Lexicon MPX G2 Diagnostics Tests

Function Tests

This is an automated set of tests used by manufacturing. Runs Switch Test, the Pot Test, the LED Test, the LCD Character Test, the LCD Block Test and the burn in test. The user must press the No button to step to the next test.

Switch Test

Displays each button as it is pressed or (knobs) turned.

Pot Test

Tests the Gain pots. Displays the value as they are turned.

LED Test

Turns on each of the front panel LEDs in this order:

  1. GAIN LED
  2. FX 1 LED
  3. FX 2 LED
  4. SOFT ROW LED
  5. OPTIONS LED
  6. PROGRAM LED
  7. EDIT LED
  8. CHORUS LED
  9. DELAY LED
  10. REVERBLED
  11. EQ LED
  12. INSERT LED
  13. BYPASS LED
  14. SYSTEM LED
  15. STORE LED
  16. TEMPO LED
  17. A LED
  18. B LED

Display Char Test

Displays alphanumeric characters in each display segment. The letter changes as the knob is turned.

Display Block Test

Displays a block character that moves across the display as the knob is turned. Helps find bad pixels and other display problems.

Auto Execution

Runs the MIDI Test and the Footpedal test over and over until a button is pressed.

Burn-in Loop

Runs a series of tests over and over again while the unit is in burn in. This can be handy for checking a unit after it has been repaired in case there is any question about how stable the unit is.

Footpedal

Tests the range of the input to the footpedal jack.

MIDI

Performs a MIDI wrap around test from the OUTPUT to the INPUT.

DRAM

Performs a test of the audio DRAM memory associated with the Lexichip which is used for Delays and Reverbs.

WCS

Tests the program memory for the Lexichip.

SRAM

Tests the SRAM used by the system (stored programs, etc..)

ROM Checksum

Compares the calculated checksum of the ROM/Flash chip with the value calculated when the program version was created. This is helpful for detecting back FLASH chips.

2186 SRAM

Tests the 2186's SRAM.

2186-Lex

Tests communication between the 2186 and the Lexichip.

Sample Rate

Tests to make sure the sample rate is correct (Bob Sellon - I think).

DigiPot

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Also see..

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