Thank you for the reply. I probably would not be able to verify it until at least the weekend. From the searches I have done everything seems to indicate that the ICs in the set are in fact the STK392-110. I guess my concern in replacing them with the STK394-160s was that you indicated in your original post that 'it should work' so I wasn't certain about this particular set.
I think they are going to just order them here
http://servicemanuals.vstore.ca/prod...onvergence-ics Hopefully they will work out OK. I am assuming that price is for a single IC and not a pair. They can get the service manual there also from the looks of it.
P.S. Thank you very much about the tip/warning about opening it from the back.