HP — Operation sequence

Table 1-1 Operation sequence Period Duration Purpose WAIT period From the time the power switch is turned on, the door is closed or product exits Sleep mode until the product is ready for a print operation. Brings the product to the Ready state.

● Detects the failure of the low-voltage power supply ● Detects the connection with the accessories ● Detects the presence of cartridge ● Rotates and then stops each motor and fan ● Checks the fuser temperature ● Heats the fuser film ● Detects any residual paper and clears it automatically ● Initializes the high-voltage bias ● Cleans the photosensitive drum ● Detects the toner level STBY (Standby period) From the end of WAIT or LSTR period until either a print command is sent or the power switch is turned off. Maintains the product in printable condition.

● Enters Sleep mode if the sleep command is received INTR (Initial rotation) From the time the print command is received until the product picks up the paper. ● Rotates and then stops each fan Prepares the product for a print job. ● Rotate the motors ● Rotate the fans ● Outputs the high-voltage bias ● Starts up the laser scanner assembly ● Warms up the fuser heater PRINT From the end of the INTR period until the last sheet is delivered. Processes the print job. ● Forms the image on the photosensitive drum ● Transfers toner to the paper ● Fuses the toner image onto the paper LSTR (Last rotation) From the end of the PRINT period until the motor stops rotating. Stops each load.

● Stops the motors and fans ● Stops the high-voltage bias ● Stops the laser scanner assembly ● Stops the fuser heater The product enters the INTR period as the LSTR period is complete if the formatter sends another print command. ENWW Basic operation 3