Archana electronics
sai ram towers, 1-1-151/1, alexander road, opp. Lane y.m.c.a, beside hari hara kala bhavan, secunderabad 500003
+91- 40- 27805836 / +91- 9849781055 / +91- 40- 55315836 / +91- 40- 55315804
usk electronics
302, babu khan mall, somajiguda circle, opp.kalaniketan wedding mall, hyderabad - 500016
+91- 40- 39122036
ASHOKA TIMETRONICS
4-1-354/1/2,OPP.REDDY HOSTEL, HOTEL JAYA INTERNATIONAL LANE, ABIDS, HYDERABAD- 500001
+91 - 40- 24755678 / +91- 40- 24757935 / +91- 9849000248
these are authorized as per yamaha.