I am not sure which number is the 9 digit part code - These are the various id numbers associated with the device - AC-L10A/L10B/L10C AC power adapter - is the part listed in the manual AC-L10A - is the model number on the adapter 20872476 - is the printed number on the adapter DCR-TRV320 - is the camcorder model number 1070172 - is the camcorder serial number I hope one of these numbers will identify the device sufficiently Mike Fuller