Brother HL-L9300CDW - 4.11 Troubleshooting for Other Problems; 4.11.1 Cannot make print; 4.11.2 Problem of USB direct interface; 4.11.3 Cannot update firmware

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4.11 Troubleshooting for Other Problems
4.11.1 Cannot make print
< User Check >
- Turn the power OFF/ON.
- Check if the maximum number of pages that can be printed is exceeded.
- Check if PC-print is not prohibited.
- Check the print restricted ID.
- Check if print data is not damaged.
4.11.2 Problem of USB direct interface
< User Check >
- Replace the USB flash memory .
- Check if the extension of the data in the USB flash memory is correct.
4.11.3 Cannot update firmware
< User Check >
- Check if other function is being in process.
- Turn the power OFF/ON.
Step Cause Remedy
1 Main PCB failure Replace the main PCB ASSY.
Step Cause Remedy
1 Connection failure of the USB
host relay PCB harness
Reconnect the USB host relay PCB harness.
2 USB host PCB failure Replace the USB host PCB ASSY.
3 Main PCB failure Replace the main PCB ASSY.
Step Cause Remedy
1 Firmware version does not
match
Reinstall the latest versions of all the
firmwares in the order of the sub firmware,
panel firmware, main firmware, and
high-voltage firmware.
(The panel firmware is available only for the
model with touch panel.)
2 Main PCB failure Replace the main PCB ASSY.