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From: gmg@hcx.uucp (Greg M. Garner)
Newsgroups: comp.sys.amiga
Subject: Re: 1084s goes poof. Film at 11.
Summary: Danger!!!!!!
Message-ID: <1059@cseg.uucp>
Date: 2 Nov 88 01:49:45 GMT
References: <8097@gryphon.CTS.COM> <106@cs-spool.calgary.UUCP>
Sender: netnews@cseg.uucp
Organization: College of Engineering, University of Arkansas, Fayetteville
Lines: 53


In article <106@cs-spool.calgary.UUCP>, paquette@cpsc.ucalgary.ca (Trevor Paquette) writes:
>   I had the same problem with my 1080, though not a severe as yours. It
> would pop about every 2 hours or so. What is did was this:
>    1) Open it up.
>    2) Get your handy dandy low power dirt sucker and try to get all the loose >       dust
>    3) With a damp cloth start getting rid of as much dust and dirt as you can.
>    4) close it.
> 
>  I did this and it has not popped since. This was about 5 months ago.
> =============================================================================
> Trevor Paquette - GraphicsLand, U of Calgary[Home of The Great Train Rubbery]
> UUCP: ...!{ubc-cs,utai,alberta}!calgary!paquette        ICBM:51 03 N/114 05 W
>    Luminous beings we are, not this crude matter. *** Don't worry, be happy 

I hope thousands don't reply to this message, but it is very dangerous to 
take a damp cloth and put it anywhere near the open back of a crt. The 
crt tube is a _VERY_ _LARGE_ capacitor, and it stores around 20,000 volts
on it ****EVEN WHEN THE TV OR MONITOR IS OFF*****. You can be killed if
you poke around in the back of a crt without first discharging the tube!
   The best procedure to follow when planning to open up a crt cabinet 
and poke around is as follows:

1) Take your left hand and put it in your back pocket. This is not a 
joke, I am very serious. Do not remove your hand from your pocket 
until you KNOW beyond a shadow of a doubt that the CRT tube has been
discharged. The reason behind this is so you cannot have a current 
travel from your right arm, through your heart, and out your left 
arm to a ground. This type of current is quite capable of stopping
your heart.     

2) Take a long bladed, plastic handled screwdriver, and short the CRT
tube to the TV or monitor frame ground.  The ground is usually a wire 
that is wrapped around the edge of the crt, holding it in place.
The screwdriver must be inserted under the dust cover of the high
voltage wire going into the tube, and then shorted to frame ground
at the same time. Note that you should hear a spark when the thing
actually shorts.

3) Repeat the shorting action 3 or 4 times, as the tube will build back
up (voltage). After the tube has been shorted 4 times, it should be 
much safer to poke around in the CRT.

4) Now you can clean the crt if you like!


/* I accept no resposibility for the above procedure, but I am trying 
   to make sure that anyone performing this minimizes his/her chance
   of getting hurt. I have been shocked by a crt tube, and it does
   not feel good. Be careful!  */

    Greg Garner
    gmg@hcx      or    gmg@192.31.86.209
    501-442-4847