Observed immediately after unloading power light put out that the downtime uninstall belongs to protect downtime fault phenomenon. To connect the power switch, power indicator, press the operation key can enter the corresponding working condition, but found that press fast forward or rewind button with volume drive slowly, and mechanical friction sound, then reel stop running, with hand pressure belt cover reel and immediately turn, shows that fault exists in the warehouse in the locking mechanism. Unloaded belt cover, pop-up box inspection, found that linked with storehouse already deformation, thus resulting in decreased with warehouse after lock, with warehouse under the action of spring stretch upwards not completely fall in place, then this failure phenomenon. Disassemble the machine left and right sides chassis, with warehouse with a pointed mouth QianXiu discharged after the whole link to pack good, insert the belt box volume mechanical friction sound disappears, shooting or replay back to normal.MSuservice manual download site