Lexmark Optra C710 Service Manual page 192

5016-001
G POR incomplete. Close door message displays when duplex
option installed and all doors and covers on the duplex are closed.
FRU
1 Tray Present
Detect Sensor
(S9)
Duplex Option
Controller Board
2 Duplex Upper
Unit Door Open
Sensor(S6)
Duplex Option
Controller Board
2-126
Service Manual
Action
Check the voltages on the duplex tray detect
sensor on connector 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 duplex tray is open and closed, replace the
FRUs in the following order:
1. Tray detect sensor (DRSN)
2. Duplex option controller board
Check the voltages on the duplex upper unit door
open sensor on connector CN904.
Pin # Voltage
Signal
14 VL
16 (yellow) DOSN
18 DGND
All voltages are approximate values.
• If the voltage on pin 14 is incorrect, replace the
duplex option controller board.
• If the voltage on pin 16 does not change when
the upper unit cover is opened and closed,
replace the FRUs in the following order:
1. Duplex upper unit door open 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
+5V dc +5V dc
+5 V dc 0 V dc
0 V dc 0 V dc