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 Post subject: ZENITH CHASSIS 18YT20 - Broken Tone Arm
PostPosted: Apr Wed 08, 2020 9:25 pm 
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Joined: Apr Wed 08, 2020 9:17 pm
Posts: 5
First time posting so I will try to be as detailed as I can. However, I have no experience in repairing radios so please be patient lol

The tone arm does not work on my turn table. It won't land at the "beginning" of the records when I turn it on and once it lands, it drags across the record. What I'm trying to do is remove the entire table from the cabinet so I can clean it and try to figure out the source of the problem. What my issue is is I'm not sure where to unplug the power supply. I have unplugged the motor, but the power supply seems pretty locked in both to the turn table and also to the circuit board itself. Do I disconnect from beneath the turn table or from the circuit board?

Another thing is once I get the table out, I'm not sure what the source of the problem is as far as why the tone arm isn't working. If someone could point me in the right direction, that would be fantastic. Thanks in advance!


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 Post subject: Re: ZENITH CHASSIS 18YT20 - Broken Tone Arm
PostPosted: Apr Wed 08, 2020 10:32 pm 
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Joined: Jan Wed 16, 2013 12:04 am
Posts: 1787
Location: 77001
Welcome to the Phono Forum.

Please post some good photos
of the record changer.

Then we'll know what we're working with.

Thanks,
Hotwax


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 Post subject: Re: ZENITH CHASSIS 18YT20 - Broken Tone Arm
PostPosted: Apr Wed 08, 2020 10:41 pm 
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Joined: Apr Wed 08, 2020 9:17 pm
Posts: 5
Here we are! I hope this is helpful


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 Post subject: Re: ZENITH CHASSIS 18YT20 - Broken Tone Arm
PostPosted: Apr Wed 08, 2020 11:59 pm 
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Joined: Jan Wed 16, 2013 12:04 am
Posts: 1787
Location: 77001
Thanks for the great photos.
Your record changer is a Voice of Music-made
product branded for Zenith. Model # will be
under the changer base when you get it removed.

1. Yes, unplug the AC motor supply from the
bottom molded plug under the record changer.
You can gently rock the molded plug side to side
while exerting a downward pull on the plug.
They can be quite tightly inserted.

2. Then, unplug the two stereo channel leads
from the record changer.

2.a. When the above is completed, there will be
two retaining clips that can be flipped to the "up"
position, so that the changer can be removed from
its mounting board, called a plinth.

One of the clips is visible in the photo of the underneath
of the changer.
If need be, someone can press down
on the changer base from above, so that the changer
base springs are compressed, and the clip will clear
the mounting hole in the plinth when flipped to up position.

3. There may be one or multiple problems causing
the tonearm to skate.

3.a. Two common problems are a damaged stylus
in the phono cartridge or the tonearm cartridge mass
is too light.

In addition, you have the nice Zenith 2 gram tonearm
cartridge set-up, so there may be some problems
with the actual cartridge mount itself. The design is a bit
different than the usual vintage phono cartridges
of that 1960's era.

Also, make sure the stylus selector is for LP/Stereo and
not 78. The knob on top of the tonearm can be pressed
down and rotated to select one of two styli that are mounted
on one bar.

4. Let's get the changer out, then we'll proceed with some
more photos and some solutions.
Best,
Hotwax


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 Post subject: Re: ZENITH CHASSIS 18YT20 - Broken Tone Arm
PostPosted: Apr Thu 09, 2020 3:31 pm 
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Joined: Apr Wed 08, 2020 9:17 pm
Posts: 5
So far so good! I’m going to start by cleaning with q-tips to see if that’ll help, but I think you’re on to something with the tone arm mass being too light. It has absolutely no weight to it which makes me think this is why the arm drags across the record.

Thank you so much for helping me. This is a great quarantine project. Let me know if you need more photos!!

Hannah.


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 Post subject: Re: ZENITH CHASSIS 18YT20 - Broken Tone Arm
PostPosted: Apr Thu 09, 2020 4:54 pm 
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Joined: Apr Wed 08, 2020 9:17 pm
Posts: 5
New development: I tried changing the stylus back and forth from LP to 78 and it the tone arm doesn't drag at all when set to 78. It does skip a little bit here and there, but absolutely nothing like the way it drags when turned to LP.


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 Post subject: Re: ZENITH CHASSIS 18YT20 - Broken Tone Arm
PostPosted: Apr Fri 10, 2020 4:43 pm 
Member

Joined: Jan Wed 16, 2013 12:04 am
Posts: 1787
Location: 77001
hannahgouldrick wrote:
New development: I tried changing the stylus back and forth from LP to 78 and it the tone arm doesn't drag at all when set to 78. It does skip a little bit here and there, but absolutely nothing like the way it drags when turned to LP.

1. That behavior points to a possible bad stereo stylus.
If you don't have a new stylus in there, I would buy one.

Stylus available from Gary at thevoiceofmusic.com

2. Please post photos of the tonearm underside.
Closeup of the phono cartridge from different angles.

3. Since this is the 2 gram tonearm set up, the arm will
be light to the touch.

I know where tonearm mass adjustment screw is, but cannot
remember exactly how the set up is effected.
Will return to that later.

Hotwax


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 Post subject: Re: ZENITH CHASSIS 18YT20 - Broken Tone Arm
PostPosted: Apr Fri 10, 2020 5:34 pm 
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Joined: Apr Wed 08, 2020 9:17 pm
Posts: 5
Hotwax wrote:
hannahgouldrick wrote:
New development: I tried changing the stylus back and forth from LP to 78 and it the tone arm doesn't drag at all when set to 78. It does skip a little bit here and there, but absolutely nothing like the way it drags when turned to LP.

1. That behavior points to a possible bad stereo stylus.
If you don't have a new stylus in there, I would buy one.

Stylus available from Gary at thevoiceofmusic.com

2. Please post photos of the tonearm underside.
Closeup of the phono cartridge from different angles.

3. Since this is the 2 gram tonearm set up, the arm will
be light to the touch.

I know where tonearm mass adjustment screw is, but cannot
remember exactly how the set up is effected.
Will return to that later.

Hotwax


Here are the photos


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 Post subject: Re: ZENITH CHASSIS 18YT20 - Broken Tone Arm
PostPosted: Apr Mon 13, 2020 4:15 pm 
Member

Joined: Jan Wed 16, 2013 12:04 am
Posts: 1787
Location: 77001
The cartridge set-up looks OK.

I would order a new stylus as the next step.

Below are some links to what I believe is your
stylus and cartridge.

Contact the Voice of Music, give Gary
the V-M made record changer number,
to confirm which stylus to buy.

V-M # on the paper tag: "857 6819 1297 ( D23 or 023 ) "
I can't tell if a D or a Zero.


The other number, 169 352 is the Zenith model number.

Edit: I also found a possible source for Zenith Changer Service Folder.
Info unique to this Zenith branded V-M.
http://www.winnfreenet.com/shop/Zenith_ ... ag=169-352

https://thevoiceofmusic.com/catalog/par ... ategories=

https://thevoiceofmusic.com/catalog/par ... ategories=


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