Brother HL-2400C Service Manual page 155

45-3 DBV TUNE UP
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.
Description of Procedures
1) Press the Continue button after selecting
Screen (a) "NVM TUNE UP".(a)
2) After selecting DBV TUNE UP Code 3, press
the Continue button.
3) After selecting the color to be adjusted, press
the Continue button. (Ex. Magenta).
4) The adjustment value can be adjusted in 8
steps between -4 and +4.
After selecting a given number, press the
Continue button.
5) Press the Font button to finish the adjustment
work for Magenta.
Repeat steps 3 to 5 for each color.
6) Press the Font button to finish the DBV
adjustment work.
(b)
a)
(b) (c)
b)
(c) (d)
c)
(d)
d)
(d) (e)
e)
(e) (f)
f)
V-34
LCD Message
39 FACTORY MODE
NVM TUNE UP
45 NVM TUNE UP
No.=<123456789>
45 DBV TUNE UP
Y/M/C/K
45 MAGENTA [ ]
-<432101234>+
45 DBV TUNE UP
Y/M/C/K
45 NVM TUNE UP
No.=<123456789>