Fan Control; Failure Detection; Low-Voltage Power Supply; Outline - Canon LBP6670dn Series Service Manual

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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.
Description Cooling area
Main Fan FM1 inside the printer

■ Failure Detection

Failure Point Error Code
Main Motor E014 In the case that the speed of motor does not reach the specified
speed after the specified time has passed since the startup of the
Main Motor.
Main Fan E805 In the case that the fan has been locked continuously for the
specified period of time since the startup of the Main Fan Motor.
2 Technology > Controller System > Low-voltage Power Supply > Outline
FM1
F-2-22
Type Speed
intake Full
T-2-6
Cause of Failure
T-2-7

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
Fixing
Noise
control
filter
circuit
Fuse
(FU101)
Fuse (FU102)
Noise filter
+24V generation
circuit
+5V
generation
circuit
Protection
circuit
+3.3V
generation
circuit
Engine controller
Fixing unit
High-voltage
power supply
+24P1
DOOR
SNS
FET
+24U
+24V
PWSV
Door switch
(SW301)
SWON
Power switch
+5V
(SW1001)
+3.3V
DC controller
2-17
F-2-23
2-17