Sony RDR-VX555 Service Manual page 6

6) Product Safety Notice-Some electrical and mechanical parts
have special safety-related characteristics which are often not
evident from visual inspection, nor can the protection they give
necessarily be obtained by replacing them with components rated
for higher voltage, wattage, etc. Parts that have special safety
characteristics are identified by shading, an ( ) or a ( ) on
schematics and parts lists. Use of a substitute replacement that
does not have the same safety characteristics as the
recommended replacement part might create shock, fire and/or
other hazards. Product safety is under review continuously and
new instructions are issued whenever appropriate.
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