Eta 980.153 Service Walkthrough - The Elegant Movement

[Lawson]

ETA 980.153 Service Walkthrough

 

The ETA 980 Caliber is used mostly in ladies high-end quartz watches.
The iteration for this walkthrough is the 980.153, which has the seconds subdial.

ETA 980.153 - Technical Communication.PDF
I thought this one would interest many of you, as it has a primary and secondary train bridge.

 

 

Once the Hands are removed, turn the movement over and turn the fastening screws for the Dial Feet (circled in orange) until the flats are towards the feet.  This will allow you to easily remove the Dial.

 

 

Once the Dial is removed, you can take off the Hour Wheel.

 

 

This is the only item to be removed from the dialside of the movement.

 

 

Place your movement in the holder and unscrew the two screws holding the Circuit.
Note they are two different lengths.

 

 

Remove the Circuit and Battery Contacts and place the Circuit immediately somewhere safe.

 

 

Next remove the three screws on the primary Train Bridge, and remove the bridge.
Here are some reference shots of the primary train.

 

 

Once the wheels are removed, you'll be able to see the Canon Pinion.
DO NOT try and remove it at this stage!

 

 

As you can see, it's slightly under the wheels in the secondary train for the seconds sub-dial.  This will have to be removed before extracting the Canon Pinion.

 

 

Before we get to removing the secondary train we must first remove the Coil.
Remove the Coil Protector, then carefully lift out the Coil along with the Stator.

 

 

Next remove the secondary train bridge.
This is held in place with a single screw and two locating pins.  The locating pins can be a little tight fitting, so very gently rock the bridge and work it slowly off these pins to avoid breaking a pivot or jewel.
Now you can remove the two wheels under this bridge and the Canon Pinion.

 

 

On to the plastic housing that the Swiss lovely refer to as the "Electronic Module Distance Piece" ... yeah, whatever! :rolleyes:

Make sure the crown is pushed in, and NOT in the hand setting position, then undo the single screw and lift out the "Black Chuck of Plastic Module Thingie" :P

 

 

Once this is removed, you can get to the Keyless Work and the Minute Wheel.

 

 

You can then pull the Yoke, Sliding Pinion, Setting Lever and Stem out for cleaning.

 

 

 

The disassembly is complete.

 

 

After cleaning assembly is just the reverse operation.

Here are some reference photos to help you along...

 

 

I hope this has been an interesting walkthrough, and helps those wishing to tackle this wonderful little movement jam packed with wheels and bridges :)

 

 

[Geo]

That's a quality wee movent Lawson, and an excellent write up as usual. :)

[WillFly]

Excellent post - and it certainly increases my respect for good quartz movements!

[clockboy]

Great post & great quartz movement 

[bobm12]

Great walkthrough Lawson, but what else is news my friend! Thank you for posting...boy, that's a tiny movement!

 

Cheers,

 

Bob