Brother HL-2400C Service Manual page 156

45-4 CBV TUNE UP
This mode should be used when image defects attributed to the OPC belt need to be
improved. Adjustment is to alter the OPC belt bias voltage against the reference value 0
(zero) in the range -4 to +4.
Note: Do not perform this mode frequently.
Description of Procedures
1) Press the Continue button after selecting
Screen (a) "NVM TUNE UP".(a) → (b)
2) After selecting CBV TUNE UP Code 5, press
the Continue button.
3) The adjustment value can be adjusted in 8
steps between -4 and +4.
After selecting a given number, press the
Continue button.
4) Press the Font button to finish the adjustment
work for CBV.
a)
(b) → (c)
b)
(c)
c)
(c) → (d)
d)
V-35
LCD Message
39 FACTORY MODE
NVM TUNE UP
45 NVM TUNE UP
No.=<123456789>
45 CBV TUNE UP
-<432101234>+
45 NVM TUNE UP
No.=<123456789>