Protection Function; Power-Saving Mode - Canon MF735C Series Service Manual

AC input
Fuse
FU1101
Fuse
FU1102
Rectifying
circuit
+24V
Generation
circuit
Protection
circuit
Low-voltage power supply

Protection Function

Overview
This machine has a protection function against overcurrent and overvoltage.
Description
If overcurrent or abnormal voltage occurs due to a trouble, the DC voltage is automatically cut off to prevent damage to the Power
Supply PCBs.
When no DC voltage is output from the Low Voltage Power Supply Assembly, it is possible that the protection function has been
activated. Therefore, turn OFF the Power Switch, disconnect the AC Power Supply Cord from the inlet, and then fix the trouble
before turning ON the Power Switch again.
NOTE:
Leave the machine as it is for approx. 5 minutesafter disconnecting the cord from the inlet. There are cases where electric charge
remains in the electrolytic capacitor on the primary side of the Power Supply PCB, and time for releasing the electric charge is
needed.

Power-saving Mode

Overview
Power-saving mode is a function that reduces the printer power consumption.
Fixing power supply
Fixing control
circuit
+3.3V
+3.3VA
Generation
circuit
Protection
circuit
+24VA
PSREM24V
+24V
Control circuit
27
2. Technical Explanation (Device)
DC controller
+3.3VA
CPU
+3.3VB
+3.3V
Control circuit
+3.3VC +24V
Main controller, Contol panel
Power switch
SW601
Front door switch
SW1