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2-130 Service Manual
5016-001
J 232 Paper Jam displays. The printer does not complete POR.
FRU Action
1 Lower Duplex
Unit Reverse
Sensor (S4)
Check the voltages on the duplex lower unit
reverse sensor on CN907.
Pin # Voltage Voltage Voltage
Signal Closed Open
1 (Red) VL +5 V dc +5 V dc
2 (Yellow) RVSN +5 V dc 0 V dc
3 (Green) DGND 0 V dc 0 V dc
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
2Lower Unit
Paper Feed
Sensor (S5)
Check the voltages on the duplex lower unit paper
feed sensor on CN905.
Pin # Voltage Voltage Voltage
Signal Closed Open
5 (Red) VL +5 V dc +5 V dc
6 (Blue) POSN +5 V dc 0 V dc
7 (Green) DGND 0 V dc 0 V dc
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