Hi All,
I've had some success fixing a multi cassette deck by pioneer which had an audio noise like a grounding issue when the tape transport mechanism frame isn't properly grounded to the main chasis. After running a spare wire from the tape transport frame to the main chassis of the unit, the spurious noise stopped and the music could be heard without ticking or buzzing.
I noticed that the unit had a grounding wire that went from the tape transport frame to a spot that went in behind the main display.
After removing the front panel , I could see that the black wire was screwed onto a plate that holds in the colour filter(blue or yellow) that creates the display hue associated with these 90s units.
Now perhaps this was intended to be a grounding strap to reduce dust collection on the filter, but I was wondering if the connection is actually a misplaced earth that should have gone to the main chassis , thus removing the audio buzzing/ticking.
The 'free' end of the wire in the picture was connected to the tape transport mechanism frame. It is the connected end that I'm asking about.
I've had some success fixing a multi cassette deck by pioneer which had an audio noise like a grounding issue when the tape transport mechanism frame isn't properly grounded to the main chasis. After running a spare wire from the tape transport frame to the main chassis of the unit, the spurious noise stopped and the music could be heard without ticking or buzzing.
I noticed that the unit had a grounding wire that went from the tape transport frame to a spot that went in behind the main display.
After removing the front panel , I could see that the black wire was screwed onto a plate that holds in the colour filter(blue or yellow) that creates the display hue associated with these 90s units.
Now perhaps this was intended to be a grounding strap to reduce dust collection on the filter, but I was wondering if the connection is actually a misplaced earth that should have gone to the main chassis , thus removing the audio buzzing/ticking.
The 'free' end of the wire in the picture was connected to the tape transport mechanism frame. It is the connected end that I'm asking about.
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The display radiates crap. It would be reasonable to have a crap-drain from a conductive cover.
However that "looks" like it just goes to plastic? Does the plastic have a conductive coating? (Use ohmmeter.)
In any case, if the transport needs a crap drain to chassis, put a wire on it. Wire is cheap.
I suspect you are not the first one in here. Or else, it was a bad day at the factory.
However that "looks" like it just goes to plastic? Does the plastic have a conductive coating? (Use ohmmeter.)
In any case, if the transport needs a crap drain to chassis, put a wire on it. Wire is cheap.
I suspect you are not the first one in here. Or else, it was a bad day at the factory.
wow that was fast, thanks.
I tested the conductivity, given it appeared to be going to plastic and found that the two screws 40mm apart are showing continuity, thus the plate that they hold down must be conductive. This made me think that the earth wire was to stop any build up of static charge thus attracting dust on the plastic filter.
Knowing the sort of display in the other photo, would you think the black wire was mean't to somehow ground the filter or even the display, what is this crap you speak of. I thought I'd ask before I put the ground where it should be. You're right wire is cheap, but I'd like to use eyelets and do the ground more solidly.
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