Toshiba 4560 Service Manual page 146

10.4 Brush Motor (Toner Motor (M 9)) Drive Circuit
The toner motor is provided to supply toner for the developer unit.
The toner motor is driven by transistor 2SD1417 (Q2 on the logic PC board), and its circuit is structured
as follows.
MAIN-CPU
P62
IC35
The motor winding is connected to the +24V at its (+) side and to the collector of Q2 at its (–) side.
– When P62 (TMOT-ON signal) of the main-CPU becomes "L" level –
• Q10 is turned ON
• The +24V power supply supplies current in Q2 via the motor winding
– When TMOT-ON signal becomes "H" level –
• Q10 is turned OFF
• The current which was flowing in the motor winding flows via the route of diode D2.
~ It decreases at the rate of the time constant determined by the inductance and resistance of the
winding.
Nov. 1997 © TOSHIBA
+5SW
Q10
63
TMOT-ON
Q2 is turned ON
Q2 is turned OFF
+24
D2
R157
Q2
R156
2SD1417
PWA-LGC
10 - 13
Toner motor
the motor rotates
4560/4570 DEVELOPER