Troubleshooting Guide - Newport LDC-3706 Series User Manual

Troubleshooting Guide

This section lists some common problems and corrective actions. In the event that the
corrective action does not resolve problem; please contact ILX Lightwave.
For a comprehensive list of frequently asked questions, see the ILX Lightwave website or
contact ILX Lightwave Customer Service (see Comments, Suggestions, and Problems on page
ix for contact information).
SYMPTOM
GENERAL
The instrument does not power up
The instrument reads "Internal
Communication Error"
Slow or unexpected response to remote
commands
The LDC-3706 instrument is not being
recognized by USB
December 2019
CORRECTIVE ACTION
Check the power cord to make sure that it is securely
connected and check the wall outlet by connecting to a
known operational device.
Check the rear panel voltage selector to match your current
region supply. Using the incorrect setting will damage the
instrument.
There are no user-serviceable fuses on this device, but
there are several internal fuses. Contact customer support
at ILX Lightwave.
Error code 516 is the internal communication error indication
that the LDC-3706 instrument is not functioning correctly.
The instrument must be returned to ILX Lightwave if this
error occurs.
Check that no two devices are set to the same GPIB
address.
Make sure that there are less than 15 devices on the bus.
Check the configuration of the GPIB controller card or COM
port. Specifically note the information regarding the
terminating character.
Check that total GPIB cable length is less than 20 meters
(65 feet).
Remove all other instruments from the bus to isolate the
LDC-3706. If this corrects the problem, re-connect one
instrument at a time until the problem returns. Then check
the other instrument for address conflicts and proper GPIB
function.
Check the USB cable connection between the LDC-3706
and the computer. Ensure proper drivers are installed.
91 LDC-3706 Series Laser Controller