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Main => Monitor/Video Forum => Topic started by: G1zm0 on March 20, 2008, 11:44:42 pm

Title: monitor discharge
Post by: G1zm0 on March 20, 2008, 11:44:42 pm

posting this on behalf of a m8, after a monitor/tv has been unpluged, how long does it take to totaly discharge itself without help?

Title: Re: monitor discharge
Post by: SirPeale on March 20, 2008, 11:50:40 pm

Depends on the unit.  It may take seconds.  Or years.  Or it may not happen at all.

That's why people discharge their own.  It's easy.

Title: Re: monitor discharge
Post by: northerngames on March 21, 2008, 12:35:59 am

yeah don't count on that method for your sake and well being.

Title: Re: monitor discharge
Post by: tba on March 21, 2008, 05:59:53 am

and don't forget, even after being discharged the monitor might "build up" a new charge after an amount of time, even if it is unplugged!

Title: Re: monitor discharge
Post by: Mrjamma on March 21, 2008, 10:21:11 am

Remember, a CRT behaves like a large capacitor when not in use. It holds a charge, for a variable amount of time.

If there is no leakage, nothing to discharge it, then theoretically it could hold a charge forever.

I doubt that is the case, but an old TV repairman told me once he had seen television sets that had been sitting for several years and still sparked pretty good when he went to work on them

Title: Re: monitor discharge
Post by: qrz on March 21, 2008, 01:59:27 pm

have serviced tv's for many years . i WILL vouch for that ! if no bleeder resistor present,  a crt can/will hold a charge for long periods.
remember, a capacitor is simply 2 conductors seperated by an insulator .
the conductive coating on both sides of crt glass ( not on the screen and neck - DUH )  becomes the cap
a small value cap ( called a gimmik ) can be made by twisting 2 insulated wires together ( NO conductive connection  !! ) the max voltage would be the insulation breakdown voltage of the wire used . 

qrz