Canon imageRUNNER 1019J Service Manual page 29

Chapter 3
the laser unit.
Smoothing
The 600 x 600-dpi image data from the PC is converted into image data equivalent of 1200 x 600 dpi.
Sensor Detection
It detects the state of each sensor of the reader unit and the ADF.
ESS Control
It controls the ESS function used to reduce the power consumption while the machine isin standby state.
Memory Storage
Image data is stored in SDRAM, and is retained for about 1 hr even after the power is removed by the work of
the super capacitor mounted on the modem PCB. The system software and various data (e.g., user data, service
data) are held by flash ROM.
SEND Function (if equipped with SEND functions.)
The SEND function uses a network to send image scanned by the reader unit to an external device.
Speaker Control (if equipped with fax functions.)
It turns on/off or control the volume of the error sound, key sound, and line monitor sound generated by the
speaker.
MEMO:
The volume of the line monitor or the sound of the key sound or the error sound is adjusted in user mode.
2. Construction
The image processor comes in different ROM types/sizes and RAM sizes according to models.
The firmware stored in the flash ROM may be either SYSTEM or BOOT.
Using the service support tool, the following 3 types of firmware may be upgraded: SYSTEM and BOOT stored
in the flash ROM and the firmware stored ion PCL ROM.