Here are the White Balance Settings that have been found on linked to the verious Software versions:
46A-656 1004.0
Sub Bright 128
R Offset 128
G Offset 128
B Offset 135
Sub Contrast 145
R Gain 131
G Gain 128
B Gain 137
46A-656 1006.2
Sub Bright 128
R Offset 128
G Offset 128
B Offset 135
Sub Contrast 145
R Gain 131
G Gain 128
B Gain 137
46-A659, 1006.3
Sub Bright 128
R Offset 128
G Offset 128
B Offset 128
Sub Contrast 140
R Gain 121
G Gain 128
B Gain 111
46-A659, 1007.2 (update)
Sub Bright 128
Red Offset 128
Green Offset 128
Blue Offset 128
Sub Contrast 140
Red Gain 125
Green Gain 128
Blue Gain 136
40-A656, 1007.2 (update)
Sub offset: 128
Red Offset 131
Green Offset 128
Blue Offset 128
Sub Contrast: 145
Red Gain 125
Green Gain 128
Blue Gain 142
NOTE: The A659 model is a Germany only model with 1:60,000 contrast instead of 1:50,000, hence the lower Sub Contrast figure in the service menu!