Re: Discoloration on monitor after moving Space Duel upright

No, no, NO!!! When you discharge a monitor it has NOTHING to do with
connecting it to the planet Earth!!! The picture tube is a large
glass capacitor, the elements are the silver coating inside the tube
and the grayish-black (Aquadag) coating on the outside. Wehn you are
discharging a picture tube you are shorting the capacitor across it's
terminals - namely the HV cup and the metal strap that connects the
Aquadag to the metal chassis.

http://www.flippers.com/images/jan21_06.jpg

So, you do NOT need to have the game plugged in to discharge the
monitor, however you MUST be certain that the metal strap on the
picture tube is connected to the chassis - often via a black wire
from the strap that runs to either the neck board or a bolt/screw on
the metal chassis somewhere. If this strap is not connected to the
chassis then you can't reliably discharge the tube. Or you can use
the end of the strap as one tie point of your discharge device (I
recommend a HV probe) while the other end (insulated shaft!) goes
under the rubber cup to touch the HV connector to the picture tube HV
cup.

I hope that is somewhat clearer...
http://www.flippers.com/vid-tips.html#discharge

***Oh, and you do NOT need to remove the monitor to degauss the
control panel or monitor chassis if you can get the degauss tool
(Soldering Gun - Weller for example) to be able to go around/over the
item to degauss.

John :-#)#

At 2:06 PM -0500 5/22/06, Tim Soderstrom wrote:
>Well, I assume if you discharge it to the chassis, it would run through
>the power cable out to the outlet anyway correct? If so, I probably need
>to replace my AC cord since the person who owned this before me sawed off
>the ground prong (yeah, well, go figure :P).
>
>So just to be sure. If I don't discharge the monitor and somehow
>electrocute myself death isn't necessarily imminent? I always thought that
>HV devices like monitors only carried very small amps since it had to have
>been converted from the standard 120VAC? So if I was REALLY stupid and
>touched the discharge suction cup, it'll just hurt and I might loose a
>finger? :)
>
>Either way, I don't intend upon finding out :P Just curious for my own
>personal knowledge.
>
>I assume that I don't have a Weller soldering gun so until I do get one,
>is it reasonably safe to run the game in this condition?
>
>Again thanks for your help! Good to know that people are still into the
>whole Vector gaming thing :)
>
>Tim
>
>
>> On Mon, 22 May 2006, Tim Soderstrom wrote:
>>
>>> you talking about one of those hugs ones or just a dinky one you can buy
>>> from Radio Shack for $12.99? Also, does it have to be plugged in for
>>> this
>>> (I assume so?).
>>
>> The Weller gun-type gun, RS does sell one.
>>
>>> Also, you mentioned you pulled your monitor out. I've read articles
>>> about
>>> doing just that and, as I mentioned before, I don't want to die :) So I
>>
>> See, I told him not to put that in the FAQ. :-) You won't die, It may
>> hurt
>> like a SOAB, but you won't die unless you are really, really stupid, like
>> drop the thing on yourself.
>>
>>> was wondering how you discharged the electric buildup in the HV section
>>> and monitor? I read you can do the screwdriver method or buy a specific
>>
>> You want a high voltage (HV) probe. You can do it with a screwdriver and
>> resistors (do NOT short it with just a screwdriver) but an HV probe is a
>> usefull tool anyway. I got an old Heathkit from E-bay for under $20.
>>
>> And you discharge it to the monitor chasis. Do NOT discharge to a wall
>> outlet, as at least one web site has suggested.
>>
>>
>> ==========================================================
>> Chris Candreva -- chris@westnet.com -- (914) 967-7816
>> WestNet Internet Services of Westchester
>> http://www.westnet.com/
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> > chris@westnet.com
>>
>>
>
>
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-- 
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, VideoGames)
                  www.flippers.com
"Old pinballers never die, they just flip out"
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