fuse went- lost code help much appreciated?

Thanks for your time and effort in helping others- radio works thanks to you. All the best to you.

Jamie
January 2010

using the serial number
subtract the second number from the 1st number.this is your first digit
add the second number to the last numer and then subtract it from the first number.this is the second digit
subtract the second number from the fifth number.this is the 3rd digit
add the first number to the last number.this is you 4th digit

audiocoding
January 2010