4, next, everybody must experiment the power source of projector on the spot when buy, because norms of power source of projector of commodities from abnormal channel reachs compatibility to be able to have apparent difference, can affect the stability that uses to the product badly. When be being bought so, the working voltage that finds out projector must go up to undertake checking in the manual of projector.
5, manufacturer can pass deputize business to undertake in Chinese market projector is sold, when buying projector, can undertake affirming to the domestic company of projector manufacturer or agency, clear whether the formal representative channel of manufacturer accredit.
Because the country treats projector of commodities from abnormal channel, did not make strict checkup measure, specific without the regulation also administration executes the law the branch will undertake superintendency to its, this also is the reason that projector of commodities from abnormal channel can overrun in projector market, damage to consumer very big. Combine the introduction above so, when consumer is buying projector must sharpen one's eyes, and want an attention obtain from normal channel, in buying a process need checks seriously all manuals, guarantee of quality, make sure the service can have Zhang Ke follow, assure to leave commodities from abnormal channel and defective goods formerly, on the investment that is oneself multiple insurance.