Brother DCP-6690CW, Service Manual, Page: 329 / 506

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(3) Press the Black Start ( Mono Start) key several times until the purge (or flushing) count
appears on the LCD.
(4) Press the 2 , 7 , 8 , and 3 keys in this order to reset the purge (or flushing) count.
(5) Press the Stop/Exit key to return to the initial stage of the maintenance mode.
(6) Press the 9 key twice to exit from the maintenance mode.
[ 9 ] Update the paper feeding correction value (Function code 58)
Refer to Section 7.2, [ 5 ] .
[ 10 ] Align vertical print lines (Function code 65)
Refer to Section 7.2, [ 6 ] .
[ 11 ] Adjust margins in borderless printing (Function code 66)
Refer to Section 7.2, [ 7 ] .
[ 12 ] Print out an ADF copy chart and make a copy of that chart in ADF scanning
Refer to Section 7.4, [ 2 ] .
[ 13 ] Check LCD operation and specify the LCD type (Function code 12)
Refer to Chapter 9, Section 9.4.6 .
[ 14 ] Adjust the touch panel (Function code 78) (For models with touch panel)
Refer to Chapter 9, Section 9.4.25 .
[ 15 ] Get EEPROM data (incl. MAC address) from the WLAN PCB (For wireless LAN-
enabled models)
MAC address: Media access control address
(1) Disconnect the USB cable and then press the 9 key twice to return to the standby state.
(2) Models without touch panel
Press the Menu and Black Start ( Mono Start ) keys. Next press the , , , and keys
in this order.
Models with touch panel
Press the
Menu and Black Start ( Mono Start ) keys. Next press the Copy , Scan , Copy ,
and Scan keys in this order.
(3) Press the 0 key twice.
The "SPECIAL MAINT" appears on the LCD.
(4) Press the 0 and 2 keys in this order.
The "PLS INPUT NO.0-b" appears on the LCD.
(5) Enter "A" using the steps below.
Models without touch panel
Press the
1 key with the # key held down.
Models with touch panel
Press the
A key on the touch panel.
No MAC address appears on the LCD, but the main PCB gets the MAC address from the
WLAN PCB. (This operation backs up the EEPROM data stored on the WLAN PCB.)