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Confidential
3.3 CONTROL ELECTRONICS
3.3.1 Components
The following illustration shows the hardware components. The corresponding wiring diagrams
appear in Appendix 5.
* For wireless LAN-enabled model.
Main PCB
Control panel PCB
Scanner cover sensor
Ink cartridge cover sensor
Carriage PCB
CR encoder sensor
Head thermistor
13-wire (Head 1)
11-wire (Head 3)
12-wire (Head 2)
Head/
carriage
unit
Paper width sensor
2-wire
Carriage motor
12-wire
4-wire
4-wire
5-wire
CIS motor
Paper feed motor
SCANNING
INK JET PRINTING & PAPER FEEDING
Media 1
(xD/SD/MS
card)
Media 2
(CF card)
Ink refill ASSY
9-wire
2-wire
2-wire
EEPROM
DC motor driver
Stepping motor driver
Ink empty sensor PCB
Ink empty sensors
Purge cam switch
Cap lift cam switch
Maintenance unit
ADF motor
ADF unit
Document rear sensor
Stepping motor driver
PF encoder PCB
PF encoder sensor
Registration sensor PCB
7-wire
2-wire
5-wire
5-wire
PictBridge
USB
Registration sensor
4-wire
3-wire
- Digital camera
- USB flash memory drive
Casing internal temperature thermistor
2-wire
2-wire
MJ PCB
Line
External telephone
SDAA
DC motor driver
DC motor driver
7-wire
Ink cartridge detection sensor PCB
Document front sensor
CIS unit
2-wire
Speaker
Document sensor PCB
(BlockDiagram_BHL9_A3)
LAN
LAN I/F
PC
USB
Color LCD
28-wire
Backup battery
5-wire
ASF motor
ASF encoder sensor
ASF motor unit
4-wire
2-wire
MODEMROM
SDRAM
64MB
Main
ASIC
12MB
Ink cartridge detection sensors
Power supply
PCB
AC line
WLAN*
WLAN PCB
5 wires used in
6-wire connector
housing
*
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