Brother DCP-7030 Service Manual page 311

■ Toner cartridge and Drum unit serial label (in common)
<How to read>
Month of manufacture
A : January E : May
B : February F : June
C : March G : July
D : April H : August
Year of manufacture
7: 2007
8: 2008
<Location>
Serial label
Fig. App. 3-7
J : September
K : October
L : November
M : December
Fig. App. 3-6
Toner cartridge
App. 3-4
Assembly line number
Serial number (6-digit)
Toner filling amount (A to D, 5)
Manufacturing factory No.
Drum unit
Fig. App. 3-8
Serial label
Confidential