Lexmark 302 - Manual (Page 210)

1. Turn the power Off (O).
2. Wait 10 seconds, then turn the power On (|).
3. If the printer displays this status code again, or if the printer
displays
call for service.
1. Press Stop.
2. Press Cancel Print.
3. Check that the serial configuration parameters are set correctly.
4. Press Start.
5. If the status code occurs again, call for service.
19 PRINTER BOARD FAILURE
SEE USER'S GUIDE
66 PRINTER BOARD FAILURE
SEE USER'S GUIDE
21 RECEIVE BUFFER OVERRUN
PRESS STOP THEN CANCEL PRINT
23 TRANSMIT BUFFER OVERRUN
PRESS STOP THEN CANCEL PRINT
24 PARITY ERROR
PRESS STOP THEN CANCEL PRINT
25 FRAMING ERROR
PRESS STOP THEN CANCEL PRINT
B-10 User’s Guide Model 302