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PC Hardware in a Nutshell, 3rd Edition
book

PC Hardware in a Nutshell, 3rd Edition

by Robert Bruce Thompson, Barbara Fritchman Thompson
July 2003
Beginner to intermediate content levelBeginner to intermediate
874 pages
38h 13m
English
O'Reilly Media, Inc.
Content preview from PC Hardware in a Nutshell, 3rd Edition

Power-Supply-to-Device Connectors

Power supplies provide two types of connectors to power disk drives and other internal peripherals:

Peripheral Connector

The Peripheral Connector, shown in Figure 26-2, is often called a Molex Connector by technicians. The cable uses a Molex PS-8981-04P or AMP 1-480424-0 connector or equivalent, and 18 AWG wires. Pin 1, at left as you view the connector face, carries +12V and uses a yellow wire. Pins 2 and 3 are COM (ground) and use black wires. Pin 4 is +5V and uses a red wire.

Peripheral Connector

Figure 26-2. Peripheral Connector

Floppy Drive Connector

The Floppy Drive Connector, shown in Figure 26-3, is often called a Berg Connector, and is also used by some other types of drives (5.25-inch floppy drives use the larger Molex connector also used by hard disks and other drives). The cable uses an AMP 171822-4 connector or equivalent. The wires are 20 AWG. Pin 1, at left as you view the connector face, carries +5V and uses a red wire. Pins 2 and 3 are COM (ground) and use black wires. Pin 4 is +12V and uses a yellow wire.

Floppy Drive Connector

Figure 26-3. Floppy Drive Connector

Warning

Note that wire colors map to the same voltages on the Peripheral Connector and the Floppy Drive Connector, but the pinouts are exactly reversed. While building a home-made cable, we once toasted a drive by assuming ...

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Publisher Resources

ISBN: 059600513XErrata Page