HP P1006 Service Guide - Page 40
Timing
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Timing Sequence of operation Operation sequences are controlled by the microprocessor on the DC controller. Table 3-1 Sequence of operation on page 28 describes engine operations for each period of a print operation. Table 3-1 Sequence of operation Name Timing Purpose WAIT From power-on until the end of the main motor initial Detects presence of a print cartridge. Clears potential drive from the drum surface and cleans the transfer roller. STBY (standby) From the end of the WAIT or LSTR period until either Prepares the printer to receive print commands a print command is sent from the formatter or the power is turned off. INTR (initial rotation) From the time of the print command until the pickup Prepares the photosensitive drum for printing. solenoid is turned on. PRINT From the end of the INTR period until the last page 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 until the main motor stops rotating. Delivers the last page of a print job. After LSTR, the printer either returns to STBY or, if another print command was sent from the formatter, enters INTR. 28 Chapter 3 Theory of operation ENWW