The interface or formatter PCA is defective.
An attempt is being made to print envelopes while the printer is in
The output selector knob is not in duplex position.
An invalid input source or output destination has been selected.
If x=1: invalid input source.
If x=2: invalid output destination.
– Check the input and output devices.
Reselect a valid device.
The memory card is incompatible.
– Remove the card and replace it with a 1, 2, 4, or 8 MB, 5V, 70
nanosecond (nsec.) or faster card.
6P, 5P, 5
The main motor is not functioning properly.
– Check for any binding in the motor or gear train. Check the
connection to the DC controller, and then replace the main motor
or the DC controller as necessary.
54 – Control panel messages