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Avoid physical shocks
Do not drop the SB-28 or hit it against a hard surface as this may damage
its precision mechanisms.
Never disassemble the SB-28
Never attempt to disassemble or repair the SB-28 yourself. The SB-28
contains high-voltage circuitry which can cause electric shock.
Keep the SB-28 away from water
The SB-28 is not waterproof and therefore should not be exposed to rain or
saltwater. If water gets inside the SB-28, corrosion may occur, resulting in
high repair costs.
Cleaning
Use a blower brush to remove dirt and dust from the SB-28 and clean it
with a soft, clean cloth. Never use commercial cleaners containing thinner,
benzene, or alcohol as they could damage its plastic parts.
Maintenance
When storing the SB-28 for two weeks or longer, remove the batteries to
prevent battery leakage. Also once a month, insert fresh batteries and fire
the unit several times to reform its capacitor and keep the SB-28 in top
working order.
Storage
Store the SB-28 in a cool, dry place to prevent mold and mildew. Also keep
it away from chemicals such as camphor or naphthalene. Avoid exposing
the SB-28 to magnetic waves from TVs or radios and never store it the
truck or glove compartment of a vehicle during the summer.
Tips on Speedlight care