Heres how I fixed mine, I managed to get the clock back to full functionality without replacing it.
Fault;
first was unable to set time.
Eventually clock would not allow oven to operate.
Repair:
( I accept no liability for damage or injury for anyone that follows this instruction. I merely describe how I fixed my own oven.)
I removed the timer as described.
I then carefully removed the PCB from the timer by easing it past the plastic tangs that hold it, easing each tang gently back one by one.
I traced the fault to the large 220 UF capacitor.
I replaced the capacitor with one from my bits box (the repair cost me Nothing)
I reassembled and the oven worked perfectly.
Again this worked for me but I dont know how long it will last. capacitors are quite intolerant devices and their values can change in time, especially in the high temparatures in the rangemaster.
Its possible that most of the failed timers could have been repaired by changing this 1 dollar item.
If changing this capacitor mark the polarity on the PCB before you unsolder it.
Polarity is clearly marked on the device with a -Ve stripe.
DO NOT solder the new capacitor in the wrong way round... it will probobly go bang!
Also please ensure you buy a 220UF electrolytic capacitor of at least 25V rating... you can probobly go higher on the voltage rating but dont go lower.
Also please ensure the temparature rating is the same, mine was rated at -55 to 125 celcius. (Hot oven)
Please only attempt this repair if you are competant to do so.
Mike
March 2011