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Tv tube how do you discharge a tv tube

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Posted on Nov 16, 2007

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1 Answer

Discharge a TV tube


If you need to remove the 2nd anode wire that connects to the opening in the top side of the tube do this:

Get a test lead with clips at both ends----connect one end to the spring and or thin strap across the bell of the tube---the gray coating on the tube is earth grounded.

Take a regular blade screwdriver and put other end of test lead to its shaft---lift up the rubber around the anode and you will see a hooked clip that you just push gently in on to pop the lead out----There may be a very brief spark when you contact the clip with the grounded test lead but just hold against the clip for a few seconds and the tube is discharged.

I do not need to remind you HAVE THE SET UNPLUGGED.!!

Look at the plug clip and push in until it engages to put it back.

IF YOU DO NOT NEED TO HAVE THE SPACE IN ORDER TO GET AT THE vcr HEAD---DON'T DO IT.

SAFETY FIRST!

Mar 21, 2012 | Televison & Video

1 Answer

Picture went completely fuzzy. What could the problem be?


The tv CRT( picture tube) have a radiaton posion infected in ur tv picture tube.This is how u discharge the CRT(picture tube) get the posion out.Take the tv back cover off.Take video board that connected to the CRT(picture tube) out.Plug it in,so u have a live current to the CRT(picture tube).Find a wire like an AV cable,should be find.One side of the metal,grounded to the metal frame somewhere.Take a long needle plier grab the other side of the AV cable wire,not the metal,(Caution high voltage live current).Come very close to the open CRT(picture tube).U will have a live current arc,than u,will hear a big "POP".U,just discharge the CRT(picture tube).The tv now the CRT(picture tube),now it good,it clear of posion infected in ur tv picture tube.Now,unplug ur tv.Put ur tv,back together.Hook up ur tv signal cable and plug in ur tv,now ur tv picture,will be clear,completely.I do this many times to dicharge fuzzy CRT(picture tube).When i was a tv Tech.for the SONY TV Corporation.

Oct 12, 2010 | Sanyo HT32546 TV

1 Answer

I hat a Hitachi 46F500 rear projection tv. I ordered a convergence repair kit and in the instructions I was told to unplug my tv for 3 days so that it can discharge.my question is will the tv discharge...


Actually, even after the 3 days, it can still have some residual high voltage floating around. The picture tubes are very efficient capacitors and retain the high voltage quite well. These have over 33000Volts sent to them which can cause quite a jolt. Caution is required to work on these sets.

Carefully follow all instructions and be extremely careful around the ends of the large red wires that go to the sides of the tubes. This is the high voltage connection point.

Dan

Jul 01, 2010 | Televison & Video

1 Answer

Do i have to discharge my set to fix the coaxial connection


I presume you are going to repair the co-axial socket on the PCB, you should not need to discharge anything as most power supplies contain bleeding resistors across the capacitors to discharge them slowly when powered down, if this is an older CRT TV please take note that the tube will hold it's charge for a long time but you should not need to go anywhere near this to while performing this task. Regards, acbva.

Mar 04, 2010 | Sharp 27C-240 27" TV

1 Answer

What is line input for?


Discharge the tubes anode to earth and wipe clean the HT tube lead with alcohol. If the crackling sound continues replace the HT tube lead andor LOPT. (if available) Moisture and dampness will aggrivate this symptom.

Aug 31, 2009 | GE 31GT660 TV

1 Answer

The tv makes a strange hissing sound at random times


sounds like there is a storm inside the set..!!!

the EHT connector is tracking to ground or the loptx is leaking and sometimes there is a smell when this happens.

i would not advise you to tackle this fault unless experienced at repairing tv's
as if you dont discharge the tube safely it may discharge through you !!!

but if you feel confident on doing this then take back off tv and in a dark room you maybe able to see the arc where its tracking.then its a case of replacing EHT cap , lead or even worse the loptx

but before you remove the EHT cap make sure that you discharge the tube to ground BEFORE removing it as crt tubes can remain charged for some time even days after the set has been switched off. 25kv jumping through your fingers is not nice.

best of luck.

Aug 18, 2009 | Broksonic Televison & Video

1 Answer

How to discharge tube


discharging the tube by putting the screw driver to the anode cap. the driver is connected to the groud of the tube..in order to minimized the electric charge in the tube an for safety too..

Sep 01, 2008 | Sony KV-32S40 32" TV

1 Answer

How to discharge capacitor


Most projection set will discharge them selfs to a safe level just after you unplug it. But being there are litterly hundreds of capacitor in this set you might want to describe the problem you are having before you gut the set

Mar 19, 2008 | Samsung PCJ522R 52" Rear Projection...

1 Answer

Proper grounding point for RCA F32650 TV


Leave set unplugged for a few hours = HV gone or discharge to CRT ground strap........................

Note: Part list.....257805 or ASTI 2078 xformer and
237470 horiz output xistor ( Do not use generic)
transistor must be first quality, no seconds ! !

Nov 25, 2007 | RCA F32650 32" TV

13 Answers

How to discharge the TV tube?


First off there is no capacitor that holds the High voltage on the tube. Its the tube itself that stores the charge and if you dont discharge a tube properly it will bite you!!You can disconnect the 2nd anode of the tube(thats what the cup is called)that puppy can hold a charge for months as I've picked up used tubes that other service men may have striped out of a junk sets and still got zapped weeks later and it can burn a hole right in you if it bites you the right way. That metal strap is the ground for the crt(the picture tube) The proper way to saftly discharge a crt would be to take a screwdriver perferably a flat tip and connect a cliplead to the screw driver and clip the other end to the ground strap. Carefully slide the screwdriver up UNDER the cup on the crt till you reach the middle of the tube as you will feel it as it wont go any farther. In the meantime you might hear a pop sound and that would be the dischargeing of the tube.. Keep that screwdriver in place a min. of 30 to 40 secs. then remove . Then pinch the cup the oppisite direction on both sides that the wire is running as the cup is held in place by a small hooks on both sides Be carefull not to rip off the cup or bend the small hole suround that the cup is attached. And never ever poke a hole in the cup as I've seen peeps do and when you turn back on a set you will have fireworks as the high voltage will arch out all over the place and if your hand or face is close to it it will get you too!! Now take the clip lead and attach to the grounding strap and clip the other end to where you just took off the cup and your all set.Good Luck with your repair

Mar 16, 2006 | Panasonic PV-C2010 20 in. TV/VCR Combo

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