Toshiba e-studio550 Service Manual page 89

6. 3. 2. Two-phase motor drive circuit (fixed-current type)
The scanner motor with the unipolar fixed current chopper method is driven by the stepping motor
driver STK672-080 (IC4).
JUNE 2002 © TOSHIBA TEC 6 - 5 e-STUDIO550/650/810 SCANNING SECTION