Brother DCP-7090 Service Manual page 82

Error message
Upper line
2-sided -
Disabled
Lower line
The back cover sensor detected
the open state when 2-sided
printing is started (before the
registration of printing in the
engine).
The back cover sensor detected
the open state during 2-sided
printing (after the registration of
printing in the engine).
2-42
Description
Error Refer
codes to:
8903 2-61
8904 2-61
Confidential