HP LaserJet 4 Service Manual - Page 235

Table 7-1 Printer Messages (continued) Message Symptoms and Recommendations 22 ERROR For serial/Bi-Tronics parallel configuration, the computer and printer are not communicating because of improper 22 SERIAL I/O ERROR signal protocols. This is an I/O buffer overrun error. 22 PARALLEL I/O ERROR 22 HP MIO ERROR Parallel configuration: may mean a loose cable connection. Serial configuration: wrong pacing option may be selected. (If you are using an RS232 serial connection, the HP LaserJet printer uses XON/XOFF and DTR signal protocols rather than ENC/ACK protocol.) Press [Continue]* to clear the error message (data is lost). 40 ERROR 40 BAD SERIAL DATA FORMAT 40 HP MIO ERROR The printer encountered an error while transferring data from the computer. For serial I/O configuration, the error may have occurred because you turned ON or OFF your computer while the printer was on line, or your printer's baud rate or parity was not the same as the computer's. For network MIO cards, this means there was an abnormal connection break. Make sure the printer is set at the same baud rate as the computer. Press [Continue]* to clear the error message. For network MIO cards, see the user's manual for your card. 41.[X] ERROR 41.x PRINTER ERROR x=1, 2, 4 ,5 A temporary error occurred while printing. Press the [Continue]* key to clear the error. If the error persists, refer to "41.X ERROR Message." 41.3 ERROR 41.3 UNEXPECTED PAPER SIZE 50 SERVICE 50 FUSER ERROR 51 ERROR 51 PRINTER ERROR 52 ERROR 52 PRINTER ERROR *Press Go on the LJ5. The paper size selection knob or MP paper size does not match the installed paper or more than one sheet of paper was picked up. Power OFF the printer for a minimum of 10 minutes. If the problem continues, refer to the "50 SERVICE error" section. Indicates loss of laser beam for over 2 seconds. Press [Continue]* to clear this error. If the error persists, refer to the "51 ERROR Message" section. Indicates scanner motor is unable to maintain the proper speed. Press [Continue* to clear this error. If the error persists, refer to the "52 ERROR Scanner Malfunction" section. Troubleshooting 7-5