Lexicon 200, Service Manual

Page: 25 / 90

Lexicon
5-5
EXTENDED DIAGNOSTICS
The following tests are available in the Extended Diagnostics:
Test # Test Name Diagnostic LED
7 Segment
LED Display
Note:
1 ROM Checksum COMPRESSOR “–20dB” 1 1
2 SRAM COMPRESSOR “–10dB” 2 1
3 LEXICHIP3 WCS COMPRESSOR “–3dB” 3 1
4 LEXICHIP3 INT COMPRESSOR “Threshold” 4 1
5 LEXICHIP3 ADF EFFECTS “Echo/Delay” 5 1
6 EEPROM EFFECTS “Gate“ 6 1
7 DRAM EFFECTS “Chamber” 7 3
8 Switch EFFECTS “Compressor” 8 2
9 Encoder EFFECTS “Rotry/Trmlo” 9 3
10 MIDI EFFECTS “Flange” 10 3
11 LED EFFECTS “Room” 11 2
12 Exit EFFECTS “Plate” 12
13 Initialize EFFECTS “Pitch/Detune” 13
14 Unused EFFECTS “Chorus” 14
15 Unused EFFECTS “Ambience” 15
16 Burn In EFFECTS “Hall” 16 3
LED Off = 0, LED On = 1
Note 1: These tests reside in the POST.
Note 2: These tests require operator interaction and judgment, and do not generate an error message.
Note 3: These tests require operator interaction and judgment, and generate an error message.
The Extended Diagnostics are invoked by pressing and holding the Bypass button while powering on the
unit, then releasing the Bypass button once the Green LEVEL -30dB LEDs have lit. After the Bypass button
is released, the 7-segment displays as well as the Diagnostic LEDs will indicate the test number selected,
and the remaining LEDs will shut off.
For example, when the Lexichip3 ADF Test (5) is selected using the Encoder, the EFFECTS “Echo/Delay”
Diagnostic LEDs will be lit. This is useful for debugging the unit should any of the 7-segment displays
become inoperative.
When a test has been selected, the Load button must be pressed to execute it.
The leftmost 7-segment display is used to indicate the following:
“r” indicates when the test is running
“P” indicates when the test has passed
“F” indicates when the test has failed.
“d” indicates when the test is done.
NOTE: For tests that require operator interaction and judgment, the 7-segment displays will not indicate
when tests are running, or the pass/fail status of the test. For these tests, a “d” is placed in leftmost 7-
segment display to indicate when the tests has been exited and the test is done.
The Diagnostic LEDs are also used to indicate the test pass/fail status as follows: