Toshiba 453 User Manual

e-STUDIO350/352/353/450/452/453

DEVELOPMENT SYSTEM

12 - 3

© 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved

The toner motor (brush motor) is a motor to supply toner from the toner cartridge to the developer unit.
The toner motor is driven by the transistor TA8428 (LGC board: IC51).

Circuit diagram of the toner motor

Motor driver TA8428 (IC51) is connected with both ends of the motor wire.

—  When the PC6 (TNRM1-1) of the ASIC GA becomes “H” and PC7 (TNRM2-1) becomes “L” levels,

current flows into the motor wire and the motor is rotated.

—  When both of PC6 (TNRM1-1) and PC7 (TNRM2-1) of the ASIC GA become “H” level, the motor is

braked and stopped.

—  When both of PC6 (TNRM1-1) and PC7 (TNRM2-1) of ASIC GA become “L” level, the motor waits

for the next command (the motor is stopped).

MAIN

-CPU

IC24

ASIC GA

TD235

TA42

PC

2

3

5

F2

Toner motor

PC7

IC2

IC3

IC5