Replace resistors R411 and R511 with the following values:
Desired Output (V) Resistor Value
2 V 47k5 ohms
2.25 V 39k2 ohms
2.5 V 35k2 ohms
2.75 V 31k0 ohms
3.00 V 27k8 ohms
3.25 V 25k0 ohms
3.5 V 22k1 ohms
3.75 V 21k0 ohms
4 V 20k0 ohms
If you'd like, I can e-mail you a scan of the page in the Alpha manual that has all those instructions.
Hope that helps.
Michael
