Brother DCP-9040CN Service Manual page 446

Toner cartridge(K, Y, M, C) and Drum unit serial label
TKCM7JA000001ELR1189
Unit type
DR: Drum unit
TM: Toner unit Magenta
TC: Toner unit Cyan
TY: Toner unit Yellow
TK: Toner unit Black
Model type
C: AC
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Serial label
Fig. App3-9
Fig. App3-8
Drum unit
Toner cartridge
App.3-4
Barcode
Part code
Assembly line number
Serial number (6-digit)
Toner filling amount (A D, 5)
Manufacturing factory No.
Year of manufacture
7: 2007
8: 2008
Month of manufacture
A: January
G: July
B: February
H: August
C: March
J: September
D: April
K: October
E: May
L: November
F: June
M: December
Fig. App3-10
Serial label
Confidential