Brother International HL-3400CN Service Manual - Page 164

CHAPTER 5 CONTROL PANEL OPERATION PR2001003 45-6 ADC TUNE UP This mode should be used to improve the problem when there is insufficient separation of paper from the transfer drum (when the winding jam occurred around the drum). Using the mode, you can adjust the bias voltage of paper discharging output from the high-voltage power supply unit. 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 1) Press the Continue button after selecting Screen (a) "NVM TUNE UP".(a) -p (b) a) 2) After selecting ADC TUNE UP Code 9, press the Continue button. (b) -> (c) 3) The adjustment value can be adjusted in 8 b) steps between -4 and +4. After selecting a given number, press the Continue button. (c) 4) Press the Font button to finish the c) adjustment work for ADC. (c) -> (d) LCD Message 39 FACTORY MODE > NVM TUNE UP 45 NVM TUNE UP No. = 45 ADC TUNE UP -+ d) 45 NVM TUNE UP No.= 5-42