Removing an Arcade monitor from cab

Archived from groups: alt.games.mame (More info?)

Hi my friends.

Maybe a "noob question" but I can't know everything :-) *lol*

I have a cab I want to remove the Arcade monitor (bad picture quality) and
replace it with a PC-monitor (easy to connect to my PC, etc.)

I know about the high "voltage" inside a monitor, but as I was told it is
not dangerous if I just stay away from the "tube connetion" on the "tube"
(in top of this picture
http://www.kengun.com/diverse/arcade/109-0927_img.jpg)

But from the "tube connection" the wire (orange color) goes to a print-card
(see this picture: http://www.kengun.com/diverse/arca [...] _img.jpg).
Now my question is; are there any danger with this wire and the connection
to the print-card?

I just want to remove all this stuff, but I do not risk my life :-) *lol*

Thanks for answering.

Ken

(Some pictures of my cab: http://www.kengun.com/diverse/arcade/)

Archived from groups: alt.games.mame (More info?)

"usenet" <reply.in.newsgroup@bitbucket.dave.null.net> skrev i melding
news:uf4j911614foi099krnhtkntrsevdeii89@4ax.com...
> On Sun, 29 May 2005 13:50:03 +0200, "Ken" <navn2000DELETE@hotmail.com>
> wrote:
>
>>Hi my friends.
>>
>>Maybe a "noob question" but I can't know everything :-) *lol*
>>
>>I have a cab I want to remove the Arcade monitor (bad picture quality) and
>>replace it with a PC-monitor (easy to connect to my PC, etc.)
>>
>>I know about the high "voltage" inside a monitor, but as I was told it is
>>not dangerous if I just stay away from the "tube connetion" on the "tube"
>>(in top of this picture
>>http://www.kengun.com/diverse/arcade/109-0927_img.jpg)
>>
>>But from the "tube connection" the wire (orange color) goes to a
>>print-card
>>(see this picture: http://www.kengun.com/diverse/arca [...] _img.jpg).
>>Now my question is; are there any danger with this wire and the connection
>>to the print-card?
>
> That "tube connection" and the wire are not going to kill you. The
> high voltage happens when the monitor is ON, especially with vector
> monitors.
>
> If you are working on the monitor you can get a nasty shock from that
> wire, so you want to discharge the tube BEFORE you begin the work.
> Ground one end of a wire and the other end to a screwdriver. Then
> work the screwdriver under that suction cup until you see or hear a
> snap of electrical discharge. It probably won't be much of a pop, but
> sometimes it is fairly loud. Sometimes there is no snap at all.
>
> Good picture located at
> http://www.ionpool.net/arcade/tubeswap/tubeswap.html
> shows one screwdriver and wire combination.

ok, but what is ground? Will my wife's butt work? *lol* :-)

Well I know ground is some "metal" but this doesn't help if this metal is
not "grounded" too, I guess. So I think there is something more about it,
or?

Ken

Archived from groups: alt.games.mame (More info?)

just clip the other end of the wire(from screwdriver) to the main metal
frame of the monitor....that's good ground! the CRT can built up another
charge just be sitting there(OFF), so i always touch the hole a few times
when removing or replacing the monitor's chassis(board you wanted to
remove)! if you have to remove the pcb and suction cup to remove the whole
monitor, remember after suction cup clip is off of CRT....the only thing
that can potentially shock you now is the CRT again because of built up
charge. that's why you ground it again before and after removals.

if at all possible, just stay away from suction cup/hole of CRT unless
working on the monitor!!!

hope this helps,
Kelly

> ok, but what is ground? Will my wife's butt work? *lol* :-)
>
> Well I know ground is some "metal" but this doesn't help if this metal is
> not "grounded" too, I guess. So I think there is something more about it,
> or?
>
> Ken
>

Archived from groups: alt.games.mame (More info?)

