SD Card Replacement in BC-420. BS-420.

BS-430. BU-BV-420

Preparing for replacement

 Use an antistatic wrist strap

 Disconnect the mains power and battery backup

 Open the front panel

 Unscrew the 4 wing nuts, disconnect all cables (both

ribbon cables, Ethernet cable if used)

 Remove the front panel and place it horizontally on a

table with the yellow label facing upwards

 Tear of the yellow label in order to access the cut out

and the SD Card (see picture)

 Replace the SD Card (see detailed description on next

page)

 Place the new yellow label at the same location as the

previous one

 Reassemble the front panel, tighten the 4 wing nuts,

then reconnect all cables that have been

disconnected

 Close the front panel