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Main => Monitor/Video Forum => Topic started by: southpaw13 on July 02, 2008, 11:35:25 pm

Title: No green color on my monitor
Post by: southpaw13 on July 02, 2008, 11:35:25 pm

I bought a game today and it has no green color on the game itself.  The previous owner said it probably needs a cap kit.  I opened it up to find out the monitor is a WG K7203.  It was made in 2002.  The monitor looks pretty good (clean and no burn) so I am thinking that it probably does not need the kit.  I don't have any type of testing equiptment.  How can I find out if it is really the monitor or maybe the game itself.

Thanks for your help....

Title: Re: No green color on my monitor
Post by: SirPeale on July 03, 2008, 09:16:57 am

Swap the color inputs.  If the problem travels, it's the game.

Likely it's not the game.  It's probably the color transistor on the neckboard.  Green likes to go first  because it's nestled right between red and blue, and gets the heat from them.

Title: Re: No green color on my monitor
Post by: southpaw13 on July 03, 2008, 03:36:35 pm

Thanks!  I tried it and the monitor still did not work.  How hard and what is the easiest way to figure out which transistor it is?

Thanks for your help.....

Title: Re: No green color on my monitor
Post by: grantspain on July 03, 2008, 04:30:30 pm

compare the transistors with a multimeter

Title: Re: No green color on my monitor
Post by: SirPeale on July 03, 2008, 05:10:30 pm

On a WG it's almost always the middle transistor.  RGB after all.

Title: Re: No green color on my monitor
Post by: southpaw13 on July 06, 2008, 08:24:01 pm

Thanks, after taking the protective cover off the back of the neck board, the middle transistor made the board black.  So I am trying to find a replacement C3956 transistor.  Radio Shack does not carry them and most places on-line want you to buy in quantities.  I tried Mouser electronics too and they did not have them.  Any suggestions????

Thanks for your help...

Title: Re: No green color on my monitor
Post by: gatordad on July 06, 2008, 09:28:00 pm

Quote from: southpaw13 on July 06, 2008, 08:24:01 pm

Thanks, after taking the protective cover off the back of the neck board, the middle transistor made the board black.  So I am trying to find a replacement C3956 transistor.  Radio Shack does not carry them and most places on-line want you to buy in quantities.  I tried Mouser electronics too and they did not have them.  Any suggestions????

Thanks for your help...

Call WG and ask for parts

Title: Re: No green color on my monitor
Post by: SirPeale on July 06, 2008, 09:33:14 pm

Crosses to an NTE2521.  Mouser should have that.

Longshot, but try touching up the solder joints on all the color transistors.  I had one once that came completely unsoldered.  Once I soldered it back together it worked fine.  I'd still replace the transistor but in the meantime you could still play it.

Title: Re: No green color on my monitor
Post by: fargen on July 06, 2008, 09:55:16 pm

heya, try under 2sc3956 for searching also, might have better luck. Guy on ebay has them but the shipping is high. Hope this helps...sbm

Title: Re: No green color on my monitor
Post by: fargen on July 06, 2008, 09:57:29 pm

heya, also happ controls has 9 at the main warehouse so you could order from them. I dont know the minimum though...sbm

Title: Re: No green color on my monitor
Post by: southpaw13 on July 06, 2008, 10:47:57 pm

Thanks, I also sent Bob Roberts an e-mail.  He stocks a lot of stuff like this...

Title: Re: No green color on my monitor
Post by: southpaw13 on July 07, 2008, 11:40:59 am

What a pain it has been to get this part.  I ended up ordering it from Wells Gardner.

Thanks for your help,
More to come....

Title: Re: No green color on my monitor
Post by: SirPeale on July 07, 2008, 11:48:22 am

What was wrong with the NTE part?

Title: Re: No green color on my monitor
Post by: southpaw13 on July 07, 2008, 01:24:03 pm

I couldn't find it either.  Mouser didn't have it.  I could have bought it from Happs or American gaming.  All three had a minimum order so I went with Wells Gardner since they are close to home.

Thanks for the help...

Title: Re: No green color on my monitor
Post by: southpaw13 on July 09, 2008, 09:21:24 pm

OK, the transistor on the neck board did not work.  Any other easy suggestions before I give up?

Thanks for your help.....

Title: Re: No green color on my monitor
Post by: SirPeale on July 09, 2008, 10:38:55 pm

Touch up any and all solder joints on the board.  If you have access to a rejuvenator you can test the tube and see if the green gun is shot.  Check parts along the green circuit, see if anything isn't the way it's supposed to be.

Title: Re: No green color on my monitor
Post by: Arm123 on July 09, 2008, 10:48:39 pm

You should see if you can locate someone with a CRT tester / rejuvinator to rule out the weak gun

Title: Re: No green color on my monitor
Post by: SirPeale on July 09, 2008, 10:54:15 pm

Quote from: Arm123 on July 09, 2008, 10:48:39 pm

You should see if you can locate someone with a CRT tester / rejuvinator to rule out the weak gun

I think I said that...