Инструкции Пользователя для Nikon D7500 18-300mm Lens Kit

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If the camera fails to function as expected, check the list of 
common problems below before consulting your retailer or 
Nikon-authorized service representative.
Battery/Display
Troubleshooting
The camera is on but does not respond
: Wait for recording to end. If the 
problem persists, turn the camera off. If the camera does not turn off, 
remove and reinsert the battery or, if you are using an AC adapter, 
disconnect and reconnect the AC adapter. Note that although any data 
currently being recorded will be lost, data that have already been 
recorded will not be affected by removing or disconnecting the power 
source.
Viewfinder is out of focus
: Adjust viewfinder focus (
0 11). If this does not 
correct the problem, select single-servo autofocus (AF-S
0 100), single-
point AF (
0 103), and the center focus point (0 110), and then frame a 
high-contrast subject in the center focus point and press the shutter-
release button halfway to focus the camera. With the camera in focus, 
use the diopter adjustment control to bring the subject into clear focus 
in the viewfinder. If necessary, viewfinder focus can be further adjusted 
using optional corrective lenses (
Viewfinder is dark
: Insert a fully-charged battery (
Displays turn off without warning
: Choose longer delays for Custom Setting 
c2 (Standby timer) or c4 (Monitor off delay
Displays in control panel or viewfinder are unresponsive and dim
: The response 
times and brightness of these displays vary with temperature.
The viewfinder display turns red when a focus point is highlighted
: This is normal 
for this type of viewfinder and does not indicate a malfunction.