2GL/2FV/2FW
2-3-3
2-3-2 Engine/high voltage PWB
Figure 2-3-2 Engine/high voltage PWB block diagram
The engine/high voltage PWB consists mainly of CPU (U1) and it is primarily divided into the engine circuit section that
controls the entire hardware such as the process and paper feeding/conveying mechanism and the high voltage circuit
section that generates various high voltages to output during the process operation.
EEDIO
EECLK
RESETN
EEPROM
(U2)
Reset IC
(U3)
TNFULL
TONER
ERASERON
FANH
FANL
MMOTON
MOTCLK
MMOTRDY
ZCROSS
SLEEPN
HEATNHEAT
THERM
EXITPAP
ILOCK
ILOCK
Main charger
24V2
Exit
sensor
5V
Developing bias
Transfer bias
24V2
24V1
24V1
Cooling fan
motor
Main motor
Main PWB
Fuser
thermistor
Power
source
PWB
PLGON
PLGRDY
Interlock
switch
FPSW
Engine/high voltage PWB
FPLED1, FPLED2
BUZZ
Buzzer
REGSOLON
FEDSOLON
PLGCLK
OUTPEN
Operation
panel PWB
Connect
PWB
Registration
clutch
Feed clutch
Paper
sensor
Registration
sensor
RESETN
PLGCLK
EGIRN
SDIR
SBSY
PDMASKN
EGSI
EGSO
CPU
(U1)
High
voltage
circuit
Fuser
temperature
abnormal
circuit
Toner empty
sensor
Waste toner
full sensor
Eraser lamp
PWB
Laser
scanner
unit
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