TV is coming up in blue and green.

If some areas of the screen are blue and green while other areas are normal, then either the picture tube has been heavily magnetized or damaged by falling over. If there is any kind of magnetic field near the set, such as a large stereo speaker or elecrtic motor, move them away from each other, unplug the TV and let it sit for an hour or so, plug it in and turn it on. The TV demagnetizes the picture tube with each cold start. If the colors are still off then it may need a stronger external demagnetizer, but if the tube was damaged by shock then it cannot be fixed.

Jun 18, 2007 | Sylvania 6720FDD 20 in. TV/VCR/DVD Combo

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