Nikon LS-2000 - Manual (Page 51)

- 51 - Troubleshooting
Troubleshooting
If you should encounter problems with your scanner, check the
following before contacting your retailer or Nikon representa-
tive. If the problems occurred during scanning, you may wish to
refer to the software reference manual for advice on trouble-
shooting scanning problems.
Problem: the status LED does not light
Checklist
• Is the power switch set to ON?
The scanner is on when the end of the power switch labeled
“1” is down. See the Fast Track Guide or the “Using the
Scanner” section of this manual.
• Is the power cable properly connected at both ends?
After making sure that the scanner and any devices to which
it is connected are switched off, connect the power cable as
described in the Fast Track Guide or the “Setup” section of
this manual.
Problem: the scanner will not scan
Scanning problems are often related to a problem in the SCSI
connection or to improperly installed software. In rare situations,
there may be a problem with the system itself, in which case a
complete reinstall of the operating system may be necessary.
SCSI checklist
Before checking the items listed below, make sure that the
scanner and any devices to which it is connected are off.
• Is the SCSI cable loose or not connected?
Check the SCSI cabling to be sure that the cable is firmly
connected to the connectors.
• Are both ends of the SCSI chain terminated?
If the SCSI chain is not properly terminated, you will experi-
ence intermittent problems with all SCSI devices. The chain
must be terminated at both ends: if you have a IBM PC/AT
compatible with a SCSI expansion board and no internal
SCSI devices, check that the board is terminated (refer to
the manufacturer’s manual). If you are using an IBM PC/AT
compatible with a SCSI expansion board and internal SCSI
devices, remove termination from the board and terminate
the last internal device in the chain. If the scanner is con-
nected at the end of the chain, set the terminator switch to
ON. If the scanner is connected between other SCSI de-
vices, terminate the last device in the chain and set the
terminator switch on the scanner to OFF. If there is an
unused SCSI connector at the end of the chain, place an
independent terminator on this connector even if the device
is connected to the chain using a through terminator. See
“Setup” in this manual.
• Does the cabling total more than six meters in length?
For a reliable connection, SCSI cabling should be as short as
possible. Use short, high-impedance cables.
• Is the scanner’s ID the same as that of another SCSI device?
Each SCSI device must have a unique ID. Set the scanner’s
ID to a number not used by any other devices in the chain.
Remember that the computer is assigned an ID, usually “0”
or “7,” while internal hard disks often have IDs of “0” or “1.”
In the case of Macintosh computers, the host computer has
an ID of “7” while “0” and “3” may be assigned to an inter-
nal hard disk or CD-ROM drive.