Control Panel; Outline; Power Supply; Protection Function - Canon MF4100 Series Service Manual

9.1 Control Panel

9.1.1 Outline

i-SENSYS MF4150 / i-SENSYS MF4140 / i-SENSYS MF4120 /
The machine's control panel consists of the following PCBs, and is controlled by the SCNT board.

9.2 Power Supply

9.2.1 Protection Function

9.2.1.1 Protecting Function

i-SENSYS MF4150 / i-SENSYS MF4140 / i-SENSYS MF4120 /
In the case of troubles with power supply PCB such as short circuit to loads, and resulted in occurring overcurrent or over overvoltage, there is a protecting function
for overcurrent/overvoltage to automatically shut the output voltage to avoid fault of power supply PCB.
In the case that the protecting function for overcurrent/overvoltage is activated, it recovers by turning off the main power switch to handle the load trouble, and
then, turning on the main switch again. Also, there are 2 pc of fuses in PCB. If there is overcurrent in AC line, fuse is blown out and power distribution is shutdown.
SCNT board Operation panel
Key SW
ASIC
LED
LCD
F-9-1
Chapter 9
0014-7764
0014-5757
9-1