JVC Black Sapphire SL42B-C User Manual page 4

The lightning flash with arrowhead symbol, within an
equilateral triangle, is intended to alert the user to
the presence of uninsulated dangerous voltage with
the product's enclosure that may be of sufficient
magnitude to constitute a risk of electric shock.
Regulatory Statement
The exclamation point within an equilateral
triangle is intended to alert the user to the
presence of important operating and maintenance
(servicing) instructions
accompanying the appliance.
in the literature