Quote:
Originally Posted by DMcMahon
6. Schematic shows capacitor C5 0.01uF connected across transformer taps 12 and 11. There is no C5 fitted. Tap 12 connects out to Board 1 to a 1.0uF capacitor (maybe tag 28 ?) on input side of 100k resistor R104. This capacitor (probably C104) is not shown on the schematic but is listed in the parts list (there are two 1.0uF capacitors in this circuit) and is part of the scope calibration circuit.
|
Rechecked 6 above and transformer tap 12 does connect to Board 1 tag 28 as previously thought. The connection shown on the schematic from Board 1 tag 28 to Board 2 tag 29 does not exist in my scope.
This means the AC supply to the scope calibration circuit is actually taken from one end of the transformer 155 volt winding (tap 12) as against one end of the 46 volt winding (tap 13) as shown on the schematic, for reasons unknown.