HP LaserJet P2050 Service Manual - Page 95

Timing Sequence of operation The microprocessor on the DC controller controls the product operation sequences. Table 5-1 Sequence of operation Name Timing Purpose WAIT From power-on or the door is closed until the end of Detects presence of a print cartridge. the main motor initial drive. STBY (standby) From the end of the WAIT or LSTR period until either Prepares the product to receive print commands a print command is sent from the formatter or the power is turned off. INTR (initial rotation) From the time the print command is received from the Starts each high-voltage biases, the laser scanner, formatter until the fuser reached its targeted and fuser in preparation for printing. temperature. PRINT From the end of the INTR period until the last media Forms the image on the photosensitive drum and completes the fusing operation. transfers the toner image to the media. LSTR (last rotation) From the end of the PRINT period (when high-voltage is turned off) until the main motor stops rotating. Delivers the last page of a print job. After LSTR, the product either returns to STBY or, if another print command was sent from the formatter, enters INTR. ENWW Timing 83