Brother International HL-2400C Service Manual - Page 157

45-5 FBV TUNE UP This mode should be used when image defects attributed to the transfer drum need to be improved. Adjustment is to adjust the drum cleaner bias voltage against the reference value 0 (zero) in the range -4 and +4. Note: Do not perform this mode frequently. Description of Procedures LCD Message 1) Press the Continue button after selecting Screen (a) "NVM TUNE UP".(a) → (b) 2) After selecting FBV TUNE UP Code 6, press the Continue button. (b) → (c) 39 FACTORY MODE a) NVM TUNE UP 3) The adjustment value can be adjusted in 8 steps between -4 and +4. 45 NVM TUNE UP b) No.= After selecting a given number, press the Continue button. (c) 45 FBV TUNE UP 4) Press the Font button to finish the adjustment c) -+ work for FBV. (c) → (d) d) 45 NVM TUNE UP No.= V-36