"God-Like Entity" <Omnipresent@All_Times> skrev i melding
news:qgoj91t9lvhlb3092r1haiv833drpscpd0@4ax.com...
> On Sun, 29 May 2005 14:26:20 GMT, Peale <apeale69@hotmail.com> wrote:
>
>>"Ken" <navn2000DELETE@hotmail.com> wrote in
>>news:M%hme.11414$SL4.254479@news4.e.nsc.no:
>>
>>> I have a cab I want to remove the Arcade monitor (bad picture quality)
>>> and replace it with a PC-monitor (easy to connect to my PC, etc.)
>>
>>Bad picture quality? Original arcade equipment is bad picture quality?
>>
>>Thanks for letting me know. I'll go downstairs immediately, pull my
>>monitors and install PC monitors.
>
> So are you saying Original arcade equipment never goes bad ?

Maybe he just missed that there are several others that replace Arcade
Monitors with "gone" picture quality;
http://www.ionpool.net/arcade/tubeswap/tubeswap.html :-)

Ken

Archived from groups: alt.games.mame (More info?)

"Peale" <apeale69@hotmail.com> skrev i melding
news:Xns96659E07116DBapeale69hotmailcom@130.81.64.196...
> God-Like Entity <Omnipresent@All_Times> wrote in
> news:qgoj91t9lvhlb3092r1haiv833drpscpd0@4ax.com:
>
>> On Sun, 29 May 2005 14:26:20 GMT, Peale <apeale69@hotmail.com> wrote:
>>
>>>"Ken" <navn2000DELETE@hotmail.com> wrote in
>>>news:M%hme.11414$SL4.254479@news4.e.nsc.no:
>>>
>>>> I have a cab I want to remove the Arcade monitor (bad picture
>>>> quality) and replace it with a PC-monitor (easy to connect to my PC,
>>>> etc.)
>>>
>>>Bad picture quality? Original arcade equipment is bad picture
>>>quality?
>>>
>>>Thanks for letting me know. I'll go downstairs immediately, pull my
>>>monitors and install PC monitors.
>>
>> So are you saying Original arcade equipment never goes bad ?
>
> Of course not. By his statement it sounds like he's stating the the
> arcade monitor doesn't give a good picture by it's nature. If it's just
> a bad monitor, then that I can understand.
>
> --
> Do you want a free iPod?
> http://www.freeipods.com/?r=15154431

I still wonder if I can carry on removing the Arcade monitor without first
doing the decharging. Are there really big chance to get "shocked" if I'm
carefull with touching everywhere? Have anyone removed and Arcade monitor
without decharging it first? It's probably not that dagerous after all. It's
maybe just me that think this is very dangerous to do.

Ken

Archived from groups: alt.games.mame (More info?)

Ken wrote:
-----8<-----
> I still wonder if I can carry on removing the Arcade monitor without first
> doing the decharging. Are there really big chance to get "shocked" if I'm
> carefull with touching everywhere? Have anyone removed and Arcade monitor
> without decharging it first? It's probably not that dagerous after all. It's
> maybe just me that think this is very dangerous to do.
>
> Ken

<AHEM> (From http://www.eio.com/repairfaq/REPAIR/F_humor.html)

|| Chapter 32) How High Do You Jump (Discharging a TV)?
||
|| (From: Bert Christensen).
||
|| A tech that worked for me many years ago was holding on to a chassis
|| and leaning forward to see something on the other side. He was always
|| rather careless and had hooked up the HV lead in a sloppy manner.
|| His forehead came in contact with the 30kv. He jumped up into the
|| air, turned around twice, said, "I almost f___ING killed myself,
|| walked out into the customer waiting area and cried. Ten minutes
|| later he was in working on the same set.
||
|| We later drew a scale on a leg of the bench. One inch represented how
|| high you jumped with 1 KV and 25 inches for 25 KV, etc. It was
|| remarkably accurate.
||
|| (From: Vic Tosca (tosca@warwick.net)).
||
|| That's a KICKER!! I've got the same thing here, but I have it scaled
|| to .808 in/KV. I found that's the accurate formula for the average
|| weight bench tech, including glasses and pocket protector. We also
|| put a bell on the ceiling- anyone that hits it with his head because
|| of a shock gets a day off!
||
|| It's located right under the emergency repair tool kit, which
|| consists of a rabbit's foot, a magic wand, a crystal ball, and a
|| hammer. We had to get rid of the hand grenade...insurance laws,
|| y'know. THAT was a *great* tool for tough dogs and irate customers!
||
|| Clients love it.

