Author Topic: WG K7197 issues (including a lot of smoke) (Read 3896 times)

Nipedley · « **on:** May 19, 2006, 12:22:00 pm »

Okay well today me and my friends were playing on one of my machines and all of a sudden the picture grew really small, all of the colours faded (it was barely visible) and I heard a "tchhhhh" sound, sure enough I take off the back and smoke wofts out. Err, any chance of fixing this myself or should I just go for a chassis replacement?

Also, any idea on what caused it?

Kevin Mullins · « **Reply #1 on:** May 19, 2006, 01:11:12 pm »

Did ya happen to spot where the smoke came from ?

Possibly the flyback transformer.
(black block, with big red wire lead to the glass tube)

Nipedley · « **Reply #2 on:** May 19, 2006, 01:34:25 pm »

Very hard to see in my cab unfortunately so no, just noticed it was coming from the chassis' direction! I could see the LOPT though and it didnt look black, also I think if it was the LOPT the screen probably would have gone off rather than shrink and fade ? (also burnt and smelled a bit more! this more like a normal IC burning (have experienced that before))

Kevin Mullins · « **Reply #3 on:** May 19, 2006, 02:53:14 pm »

Well, if something smoked that bad there should be some residual blackness on the chassis somewhere....

Nipedley · « **Reply #4 on:** May 19, 2006, 03:50:24 pm »

I'll see what I can find tomorrow, too dark now. =) Thanks for the help, I think I will just go for a replacement though, any recommendations? I've noticed Alva Amusements recommended before, but do they ship to the UK?

Kevin Mullins · « **Reply #5 on:** May 19, 2006, 07:17:25 pm »

From the sound description ... take a good look at all the capacitors too and see if any "popped". (just an idea)

I've heard alot of good so far about Alva Amusements.
They carry the Wei-Ya brand replacement chassis. ( 825HR and such )
Shoot'em an e-mail and inquire on the shipping or they may redirect you to someone there. Ask them the specifics for your model though.

alvaamuse@aol.com

Nipedley · « **Reply #6 on:** May 20, 2006, 04:57:08 am »

Yeah I'll check for the caps in a sec, it was having other problems though so it probably is easier just for me to get a replacement. I'll see what they say, thanks!

Nipedley · « **Reply #7 on:** May 20, 2006, 05:23:34 pm »

Well, I cant see anything wrong myself. I mean, there appears to be a bit of browning around the LOPT but that's probably just the same dirt the rest of the cab is caked in. Of course I cant see the caps in the LOPT area itself due to wires + dirt + awful positioning, but I can't imagine anything else would produce the results I saw.. I'll do a check on the other boards + power supply just incase, but since it was having issues anyway, not to mention what happened to the image, I'd imagine it'd likely be the monitor.. right..?

SirPeale · « **Reply #8 on:** May 20, 2006, 05:35:23 pm »

You'd probably be able to see problems better if you pulled the chassis from the monitor.

Nipedley · « **Reply #9 on:** May 20, 2006, 05:36:40 pm »

Quote from: Peale on May 20, 2006, 05:35:23 pm

You'd probably be able to see problems better if you pulled the chassis from the monitor.

That is quite true, is that easy to do when its vertical? I dont fancy unbolting it from the machine and trying to get it to sit right on a table unless I really have to. I've just started working on the rest of the cab's electronics (monitor death gives me time to fix the rest of it up) so I'll get to removing the chassis soon

SirPeale · « **Reply #10 on:** May 20, 2006, 05:54:49 pm »

It's a K7000...one of THE easiest monitors to work on.

Remove the yoke plug, the power plug, the video input, the HV anode wire from the tube, the degaussing plug, the sattelite control (if it has one) and either one or two screws right in the open, and that's it.

Nipedley · « **Reply #11 on:** May 20, 2006, 06:34:58 pm »

Ah right, just wasnt sure whether vertical would give me a good position to try and remove the thing. Luckily by now I'm no stranger to monitor work, so I'll get on that soon. Gotta dissassemble/clean/order replacement parts for the rest of the cab first. Thanks for the help!

grantspain · « **Reply #12 on:** May 22, 2006, 03:38:31 am »

hiya,blown another one up have you

-i reckon its the lopti by your fault description,btw i looked at your picture and im sure i can see a burn up burst at the bottom of the lopti

Nipedley · « **Reply #13 on:** May 24, 2006, 02:58:39 am »

Ehehe, you know me too well! You're right there is some blackening at the bottom of the LOPT, it has other problems too though so I'm just going to get a new one (will keep this as a spare though).

On that note, how long does Alva Amusements take to reply? I sent them an email last friday and havent heard anything back yet

Ken Layton · « **Reply #14 on:** May 24, 2006, 09:57:39 am »

If you haven't heard back from Alva yet, it's possible AOL's stupid spam filters may have deleted your email. I know because it happens to me all the time. Try resending from a couple of alternate email addresses and request return receipt.

The Wei-ya 825H is the perfect replacement for your monitor. How to change it out on your particular monitor is shown is detail at:

http://home.earthlink.net/~arcadeparts/index.html

Nipedley · « **Reply #15 on:** May 26, 2006, 10:56:27 am »

Since I still dont have a reply, I think you may be right! Thanks for the info, this machine restore is going so much more smoothly now that I have the experience from last year

Ken Layton · « **Reply #16 on:** May 26, 2006, 11:07:54 am »

If email isn't getting thru, I'd telephone them instead.

Nipedley · « **Reply #17 on:** May 27, 2006, 07:34:50 am »

I would but being in the UK I wouldnt like to imagine the cost

Nipedley · « **Reply #18 on:** June 03, 2006, 08:03:06 am »

They still haven't got back to me, and I've emailed em several times again. :/. Are there any other suppliers of this chassis I can try? I need to get one from somewhere..!

