Scan Motor Drive Circuit - Toshiba e-STUDIO166 Service Manual

6.4.2

Scan motor drive circuit

The scan motor (M1) is a 2-phase stepping motor and is driven by the motor driver (IC2).
+5V
Excitation mode setting-2 (Fixed at "H")
SCNMD0: Excitation mode Setting-1
ASIC
SCANRST: Resetting
IC23
SCNDIR: Motor rotation direction setting
SCNEN: Cutting off of the drive output
SCNCLK: Clock input
SoC
SCNMVR:
Voltage to set value for the motor current
IC53
MAIN board
e-STUDIO166/206
SCANNER
+5V
VDD
SG
VSS
GND
MODE2
MODE1
RESETB
CWB
ENABLE
CLOCK
VREF
GND
PG1
PG2
Driver IC
GND
IC2
Fig. 6-3
© February 2007 TOSHIBA TEC CORPORATION All rights reserved
6 - 6
+24V
B B
B B
M
A A
A A