If you are /still/ thinking <bubba>"Heck, ain't *nuffin* to it. It
ain't dangerous 'tall!"</bubba>, check out this link:
http://www.arcadecontrols.com/arcade_monitors.shtml


Sufficiently cared yet? If so, you */might/* be ready to follow these
instructions: http://repairfaq.ece.drexel.edu/sam/tvfaq.htm#tvsafdis

--
Thnik about it!
Deadly_Dad

Archived from groups: alt.games.mame (More info?)

usenet wrote:
-----8<-----
> Good story Dad, but he was working on a monitor that was ON at the
> time. The shock from a monitor that has not been discharged is not
> severe or even painful in my opinion.
-----8<-----

.....(My *GOD*)..... You /obviously/ only touched a low-voltage circuit.
Either that, or you simply don't remember exactly how you ended up
falling asleep on the floor across the room from the chassis.

Fear not. I found this /excellent/ (and simple) discharging walkthrough:
http://www.twistedmods.com/article [...] 213&page=2

Please note: "Up to 27,000VDC at 30 amps can run through this thing at
any given time… even when it’s off." You do /not/ want to know what
that feels like. In fact, there is a chance that if you do, you won't.
Ever.

--
Thnik about it!
Deadly_Dad

Archived from groups: alt.games.mame (More info?)

On Sun, 29 May 2005 13:50:03 +0200, "Ken" <navn2000DELETE@hotmail.com>
wrote:

>Hi my friends.
>
>Maybe a "noob question" but I can't know everything :-) *lol*
>
>I have a cab I want to remove the Arcade monitor (bad picture quality) and
>replace it with a PC-monitor (easy to connect to my PC, etc.)
>
>I know about the high "voltage" inside a monitor, but as I was told it is
>not dangerous if I just stay away from the "tube connetion" on the "tube"
>(in top of this picture
>http://www.kengun.com/diverse/arcade/109-0927_img.jpg)
>
>But from the "tube connection" the wire (orange color) goes to a print-card
>(see this picture: http://www.kengun.com/diverse/arca [...] _img.jpg).
>Now my question is; are there any danger with this wire and the connection
>to the print-card?
>
>I just want to remove all this stuff, but I do not risk my life :-) *lol*
>
>Thanks for answering.
>
>Ken
>
>(Some pictures of my cab: http://www.kengun.com/diverse/arcade/)
>
>

You only need to ensure that the picture tube is discharged if you are
seperating the tube from the chassis. Most monitors will discharge the
tube by itself within and hour. Even if it doesn't, it's safe to
handle a monitor with charged tube.

Archived from groups: alt.games.mame (More info?)

On Sun, 5 Jun 2005 00:13:10 +0200, "Ken" <navn2000DELETE@hotmail.com>
wrote:

<snip>

>I tried today to discharge the monitor with the
>"grounded screwdriver". I asume it went well, because I'm still alive ;-)
>and I jammed the screwdriver under the suction cup and touched both of the 2
>leads (one is enough). I did see those two leads, so I'm sure I hit them
>hard :-). I didn't hear any "zap" or so, but I asume, as you also say, that
>the monitor already had discharged by itself.

You might want to look into getting a high voltage probe. I just
bought one for about US$100 (expensive, I know!) but it's nice as it
has an analog gauge (a needle) on it that shows the voltage dropping
to zero (from 20kV on my 19" monitor). It's reassuring to me to see 0
volts.

Plus, it has a resistor in series so the monitor doesn't instantly go
from 20kV or whatever to 0V as it does with the screwdriver method.
I've heard that can stress out old monitors, though I have no proof.

Just some thoughts for you.

Good luck, and stay safe!


--
Rick

I'd like to say "Thank you" on behalf of the group
and ourselves and I hope we passed the audition!
(John Lennon)