Casio JD-4000 Service Manual page 13

To replace the main battery
1. Switch power off.
2. Loosen the screw that holds the battery compartment cover in place, and then remove the
cover(Fig. 1).
* Do not turn switch on until you complete step 7 of this procedure.
3. Slide the tab in the direction indicated by the arrow (Fig. 2).
4. Insert a thin, pointed non-metallic object into the opening (A) so that the old battery can be re-
moved (Fig. 3).
* Do not slide the tab while battery is not installed!
5. Wipe a new battery with a soft, dry cloth, then install the battery into the unit. Make sure that its
positive (+) side is facing up (so you can see this side).
6. Slide the tab back to the origin.
7. Replace the battery compartment cover and fix it with its screw.
Battery compartment
cover
To replace the back-up battery
1. Switch power off.
2. Loosen the screw that holds the battery compartment
cover in place, and then remove the cover (Fig. 1).
* Do not turn switch on until you complete step 7 of
this procedure.
3. Remove the back-up battery precaution sticker, and
then loosen the screw that holds the back-up battery
cover in place.
4. Remove the back-up battery cover and then remove
the old battery (Fig. 4).
5. Wipe a new battery with a soft, dry cloth, then install
the battery into the unit. Make sure that its positive
(+) side is facing up (so you can see this side).
6. Replace the back-up battery cover and fix it with its
screw. Do not forget to replace the battery precaution
sticker.
7. Replace the battery compartment cover and fix it with
its screw.
Tab
Figure 1
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Main battery Opening (A)
Figure 2
Figure 4
Back-up battery cover
Figure 3
Back-up battery