Insignia DUAL BEAM 250DX - Manual (Page 26)

Reset. With the many User Options available to
customize the 250DX, it is easy to configure the unit
in such a way that it is detrimental to a particular
use. By using the Reset function, all variable or user-
controlled features (except Filter) of the 250DX are
returned to the factory settings.
The Reset function is an important first step in troubleshooting problems to
ensure that a user selected setting is not the cause for the perceived
problem.
USING THE DIAGNOSTIC FEATURE
The 250DX contains a powerful diagnostic tool that can aid in determining
the cause of a problem.
To use the Diagnostic feature, select the Diagnostic feature on the start-up
menu on the initial screen. Diagnostic can also be accessed through the
Options menu.
Self Test. Initially, the 250DX will perform a self-test.
This test confirms the operation of all internal circuitry.
At the conclusion of the test, one of two messages will
appear. PASSED indicates the internal test discovered
no failures, FAILED indicates a significant internal
problem was discovered and the unit requires factory
service. A code number appears that tells repair
personnel where the problem is.
Transducer Connection. The first connection tested is
Transducer input. If a transducer is detected, the
message CONNECTED appears. If a series of dashed
lines is shown, no transducer is connected or there is
a problem with the transducer or cable.
If you are using multiple transducers, switch between
transducers to confirm the connections for each.
24
ADVANCED FEATURES
USING DIAGNOSTIC