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Woodbob · Jul 26, 2009, 05:14 AM

Hi,

I was given an old Nutone 4 Chime that has stopped working - just a low hum and slight movement of the coils.

There is NO model number on the chime, only the Nutone name.

Does anyone have any information on this chime? Looking for a wiring diagram and or parts list.

This model has a motor that rotates a pin that makes the contacts that go to the coil chimes.

I have cleaned the coils and contacts and have gotten a little movement from the coils.

Yes, I have written to Nutone but...

Here's a couple of pictures.

Thanks

Stratmando · Jul 26, 2009, 07:03 AM

What does it say in top corner(Model#?).
I would see what the voltage on motor is. Maybe 120 volts? Then the coils would likely be 120 volts as well, looks like it plays 8 0r 9 notes or there is a pause, can't see under the arm. I see 4 terminals, 2 are likely power and 2 are likely doorbell button, maybe a pull switch on side for on/off.

Woodbob · Jul 26, 2009, 07:35 AM

Hello,

The label you ask about only says "Nutone - Cin. Ohio", NO model number. This is a 16 volt chime, at least that's what I measured from the transformer in the house it came out of.

I suppose the 16 volts could possibly be a 24 Volt transformer with a problem but I doubt it.

As seen in the picture, there is a small lamp in the front of the chime housing controlled by a switch on the side.

I realize that two of the terminals are for the 16 V xformer and would expect the others to be the Front and Rear bell pushbutton.

I did hook up the 16V and tried it and got the light to light and the coils to move slightly

Thanks

Stratmando · Jul 26, 2009, 07:46 AM

I was thinking 2 for power 2 for button, no rear door? Do each one of those solenoids strike a brass tube(different lengths) as shown?

Check through these, need to scroll down:
http://www.eurekamodern.com/vintage_...ds_service.htm
And
http://www.knockdoorbells.com/services_main.htm
And
http://www.eurekamodern.com/vintage_...ds_history.htm

Woodbob · Jul 26, 2009, 08:09 AM

Hi,

Yes, there are 4 brass tubes with this chime. One is shown in my picture.

Thanks for the links.

I am thinking that the small motor is the heart of the problem.

Thank you

Stratmando · Jul 26, 2009, 08:18 AM

Good Luck, a phone call to one of these links may provide parts and info.

Woodbob · Jul 26, 2009, 08:24 AM

Hi,

I'll need it..

Thanks again

Stratmando · Aug 6, 2009, 04:20 AM

Did you get it going?

Woodbob · Aug 6, 2009, 04:32 AM

Hi,

Yes, I did. After reading the links you sent me I took the solenoids out of the coils and
Buffed them clean.

I also cleaned the inside of the coils when the solenoids were out.

I needed to clean all the contacts etc.

I'll have to build a small housing to hold the "Works" as the previous owner broke the
Case and threw it away.

By the way, I sent the pictures to Nutone ant they tried to help but couldn't identify the unit. They did send me an address of a repair shop near me.

I just got it going yesterday.

Thanks again

Stratmando · Aug 6, 2009, 05:03 AM

Good deal, Does it play 8 notes with a pause in the middle?

Woodbob · Aug 6, 2009, 05:18 AM

Hi,

Yes it does. I did learn NOT to tighten the small set screw too tight that holds the contact
Pointer on the motor arm that turns for the chimes.

When I did tighten the small flat screw driver slot too much, one side broke off!

Luckily, I found a 6/32 hex in "Ace" hardware yesterday that worked. I first thought
I would have to re-tap the small pointer to get one to fit and I didn't like that idea.

Thanks

Stratmando · Aug 6, 2009, 05:21 AM

Good deal.

Woodbob · Aug 6, 2009, 05:28 AM

Hi,

By the way, one other problem I had was it didn't want to play all 8 notes, it would

Skip two of them at times. However, if I shorted the contacts with a jumper wire

All notes played fine, thus I knew it wasn't the coils or solenoids.

I removed the pointer contact arm (center of front picture) and cleaned it again.

I noticed that the contact part has a small bump on it that contacts the circular stationary

Contacts as it is rotated.

This "Bump" had a worn spot on it that I think didn't make a good contact.

I cleaned the bump, again and dropped a small amount of solder on the bump and now it

Plays fine.

This all happened yesterday!

Thanks

Stratmando · Aug 6, 2009, 05:29 AM

What tune does it play?

Woodbob · Aug 6, 2009, 05:31 AM

Good question? I'll have to LISTEN!!

Going to the Doctor, back later

Stratmando · Aug 6, 2009, 05:32 AM

Good Luck. Take Care

depst8 · Feb 6, 2011, 11:43 AM

There's a couple of other sources:

This guy is mostly into clocks, but many Nutone and other old chimes used the same Telechron motors and coils:
http://www.atmos-man.com/rotor.html

Here's another guy that repairs Telechron motors:
http://www.allgoodtime.com/rotor.html