Brother MFC640CW Service Manual page 165

6.4 IF YOU REPLACE THE INK ABSORBER BOX........................................................ 6-26
Reset the purge counter to zero with the following procedure. .......................... 6-26
6.5 IF YOU REPLACE THE CONTROL PANEL PCB (MODELS WITH BACKLIGHTS) ... 6-27
Adjust the light intensity of the backlight. ......................................................... 6-27
6.6 IF YOU REPLACE THE SCANNER COVER (SCANNER UNIT)................................. 6-27
Check the CIS type and write it to the EEPROM. ............................................ 6-27
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