Sharp AR-6020V Service Manual page 21

4. Production number identification
<Toner cartridge>
The label on the toner cartridge shows the date of production.
Production Serial
place number
<Developer>
1 2 3 4
The lot number is of 8 digits. Each digit indicates the content as follows.
The number is printed on the right under side of the back surface of the
developer bag.
1 Alphabet
Indicates the production factory.
2 Number
Indicates the production year.
3, 4 Number
Indicates the production month.
5, 6 Number
Indicates the production day.
7 Hyphen
8 Number
Indicates the production lot.
Year/ Ver.No.
Month/
Day
5 6 7 8
AR-6020V CONSUMABLE PARTS 3-3
<Drum>
The laser print indicates the model conformity code and the date (year,
month, day) of production.
1 2 3 4
1 Alphabet
Indicates the model conformity code. L for this model.
2 Number
Indicates the end digit of the production year.
3 Number or X, Y, Z
Indicates the month of packing.
X stands for October, Y November, and Z December.
4, 5 Number
Indicates the day of the month of packing.
5