Fan Control; Low-Voltage Power Supply; Outline - Canon imageCLASS LBP6780dn Service Manual

2
Technology > Controller System > Low-voltage Power Supply > Outline

■ Fan control

The printer has one fan for preventing a temperature rising inside the printer.
Arrangement of fan motor and the specifications are shown below.
Sub fan
Description Cooling area
Main Fan FM1 inside the printer
Sub Fan FM2 inside the printer
2 Technology > Controller System > Low-voltage Power Supply > Outline
Main fan
F-2-21
Type Speed
intake Full
intake Full
T-2-5

Low-voltage Power Supply

■ Outline

The low-voltage power supply converts AC power from the power receptacle into DC power
to cover the DC loads.
Block diagram of the Low Voltage Power Supply is shown below.
Low-voltage power supply
Fuse(FU1001)
Noise filter
Fuse(FU1002)
Noise filter
+3.3V
+3.3V generation
circuit
+24V
+24V generation
REM24
circuit
Protection
circuit
+5V generation
circuit
2-16
Engine controller
Fixing control
Fixing unit
circuit
Power switch
control circuit
Power switch
(SW240)
High-voltage
power supply
/FDOORSNS
+24R
Door switch
(SW501)
DC controller
+24U
+3.3V
+5V
F-2-22
2-16