23-10-2017, 09:57 AM
(22-10-2017, 05:12 PM)Bonky Wrote: Voltages on the collectors of Tr1 to 4
There are no voltages (!) except on TR1 (On another board) where it reads 1.27V
I think that would be a very good reason that it isn't working - don't you?
There are two options: either there is no supply to that part of the set or there is a dead short across the supply rail.
(22-10-2017, 05:12 PM)Bonky Wrote: The HT line on the 502 board should read 9V. It reads 2.23VThis suggests that the fault is a short but as I don't have circuit to hand I can't comment in any more detail.
