Kyocera FS C5020N - Color LED Printer Service Manual page 179

2-3-2 Engine controller PWB
Operation
panel
PWB
Main
controller
PWB
LED print heads control
EEPROMs control
Paper full sensor signal
LED
print
heads
relay
PWB
Controller
Controller box
box fan
fan motor driver
motor
Main
Main charger control
high
voltage
PWB
Engine
relay
PWB
Primary transfer
motor driver IC (U18)
Toner sensors signals
Engine controller PWB
Reset IC
(U10)
RESET
Eraser driver
circuit (Q13)
(Q12)
(Q8)
ASIC
(Q9)
(Q11)
(U13)
(Q10)
circuit (Q39)
Toner motor
driver circuit
(Q14, Q16)
(Q15, Q17)
(Q20, Q22)
(Q21, Q23)
Drum motor
driver IC (U14)
(U15)
(U17)
Fan motor
driver circuit
(Q27)
(Q28)
Figure 2-3-2 Engine controller PWB block diagram
Sensors/switches signals
RESET
Data/Address
Micro
multiplex bus
controller
Address bus
(U8)
Address bus
EEPROM
(U12)
Face up/down solenoid control
Exit sensor signal
Zero cross signal
Fuser heater lamps control
Abnormal temperature
detection circuit (U1)
Fuser thermistor signals
+24V
Sleep mode
circuit
Sleep signal
Clutch driver
circuit (Q39)
(Q40)
(Q41)
Feed motor
driver IC (U21)
Fuser motor
driver IC (U22)
Transfer charger control
Sensor signals
D-A converter
(U28)
Analog
switches
(U24, U25)
2F3/2F4-3.0
Sensor
PWB
CPU
Flash
Cooling
memory
fan motor
(U9)
(24 ppm
printer
only)
Power
supply
PWB
+3.3V
+5V
+24V
Clutches
Feed
motor
Fuser
motor
Developer
drive stop motor
Optional
paper
feeder/
duplexer
Bias high
voltage
PWB
Toner
ID
sensor
2-3-3