Canon i9900, i9950 服务手册
3-4
JCR3 (Print Head 3/3 [Carriage Unit])
No. Signal
name
Function
Input/Output
1 to 8
VH2
Head drive power supply 20V
Out
9
VDD
Head logic drive power supply 3.3V
Out
10
DIK
Diode sensor cathode
Out
11
DIA2
Diode sensor anode 3
In
12
GND
GND
-
13 to 20
GNDH2
GND
-
JPOW1 (AC Adapter)
No. Signal
name
Function
Input/Output
1, 2
VH
Head power supply
In
3 GND
GND
-
4, 5
VM
Motor power supply
In
6, 7
GND
GND
-
8
VH_REMOTE
VH control signal
Out
9
VM_SLEEP
VM control signal
Out
10
+3.3V
Logic power supply +3.3V
In
JPAN1 (Operation Panel Ass’y)
No. Signal
name
Function
Input/Output
1
+3.3V
Operation panel power supply +3.3V
Out
2 GND
Operation
panel
GND
-
3
POW_SW
Operation panel Power SW
In
4
RESUME_SW
Operation panel Resume SW
In
5
LED_RES
Operation panel Resume LED drive signal
Out
6
LED_POW
Operation panel Power LED
drive signal
Out
JPAN2 (Operation Panel Ass’y)
No. Signal
name
Function
Input/Output
1 FG
DSC-DIRECT
GND
-
2
VBUS
DSC-DIRECT VBUS power supply
Out
3 D-
DSC-DIRECT
USB:
D-
signal
Bus
4 D+
DSC-DIRECT
USB:
D+
signal
Bus
5 GND
DSC-DIRECT
GND
-
JUSB1 (USB I/F)
No. Signal
name
Function
Input/Output
1 VBUS
USB:
VBUS
power
supply
Out
2
D-
USB: D- signal
Bus
3 D+
USB:
D+
signal
Bus
4 GND
USB:
GND
-
5 to 9
GND
GND
-
JUSB2 (USB I/F
)
No. Signal
name
Function
Input/Output
1 VBUS
USB:
VBUS
power
supply
Out
2 D-
USB:
D-
signal
Bus
3 D+
USB:
D+
signal
Bus
4 GND
USB:
GND
-
5 to 9
GND
GND
-