charge storage in CRT Monitor

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A.Anand Srinivasan

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can someone tell me how long will there be charge storage in the monitor even after the power supply to it has been turned off....
 

In CRT few days, (or even more) I remember TV waiting for CRT replacemant till next day. Strong spark appeared during discharging the 25kV to GND. BUT! there are voltage multiplayers with 100 Mohm resistance between anode and GND, in this case there is no charge on anode.

Also impostant is the way the TV has been switched off (the screen was at full brithness or at blanking).

There is another place that is storing dangerous energy.
The main capacitor (200uF/385V) at the mains input (directly after rectifier) .
I remember the case when I put TV on the shelf and after the lunch I took it off from the shelf putting the nacked hand under the PCB .

High voltage (300V) discharge current was very unpleasent.
 
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