Hi Manjeet:
I tried looking up the nomenclature for a TD-1. Apparently it doesn't have a manual override for the shutter, hence it may not be possible for you to have a control on the shutter, unless, the Setup has some features.
Hope the attached link will help some of our fellow members to review and provide their inputs.
http://www.buytelescopes.com/product...3&display=desc
Hope this helps.