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Page 5-12 400 SERIES MAINTENANCE MANUAL
Rev. C P/N 190-00140-05
5.7 TEST PROCEDURES
5.7.1 Test Mode
In order to perform certain tests in the following section, the GNS 430 must be put into test mode,
which allows access to the Test Pages (Figure 5-4). To put the unit in the test mode, ground Test
Pin (J1-76) and turn the unit on. When in test mode, specific test pages can be selected by
ensuring the cursor is off and turning the small right knob.
Do not make changes on the test pages other than those required
to perform the tests listed in this manual.
Follow these steps to change data on a Test Page:
1. Press the small right knob (labeled CRSR) to turn the cursor on.
2. Turn the large right knob to change data between data fields.
3. Turn the large or small right knob to change a field that the cursor is on.
4. Once you have made the desired selection, press the ENT key to accept the entry.