Transformer      ~     (4D +)  1      3             Vout
            --------   --------     /-------REGU---------------  +
             220VAC |  |  VAC  \   /    |   2 |      |     |
                    |  |        4D      |     |      R1    |
             -------   --------/  \   C | +   |-------     |
                   VA         ~   |   ------  R2         + |   1 æF / 40v
                                  |   ------  |         -------
            4D = diode bridge     |     | -   |         -------
            4D -,+  bridge        |     |     |          - |
                                  |     |     |            |
                                  |     |     |            |
            C= capacitor          |     |     |            |
                  ---------------------------------------------  -
                       (4D -)       |
   1 = Regulator IN                 |
   2 = Regulator ADJUST          --------
   3 = Regulator OUT              ------
                                    --