Lexmark Optra C710 Service Manual page 196

5016-001
J 232 Paper Jam displays. The printer does not complete POR.
FRU
1 Lower Duplex
Unit Reverse
Sensor (S4)
2 Lower Unit
Paper Feed
Sensor (S5)
2-130
Service Manual
Action
Check the voltages on the duplex lower unit
reverse sensor on CN907.
Pin # Voltage
Signal
1 (Red) VL
2 (Yellow) RVSN
3 (Green) DGND
All voltages are approximate values.
• If the voltage on pin 1 is incorrect, replace the
duplex option controller board.
• If the voltage on pin 2 does not change when
the sensor is opened and closed, replace the
FRUs in the following order:
1. Duplex lower unit reverse sensor
2. Duplex option controller board
Check the voltages on the duplex lower unit paper
feed sensor on CN905.
Pin # Voltage
Signal
5 (Red) VL
6 (Blue) POSN
7 (Green) DGND
All voltages are approximate values.
• If the voltage on pin 5 is incorrect, replace the
duplex option controller board.
• If the voltage on pin 6 does not change when
the sensor is opened and closed, replace the
FRUs in the following order:
1. Duplex lower unit paper feed sensor
2. Duplex option controller board
Voltage Voltage
Closed Open
+5 V dc +5 V dc
+5 V dc 0 V dc
0 V dc 0 V dc
Voltage Voltage
Closed Open
+5 V dc +5 V dc
+5 V dc 0 V dc
0 V dc 0 V dc