Brother HL-3450CN Service Manual page 161

CHAPTER 5 CONTROL PANEL OPERATION
45-3
This mode shall be used when the image optical density needs to be adjusted. Adjustment of
the developer 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 DBV TUNE UP Code 3, press
the Reprint button.
3) After selecting the color to be adjusted, press
the Reprint button. (Ex. Magenta).
4) The adjustment value can be adjusted in 8
steps between -4 and +4.
After selecting a given number, press the
Reprint button.
5) Press the - button to finish the adjustment
work for Magenta.
Repeat steps 3 to 5 for each color.
6) Press the - button to finish the DBV
adjustment work.
DBV TUNE UP
Description of Procedures
(b)
(c)
(d)
(d)
(e)
o
39 FACTORY MODE
(b)
a)
o
(c)
45 NVM TUNE UP
b)
No.=<123456789>
o
(d)
45 DBV TUNE UP
c)
45 MAGENTA [
d)
-<432101234>+
o
(e)
45 DBV TUNE UP
e)
o
(f)
45 NVM TUNE UP
f)
No.=<123456789>
5-36
LCD Message
NVM TUNE UP
Y/M/C/K
]
Y/M/C/K