Lexicon MPX G2 Service Manual

Lexicon
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Systems Clocks:
These procedures verify the major crystals and other clocks that are important to the operation of the MPX
G2. A frequency counter and oscilloscope are required for the following tests. The oscilloscope’s ground
lead should be connected to the digital ground Pin 16 of U93.
1. Locate Y1 just above the Lexichip-2 (U85) to the Right of the power supply. Measure the Left side of Y1
and verify a frequency of 22,5792MHz.
2. Locate Y2 just to the Left of U93 near the front of the Main board. Measure the Left side of Y2 and
verify a frequency of 16,000MHz.
3. Locate Y3 just to the Left of U95 in the upper Right hand corner of the Main board. Measure the rear of
Y3 and verify a frequency of 10,000MHz.
APPENDIX A: Software Error Messages
The following are software error messages that were created by the programmers to help find software
bugs during software development.
If a software error occurs, the appropriate error message will be displayed on the upper left corner of the
display.
Please note that the software error messages E1- E7 have no relation to the error messages that are
displayed on the 7 segment or headroom LED displays for the power on diagnostics.
E0 - No error
E1 - midi in overflow
E2 - midi out overflow
E3 - midi in frame error
E4 - too many dump bytes
E5 - incorrect num dump bytes
E6 - dump buffer full
E7 - Display timeout
E8 - midi handshake timeout error
E9 - compact data error
E10 - compact midi data error
E11 - out of range program number
E12 - prog ptr error getting prog name
E13 - prog ptr error getting large prog
E14 - prog ptr error getting small prog
E15 - prog ptr error getting prog status
E16 - prog ptr error clearing reg
E17 - prog load error: reg unassigned
E18 - prog load error: cleanup
E19 - 2186 DM overflow error
E20 - 2186 PM overflow error
E21 - 2186 INT overflow error
E22 - 2186 INT and PM overflow error
E23 - 2186 BK overflow error
E24 - 2186 INT steps overflow error
E25 - 2186 Already a FIRST error
E26 - 2186 effect order error
E27 - 2186 effect already assigned error
E28 - 2186 command clear timeout after load
E29 - 2186 command clear timeout after "prepare for load"
E30 - audio param memory error in compact
E31 - audio param memory error in "will_fit"

Lexicon MPX G2 Specifications

General

Brand	Lexicon
Model	MPX G2
Category	Recording Equipment
Language	English