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Main => Monitor/Video Forum => Topic started by: RayB on March 11, 2008, 04:46:05 pm

Title: Is Flyback hum / buzz normal?
Post by: RayB on March 11, 2008, 04:46:05 pm

There's a noticable hum / light buzz coming from the flyback. (WG 13K4700 mounted in a Taito style cocktail).

I'm only concerned because it seems a little louder than monitor noise should be. But otherwise monitor works like normal more or less (very subtle slight "waving" of the picture, but thats it).

Title: Re: Is Flyback hum / buzz normal?
Post by: qrz on March 11, 2008, 10:05:37 pm

may have some weak caps in vreg or on any of the fly's secondaries.
i trust u don't detect a wiff of ozone  ?. ( would indicate corona/arcing )


qrz

Title: Re: Is Flyback hum / buzz normal?
Post by: RayB on March 12, 2008, 06:58:12 pm

No. No odors, no pops or snapping sounds.

Title: Re: Is Flyback hum / buzz normal?
Post by: northerngames on March 12, 2008, 09:09:12 pm

turn the screen volts down on the flyback and raise the brightness on the chassis perhaps.

also when it is up to high you will start to get lines.

Title: Re: Is Flyback hum / buzz normal?
Post by: XYXZYZ on March 17, 2008, 10:59:29 pm

I had a Neo Geo machine with a loud buzz coming from the isolation transformer. Turned out to be a little piece of the film winding was sticking out and vibrating against the metal part. I just cut it off with a hobby knife, fixed everything. But being that yours is a flyback unit, I doubt you'll be able to get in there...

Title: Re: Is Flyback hum / buzz normal?
Post by: RayB on March 27, 2008, 01:24:25 pm

Well it's not my problem anymore.   ;D