Engine/High Voltage Pwb - Kyocera FS-6020 Service Manual

2-3-2 Engine/high voltage PWB

Switch
sensor
Toner sensor
Fan motor
Main
motor
Fixing
thermistor
Fixing
heater lamp
Power
source
PWB
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 conveying mechanism and the high voltage circuit section that
generates various high voltages to output during the process operation.
Engine/high voltage PWB
<Engine circuit section>
HANDSN, FDPFULN, EXIT
CAS0-2, PAPVOL1-2
TNEMP
FANDRN, PFANDRN
MOTONN
MOTORDYN
THERM
Fixing heater
HTEMPN
lamp ON -
Runaway prevention -
Fixing thermistor
THDEAD
disconnection
detection circuit
HEATON
ZCROSS
5 V DC, 24 V DC
Reset
circuit
(U2)
Figure 2-3-3 Engine/high voltage PWB block diagram
REGPAP Registration
sensor
SBSY, SDIR, EGIRN, PDMASKN,
EGSO
SCKN, EGSI
MIDDRN, FEDDRN,REGDRN, MPFSOL
POLON, OUTPEN
POLDYN
ERASER
CPU
(U1)
EEDIO
EEPROM
EECLK
circuit
(U3)
OPRDYN
OPSDI/OPSDO
OPSCLK
OPSEL0-3
<High voltage circuit section>
Developing bias
output circuit
THVDR,
TSEL1-2
RHVDR
Transfer bias
output circuit
MHVDR,
MSEL1-2 Main charger
output circuit
SHVDR,
SHVSEL
Separation bias
output circuit
FS-6020
Clutch
solenoid
Main PWB
Laser
scanner
Eraser lamp
unit
Paper
feeder
(optional)
Duplexer
(optional)
Developing roller
Transfer roller
Main charger
Separation
charger brush
2-3-3