Section 4: Troubleshooting
Page: 4-2 PN 9001110A SATO CX400 Service Manual
PRINTER SELF-DIAGNOSIS
A simple self-diagnosis may be initiated by either a series of printer commands or activated via the feed
button located on the printer face. Upon activation of the self-diagnosis process, the printer will print a label
identifying various parameters and conditions as they exist within the system. The table below defines the
parameters and conditions identified on the self-diagnosis label.
Labels feed continuously.
• Ensure media is correctly loaded and that the gap/mark goes through the media sensor.
• Ensure the sensor setup matches the media used. Reprogram as necessary.
Poor print quality:
• Clean the print head.
• Ensure the media is correctly loaded and without lateral movement while being fed.
• Ensure print darkness and print speed settings are sufficient for optimum results.
• Test cycle using a different print media to determine if the media is of inferior quality.
• Ensure the labels are of the correct type for the setup.
Host stops responding or displays “printer not ready” message.
• Ensure the communication cable is connected and not defective.
• If through serial port, ensure that a null modem cable or adaptor is used and that the host and
printer share the same protocol settings. Determine by the self-test label.
• If a communication switch is being used, remove the switch and connect directly to the host.
• Ensure a correct software setup. Refer to software instructions for guidance.
• Restart both the printer and the host, run the original software, and try again.
Self-test label will not print.
• Ensure that the correct media has been loaded.
• Disconnect the communication cable, restart printer, attempt to print again.
SELF-DIAGNOSIS LABEL
Image Pattern (1): Used to check the print head, motor, roller, and other
mechanical assemblies.
Version Information (2): Includes the date code, firmware version, and the check sum
value.
RS232 Protocols (3): Contains the baud rate, parity, data bit number, and the number
of stop bits.
Darkness (4): Provides the darkness setting. May be altered through printer
commands.
Print Length (5): On board memory of the total linear length of print activity. This
non-resettable feature permits monitoring of component life
cycles and warranty validation.
Print Speed (6): Identifies the print speed setting. The default speed is 3 ips.
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