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1.2.2 Installing firmware
<Operating Procedure>
Common to all models
(1) If the computer is connected to the machine using the USB cable, disconnect the USB 
cable to enter maintenance mode. (Refer to “1.1  How to Enter Maintenance Mode” in 
Chapter 5)
(2) Connect the machine to your computer using the USB cable.
(3) Open the temporary folder and double-click "FILEDG32.EXE" to start it, and select 
"Brother Maintenance USB Printer".
(4) Drag and drop the required program file (ex: LZXXXX_$.djf) in the same folder onto the 
Brother Maintenance USB Printer icon. The file is loaded to the machine, and installing 
to the flash ROM starts.
(5) When installing is completed, the machine restarts and returns to the ready state 
automatically.
(6) Turn OFF the power switch of the machine, and then repeat the procedures (1) to (5) to 
install required firmwares.
(7) Turn OFF the power switch of the machine, and disconnect the USB cable.
1.3 Initializing the EEPROM of the Main PCB ASSY
(Function code: 01)
Initialize the EEPROM of the main PCB ASSY as described in “1.3.1  Initialize EEPROM 
parameters (function code: 01, 91)” in Chapter 5.
Note:
• Install the Sub firmware → Demo firmware → Panel firmware → Main firmware in this 
order.
• DO NOT disconnect the power cord or USB cable from the machine or computer 
during installing.
• If the install is failed, turn OFF the machine and turn it back on. The machine enters 
the firmware installing mode automatically. Continue to the operating procedure below 
from the procedure (2).