step by step on cap replacement?

the binary c0de

Kasumi Todoh's Training Partner
20 Year Member
Joined
Aug 19, 2003
Posts
1,858
Any photos of the caps or especially a before & after pic of replacing caps would be amazing. I don't know where to get a cap kit & how much I'm looking at. Capacitors? Please visually guide me if at all possible. Thank you.

my screen is very dull & if I turn up sharpness & brightness all detail blurs away. Whites are dull yet still blur out.
 

the binary c0de

Kasumi Todoh's Training Partner
20 Year Member
Joined
Aug 19, 2003
Posts
1,858
tube.jpg

num.jpg

can someone show me the caps you all speak of? Its a zenith. Heal my neo oh great ones.
 

ttooddddyy

PNG FTW,
Joined
Nov 29, 2001
Posts
8,335
The CRT is a Zenith but the monitor pcb/chassis may be something else, possibly a W&G. If the CRT is down then a cap kit will not help.

Check out these links

Whats it all about
http://www.alsarcade.com/capkit.htm

Electro who ?
http://www.ionpool.net/arcade/tech/capacitor_faq.txt
http://www.indstate.edu/ect/Demo 130/Capacitors.mht

Cross reference for monitor electro caps
http://www.multigame.com/CapKitCrossReference.pdf
http://www.ionpool.net/arcade/capkits/capkits.html
http://therealbobroberts.net/k7000.html

ID your monitor (older models)
http://www.jomac.net.au/mon.htm
http://homearcade.org/BBBB/monitor.html

Buy your kits here

PS if you are able to identify the monitor mother board and post a piccy of the symptom, may be able to single out the one electro causing the problem (assuming it is a cap problem) from your description it may be the CRT itself with low emission. If your OK with soldering might as well do the lot in one hit :spock:
http://therealbobroberts.net/caps.html
http://www.happcontrols.com/monitors/490549001.htm

For good measure- some schematics
http://wgec.com/service/
http://randyfromm.com/amusements/techdept/

49503300.jpg

98f0_1.JPG


Hope this helps
 
Last edited:

ttooddddyy

PNG FTW,
Joined
Nov 29, 2001
Posts
8,335
SuperGunGuru said:
I'm 99.9% sure that monitor is a Wells Gardner K7000 series.

Yes it is a WG-K7000.

Board ID http://homearcade.org/BBBB/7000.html

Cap map http://homearcade.org/BBBB/k7000lyot.html

Wells Gardner K7000 Series Monitor cap listing

C10 33u 25V
C11 22u 25V
C12 1u 50V
C13 22u 25V
C18 1u 50V
C20 10u 50V
C21 10u 50V
C22 1u 50V
C23 47u 25V
C40 2200u 35V
C42 1000u 16V
C45 470u 16V
C46 470u 16V
C48 100u 35V
C50 1000u 25V
C56 22u 160V
C57 47u 200V
 

galfordo

Analinguist of the Year
15 Year Member
Joined
Mar 14, 2003
Posts
18,418
I'm not quite ready to kill myself.

I'll return to this thread when I'm around 45 or so.
 

the binary c0de

Kasumi Todoh's Training Partner
20 Year Member
Joined
Aug 19, 2003
Posts
1,858
Thank you for the fantastic details & links. I'm excited about this venture.
 

ttooddddyy

PNG FTW,
Joined
Nov 29, 2001
Posts
8,335
Galfordo. Please remove that sig pic, it is disturbing.
Edit: and you may wonder why we are loosing the war :oh_no:
 
Last edited:

the binary c0de

Kasumi Todoh's Training Partner
20 Year Member
Joined
Aug 19, 2003
Posts
1,858
I appreciate all the help, absolutely, but can anyone possiblke post a link where I can actually buy the caps thats still active? I tried radio shack & they don't even carry 80% of them. Thanks again everybody.
 

channelmaniac

Mr Neo Fix-it
15 Year Member
Joined
Nov 29, 2005
Posts
4,316
It's cake.

You need a flathead screwdriver with a long shaft and a wire with aligator clips on each end.

Clip the screwdriver shaft to the monitor chassis with the wire and slide it under the 2nd anode cap (fancy term for the suction cup on the side of the crt) and listen for the crackle. Touch the screwdriver tip to the metal connector under the cap.

Wait five minutes and repeat. The reason for this is that sometimes the charge is unbalanced inside the CRT so you discharge it only partially. If you wait & do it again then you are just being safer. Getting zapped by one of those things hurts - just ask my wife! :D

When done with the second discharge attempt touch the tip of the screwdriver against the metal connector and hold it there while you peel back the cap with your fingers. Then push the connector together with the screwdriver and pop it right out of the hole in the side of the CRT.

Cake.

Don't forget there's usually a ground wire from the DAG ground (the wire that goes around the back of the CRT to drain the static from the surface) to the neck board. Sometimes these plug into the neck board, sometimes they solder to it and need to be cut so you can pull the board set all the way off the monitor
chassis.

Oh, also there may be a bead of silicone running around the CRT socket to keep the neck board on through many heat cycles. You may need to cut CAREFULLY through it with a razor knife to be able to take the neckboard off.

RJ
 

lizardlick

Kuroko's Training Dummy
Joined
May 14, 2007
Posts
78
Looks like I'm a day late and a dollar short on this one, but we carry the cap kit for the WG K7000 series monitors, in case you ever come across another one. Here's a link to a tutorial I made for one of my customers who was swapping out the chassis on his Electrohome GO7:

http://www.lizardlickamusements.com/pages/g07_removal.shtml

I realize it's a different brand of monitor, but the discharging part is essentially the same for all monitors. I thought some visuals might help you out...

