[Hallicrafters] S-85 IF transformer issue

[BFetters at aol.com]

Fired up an S-85 the other day.  Tubes all checked out and Deoxited it.  

Got a hissing sound from the speaker and upon further check noticed that the 
IF transformer positioned between the 6SK7 and 6H6 tube was heating up.

Took can off transformer and all looks well.   Have continuity, but could 
tell that it had heated up.

Don't have schematic (can someone send or recommend where to get?)   Also 
would appreciate any thoughts on what is causing the IF xformer to heat up.

Buck