D . lf the productdoes not operatenormallywhenthe operating instructionsarefollowed. Adjustonlythosecontrolsthatare coveredby the operatinginstructionssince improperadjustmentof othercontrolsmay resultin damageand will oftenrequireextensive work by a qualifiedtechnicianto restorethe productto normal operation.

E . lf the producthas beendroppedor the cabinethasbeendamaged.

F . lf the productexhibitsa distinctchangein performance,indicating needfor service.

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Canon B75 manual