Brother HL-3450CN Service Manual page 163

CHAPTER 5 CONTROL PANEL OPERATION
45-5
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.
1) Press the Reprint button after selecting
Screen (a) "NVM TUNE UP". (a)
2) After selecting FBV TUNE UP Code 6, 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 FBV.
FBV TUNE UP
Description of Procedures
(b)
(c)
(c)
o
39 FACTORY MODE
(b)
a)
o
(c)
45 NVM TUNE UP
b)
No.=<123456789>
45 FBV TUNE UP
c)
o
-<432101234>+
(d)
45 NVM TUNE UP
d)
No.=<123456789>
5-38
LCD Message
NVM TUNE UP