[dtgriscom]

No, that's backwards. It takes about 12 cups of water to fill the inner pot to the "9 cup" line. In other words, 1 cup as measured by the lines is actually 1 1/3 cups (or about 315ml). So, measuring with the lines gives you more than you want, not less (as you would with a rice measuring "cup").

And, the manual doesn't mention anything about the scale (although it does mention the "MAX" line at the top of the pot).

[noworld]

Here's another guess - my rice cooker has line for cups that are for filling with water after you add rice. So, in your case, you put in 9 cups of rice, then add water until it is at the 9 cup line, then that's the right amount of water. The water fills the space between the rice and then fills up to the line.