Chad
http://www.lizardlick.com
 

norton9478

So Many Posts
No Time
For Games.
20 Year Member
Joined
Oct 30, 2003
Posts
34,075
lizardlick said:
Looks like I'm a day late and a dollar short on this one, but we carry the cap kit for the WG K7000 series monitors, in case you ever come across another one. Here's a link to a tutorial I made for one of my customers who was swapping out the chassis on his Electrohome GO7:

http://www.lizardlickamusements.com/pages/g07_removal.shtml

I realize it's a different brand of monitor, but the discharging part is essentially the same for all monitors. I thought some visuals might help you out...

Chad
http://www.lizardlick.com

Cool beans...

Do you plan on stocking any other Electrohome cap kits?

Also, do you remember which EH-G monitor has the cap that is labeled backwards on the board?
 

lizardlick

Kuroko's Training Dummy
Joined
May 14, 2007
Posts
78
Well... since we've taken the plunge into the Japanese parts business, hehe, everything else has kind of taken a back seat. We do plan on carrying more cap kits, but it will be some time before any new ones show up on the website.

There is one cap on the G07 that has the polarity incorrectly screened on the solder side of the board, it's C302. It is marked correctly on the parts side of the board though...

Chad
http://www.lizardlick.com
 

ttooddddyy

PNG FTW,
Joined
Nov 29, 2001
Posts
8,335
lizardlick said:
Well... since we've taken the plunge into the Japanese parts business, hehe, everything else has kind of taken a back seat. We do plan on carrying more cap kits, but it will be some time before any new ones show up on the website.

There is one cap on the G07 that has the polarity incorrectly screened on the solder side of the board, it's C302. It is marked correctly on the parts side of the board though...

Chad
http://www.lizardlick.com

May be worth noting the polarity of each one as they are removed from the board
 

lizardlick

Kuroko's Training Dummy
Joined
May 14, 2007
Posts
78
It's always a good idea when you're doing your capping a monitor for the first time to pull one out, note the polarity, and then immediately put the new one in. I'm at the point where I've done so many G07's, I just yank them all at once... If you're going to be doing these a lot, it's a good idea to get some kind of desoldering tool also, it helps tremendously...

Chad
http://www.lizardlick.com
 

norton9478

So Many Posts
No Time
For Games.
20 Year Member
Joined
Oct 30, 2003
Posts
34,075
lizardlick said:
It's always a good idea when you're doing your capping a monitor for the first time to pull one out, note the polarity, and then immediately put the new one in. I'm at the point where I've done so many G07's, I just yank them all at once... If you're going to be doing these a lot, it's a good idea to get some kind of desoldering tool also, it helps tremendously...

Chad
http://www.lizardlick.com

Yeah that's a good Idea...

I'd have to mark all the new components so that I'd know what is what....

I just figured It would be easier to pull them all first for the sake of efficiency...

Still it's good to know where ones are marked wrong.... Cuz you might forget.
 

the binary c0de

Kasumi Todoh's Training Partner
20 Year Member
Joined
Aug 19, 2003
Posts
1,858
well, I did it & it doesn't work right now. Booted up ok, but now its just three horizontal lines on the screen around the middle. Any idea what went wrong without needing to see a pic? I'm pretty positive that I got the direction right on all the caps as I replaced them one at a time. I COULD have bled solder on one or two of themsince they were very close in some places. Anyone know what caps would make this happen or anything?
 

ShmengeTravel

Mature's Make-up Artist
Joined
Nov 1, 2003
Posts
1,372
Anybody know a place where I can buy the alligator clips with the wire? I'm gonna try an auto parts store tomorrow. I found some alligator clips but they dont have a wire and im not sure what gauge I should use when discharging a tube.
 

channelmaniac

Mr Neo Fix-it
15 Year Member
Joined
Nov 29, 2005
Posts
4,316
Need to see pics to better understand what your monitor is doing.

As for the alligator clips and wires... Radio Shack has them. Catalog # 278-001, $6.99

The wire can be small - 24 gauge is plenty enough as the current is very small.

RJ
 

the binary c0de

Kasumi Todoh's Training Partner
20 Year Member
Joined
Aug 19, 2003
Posts
1,858
neogeo.jpg

thats what its doing now.Thoughts? Thanks. I miss my neo....
 

ShmengeTravel

Mature's Make-up Artist
Joined
Nov 1, 2003
Posts
1,372
thanks channel, and yeah believe it or not im about to do a cap kit on my monitor with a similar problem, this is what my virtua fighter looks like:

http://img406.imageshack.us/img406/4610/virtuafmp2iz8.jpg

where everything just seems to kind have compressed itslef into a white line in the middle of the screen. I wonder if both our issues are the same problem, my monitor is a nanao, tho.
 

norton9478

So Many Posts
No Time
For Games.
20 Year Member
Joined
Oct 30, 2003
Posts
34,075
ShmengeTravel said:
thanks channel, and yeah believe it or not im about to do a cap kit on my monitor with a similar problem, this is what my virtua fighter looks like:

http://img406.imageshack.us/img406/4610/virtuafmp2iz8.jpg

where everything just seems to kind have compressed itslef into a white line in the middle of the screen. I wonder if both our issues are the same problem, my monitor is a nanao, tho.

Widescreen FTW!
 
Top