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I purchased the unit from a private party and the original owners manual was not available. Having the ability to download it was extremely helpful and clarified operating the equipment immensely. This is a complicated unit and without the manual I would not have been able to maximize it's potential. Thank you.
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Being a user of older radios of many kinds, preferring them over more modern rigs, this manual was invaluable in the programming of my two. I now know for certain what the assorted buttons functions are, and am very grateful to have found this excellent site. Many thanks for your assistance, Tony.
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Clear and easy to read. All details as expected. Price acceptable , and quick delivery.
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Quick response and exactly what I was looking for and at a great fair price!
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5 star quality on these downloadable manuals. Easy to read and all the information is there. A must when doing a custom install or needing to service your precious old school electronics.
3. Slide the battery switch to the �REPLACE 1� setting. Insert a thin, pointed object into (A) and remove the old battery.
(A)
Caution Be sure to remove only one battery at a time. Otherwise, you will lose all data stored in memory. 4. Replace the old battery with a new one, making sure that the positive (+) side of the new battery is facing up (so you can see it). 5. Slide the battery switch to the �REPLACE 2� setting and repeat step 4 for the other battery. � Be sure to load two new CR2032 batteries at the same time . Never mix an old battery with a new one. 6. Slide the battery switch to the �LOCK� setting. 7. Replace the battery compartment cover.
Battery Precautions
� Keep + side of each battery facing up (so you can see it). � Keep batteries out of the reach of small children. If swallowed, consult with a physician immediately. The batteries that come with this unit discharge slightly during shipment and storage. Because of this, they may require replacement sooner than the normal expected battery life.
E-24
 $4.99 SF-3990 CASIO
User Guide It's a complete guide ( also known as operating manual or owner's manual), and it's in PDF format. A…
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