Engine control system The engine control system coordinates all product functions and drives the other four systems. The engine control system contains these components:
● DC controller PCA ● High-voltage power supply PCA ● Low-voltage power supply unit ● Fuser control Figure 1-2 Engine control system Table 1-1 Sequence of operation Period Duration Purpose Remarks WAIT period From the time the power is turned on until the initial drive for the main motor is complete Removes the charge that creates a potential difference from the drum surface, and adjusts the drum phase Detects cartridge presence STBY (Standby period) From end of the WAIT or LSTR period until either the print command is received from the formatter or the power is turned off Maintains the product in readiness for a print command and maintains the heater at a targeted temperature INTR (Initial rotation) From the time the print command is received until the pickup solenoid is turned on Prepares the photosensitive drum for printing and cleans the transfer charging roller ENWW Engine control system 3 Formatter Engine-control system DC controller Low-voltage power supply High-voltage power supply Fuser control Laser scanner system Image-formation system Pickup, feed and delivery system Accessory Laser scanner system Accessory