Brother HL-3450CN Service Manual page 164

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 Reprint button after selecting
Screen (a) "NVM TUNE UP". (a)
2) After selecting ADC TUNE UP Code 9, press
the Reprint button.
3) The adjustment value can be adjusted in 8
steps between -4 and +4.
After selecting a given number, press the
Reprint button.
4) Press the - button to finish the adjustment
work for ADC.
o
(b)
a)
o
(b) (c)
b)
(c)
c)
o
(c) (d)
d)
5-39
HL-3450CN SERVICE MANUAL
LCD Message
39 FACTORY MODE
NVM TUNE UP
45 NVM TUNE UP
No.=<123456789>
45 ADC TUNE UP
-<432101234>+
45 NVM TUNE UP
No.=<123456789>