Hitachi 27AX4B, 27AX3B, 27AX0B Operating Manual page 10

IMPORTANT SAFEGUARDS
IF THIS SET DOES NOT OPERATE PROPERLY
22 If you are unable to restore normal operation by following the detailed procedure in
your operating instructions, do not attempt any further adjustment. Unplug the set and
call your dealer or service technician.
23 Whenever the television set is damaged or fails, or a distinct change in performance
indicates a need for service, unplug the set and have it checked by a professional
service technician.
24 It is normal for some TV sets to make occasional snapping or popping sounds,
particularly when being turned on or off. If the snapping or popping is continuous or
frequent, unplug the set and consult your dealer or service technician.
FOR SERVICING AND MODIFICATION
25 Do not use attachments not recommended by the television set manufacturer as
they may cause hazards.
26 When replacement parts are required, be sure the service technician has used
replacement parts specified by the manufacturer that have the same characteristics as
the original part. Unauthorized substitutions may result in fire, electric shock, or other
hazards.
27 Upon completion of any service or repairs to the television set, ask the service
technician to perform routine safety checks to determine that the television is in safe
operating condition.