Brother HL-2230 Service Manual page 144

(4) Enter the serial number (second digit) shown on the laser serial label attached on the
figure below into the box on the "S xxxxxxVXXYY".
(5) Enter the serial number (the last five digits) into the box on the "Scanner Video Clk.".
(6) Click the [OK] button. The corrected value of the laser unit is written in the printer.
Laser serial label
Laser plate Laser unit
Fig. 4-4
4-13
Confidential