Richard and John.
The answers to your question is the resistors are 2W not 0.5 W
Ihad 0.047 uf capacitor and 56 ohm resistor blown.
The supplier I found was at www.torelectrics.co.uk. I ordered both + the triac.They arrived in 5 days cost £10.63 including post.Just look for kenwood chef A901 on catalogue.Rgds John.
John Holtham, September 2007