I have made a query on engoneerZone few months back on behalf of the above mentioned issue, for this thread
As per the suggestion from the supporters i have made changes in the crystal selection and ac coupling networks.
The schematic sheet is attached here and please comment on this design sheet for the bringing up of AD9912. Last time the AD9912 was not up ,the IC was also heating up drastically even though the power dissipation is nominal. Assuming the Crystals and ac coupling network is not so good. we have changed it this time.