First check the video is good, then into the camera, to observe the normal load, when the playback button protection machine enough, but fast forward and fast return to normal. Look carefully, fast forward and fast rewind drum rotation, when the video reproduction and video, the drum rotating speed gradually slow down, the last outage protection. Remove the tape, with the hand gently rotating drum, feel have certain resistance. Doubt is produced by a foreign body between the drum and the drum on the friction drum speed slow cause automatic protection. Remove the drum after using alcohol to erase clean, after being alcohol evaporates to pack it back to the commissioning, troubleshooting.5Qmservice manual download site