Docomo Arrows X F-10D Instruction Manual page 150

Others
When performing fingerprint authentication or
registering fingerprints, "Swipe was too short" or
"Swipe was too slow", etc. appears without
touching the fingerprint sensor.
Possible cause is that the surface of the fingerprint
sensor is wet or condensed of moisture. Wipe water
off with a soft cloth before use.
Screen display turns off when using the fingerprint
sensor
The terminal goes into sleep mode by pressing the
fingerprint sensor. Slide your finger over the
fingerprint sensor not pressing the sensor.
Display flickers.
If [Automatic brightness] of the screen brightness
setting is marked, display backlight automatically
changes according to the ambient brightness. The
screen may seem to be flickering then. P72
There are dots which are always or never lit on the
screen.
Display is manufactured by taking advantage of highly
advanced technology but some dots may be always or
never lit. Note that, this shows characteristics of liquid
crystal displays and not defects in the terminals.
The display has afterimages.
•
If the battery pack is removed from the terminal
before the terminal power is turned OFF,
afterimages may remain. Attach/Remove the
battery pack after turning OFF the power.
•
If the same screen is displayed for a while,
afterimages of that screen may remain even after
changing the screen for a certain operation.
Fingerprint authentication is unavailable when
connecting terminal with a PC, etc.
When connecting the terminal using a USB cable to a
device which requires grounding such as a desktop
PC, make sure that the device is grounded in advance.
If the connected device is not grounded, fingerprint
authentication may be unavailable. In this case,
perform fingerprint authentication while touching a
metallic part (frame, external connector, etc.) of the
connected device or after disconnecting the terminal
from the device.
Data saved in the USB mass storage are not
displayed
Remove and then attach the USB mass storage again.
No sound comes out.
If the stereo earphone plug is removed from the
earphone jack while watching 1Seg or playing
contents in Media Player, playing is paused or muted.
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