D . lf the product does not operate normally when the operating
instructions are followed. Adjust only those controls that are
covered by the operating instructions since improper adjustment of
other controls may result in damage and will often require extensive
work by a qualified technician to restore the product to normal
operation.
lf the product has been dropped or the cabinet has been damaged.
lf the product exhibits a distinct change in performance, indicating a
need for service.
E .
F .