Brother HL-L8250CDN Service Manual page 137

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.
Step
1
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.
Step
1
2
3
4.11.3 Cannot update firmware
< User Check >
- Check if other function is being in process.
- Turn the power OFF/ON.
Step
1
2
Cause
Main PCB failure
Cause
Connection failure of the USB
host relay PCB harness
USB host PCB failure
Main PCB failure
Cause
Firmware version does not
match
Main PCB failure
Replace the main PCB ASSY.
Reconnect the USB host relay PCB harness.
Replace the USB host PCB ASSY.
Replace the main PCB ASSY.
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.)
Replace the main PCB ASSY.
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Remedy
Remedy
Remedy
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