Actually, I was looking for this information for 3 years!...now thanks to you, the manual is on my hands and of great help, cause I understand now where I was doing wrong connections and wires...excellent, I'll be back to you if in need, thank you.
This manual covers the main equipment features only. While it also includes the procedure for saving and loading from the now long obsolete memory cards it does not mention the how to operate with the optional floppy drive interface so I am still at a loss about how to use this! Note that there is a separate manual covering the MIDI interface and programming via the keyboard, not included in this download. You will also need to get hold of this if you want to use the MIDI interface properly. Basically there is little difference between this manual and the free to download manual for the similar PR60 model.
Good list of manuals. I found a very rare one and easily get. Should be promptly to download, as we must to wait hours even after confirmed payment.
Text excerpt from page 8 (click to view)
The grill
SONATA 55 GLX
General
The shelf in the grill/second oven is different from the shelves in the main oven. It is important that you do not swap them over. Only use the shelf with the solid metal plate underneath it in the grill/second oven. The grill pan handle can be removed. To put the handle on to the pan you should put the chrome bracket over the cut out in the pan and then slide the handle to the left as far as the bump on the pan.
When you are not using the grill you should remove the handle and store the pan on the shelf in the grill. Turn the grill burner off before you store the pan. Remember that the pan will get hot when you are using the main oven. You can use the grill compartment to warm plates when you are using the main oven.
Preheating
You don't usually need to preheat the grill. You may wish to preheat it for a couple of minutes when you are cooking steak or browning food.
Positioning food on the grid
Place food such as toast, tea-cakes and muffins towards the centre of the grid. Place food which needs a gentle heat, such as tomatoes and mushrooms towards the edge of the grid. Arrange meat, meat products and fish to suit their thickness and how you like them cooked.