Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

charge storage in CRT Monitor

Status
Not open for further replies.

A.Anand Srinivasan

Advanced Member level 5
Joined
Oct 15, 2005
Messages
1,804
Helped
257
Reputation
514
Reaction score
39
Trophy points
1,328
Location
India
Activity points
10,680
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....
 

AndrzejM

Member level 4
Joined
Dec 3, 2004
Messages
71
Helped
12
Reputation
24
Reaction score
3
Trophy points
1,288
Location
Szczecin-Poland
Activity points
1,053
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.
 
Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top