The earlier data/manual is wrong for the +5V supply (I changed LCD suppliers after the manual was written for the prototype).
Backlight is 'BRIGHT' = 175ma of +5V
Backlight is 'NORMAL' = 100ma of +5V
Backlight is off = 20ma of +5V
The manual is ....errr....fubar.
Also note, the '650 needs ∗all 3 supplies∗.
Paul S.