Can this machine boot into the DV belt, normal load, but after a few seconds machine power light flashing alarm, LCD display shows FO5 fault code, then shutdown protection, bootable again after the fault is still, but it can be out of the warehouse and unloading. Analyze maintenance: circuit as shown. The machine has self-checking function, can protect themselves when failure occurs, turn it off and presented the corresponding fault code. According to preliminary judgment fault FO5 shows fault code, in the drum and drum servo drive circuit. After open the machine cover parts, plus electric boot into the DV belt, the machine can normal addition, unloading, explain all mechanical parts is normal, but not turning drum. Change after a complete set of drum, the fault is still, that is not the drum itself causes, so focusing on drum servo drive circuit. Measuring IC2201 (21) - (23) foot voltage of 2.1 V, normal; Measurement (15) - (17) normal foot; (13), (14) foot voltage on the low side. Disconnect (13), (14), test the pin voltage is 0.2 V and 2.8 V respectively, IC2201 without damage. And only drive block IC2202 is not normal, can cause IC2201 pin voltage is not normal. With digital multimeter IC2202 each pin voltage measurement and comparison of the normal voltage, found that in addition to (2), (4), (6), (9), (11), (13) and normal foot, other each foot voltage were significantly lower, touch IC2202 felt obvious fever. According to the circuit analysis, can cause IC2202 abnormal external factors are ruled out, only IC2202 itself is damaged, can cause the pin voltage is not normal. After the integrated block change new, can the normal video recording and playback.e7jservice manual download site