Lexicon 200, Service Manual

Page: 34 / 90

MPX 200 Service Manual
5-14
Burn In Tests (16)
During the execution of the Diagnostics in the Burn In loop, the appropriate test code will be displayed on
the Diagnostic LEDs (BYPASS, STORE and TAP). This code will be sent to the LEDs before each test is
executed. By displaying a test/error code on the LEDs before the test is activated, it will be easier to
determine which test failed if the unit hangs or crashes during the Burn In loop. The test numbers and
names are also displayed on the 7-segment display, along with the Pass/fail status of each test.
Before the test is executed, the following test code will be displayed on the Diagnostic LEDs, along with the
test number on the 7-segment displays:
Test # Test Name Diagnostic LED
7-segment
display
16 Burn In EFFECTS “Hall” 16
Pressing the Load button will execute the test.
The Burn In loop will continuously run the following diagnostics:
Test # Test Name Diagnostic LED
7-segment
display
1 ROM COMPRESSOR “–20” 1
2 SRAM COMPRESSOR “–10” 2
3 WCS COMPRESSOR “–3” 3
4 INT COMPRESSOR “Threshold” 4
5 ADF EFFECTS “Eko/Dly” 5
6 EEPROM EFFECTS “Gate“ 6
7 DRAM EFFECTS “Chamber” 7
When the test is executed, the 7-segment displays will indicate that the test is “Running…”, followed by the
Pass/fail status of the test.
If the test passed, the (Green) LEVEL -30dB LEDs will light.
If the test failed, the (Red) LEVEL LEDs will light.
There are two options available when a test has failed during the Burn In loop:
1. Press the Bypass button to continue the Burn-in loop.
2. Press the Tap/Cancel button to run the failed test continuously.