Lenovo USB 2.0 CD-RW/DVD-ROM Combo II Drive - Manual (Page 17)

Configuration 1: self power (AC adapter) configuration
The Combo II Drive is usually used with the self power (AC adapter)
configuration.
Requirements
v Standard USB cable (shipped with this option); Part Number 40Y8704
v AC adapter (shipped with this option)
Specifications
Reading DVD media and reading and writing CD media are supported.
Connecting the Combo II Drive using configuration 1
Attention: If you are booting from the USB 2.0 CD-RW/DVD-ROM
Combo II drive, then the AC power adapter should be attached to the
USB 2.0 CD-RW/DVD-ROM Combo II drive prior to booting.
To connect the Combo II Drive to your system, complete the following procedure.
Refer to Figure 1-1 during installation.
1. Turn on your computer.
2. Insert the cable plug 1 into the USB connector of the drive.
3. Plug the standard USB connector 2 into the USB port of your computer.
4. Connect the AC adapter to the DC IN connector 3 on the Combo II Drive.
Figure 1-1. Configuration 1: self power (AC adapter) configuration
Chapter 1. Combo II Drive quick install 1-3