Brother HL-2700CN Series, Service Manual

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V-34
45-3 DBV TUNE UP
This mode shall be used when image optical density needs to be adjusted. Adjustment is
to adjust the developer bias voltage against the reference value 0 (zero) in the range
between the step -7 and +7.
Description of Procedures LCD Message
1) Press Set key after selecting NVM TUNE
UP. (a) → (b)
2) After selecting DBV TUNE UP Code 3, press
Set key. (b) → (c)
3) After selecting the color to be tuned up,
press Set key. (Ex. Magenta) (c) → (d)
4) Tune Up value can be adjusted within 8
steps between the step -7 and +7.
After selecting a given number, press Set
key. (d) → (e)
5) Press the - key to wrap up the tune-up work
for Magenta. (d) → (e)
Repeat the step 3 through 5 for each color.
6) Press the - key to wrap up the DBV tune-up
work. (e) → (f)
39 FACTORY MODE
NVM TUNE UP
45 NVM TUNE UP
1 2 3 4 5 6 7 8 9 10 12 16
45 DBV TUNE UP
Y / M / C / K
(a)
(b)
(c)
45 MAGENTA [ -1 ]
-< 7 6 5 4 3 2 1 0 1 >+
(d)
45 DBV TUNE UP
Y / M / C / K
(e)
45 NVM TUNE UP
1 2 3 4 5 6 7 8 9 10 12 16
(f )