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3.11.5. There is more than one kind of Lisa Power Supply, which one do I have?

The Lisa Power Supply Unit (PSU) is one of two kinds:

Original Apple PSU aka 1.2 Amp

This PSU is identified by one of the following rating labels beside the power cord connector:

• Units configured for North America
• Part number: 620-6103
• 120 VAC, 60 Hz, 1.2 Amp, 150 W

• Units configured for outside of North America
• Part number:
• 220-240 V~, 50 Hz, .7 A, 150 W

DataPower PSU aka 1.8 Amp

This PSU is identified by the following labels:

• Units configured for North America
• Part number: 699-0189
• 120 VAC, 60 Hz, 1.8 Amp, 150 W

• Units configured for outside of North America
• Part number: 699-0190
• 220-240 V~, 50 Hz, 1 A, 150 W

Notes

• The DataPower PSU can be switched between 120V and 220V by moving some internal jumpers.
• The Apple PSU can be switched between 120V and 220V by moving an internal jumper and replacing the standby power filament transformer with one of the appropriate voltage.
• The DataPower PSU was installed in the Lisa 2/10, as the extra load of the Widget is too much for the Apple PSU.
• The DataPower PSU is generally considered much more reliable and easier to repair than the original Apple design.
• Many Lisas had their power supply upgraded to the DataPower unit.

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