These modifications change the character timing of the Apple from European characteristics at 50 Hz to North American standards at 60 Hz. It also ensures that the internal clock signals and the signals on the peripheral connectors are correct.

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

• D11-03
• D12-03
• D12-06
• D14-03
• D14-04 (Top and Bottom)
• A14-04
• A14-08
• A14-09
• A14-10
• B12-13
• A09-08
• A13-09 (Top)
• A13-13 (Top)
• A11-01

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

• FROM -----> TO
• D11-01 ---> D11-03
• D12-03 ---> D12-06
• D13-01 ---> D13-05
• D14-01 ---> A14-09
• B14-01 ---> A14-09
• A14-08 ---> B12-13
• A13-09 ---> A11-03
• A11-01 ---> B14-03
• A13-13 ---> B14-06
• D12-01 ---> D12-03
• D12-03 ---> D12-08
• D14-01 ---> D14-07
• D14-04 ---> D14-05
• A13-12 ---> A14-10
• A13-08 ---> B13-04
• A14-04 ---> B14-07
• A11-02 ---> B12-07
• D13-12 ---> B12-05