Brother MFC990CW Service Manual page 81

Scanner Mechanism
(See Section 3.2.1.)
Printing Mechanism
(See Section 3.2.2.)
Encoders
(See Section 3.2.3.)
Sensors
(See Section 3.2.3.)
Thermistors
(See Section 3.2.3.)
- Document scanning mechanism
- Automatic document feeder (ADF)
*1
mechanism
- Ink supply and ink jet mechanism
(See Section 3.2.2.1.)
- Head maintenance mechanism
(See Section 3.2.2.2.)
(Head capping and carriage lock)
+
(Purge, air removing, and head wiper)
- Carriage drive mechanism
(See Section 3.2.2.3.)
- Paper pulling-in, registration, feeding
and ejecting mechanisms
(See Section 3.2.2.4.)
- Paper feed motor encoder (PF encoder)
- ASF motor encoder (ASF encoder)
- Carriage motor encoder (CR encoder)
- Document front sensor
- Document rear sensor
- Scanner cover sensor
- Ink cartridge cover sensor
- Registration sensor
- Paper width (media) sensor
- Purge cam switch
- Cap lift cam switch
- Ink empty sensors (black, yellow, cyan and magenta)
- Ink cartridge detection sensors (black, yellow, cyan and magenta)
*3
- Hook switch
- Head thermistor
- Casing internal temperature thermistor
3-4
CIS motor
(stepping motor)
ADF motor
(stepping motor)
ASF motor
Paper feed motor
(DC motor)
Carriage motor
(DC motor)
ASF motor
Paper feed motor
(DC motor)
*1
*1
For models with ADF
*1
ASF motor: Auto Sheet Feeder motor
*2
For models with handset
*3
*1
*2
(DC motor)
+
*2
(DC motor)
+
Confidential