Brother FAX-921 - Manual (Page 13)

CONTENTS
1. OVERVIEW ............................................................................................................... III-1
2. MECHANISMS .......................................................................................................... III-2
2.1 Transmitting Mechanism (Feeding and scanning documents) ......................... III-2
2.1.1 Automatic document feeder (ADF) ........................................................... III-2
2.1.2 Scanner ..................................................................................................... III-3
2.2 Receiving Mechanism (Feeding paper and printing data)................................. III-4
2.3 Power Transmission Mechanism ...................................................................... III-5
2.3.1 Structure of the gear train ......................................................................... III-5
2.3.2 Description of planetary gear system ........................................................ III-6
2.3.3 Power transmission for four operation modes .......................................... III-7
2.3.4 Power transmission route.......................................................................... III-14
2.4 Sensors and Actuators...................................................................................... III-16
3. CONTROL ELECTRONICS ...................................................................................... III-19
3.1 Configuration..................................................................................................... III-19
3.2 Main PCB .......................................................................................................... III-20
3.3 NCU PCB .......................................................................................................... III-22
3.4 Control Panel PCB ............................................................................................ III-24
3.5 Power Supply PCB............................................................................................ III-25