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8-2 Button Replacement
If a watch has been dropped or bumped on hard object, a button may be damaged or a button shaft
may become bent by the impact.
If this happens, it is necessary to replace the button since it may no longer operate or water may enter
through the space around the button resulting in defective water resistance.
In addition, since buttons will no longer be able to be depressed if dust or other dirt becomes trapped
in the button holes of the case, it is necessary to remove the buttons from case and remove the dust
or dirt.
The buttons are fastened to the case with E-rings.
The procedure for removing and installing buttons is indicated below.
Tool used
1) Remove the cover/back of the watch and take
out the module.
2) Insert a precision screw driver (minus) into the
gap between the E-ring and the button shaft
in the case, and push the E-ring off the button
shaft. Be careful not to apply excessive force
with the screwdriver or the E-ring may pop out
of the case and become lost. (Fig. 8-3)
3) Remove the button from the case and replace
it with a new one.
Apply silicon grease to the packing/O-ring attached to the button shaft at this time to ensure proper
water resistance and smooth button operation.
4) Attach the button to the case.
5) Install the E-ring on the button shaft and fasten the button to the case.
Align the groove of the button shaft for the E-ring at the same position on the side of the inside of
the case, and place the E-ring at that location.
Then, using a minus screwdriver, push gently on the E-ring from above so that it catches on the
shaft.
If the E-ring has been spread apart so that it does not catch on the button shaft, either replace it
with a new one or press it together so that it catches on the shaft.
6) Attach the module and cover/back.
7) In the case of water-resistant watches, always make sure to perform the waterproof inspec-
tion after repair is completed.
NO.
Code No.
Tool name
1
1904 5153 HP-fingerstall (two set)
2
1901 9672 Precision screwdriver set
3
1904 1659 Silicone grease
E-ring
Precision screw driver (–)
Fig. 8-3