Author Topic: Cut wire repair????? (Read 2766 times)

uolarethian · « **on:** April 29, 2014, 07:48:00 pm »

I picked up this monitor tonight (from my research i think it is a WG k7000) and it has a few cut wires. I think I know where they all go but I am wondering if it will hurt anything if i splice them back together. Here are a few pictures. What do ya think?

MK3FAN · « **Reply #1 on:** April 29, 2014, 07:52:16 pm »

That appears to be a 19" K7000. Splicing the wires will work fine but make sure you solder them well and use really good heat shrink because some of those neck board wires carry some good voltage and you don't want it to jump anywhere.

uolarethian · « **Reply #2 on:** April 29, 2014, 08:02:12 pm »

Thanks for the info. The only other question I have it that there are 2 sets of wires that seam identical coming from the neck board and they are both cut(3 blue and 1 white wire). My question is which goes to which. On image 2 there a set of wires on the top and bottom, and on image 3 there is the other half of a set of wires and an empty socket where the other one goes(i pulled it off to fix). So if we call image 2 top and bottom and image 3 right and left what goes to what.

I hope this isn't two confusing. Also I can upload larger images if that will help.

Thanks

uolarethian · « **Reply #3 on:** April 29, 2014, 08:06:45 pm »

larger image of chassis

uolarethian · « **Reply #4 on:** April 29, 2014, 08:09:10 pm »

lets try this again. larger image of chassis

MK3FAN · « **Reply #5 on:** April 29, 2014, 08:13:56 pm »

Unless someone else can chime in first, you'll have to wait until I get home from work to look at a spare one I have before I can answer your question. In the mean time, I would suggest giving that chassis a full cleaning and installing a new flyback/cap kit to ensure many more years of healthy operation.

uolarethian · « **Reply #6 on:** April 29, 2014, 09:23:07 pm »

I would greatly appericate the help. I plan on doing the flyback and cap kit as soon I verify I get a picture from the tube. I was told it works but I want to make sure the tube before I start replacing parts.

Thanks again for all the help

MK3FAN · « **Reply #7 on:** April 29, 2014, 09:45:58 pm »

You're welcome. I don't get home until roughly 12:30 am central time so if you're still up, that's when I can upload some pics for you.

MK3FAN · « **Reply #8 on:** April 30, 2014, 02:49:16 am »

P201 of neck board goes to P6 of main board

P202 of neck board goes to P5 of main board

Hope that helps.

uolarethian · « **Reply #9 on:** April 30, 2014, 07:43:19 pm »

Yes it does. Thanks so much for all the help.

MK3FAN · « **Reply #10 on:** April 30, 2014, 11:03:37 pm »

You're welcome. Let me know if you get it fired up. If you aren't comfortable doing cap kits, I offer the service. I don't currently have any 19" tubes that are compatible with a K7000, so I wouldn't be able to test it after doing the kit, but I have done MANY of them and I am confident in my work. Just throwing that out there if you haven't done them before or are weary of doing them. No big deal.

uolarethian · « **Reply #11 on:** May 01, 2014, 07:23:53 pm »

I might just take you up on that. Thanks

uolarethian · « **Reply #12 on:** May 08, 2014, 07:09:45 pm »

Ok, one last question and I should be able to get this thing tested in a day or two when I pick up some solder. I have 2 ground wires coming from the neck board. One goes to a screw on the chassis. My question is the only other cut wire i can find is attached to the tube, does it go there? The wire looks to be the same size and has the same markings.

MK3FAN · « **Reply #13 on:** May 08, 2014, 09:07:45 pm »

The two wires coming off the neck board's ground go to the chassis's frame and the tube's braided ground. Make sure one of them goes to the chassis and the other goes to the metal braid that is wrapped around the back of the tube.

uolarethian · « **Reply #14 on:** May 22, 2014, 09:26:06 am »

Ok, I got it all back together and fired up and the picture is pretty good I have to say but it has a slight jump to it. I tried adjusting the pots but nothing seams to help. Any suggestions?

uolarethian · « **Reply #15 on:** May 23, 2014, 05:51:39 pm »

MK3FAN · « **Reply #16 on:** May 23, 2014, 07:19:37 pm »

Can you post a video? Did you try adjusting the V.Hold pot? Is your "sync" wire hooked up correctly? Have you tried a different board to see if it's the board or the chassis causing the problem?

uolarethian · « **Reply #17 on:** May 23, 2014, 09:42:21 pm »

Sorry no video. I did try adjusting all the pots and i am sure the wires are all hooked up correctly. I did try two different pcb and I get the same jumping. Do you think a cap kit or fly back replacement will fix this issue?

MK3FAN · « **Reply #18 on:** May 24, 2014, 02:40:52 am »

Cap kit is always a good idea but no guarantees on fixing your issue. Is the jumping constant? I doubt it's the flyback.

uolarethian · « **Reply #19 on:** May 25, 2014, 03:17:13 pm »

yes, its constant. how about the cap kit, think that would help?

epicfatigue · « **Reply #20 on:** June 05, 2014, 08:57:01 pm »

Is it jumping or rolling?

Might be a sync issue and you need to tie them together

uolarethian · « **Reply #21 on:** June 07, 2014, 02:13:11 pm »

Here is a video of the problem

ed12 · « **Reply #22 on:** June 07, 2014, 02:28:34 pm »

are u running it with 15k s/w ?,because i see window's in the picture there.
also u may have a fly back going south..ie that ver sharp white line
u can clearly see every 30-60 sec's

ed

MK3FAN · « **Reply #23 on:** June 08, 2014, 11:12:25 am »

Are you using an isolation transformer? If not, it MUST be used for that model of chassis. Secondly, I'd install a cap kit, new voltage regulator and horizontal output transistor.

uolarethian · « **Reply #24 on:** June 08, 2014, 08:02:43 pm »

OK, I have tried running the monitor with two different jamma pcb's and with the vga to cga converter that is being used in the video and the problem happens with all input signals. I have installed a cap kit already as well and I am using an isolation transformer.

So which do you think would be the best next step, Voltage regulator , horizontal output transistor, or fly back?


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