Extended Diagnostics - Lexicon MPX 110 Service Manual

EXTENDED DIAGNOSTICS

The following tests are available in the Extended Diagnostics:
Test
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
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
O O
MSB
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.
Test Name
ROM Checksum
SRAM Test
Lexichip3 WCS
Lexichip3 Interrupt Timer
Lexichip3 Audio Data File
Encoder/Switch/LED
ADC Pot
EEPROM
MIDI
LED (for troubleshooting)
Lexichip3 External DRAM
Burn In Loop
Audio I/O
Exit Diagnostics
Initialize
Store Tap
l
O
LSB
Lexicon
Binary See
LED's Note:
0 0 0 1 1
0 0 1 0 1
0 0 1 1 1
0 1 0 0 1
0 1 0 1 1
0 1 1 0 2
0 1 1 1 3
1 0 0 0
1 0 0 1
1 0 1 0 2
1 0 1 1
1 1 0 0
1 1 0 1
1 1 1 0
1 1 1 1
5-5