Lexicon
5-5
EXTENDED DIAGNOSTICS
The following tests are available in the Extended Diagnostics:
Test
Number
Test Name Binary
LED’s
See
Note:
1 ROM Checksum 0 0 0 1 1
2 SRAM Test 0 0 1 0 1
3 Lexichip3 WCS 0 0 1 1 1
4 Lexichip3 Interrupt Timer 0 1 0 0 1
5 Lexichip3 Audio Data File 0 1 0 1 1
6 Encoder/Switch/LED 0 1 1 0 2
7 ADC Pot 0 1 1 1 3
8 EEPROM 1 0 0 0
9 MIDI 1 0 0 1
10 LED (for troubleshooting) 1 0 1 0 2
11 Lexichip3 External DRAM 1 0 1 1
12 Burn In Loop 1 1 0 0
13 Audio I/O 1 1 0 1
14 Exit Diagnostics 1 1 1 0
15 Initialize 1 1 1 1
NOTES:
1. These tests reside in the Power On Diagnostics.
2. These tests require operator interaction and judgment.
Doesn't generate any error messages.
3. This test requires operator interaction and judgment.
Generates an error message.
The Extended Diagnostics will be invoked by pressing & holding the BYPASS button while powering on the
unit. When the L & R Level (green) LED’s are lit, release the BYPASS button. After the BYPASS button is
released, the Binary LED’s (EDIT, BYPASS, STORE & TAP) will display the current position of the
VARIATION knob in binary and the Level (green) LED’s will go off.
For example, if the VARIATION knob was set to 5, the LED’s would read the following:
Edit Bypass Store Tap
O O O l
MSB LSB
When a test is selected, the STORE button must be pressed to execute it. If the test passed, the L & R
Level (green) LED’s will light. If the test failed, the L & R Clip (red) LED’s will light.
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