Canon iPF710 - imagePROGRAF Color Inkjet Printer, Service Manual

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Chapter 2
2-41
2.4.3 Carriage Relay PCB
2.4.3.1 Carriage relay PCB components
0017-5581
F-2-27
a) Regulator IC (IC302)
This IC generates power for the printhead heater.
2.4.4 Head Relay PCB
2.4.4.1 Head relay PCB components
0012-6318
F-2-28
a) Latch IC (IC201)
DI sensor read control function
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 controller.
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) Thermistor (TH201)
The environment temperature surrounding the head relay PCB detected by this thermistor is output to the main
controller through the carriage relay PCB.
c) Multi sensor control IC (IC204, IC205)
These IC's generates the LED control signals and makes gain adjustment for the multi sensor.
IC302
IC204
IC205
TH201
IC201