ok I did that on both plugs.
First plug with red wires, put the two prongs into the either hole where each of the red wires goes to. Got nothing.
Next did the orange wired plug, put the black in the middles and used the red prong in either of the other holes side by side of the centre. Nothing on the meter!
Right, we are almost there RG, Take your time and be safe !!!
With those two plugs still un-plugged out from the PCB and with your meter on the highest AC range and the mains switched on.
Connect the black probe of your meter to the white wire on the rear voltage selector beside the incoming blue neutral wire then test both of those black wire solder connections on the front rocker switch, flip the switch if need be, you got to be reading 240VAC on
both of those black wires on the switch.
If so, with the power still on, go back and test the two red wires again on that plug disconnected from the PCB, any way around with your meter probes will do.
Also, with the power still on, test the orange wires as before, with the plug disconnected from the PCB, the black meter probe to the middle orange wire and the red meter probe to the outer orange wires seperately and tell us what you got ?
Here's a drawing that may help you understand more clearly what I mean, sorry if its a little bit rough and ready
*** Edit ***More info ***
Hey RG I found this on https://music-electronics-forum.com/showthread.php?t=47870
It looks about right to me for the secondary output voltages of what that transformer should be around.
The secondary specs for the 70529303 are:
Sec 1 322 vac @ .041 amps
Sec 2 41.9 vac CT @ .403
Meaning; the voltage across the two reds should be about, 322 VAC
and the voltage across the two outer oranges about, 42 VAC
and with the orange center tap in the middle, 21 - 0.4 - 21 VAC
My hand drawn voltage values were only a guestimate on the drawing attachment,
Hope thats of any help, Let us know what you get.
Take your time, don't panic and be safe !!!!