Brother HL-3450CN Service Manual page 162

Color laser printer
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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 Reprint button after selecting
Screen (a) "NVM TUNE UP". (a)
2) After selecting CBV TUNE UP Code 5, 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 CBV.
o
(b)
a)
o
(b)
(c)
b)
(c)
c)
o
(c)
(d)
d)
5-37
HL-3450CN SERVICE MANUAL
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>

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