Open the chassis, loaded tape in camera and video reproduction state observation load is normal. Normal immediately after loading half drum rotation, but now turn drum has not, so appear immediately uninstall, electricity derived from the protection of the state. Drum does not turn, the drum drive signal presented a depends on the CPU is there, second, we must check the drum drive part is normal. After inspection found when press down like a key, press the drum core components on the back of the 27 platooninsert, found that the drum immediately began to turn, video reproduction is normal. Insert row clean, and to put a layer of transparent sticky tape on the back of the paper, to reconnect, commissioning all normal.q4Nservice manual download site