Build Your Own Arcade Controls Forum
Main => Main Forum => Topic started by: RayB on September 17, 2004, 07:47:07 pm
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Hey,
I need to discharge a monitor, and like most first-timers to doing that, I feel very nervous about it. I followed Bob Roberts' plans on building his "SafeBack" discharger, but now I'm nervous about if I didn't build it right!!!
Anyone here use it? Should I wear rubber gloves when I use it? ;D
Ray B.
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I've never done it. What I do is take a length of wire, attach it to a flathead screwdriver, put an alligator clip on the other end. Clip to the monitor frame, and slip the screwdriver under the cap.
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Hmm! Well that's basically what Bob's discharger is. Except his instructions have us drill a hole through the screwdriver with the wire inserted and heavily soldered. I think the reason for that is that you are taking a risk if your clip should happen to get knocked off atthe same time as you are discharging.
OK, I guess I will be safe with this method then!
;D
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I built and used the BR one about 1 month ago, it worked great and I even heard the static pop sound. Hope this helps you.
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I too built one of the bob roberts one, except I couldn't drill through the screwdriver I bought (something about titanium being stronger than steel or somesuch... heh). I ended up grinding a nice groove around the shaft using a grinding wheel and then wrapped/soldered my wire directly to it that way. It has worked perfectly on several monitors now
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I used a jumper cable and clipped one end to the frame & a screwdriver to the other end. Slipped under the cap and.. it worked great!
Scott
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Well guys, I am back from the hospital now. They say I'll slowly regain use of my arm in about 6 months.
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Well guys, I am back from the hospital now. They say I'll slowly regain use of my arm in about 6 months.
YIKES! I hope you are not serious :-) I have a monitor I too am going to discharge this winter when I get a chance to do some work on this machine I have, so don't scare me like that or I'll be wearing a rubber suit when I do it haha
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I use a screwdriver with a clip on the frame too. I tried to build bob's but I lost interest after the drill broke. The clip works fine. I've used it dozens of times in G07's and a couple of wells garners.
It's pretty freaky discharging the flyback the first time. But after a while you get used to it. I like to hear that pop. If the monitor is cold, it won't pop or make any noise.
I suggest you make sure you hit the wire and leave it on there a few minutes before you remove the chassis. If not, then discharge it and then wait about 3-5 minutes and then do it again.
Also, be careful of that big cap on the board. It can bite too.
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one thing.... if the monitor has a hv rectifier, you could blow it. (You can build a small circuit to protect it)
Its very easy to tell if you have one because it will be in line ( big red wire the runs from the flyback to the cub )
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I was joking.
Um one thing I'm not clear on, when i slide the screwdriver under the cup, do I then take the cup and anode OUT? or am I supposed to leave it in?
If I take it out, what do I do to "discharge it again" as people suggest? Do I just waggle the screwdriver in the hole in the tube??
~Ray B.
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I was joking.
Um one thing I'm not clear on, when i slide the screwdriver under the cup, do I then take the cup and anode OUT? or am I supposed to leave it in?
If I take it out, what do I do to "discharge it again" as people suggest? Do I just waggle the screwdriver in the hole in the tube??
Yes, and yes.
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I was joking.
Um one thing I'm not clear on, when i slide the screwdriver under the cup, do I then take the cup and anode OUT? or am I supposed to leave it in?
If I take it out, what do I do to "discharge it again" as people suggest? Do I just waggle the screwdriver in the hole in the tube??
Yes, and yes.
YES and NO!
After you slide the screw driver under there, wait about 2-3 min. then do it again. If you don't hear a sound the second time (a pop or a sizzle) then you can remove the suction cup and there is NO need to stick the screwdriver into the hole at all! If on the 2nd time you still hear a sound, wait another 2-3 min and do it again.
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I was joking.
Um one thing I'm not clear on, when i slide the screwdriver under the cup, do I then take the cup and anode OUT? or am I supposed to leave it in?
If I take it out, what do I do to "discharge it again" as people suggest? Do I just waggle the screwdriver in the hole in the tube??
Yes, and yes.
YES and NO!
After you slide the screw driver under there, wait about 2-3 min. then do it again. If you don't hear a sound the second time (a pop or a sizzle) then you can remove the suction cup and there is NO need to stick the screwdriver into the hole at all! If on the 2nd time you still hear a sound, wait another 2-3 min and do it again.
Sorry, but you are wrong, XtraSmiley .
Please discharge the monitor again before you hook it back up. I learned the hard way. I was re-attaching the suction cup and using a screw driver to squeeze the clip together and my hand slipped from the handle of the screw driver to the metal shaft. Wow, talk about a jolt!
I'm sure it wasn't full voltage, since I had discharged it already, but for some reason, a charge can build again. In my situation it had been several hours that the monitor was sitting.
Anyway, even if you've discharded a monitor, go ahead and do it again just before you mess with the suction cup.
Rocky
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i dont know about you guys, but id wear rubber gloves anyways, lol
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Sorry, but you are wrong, XtraSmiley .
Please discharge the monitor again before you hook it back up. I learned the hard way. I was re-attaching the suction cup and using a screw driver to squeeze the clip together and my hand slipped from the handle of the screw driver to the metal shaft. Wow, talk about a jolt!
I'm sure it wasn't full voltage, since I had discharged it already, but for some reason, a charge can build again. In my situation it had been several hours that the monitor was sitting.
Anyway, even if you've discharded a monitor, go ahead and do it again just before you mess with the suction cup.
Rocky
Oh, sorry dude, yeah I never thought of that b/c I never had any problems with hooking it up later, I thought he meant during the disconnecting part. You only have to do it the way I described. Now after you are done hooking it back up, I've never done it again but I'll take your word that it's not a bad idea, you just have to be really carful to not scratch the glass.