Brother DCP-L8400CDN Service Manual page 443

1.3.31 Printout of maintenance information (Function code 77)
<Function>
This function is used to print the maintenance information, such as the remaining amount of
consumables, number of replacements, and counter values.
<Operating procedure>
(1) Press the 7 key twice in the initial state of the maintenance mode. Maintenance
information starts to be printed.
(2) When printing is finished, the machine returns to the initial state of the maintenance
mode.
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Maintenance information
Fig. 5-20
5-59
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