Canon STAPLER STACKER SS-72 Service Manual page 108

CHAPTER 4
tance between the connector J5-9 and J5-10 on the switch side. If it is not 0 Ω with
the swing guide down and ∞ Ω with the guide up, replace the swing guide close
detection switch (MS2).
3. Swing guide close detection switch (MS6) failure
Action: Disconnect the connector J5 on the staple stacker driver PCB. Measure the resis-
tance between the connector J5-11 and J5-12 on the switch side. If it is not 0 Ω
with the swing guide down and ∞ Ω with the guide up, replace the swing guide close
detection switch (MS6).
4. Swing guide open sensor failure
Action: Measure the voltage between the connector J13-5 and J13-6 on the staple stacker
driver PCB. If it is not 0V with the swing guide down and 5V with the swing guide
up, replace the swing guide open sensor.
5. Staple stacker driver PCB failure
Action: Replace it.
VI-5. Delivery motor failure
<Possible causes>
1. Poor contact in delivery motor clock detection signal line connector
Action: Reconnect the connectors J9, J207 and J210 between the staple stacker driver PCB
and delivery motor clock sensor correctly.
2. Poor contact in delivery motor drive signal line connector
Action: Reconnect the connector J11 on the staple stacker driver PCB.
3. Delivery motor failure
Action: Disconnect the connector J11 on the staple stacker driver PCB. Measure the resis-
tance between the connector J11-6 and J11-7 on the motor side. If it is not about
42 Ω, replace the delivery motor.
4. Delivery motor clock sensor failure
Action: Replace it.
5. Staple stacker driver PCB failure
Action: Replace it.
VI-6. Stapler transfer motor failure
<Possible causes>
1. Poor contact in stapler home position detection signal line connector
Action: Reconnect the connectors J12, J210 and J129 between the staple stacker driver
PCB and stapler home position sensor.
2. Stapler home position sensor failure
Action: Conduct the sensor check mode described on Page 4-7 and see if the sensor is nor-
mal. If it is not normal, replace it.
3. Poor contract in stapler transfer motor drive signal line connector
Action: Reconnect the connector J8 on the staple stacker driver PCB correctly.
4 - 14