4 Instruction Guide
Replacing the NPD Bead
Required tools
• T- 10 Torx screwdriver
GC Firmware
• If using a 7890A Series GC, it is recommended that the
firmware version is A.01.09 or higher.
• If using a Blos bead on a 7890A Series GC, make sure the
firmware version is A.01.09 or higher.
• If using a 6890 Series GC, make sure the firmware version is
A.03.05 or higher.
• If using a Blos bead on a 6890 Series GC, make sure the
firmware version is A.03.08 or higher. (Firmware versions
earlier than A.03.08 will immediately destroy a Blos bead if
you use the Adjust Offset feature.)
Figure 1 Blos bead assembly
NPD Bead Replacement.book Page 4 Monday, October 13, 2008 2:32 PM