Engine Control System; Main Controller; General Description - Canon LBP3250 Series Service Manual

Chapter 2

2.7 ENGINE CONTROL SYSTEM

2.7.1 Main Controller

2.7.1.1 General description

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Main controller receives the print information from the external devices (computer etc.) through the interface cable.
Print information is divided into 2 types such as CAPT command data to handle the printer status or specific data and the dot data to printout.
After the main controller receives the dot data, it creates the video data and send it to the engine controller.
CAPT command data is the data to monitor the printer status from the external device using interface.
When this data arrives, the main controller communicates with the engine controller and sends the printer status to the external devices.
External device
CAPT command data/dot data
USB interface
ASIC
DRAM EEPROM CPU
Video interface

Main controller

Video command data/Command status data
Engine controller
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