Samsung YP-K5JZBY ユーザーズマニュアル

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Chapter 1. Preparation
Button Functions
11
CAUTION
■   
Do not use any sharp object other than your fingers to operate the touch screen. 
Otherwise, touch screen may be damaged.
■   
Do not tap on the touch screen if your fingers are not clean.
Tap on touch screen with your
fingertip.