Xerox Phaser 7400 Service Manual page 643

Printer Status Codes (Continued)
Code Description
F9 Jam at FN9. Paper remains in the saddle transport path
F10 Jam at FN10. Finisher stack eject jam.
H80 Hard Disk Failure.
I1 Jam at IN1. When a sheet remains in the Inverter Lower Sensor when the power is on
and the cover is closed.
I2 Jam at IN2. The Inverter Out Sensor goes High to indicate the sheet's leading edge is
detected, but the trailing edge is not detected within a specified amount of time. This
indicates a sheet remains in the Inverter Out Sensor when the power is turned on or the
cover is closed.
I3 Jam at IN3. The Inverter Out Sensor didn't go High within a specified time following the
Inverter IN Sensor detecting the trailing edge of the sheet.
I4 Jam at IN4. The Inverter IN Sensor goes High as the leading edge is detected, but the
trailing edge is not detected within a specified amount of time. This indicates a sheet
remains in the Inverter IN Sensor when the power is turned on or the cover is closed.
I5 Jam at IN5. The Inverter Out Sensor didn't go High within a specified time following the
receipt of an eject command from the printer.
I6 Jam at IN6. The Inverter Out Sensor remains High.
I7 Jam at IN7. The Inverter IN Sensor goes Low indicating the trailing edge, and the Inverter
Out sensor remains Low. This indicates a sheet remains in the Inverter Lower Sensor.
I8 Jam at IN8. The Inverter In Sensor remains High.
T1 Upper Fuser Failure. Failure in the Heat Roller thermistor.
T2 Lower Fuser Failure. Failure in the Pressure Roller thermistor.
T29 Temperature Sensor Failure. Out of range or erroneous temperature reading.
T30 Humidity Sensor Failure. Out of range or erroneous humidity reading.
T31 Wet Humidity Sensor Failure. Condensation detected in the printer.
T32 LED Head too hot. The LED Head circuitry is too hot.
T34 Imaging Unit Motor circuitry too hot. The Imaging Unit Motor circuitry is too hot.
U0 Engine ROM Failure. Engine Control Board ROM checksum error.
U1 Engine RAM Failure. Engine Control Board RAM read/write error.
U2 Engine EPROM Failure. Engine Control Board EPROM checksum error.
U3 Engine EPROM Missing. Engine Control Board EPROM not detected.
U4 Engine SRAM Failure. Engine Control Board SRAM read/write error.
U5 Engine Controller Failure. Engine Control Board control logic error.
U6 Power Supply Failure. Power Supply output voltage too high.
U7 Feeder Home Position Failure. The Tray 1 (MPT) Home Position Sensor indicates the
feed rollers are out of position.
Reference A-5