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Fixing/ reducing Yoke buzz

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gozaimas View Drop Down
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    Posted: 16 Jul 2019 at 9:48am
Imported a cab from Japan last month and it has one of the loudest buzzes on its yoke I've ever heard. 

I called in a TV repair guy who deals with CRTs, and he essentially drizzled glue directly onto the Yoke itself, assuring me this would fix it. It absolutely did not! 

 I've heard it's possible to remove the yoke, clean the connection, and re-glue in order two fix/ reduce buzz like this, which I'd like to try. 

Has anyone ever tried this before/ have any tips/ photos. Obviously I don't want to make anything worse, but the buzz is so loud it can be clearly heard over game sound, so I have to do *something*.

Monitor is a dinky 18inch (15kHz only). 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote TheDaddy Quote  Post ReplyReply Direct Link To This Post Posted: 16 Jul 2019 at 9:56am





Sorry could not resist !

Edited by TheDaddy - 16 Jul 2019 at 9:56am
AKA Wonderboy.
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Monstermug View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Monstermug Quote  Post ReplyReply Direct Link To This Post Posted: 16 Jul 2019 at 10:21am
I'm assuming it's a Capcom cute monitor.  It's a common problem.  Check to see if there is any movement on the yoke.  If so you can wedge something plastic between the yoke.  That might help.  
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Post Options Post Options   Thanks (0) Thanks(0)   Quote M K L Quote  Post ReplyReply Direct Link To This Post Posted: 16 Jul 2019 at 10:55am
As a first step, it is necessary to understand if the issue is with the horizontal or the vertical coil. Disconnect the vertical coil and if the buzz is still there covering the yoke with glue is pointless because the coil on the outside is the vertical one. The horizontal coil is under the yoke and impossible to reach without removing the yoke which I'm not sure you want to do and it cannot be ruled out that the issue is chassis related.

Edited by M K L - 16 Jul 2019 at 10:56am
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Monstermug Quote  Post ReplyReply Direct Link To This Post Posted: 16 Jul 2019 at 1:26pm
Personally I wouldn't remove the yoke unless you know what you are doing.  You be there for ages trying to get the convergence and purity alignments right.  If you really want to, I heard if you take off the yoke and dip it in a clear varnish.  Something like this https://uk.rs-online.com/web/p/electronics-varnishes-lacquers/1991480/ and let it set, that should bond together some of the loose windings.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote cools Quote  Post ReplyReply Direct Link To This Post Posted: 16 Jul 2019 at 10:48pm
I used a wooden spoon to poke about and debug and a chopped up pencil eraser to wedge on the buzzy Cute yoke I used to have.

https://forum.arcadeotaku.com/viewtopic.php?f=4&t=21983&hilit=Yoke+buzz
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gozaimas View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gozaimas Quote  Post ReplyReply Direct Link To This Post Posted: 16 Jul 2019 at 11:31pm
thanks for the tips everyone. 

 yes, it's a MiniCute. didn't realise they were so notorious for this. will try the cable tie + eraser solution that people over at AO recommend.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gozaimas Quote  Post ReplyReply Direct Link To This Post Posted: 19 Jul 2019 at 4:46pm
Quick update on this, in case anyone searches the topic in the future: I simply placed two plastic cable ties around the large white plastic surround where the yoke connects to the back of the screen. I pulled these tight and it's almost completely eliminated all buzz, so I am extremely happy with a solution that cost about 50 pence. Thanks for the pointers.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Hurray Banana Quote  Post ReplyReply Direct Link To This Post Posted: 19 Jul 2019 at 9:44pm
Great fixing
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Monstermug Quote  Post ReplyReply Direct Link To This Post Posted: 19 Jul 2019 at 9:50pm
which way around did you tie the cable? got any pics?
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