User manual

95.08.23.11.31
Color LaserWriter 12/600 PS Basics & Theory 1–143
Outline
The power switch uses a remote switch method. When the power
switch (SW1) is turned on, the DC controller is informed of this by the
power supply circuit. The DC controller turns on the control IC in the
power supply circuit, and the AC power supply is sent to the power
supply circuit via the circuit breaker, the noise filter, etc.
DC Controller Board
CB101
Rectifier
Circuit
Power
Switch
(SW1)
Circuit
Breaker
To
Fuser
Heater
+24 VB
Door Switch
(SW2)
Fuser Heater Safety Circuit/
Fuser Abnormality Detection Circuit
POFF
Laser
Drive
Scanner
Motor
Motors
Solenoids/
Clutches
High-Voltage
Power Supply
+5V
+24VA
Sensors
+5V
Sheet
Feeder
DC-DC
Convertor
Fuse
Switching
Transistor
Control IC
Regulator IC
Power Supply Board
Noise
Filter
Rush Current
Prevention
Photo-
coupler
Mechanical
Controller Board
+24 VA
F1
I/O
Controller
Board
+5 V
Fuser Heater
Drive circuit
PCONT
+5 VB
+24 VB
Pickup
Board
Fans
+24V
+5V
+24VA
+24VB
+24VB
+5V
+24VB
+5V
Transformer
Rectifier
Circuit
24 V
Overvoltage
/FXROF, /FXENB,
/FXUON,/ FXLON
SFSNS,FXSTS ,THI
+5V
DOPN
+12V
12V Generation
Circuit
+24VC
24 VC Generation
Circuit
/FXROF, /FXENB,
/FXUON,/ FXLON
SFSNS,FXSTS ,THI
AC Power
Supply
24 V
Overcurrent
Photo-
coupler
5 V Overcurrent/
Overvoltage Detection
Circuit