There are different versions of the C3024 board. The order of the servo connectors 12-23 changes and Tx and Rx change.
See below for variants
24 August 2008

v2.5 (2005 - 2008)

Below, the servo connector pinpouts, TX & Rx, and groupings A-D, agree with my RoboNova, board v2.5
Images from RoboNova Manual-Eng-V1.50.pdf downloaded from Hitec May 2008


Servo allocation not as described in manual, solution
lezed Posted: Sat Jul 19, 2008

As printed in my manual, not suitable for my robot:

As found on hitec website in the latest version of the manual, suitable for my robot:

New Nova, totally stumped
yag-freak Posted: Wed Apr 12, 2006