User's Manual
SMWB Series
LECTROSONICS, INC.
18
Firmware Update
Firmware updates are made using a microSDHC 
memory card. Download and copy the following firm-
ware update files to a drive on your computer.
•  smwb vX_xx.ldr is the firmware update file, where 
“X_xx” is the revision number.
In the computer:
1) Perform a Quick Format of the card. On a Win-
dows-based system, this will automatically format 
the card to the FAT32 format, which is the Windows 
standard. On a Mac, you may be given several 
options. If the card is already formatted in Win-
dows (FAT32) - it will be greyed out - then you do 
not need to do anything. If the card is in another 
format, choose Windows (FAT32) and then click 
“Erase”. When the quick format on the computer is 
complete, close the dialogue box and open the file 
browser.
2) Copy the smwb vX_xx.ldr file to the memory card, 
then safely eject the card from the computer.
In the SMWB:
1) Leave the SMWB turned off and insert the microS-
DHC memory card into the slot. 
2) Hold down both the UP and DOWN arrow buttons 
on the recorder and turn the power on.
3) The recorder will boot up into the firmware update 
mode with the following options on the LCD:
•  Update - Displays a scrollable list of the .ldr files 
on the card. 
•  Power Off - Exits the update mode and turns the 
power off.
NOTE: If the unit screen shows FORMAT CARD?, 
power the unit off and repeat step 2. You were not 
properly pressing UP, DOWN and Power at the 
same time.
4) Use the arrow buttons to select Update. Use the 
UP and DOWN arrow buttons to select the desired 
file and press MENU/SEL to install the firmware. 
The LCD will display status messages while the 
firmware is being updated.
5) When the update is complete, the LCD will display 
this message: UPDATE SUCCESSFUL REMOVE 
CARD. Open the battery door and remove the 
memory card.
6) Re-attach the battery door and power the unit back 
on. Verify that the firmware version was updated by 
opening the Power Button Menu and navigating to 
the About item. See page 6.
7) If you re-insert the update card and turn the power 
back on for normal use, the LCD will display a mes-
sage prompting you to format the card:
  Format Card? 
(files lost) 
• No 
• Yes
  If you wish to record audio on the card, you must 
re-format it. Select Yes and press MENU/SEL to 
format the card. When the process is complete, the 
LCD will return to the Main Window and be ready 
for normal operation.
  If you choose to keep the card as is, you may re-
move the card at this time.
The firmware update process is managed by a boot-
loader program - on very rare occasions, you might 
need to update the bootloader.
WARNING: Updating the bootloader can 
corrupt your unit if interrupted. Don’t update 
the bootloader unless advised to do so by the 
factory.
•  smwb_boot vX_xx.ldr is the bootloader file
Follow the same process as with a firmware update and 
select the smwbboot file. 










