Re: Sound hum in Wizard of Wor

Mine had that but I tracked it down to a bad ground as I recall - it was
3 or 4 years ago when I got it... I'm drawing a total blank as to why
I remember it as a bad ground.. But I know I didn't spend more than a
couple of hours tracking it down with a scope.. Its a pain working in
that cabinet..

Kurt

>
> Have you tried another speaker?
>
> Jon
>
> At 02:14 PM 10/16/2000 -0500, Walt wrote:
> >Have a very irritating loud hum coming from the center channel (Wizard's Voice) on my Wizard of Wor upright. I have spoken to several other collector's with the same problem, but others don't have it. So, I am wondering if it might be an early design flaw that was corrected in later production.
> >
> >Anyone have this problem and find a fix? This is what I have tried:
> >
> >Replaced boardset and cage with another known working set
> >Replaced the Power Supply board
> >Replaced ALL the caps on the PS board (reflowed connectors also)
> >Replaced the audio amp board (then replaced all the filter caps on it)
> >Replaced the line filter
> >Unplugged the monitor and the marquee light to see if there was interference
> >Replaced the fuse holder and all fuses
> >Went over every inch of the wiring harness (all grounds in place)
> >
> >Hum is only coming through the center speaker. Other 2 channels are fine. Only way to quiet the hum is to put a capacitor on the speaker leads. This makes the hum quieter, but also makes the Wizard's voice somewhat distorted, so this is not an acceptable fix.
> >
> >Anyone?
> >
> >Thanks,
> >
> >
> >Walt
> ><http://www.enetis.net/~wandk/arcade/arcade.htm>www.enetis.net/~wandk/arcade/arcade.htm
> >
> >
>
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Received on Mon Oct 16 14:31:17 2000