I know TGrant has a manual:
https://www.tgrantphoto.com/sales/in...c-amp-tgp-5021
I'm not sure if he'll try to sell you the manual. Contact him.
We've always been firm believers here that manual should be free. Hardware costs money, user/service info should not.
Broadcaststore.com may have one, ask. It's not online, but they also provide many manuals free, and have/had this TBC.
This all said, it's a lousy TBC. Standard broadcast rackmount junk that chokes on consumer sources (VHS, etc), need advanced servicing/tweaking to work at all, heat/temp issues, etc. It's broadcaster gear, intended for a facility staffed by broadcast engineers.
See:
http://www.digitalfaq.com/forum/vide...ps-leitch.html
NJRoadfan may have the manual as well. Contact him.
If/when you do find it, please attach it in a post here.