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7. COOLSCAN III LS-30 の取扱説明書・マニュアル

LS-30の取扱説明書・マニュアル [全49ページ 3.39MB]

- 22 -Setup: Connecting the SCSI CableSCSI devices are connected to the computer in a "daisy chain."Up to eight devices, including the computer and any internalSCSI devices such as hard drives and CD-ROM drives, can beconnected in a SCSI chain. The first and last devices in thechain must be terminated, i.e., fitted with special circuitry toreduce noise, making the connection more reliable. If the LS-30is the last device in the chain, it can be terminated using thetermination switch on the rear of the scanner. Except in thecase of some laptop computers requiring external terminators,the other end of the chain will be terminated inside the com-puter, either at the SCSI adapter or at an internal drive. In thecase of IBM PC/AT computers with internal SCSI devices, it maybe necessary to remove termination from the SCSI adapterboard before connecting external devices.To connect the scanner to the SCSI chain, a SCSI cable with amale half-pitch 50-pin connector is required. The other end ofthe cable must match the connector on the devices to whichthe scanner is to be connected. For direct connection to mostMacintosh computers, a 25-pin D-sub connector will be re-quired (Macintosh laptop computers use a different type ofconnector). SCSI boards for IBM PC/AT computers will usuallybe provided with a 25-pin D-sub connector, a 50-pin Centronicsconnector, or a half-pitch 50-pin connector with the pins ar-ranged in two separate rows or attached to a central "finger." Ifthe correct type of cable is not available, an adapter can beattached to one or both ends of the cable. To prevent interfer-ence, SCSI cabling should be of a high-impedance type and beas short as possible. The total length of cabling in a SCSI chainmust not exceed six meters (twenty feet), but be aware thatthe reliability of the SCSI interface will drop as the length of thecable increases.A SCSI cable is provided with scanners sold in the United Statesand Canada. If your scanner was purchased in another region,before connecting the SCSI cable you should attach the ferritecore provided with your scanner (the cable provided to cus-tomers in the United States and Canada does not require acore). Place the SCSI cable in the center of the open core andclose the core tightly. The core should be attached as far aspossible from the scanner; i.e., as close as possible to the otherdevice to which the cable is attached. Attach the plastic tie onthe scanner side of the core to prevent the core from slidingout of position.2. Place tie aroundcable and pull tight1. Close and latch coreTo LS-30

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