Ken Layton · « **Reply #19 on:** June 03, 2006, 10:33:02 am »

The arcadeparts link I provided above also sells the Wei-ya chassis.

Nipedley · « **Reply #20 on:** July 01, 2006, 07:04:19 am »

Just thought I would let you guys know I'm yet to receive a reply from Alva, and Video1963 did email me once asking my address about 3 weeks ago and havent replied since (I also tried emailing them from 2 other accounts). I'm beginning to think I should just give up... but then what do I do with a 300 pound useless arcade machine sitting in my shed?

No, I shan't give up. But I need a new chassis, any other places that might actually help me out here?

Ken Layton · « **Reply #21 on:** July 01, 2006, 11:08:49 am »

Why not have one of the forum members on the east coast of the US make the purchase for you and have it shipped to you?

Kevin Mullins · « **Reply #22 on:** July 01, 2006, 12:02:16 pm »

Chad Entringer had a K7000 chassis up and ready to go posted on rgvac........ might ask him about getting one.

http://groups.google.com/group/rec.games.video.arcade.collecting/browse_thread/thread/5a9feced7e4aeda4/56ea34005b014215#56ea34005b014215

Nipedley · « **Reply #23 on:** July 01, 2006, 02:29:33 pm »

Thanks for the replies guys, I've shot off an email to Chad. I'll let you know what happens.
Sucks that these parts arent quite so available in the UK!

Nipedley · « **Reply #24 on:** July 11, 2006, 04:57:37 pm »

Well I got the monitor! Everything is looking good. I haven't hooked it up yet because I'm going to test out the other electronics of the cab first, make sure it wasnt a transformer that actually smoked or something. I've resurrected my Jamma -> Scart project and fixed the problem I had, so I will be using that tomorrow to test out the cab before I subject my sparkly new monitor to it (Just being cautious!) I'll let ye all know how it goes. Hopefully Terminator 2 will be back up and running in a couple of days!

grantspain · « **Reply #25 on:** July 11, 2006, 05:39:14 pm »

alright geezer,how much did the new monitor cost you???

Nipedley · « **Reply #26 on:** July 12, 2006, 04:47:23 pm »

Chassis only,

grantspain · « **Reply #27 on:** July 12, 2006, 06:15:08 pm »

keep us informed on your progress with this chassis,at 70 quid it is cheaper than repairing most(when you think a lopti can set you back 30 notes,h.o.t tenner and of course the time)anyway good luck and don't let the spiders get you

Nipedley · « **Reply #28 on:** August 16, 2006, 04:00:02 pm »

Heheh thought I'd let you guys know whats going on (It's 64 spiders now!) One spider in particular held me up for the past 2 weeks (Finally got the bugger yesterday) and in the other time I've been VERY busy.. real life, can be a ---smurf--- sometimes huh? I have been working on the rest of the cab, though (mainly today and yesterday..) Now cleaned out the entire cab (Dont like that ancient dirt and dead insects >.>) and tomorrow I'll be reinstalling the transformer and re-connecting all of the cabs main wiring. After that I'll be powering on to make sure the transformer is good (the transformer is also powering the power supply unit) and then once i know the rest of the machine is good I will be installing the new monitor chassis. Could be up and working tomorrow! If not, then very soon ^_^

After that's working I just have coin mechs and flourescent lamp left to do, then the machine is (technically) in perfect working order. Dont know what to do about those coin mechs yet though..

Nipedley · « **Reply #29 on:** August 17, 2006, 08:59:44 am »

Alrighty, spent about 3 hours on this today cleaning, checking, re-installing, checking again =D. New power supply (dont mind the dodgy mounting there.. heh, il fix that). Ready for power-on test whenever my parents get back. I cant remember which way on the switch is on and off, and I want somebody to be able to tell me if it starts smoking

Note: The monitor is still as-is, and disconnected. Once (if) the machine checks out a-ok for the power supply, transformer, and I know its all working then I will install the new chassis. I dont want to install a new chassis just to find out its my transformer thats smoked..

EDIT: Success! Discharging as we speak. That is, if I can find where to put the wire o.O Came in to examine the new chassis.

grantspain · « **Reply #30 on:** August 17, 2006, 06:27:54 pm »

c'mon hurry up the suspense is killing me

Nipedley · « **Reply #31 on:** August 18, 2006, 03:01:15 am »

Heheh =D I got the boards out, just havent put the new ones in yet. Was getting a bit dark! Will do in a couple hours =) Probably done by the time you read this anyway

Hmm, slight problem. The power cable in the machine for the monitor is 3 prong, the black + white wires and an earth wire that connects to the side of the monitor mount. But my new chassis is 2 prong, just the black + white wires. Problem is the machine's cable wont plug into the monitor x_x.

Now, I could snip the power cable off the old monitor (the 3 prong) its dead *anyway* and attatch that to the new monitor no problem, but the means I have for re-attatching the two (the monitor to the new power plug) I'm not so sure of. I could either use a terminal block, or a little piece of plastic with metal tubing in the middle (a crimp) but err.. would either be suitable for receiving 120v? I've only ever used them on low voltage stuff. Dont want to melt them x_x.

Kevin Mullins · « **Reply #32 on:** August 18, 2006, 10:15:22 am »

Do you still have the old chassis?
Can't you just take the matching harness from it?

Or in a pinch, use standard AC wire nuts.

Nipedley · « **Reply #33 on:** August 18, 2006, 10:55:50 am »

Aye that's what I did in the end, turns out my terminal blocks were rated up to 380v so I think they'll do nicely! Chassis is in and mostly connected but not entirely and sadly I now have more real life to contend with so update coming tomorrow! Real life permitting, of course.


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