Patent ID: 8817293

Claim:
An image forming apparatus, comprising: at least one cover unit to be mounted in the image forming apparatus; at least one replaceable unit to participate in an image forming operation of the image forming apparatus, wherein each replaceable unit comprises a replaceable unit monitoring unit (RUM) to manage the state of the replaceable unit; a sensing unit to sense whether the at least one cover unit is opened or closed; a shock-absorbing unit to lessen an impact occurring when the at least one cover unit is opened or closed; and a main board unit to withhold a power supply from the at least one replaceable unit for a predetermined period of time starting at a time at which the at least one cover unit is closed, the predetermined period of time of a duration to ensure that the at least one cover unit is shock-absorbed by the shock-absorbing unit, wherein the main board unit is connected to the RUM in the at least one replaceable unit via a signal line and a power line.