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 Post subject: Cleaning knobs and pots ~ TIPS
PostPosted: Feb Sun 10, 2019 9:55 pm 
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Joined: Jan Tue 29, 2019 8:49 pm
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I am cleaning the knobs on 67 Zenith stereo console and would sure appreciate some tips. I have opening the back panel and need to know where to stay the can with out ruining everything in the area. here is a photo. am not taking it all out because have never touched a stereo before, just want to spay a bit here and there. (Picture is upside down)


Also is there any other areas that could benefit from a squirt while back there?


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 Post subject: Re: Cleaning knobs and pots ~ TIPS
PostPosted: Feb Sun 10, 2019 10:45 pm 
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Location: La Mesa Califonia
With shafts upright a quick shot of deoxit into the control. Bend straw to get into gap to cabon disk. Let dry. Function switches too.


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 Post subject: Re: Cleaning knobs and pots ~ TIPS
PostPosted: Feb Sun 10, 2019 11:41 pm 
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Thanks, so on top of console then could I take knobs off and squirt the cleaner directly down into them with out it ruining anything?


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 Post subject: Re: Cleaning knobs and pots ~ TIPS
PostPosted: Feb Mon 11, 2019 12:20 am 
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NO!

There is a opening on the control where the 3 pins come out and go into the circuit board; you need to spray a little cleaner in those openings.


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 Post subject: Re: Cleaning knobs and pots ~ TIPS
PostPosted: Feb Mon 11, 2019 12:38 am 
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Agree with above. Spraying down the shaft won't do anything. The controls on the far right has a tap on them. That's where the cleaner needs to go. The bend in the straw at the end well let you get behind them and spray one small shot into them. Won't hurt anything doing so. Shafts up as shown. Exercise the controls after you spray each one by tuning the control from end to end a bunch of times. This will spread the cleaner around to cover all of the carbon disk and wipers.


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 Post subject: Re: Cleaning knobs and pots ~ TIPS
PostPosted: Feb Mon 11, 2019 12:41 am 
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Pins? Where might they be located? Are they in the picture above at all?
her


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 Post subject: Re: Cleaning knobs and pots ~ TIPS
PostPosted: Feb Mon 11, 2019 1:01 am 
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Any other areas that might be of importance like speaker area?


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 Post subject: Re: Cleaning knobs and pots ~ TIPS
PostPosted: Feb Mon 11, 2019 1:23 am 
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The slot where the three terminals go into the side of the pot. Be careful not just let go and soak everything in sight. As a protective measure you can stuff in pieces of paper towel or something like that under where you are gonna spray to catch most of any excess. Sometimes the sprays are difficult to control. Looks like the openings in the pots are mostly facing the circuit board, so you got extra difficulty. Hopefully the nozzle is flexible enough to get at it.


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 Post subject: Re: Cleaning knobs and pots ~ TIPS
PostPosted: Feb Mon 11, 2019 2:54 am 
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Thank you! Very helpful, I know it’s hard when going by a picture.


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 Post subject: Re: Cleaning knobs and pots ~ TIPS
PostPosted: Feb Mon 11, 2019 5:41 pm 
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Spray into this opening


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 Post subject: Re: Cleaning knobs and pots ~ TIPS
PostPosted: Feb Mon 11, 2019 7:29 pm 
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Sharrier, it looks difficult on that unit because it is. Just about the hardest to get to there is. You might have to remove the board to get to the right areas.
EDIT: On the other hand the volume control is the most likely to wear and get noisy. I would guess that the volume/loudness control is the one with the extra connections (taps). The taps give you additional holes to try to use cleaner. What I think are the tone controls (bass and treble) are the hardest to get to, you might skip those. Don't worry about areas that are not causing a problem.

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 Post subject: Re: Cleaning knobs and pots ~ TIPS
PostPosted: Feb Tue 12, 2019 5:33 am 
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Hi Sharrier,

Others have given good advice about how to get contact cleaner into these pots. The question now becomes: What type of cleaner should you use?

For high-quality audio gear like yours, I highly recommend that you use CAIG Deoxit F-5 Fader Lube:
https://caig.com/fader-f-series/
This product is designed specifically for conductive plastic faders and controls, like those in your Zenith. It is not cheap, but you get what you pay for. And a single can, used sparingly, can last for several years. Use this product according to the directions on the can, then follow up with a single drop of turbine oil or synthetic motor oil on the point where the shaft enters the pot.

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 Post subject: Re: Cleaning knobs and pots ~ TIPS
PostPosted: Feb Tue 12, 2019 5:57 am 
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There's a way to push the cap of the spray can so it just opens very slightly and a small amount squirts out, not at all like painting with a spray can.

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 Post subject: Re: Cleaning knobs and pots ~ TIPS
PostPosted: Feb Tue 12, 2019 2:11 pm 
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Sometimes when the ideal application point on a control is not accessible you need to get creative.

Use small diameter heat shrink tubing to customize the application straw to direct the cleaner where it needs to go when a regular straw isn't up to the task.

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 Post subject: Re: Cleaning knobs and pots ~ TIPS
PostPosted: Feb Tue 12, 2019 5:12 pm 
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Joined: Jan Tue 29, 2019 8:49 pm
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Where do I get that? that’s just the problem I’m having.


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 Post subject: Re: Cleaning knobs and pots ~ TIPS
PostPosted: Feb Tue 12, 2019 6:53 pm 
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Google 1/16" Heat Shrink Tubing. Several Ebay sellers have it for $2.34 with free shipping, Frys Electronics, Mouser, Parts-Express all have it as well.

https://www.frys.com/product/3221411 1/16th inch heat shrink tubing $1.19


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 Post subject: Re: Cleaning knobs and pots ~ TIPS
PostPosted: Feb Tue 12, 2019 7:20 pm 
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Joined: Jan Tue 29, 2019 8:49 pm
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Ok yes, I see quite a few selling that. Now will that fit on my can of cleaner? I guess this can came with some optimal flexible tip but I must of missed it in the box and thrown it away.


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