3 ] Nvram Tune Up (Code 45) - Brother MFC-9420CN Service Manual

[ 3 ] NVRAM Tune Up (Code 45)

Although this mode is not used normally, it consists of the five modes which allow you to
adjust the value of each section exactly.
Always implement the operations of all these modes when replacing the engine control
board.
[ 3 ]-1 LP Tune Up
[ 3 ]-2 THV Tune Up
[ 3 ]-3 DBV Tune Up
[ 3 ]-4 CBV Tune Up
[ 3 ]-5 FBV Tune Up
[ 3 ]-6 Factory Use
[ 3 ]-1 LP Tune Up (Code 45-1)
Function
This function is used when it is required to adjust the print density, line thickness, hue or the
like. The adjustment is implemented by changing the laser power, and it is changeable by ±7
steps from the standard value "0".
Always implement the operation when replacing the engine control board.
Operating Procedure
(1) Select NVM Tune UP with using the 4 or 5 key in the initial stage of the factory mode.
After selecting, press the 6 key.
The "45 NVM TUNE UP / ▲ 2 3 4 5 6 7 8 9 A B C D E F G" appears on the LCD.
(2) Select "1" with using the 4 or 5 key and press the 6 key.
(3) Select the color to be adjusted with using the 4 or 5 key and press the 6 key.
(4) Select the optional number with using the 4 or 5 key and press the 6 key.
The data is written into the NVRAM.
The value can be adjusted by ±7 steps.
(5) Press the 3 key so that the display is returned to the message described in Step (1).
When adjusting other colors, repeat Step (2) to (5).
(6) Press the 3 key again, and the machine returns to the initial stage of the factory mode.
8 -4 1 Confidential