e-STUDIO200L/202L/230/232/280/282 DEVELOPMENT SYSTEM June 2004 © TOSHIBA TEC
12 - 4
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
Fig.12-3
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).
M
ASIC
TD62385
TA8428
PC1
1
2
3
5
Toner motor
LGC board
PC0
IC8
Engine-
CPU
IC22
IC24
IC1
F1
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