19-05-2015, 04:52 PM
That's for tomorrow then, I will check around TR82 and those resistors.
Discovered that it was the 14v rail to 110/36 which was pulling low.
Thats the supply for the trigger and bistables TR2,3,4,5.
So I bit the bullet and removed the time base switch assembly labeling all the wires first as it is the only way to get at this part of the board. There are only 20 odd!
Checked TR1 to 4, all seem OK. So assuming something is drawing too much from this supply I will have to lengthen all the leads and reconnect the timebase switch out of the case so I can dynamically check further.
If all else fails I will measure the voltages around TR1 to 5.
It gets no better!
Discovered that it was the 14v rail to 110/36 which was pulling low.
Thats the supply for the trigger and bistables TR2,3,4,5.
So I bit the bullet and removed the time base switch assembly labeling all the wires first as it is the only way to get at this part of the board. There are only 20 odd!
Checked TR1 to 4, all seem OK. So assuming something is drawing too much from this supply I will have to lengthen all the leads and reconnect the timebase switch out of the case so I can dynamically check further.
If all else fails I will measure the voltages around TR1 to 5.
It gets no better!
Boater Sam.
