MPX G2 Service Manual
5-16
The NO< button is active to exit the Test Menu into the Top Level Menu.
ROM Test
This test will verify the ROM’s Checksum, which is a byte size value, is located in the last location of Bank
0. The test adds the entire ROM (U93) including the Checksum byte, expecting 0 as the result.
At the Functions Tests menu turn the Encoder until the display reads the following:
Diags: Tests
< ROM Checksum
Next press the STORE button and release. After the STORE button is pressed, the test is executed and
display will read the following if the test passed:
ROM Test:
Passed (done)
If the test failed, the display reads:
ROM Test:
Failed (done)
The NO< button is active to exit the Test Menu into the Top Level Menu.
TOP LEVEL MENU UTILITIES & TOOLS
Entering the Top Level Menu allows the operator to access Utilities and Tools for troubleshooting purposes.
The Functional Tests/Extended Diagnostics are invoked by holding down the EDIT button while powering
on the unit. When the display reads:
Lexicon
Release the EDIT button. Approximately 5 seconds after the EDIT button is released, the display reads:
Diags:Tests
< Function Tests
To access the Top Level Menu upon diagnostics entry, press the NO< button, the display will then read as
follows:
Diags: Top Level
Tests >
Turning the encoder CW allows the operator to select the following Utilities & Tools:
Tests
Exit Diags
Scope Loops
Software Error Log
Clear Err Log
2186 Tools
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