If you cannot locate the manual for some reason you can cancel (or restore) the end alarm as below:
Press and hold down one of the function buttons (this will vary depending upon the age and model of the machine). It could be the Eco 50, Quick 35/45 or the Time Delay button. If you chose the wrong button it will do no harm but if you do change an existing setting make sure that you restore it before doing anything else.
Whilst holding the button down press the Power or Start button then release the function button.
If there is no LCD display on the machine the LED above the button will flash, if you have an LCD display it will show a number between 0 and 3. With the former pressing the function key will turn the alarm on and off, with the latter pressing the function key will change the alarm volume, 3 being loud and 0 being off.
Press the Power or Start button again and your chosen setting will be saved.
Mark Speers, September 2009