Cleaning Solenoid Circuit - Ricoh FT8680 Service Manual

31 July 1995

9.7 CLEANING SOLENOID CIRCUIT

Main PCB
Scan 2
The main PCB energizes RA301 and 303 for 0.3 seconds to supply +38 V for
the cleaning blade solenoid at the initial solenoid activation. The RA301 and
303 are then turned off and +24 V is supplied to the cleaning solenoid.
The main PCB sends a pulse signal to the coil overload sensor through the
interface PCB. When the overload sensor is actuated, the pulse signal is
returned to the main PCB. The main PCB is monitoring this signal change for
toner collection coil blocking.
DC Drive PCB
Cleaning
Sol
Interface PCB
Scan 2
2-65
CLEANING
Overload
Sensor
A171D527.wmf