Lexmark Optra C710 Service Manual page 195

5016-001
FRU
3 Paper Pass
Sensor
Rear Duplex
Unit (S3)
4 Lower Unit
Parts
5 Lower Unit
Reverse Motor
Action
Check the voltages on the duplex rear unit paper
pass sensor on connector CN904.
Pin # Voltage
Signal
8 DGND
10 BPSN
12 VL
All voltages are approximate values.
• If the voltage on pin 12 is incorrect, replace the
duplex option controller board.
• If the voltage on pin 10 does not change when
the sensor is opened and closed, replace the
FRUs in the following order:
1. Duplex rear unit paper pass sensor
2. Duplex option controller board
Check all parts associated with paper movement
in the lower duplex unit for correct operation and
signs of wear, broken parts or binds. Repair or
replace as necessary.
Check the voltage on the lower duplex unit reverse
motor on CN906.
Pin # Voltage
Signal
1 (Blue) BPB
2 (Brown) COM
3 (Orange) BP
4 (Yellow) AP
5 (Red) APB
All voltages are approximate values.
• If the voltages are correct, replace the motor.
• If the voltages are incorrect, replace the duplex
option controller board.
Voltage Voltage
Closed Open
0 V dc 0 V dc
+5 V dc 0 V dc
+5 V dc +5 V dc
Voltage
Static
+24 V dc
+24 V dc
+24 V dc
+24 V dc
+24 V dc
Diagnostic Information
2-129