Are you sure it is a U472? If so, try removing the 10C14 (UCH81) and see if the rest light up. If not, try a replacement here. It might be shorting the heater to deck. There are also a few capacitors on the heater line which cause trouble as well as L23.
Are the other valves 'U' or 'E' series. If they are 'E' series, then 'U' ones will not do in these positions.
Generally speaking, 'U' series valves are in series, so pull one and the rest should go out. 'E' series are in parallel, so lifting any one should leave the others alight.
Have you got the circuit?
Cheers,
Steve P.
Are the other valves 'U' or 'E' series. If they are 'E' series, then 'U' ones will not do in these positions.
Generally speaking, 'U' series valves are in series, so pull one and the rest should go out. 'E' series are in parallel, so lifting any one should leave the others alight.
Have you got the circuit?
Cheers,
Steve P.
If we've always had that, why is the car boot open? You aren't smuggling in another old TV are you...?
