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SECTION FOUR — Troubleshooting and servicing the
PAGE 26 491 INSTALLATION MANUAL Revision A
Returning a
491 for service
If you have overnight or second-day shipping requirements, before ship-
ping the 491, please call Northstar for turnaround time, freight charges,
and payment arrangements.
The 491 should be shipped only in a properly designed carton with pack-
ing material. Shipments to the Northstar factory should be made to the
following address:
Northstar
Service Department
30 Sudbury Road
Acton, MA 01720 USA
Before returning the 491
to the factory, to prevent
delays it is critical that
y
ou first obtain a Return
Materials Authorization
(RMA) number from the
Northstar Service
Department. If the 491
was purchased through a
dealer, call the dealer
with the 491 serial
number so they can help
y
ou get an RMA number.
The 491’s serial number
can be found on the label
at the top of the 491.
Shipments without a
proper RMA number will
not be accepted!
NOTE:
Return the transducer to its manufacturer, not to
Northstar.