D. If the product does not operate normally as defined by the operating instructions. Adjust only those controls that are covered by the operating instructions, as an impro- per adjustment of other controls may result in damage and will often require extensive work by a qualified technician to restore the product to it’s normal operation.
E. If the product has been dropped or damaged in any way.
F. When the product exhibits a significant change in performance this indicates a need or service.
21.Replacement Parts – When replacement parts are required, be sure the ser- vice technician has used replacement parts specified by the manufacturer or that have the same characteristics as the original part. Unauthorized substitutions may result in fire, electric shock or other hazards.
22.Safety check – Upon completion of any service or repairs to this product, ask the service technician to perform safety checks to determine that the product is in pro- per operating condition.
23.Mounting – The product should be mounted only as specified in this manual.
24.Heat – The product should be situated away from heat sources such as radiators, heating vents, stoves, or other products (including amplifiers) that produce heat.
48