They are identical in concept to the mods listed by Apple.For 50/60 Hz conversion in this area of the circuit.

Step 1) Cut all foils to/from the following pins:

B10-03 (Top)

B10-06

E01-01

E01-02 (Top)

E01-03

Step 2) Connect the following jumpers using #30 wire:

FROM ----> TO

D12-11 ---> B10-03

E01-01 ---> B10-06

D11-14 ---> E01-02

E01-02 ---> E01-03