Rx Motor Drive Circuit - Toshiba e-STUDIO170F Service Manual

7.3.8

RX Motor Drive Circuit

Main PBA
IC37
Engine-CPU
The RX motor drive circuit consists of the Engine-CPU (IC37), Motor driver (IC21), and other peripheral
devices. It drives the stepping motor connected to CN12 to drive the rollers and transport paper.
The Engine-CPU turns the ENABLE signal to HIGH level and turns Q104 ON. This allows the Motor
driver to generate the drive signal (RXMA, RXMAX, RXMB, RXMBX) of RX motor and sends it to the
RX motor.
The RX motor is driven in steps according to the input drive phase signals.
Signal Name Type
ENABLE
RXMA, AX, B, BX
January 2005 © TOSHIBA TEC
+5V1
R264
IC21
7,9
Motor driver
ENABLE
21
Q104
Fig.7-26
Active
O H RX motor driver enable signal
O - RX motor drive phase signals A, AX, B, BX
7 - 35
RXMA
17 4
RXMAX
15 3
RX motor
RXMB
14 2
RXMBX
12 1
Description
e-STUDIO170F Circuit Description
Destination
Q104
RX motor
7