Nikon SB-400 Instruction Manual page 36

Take trial shots
Take test photos before photographing important events, such as
weddings and graduations.
Have Nikon regularly spot-check your Speedlight
Nikon recommends that you have your Speedlight serviced by an En
authorized dealer or service center at least once every two years.
Life-long learning
As part of Nikon's "Life-long learning" commitment to ongoing product
support and education, continually updated information is available online
at the following sites:
• For users in the U.S.A.: http://www.nikonusa.com/
• For users in Europe and Africa: http://www.europe-nikon.com/support/
• For users in Asia, Oceania and the Middle East: http://www.nikon-asia.com/
Visit these sites to keep up-to-date with the latest product information,
tips, answers to frequently asked questions, and to receive general advice
on digital imaging and photography. Additional information may be
available from the Nikon representative in your area. See the URL below
for contact information:
http://nikonimaging.com/
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