Casio PRT-40C Repair Manual page 35

14)Place the watch with cover/back side down on heated hot plate for 10 minutes.
Note1: Set the temperature of the hot plate approx. 60
Note2: In case the hot plate HM-11 which is delivered by CASIO is used, place the silicone rubber
with thermo tape for the prevention of excessive heating to the watch.
15)After 10 minutes have passed, take the watch from the hot plate, and place the watch with glass
side down on the wet cloth for one minute.
16)One minute later, take the watch and wipe the water on the watch glass, and check whether the
condensed water is under the glass or not.
In case the condensed water is not appeared
The watch is watertight, and water resistant checking is finished.
In case the condensed water is appeared
Replace the case/center ass'y with new one. And make the water resistant checking from the first
step.
Watch pressure
Valve screw
Cap
Closing rod
Silicone rubber
°
C.
Pressure gauge
Hot plate
— 31 —
Pressure giving
Watch setting