Canon DADF-R1, Service Manual

Page: 189 / 222

Chapter 5
5-41
5.4.1.4 E410 display lamp
0012-8911
Check Pick-up Motor (M3), Pick-up Roller Height
Sensor 1 (PI 8), Pick-up Roller Height Sensor 2 (PI
9), and then Pick-up Roller Home Position Sensor
(PI 7).
A. Pick-up Motor (M3)
1) Set DIP switch (SW1) on ADF Controller PCB as
shown in a figure.
F-5-134
2) Press push switch (SW2). (Press push switch
again when you want to stop it.)
Each press on SW3 causes the Up/Down
movement.
- Pick-up Motor is rotating: Go to "B. Pick-up
Roller Height Sensor 1 (PI 8)."
- Pick-up Motor is not rotating: Go to the step 3.
3) Replace Pick-up Motor.
If the condition is not improved, go to "B. Pick-up
Roller Height Sensor 1 (PI 8)."
B. Pick-up Roller Height Sensor 1 (PI 8)
1) Prepare a tester, and set the test range as 10 VDC.
2) Move Pick-up Roller unit (rear side) with your
hands up and down, and check voltage between
"J14-A8(+)" connector and "J14-A7(-)"
connector on ADF Controller PCB.
- The voltage is alternately changed 0V and 5V:
Go to "C. Pick-up Roller Height Sensor 2 (PI 9)."
- The voltage is not alternately changed 0V and
5V: Go to the step 3.
3) Replace Pick-up Roller Height Sensor 1.
If the condition is not improved, go to "C. Pick-up
Roller Height Sensor 2 (PI 9)."
C. Pick-up Roller Height Sensor 2 (PI 9)
1) Prepare a tester, and set the test range as 10 VDC.
2) Move Pick-up Roller unit (front side) with your
hands up and down, and check voltage between
"J14-A11(+)" connector and "J14-A10(-)"
connector on ADF Controller PCB.
- The voltage is alternately changed 0V and 5V:
Go to "D. Pick-up Roller Home Position Sensor
(PI 7)."
- The voltage is not alternately changed 0V and
5V: Go to the step 3.
3) Replace Pick-up Roller Height Sensor 2.
If the condition is not improved, go to "D. Pick-up
Roller Home Position Sensor (PI 7)."
D. Pick-up Roller Home Position Sensor (PI 7)
1) Prepare a tester, and set the test range as 10 VDC.
2) Check voltage between "J14-A5(+)" connector
and "J14-A4(-)" connector on ADF Controller
PCB when putting back Pick-up Roller unit to the
home position with your hand.
- When the voltage is about 5 V: Go to the step 3.
- When the voltage is not about 5 V: Go to the step
4.
3) Replace ADF Controller PCB.
4) Replace Pick-up Roller Home Position Sensor.
5.4.1.5 E420 display lamp
0012-8912
Check Communication Cable, Connector, and then
ADF Controller PCB.
A. Communication Cable
1) Check communication cable connecting copying
machine and the machine.
- The cable is connected properly: Go to "B.
Connector."
- The cable is not connected properly: Go to the
step 2.
2) Connect communication cable properly.
If the condition is not improved, go to "B.
Connector."
B. Connector
1) Check a connector (J1) on ADF Controller PCB.
- The connector is connected properly: Go to "C.
ADF Controller PCB."
- The connector is not connected properly: Go to
the step 2.
2) Connect the connector properly.
If the condition is not improved, go to "C. ADF
Controller PCB."
C. ADF Controller PCB
1) Check the cable between the connector (J1) on
ADF Controller PCB and the communication
cable.
- The cable is connected properly: Go to the step
2.
- The cable is not connected properly: Go to the
step 3.
2) Replace ADF Controller PCB.
3) Connect the cable properly.