Lexicon MPX G2, Service Manual

Page: 57 / 165

Lexicon
5-9
When the pot labeled Low gets initially turned CCW, the display reads:
Low Pot:
Turn CCW: 62*
* 62 indicates the position of the pot under test and this value can range from 0-63. Turn the pot fully-CCW
and the display will then read:
Low Pot:
Turn Fully CW
After this pot is turned fully CW, the display reads:
Low Pot:
Pot Complete
Testing the Mid, High and Output Pots will display the same message on the lower half of the display as
shown above. When the last pot is fully tested the bottom half of the display reads:
Output pot:
Test Complete
To exit the test, press and hold down the NO< button (for about 3 seconds) until the display reads:
Diags: Tests
< Pot
LED Test
This test will verify that all of the 44 LEDs are working properly.
At the Functions Tests menu turn the Encoder until the display reads the following:
Diags: Tests
< LED
Next press the STORE button and release, the display will read the following:
LED Test CW/CCW
Hold < to exit
All Front (44) Panel LEDs should be lit at this time. The Encoder is active for testing the LEDs. When the
Encoder is turned 1 position CW, the Gain LED will only be lit. By continuing to turn the ENCODER knob
CW, each LED will light individually in a sequential manner each time the Encoder is turned.
After the last LED is tested, turning the Encoder 1 more position CW will allow no LEDs to be lit.
To exit the test, press and hold down the NO< button (for about ½ second) until the display reads:
Diags: Tests
< LED
Display Character Test
This test will verify that all the display segments are working properly.