Brother FAX-931, MFC-970MC, FAX-921 service manual Control Electronics

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