Obtains reading value of the DI sensor in the printhead and the head rank value for each color and outputs them to the main controller based on the control commands

from the main controller.

Environment temperature read control function

Outputs the environment temperature detected by the thermistor on the head relay PCB to the main controller based on the control commands from the main con-

troller.

Relay function of the power to the logic components in the printhead

Supplies the power to the logic components in the printhead based on the control commands from the main controller.

b) Multi sensor control IC

These IC's generates the LED control signals and makes gain adjustment for the multi sensor.

c) Image data relay function

This function relays the image data from the main controller PCB to the printhead.

d) Sensor relay function

This function relays the input signals from the multi sensor, lift cam sensor, carriage cover sensor, and linear encoder to the main controller PCB.

2-54

F-2-32

IC401