Editing Amstrad CPC 664 Maintenance Guide (section)

== Power Supply ==

The CPC 664 takes '''5 V DC at 2 A''' and '''+12 V DC at &asymp;0.6 A''' through the DC cord from the matching monitor. The CTM-644 colour monitor and the GT-65 green monitor both supply both rails on a multi-pin DC plug.

Unlike the 464 (which uses a single-pin 2.1 mm DC plug), the 664 / 6128 use a '''DIN-5 power cable''' or a stereo-3.5 mm-style multi-conductor cable, depending on the monitor.

If using a third-party display, a stand-alone '''5 V/2 A + 12 V/1 A''' dual-output PSU is required. The 12 V rail powers the floppy drive motor and stepper; the system unit and the floppy drive logic both run on 5 V.