Drive Circuit Of Toner Motor - Toshiba e-STUDIO200L/230/280 SERIES Service Manual

12.3 Drive Circuit of Toner Motor

The toner motor (brush motor) is a motor to supply toner from the toner cartridge to the developer unit.
The toner is driven by the motor driver TA8428 (LGC board: IC1).
Circuit diagram of the toner motor
Engine-
CPU
IC22
The motor rotates or stops by the control signals from ASIC.
• When the PC1 (TNRM-1A) of the ASIC becomes "H" and PC0 (TNRM-0A) becomes "L" levels, cur-
rent flows into the motor coil and the motor is rotated.
• When both of PC1 (TNRM-1A) and PC0 (TNRM-0A) of the ASIC become "H" level, the motor is
braked and stopped.
• When both of PC1 (TNRM-1A) and PC0 (TNRM-0A) of ASIC become "L" level, the motor waits for
the next command (the motor is stopped).
e-STUDIO200L/230/280 DEVELOPMENT SYSTEM
ASIC
TD62385
PC1
IC24
IC8
PC0
Fig.12-3
12 - 4
LGC board
1 3
TA8428
F1
2 5
IC1
M
Toner motor
June 2004 © TOSHIBA TEC