Lexicon MPX 110 - Table of Contents

MPX 110 Service Manual
Table of Contents
Chapter 1 Reference Documents, Required Equipment..............................1-1
Reference Documents.....................................................................................................................1-1
Required Equipment........................................................................................................................1-1
Tools...........................................................................................................................................1-1
Test Equipment ...........................................................................................................................1-1
Chapter 2 General Information......................................................................2-1
Periodic Maintenance......................................................................................................................2-1
Ordering Parts.................................................................................................................................2-1
Returning Units to Lexicon for Service..............................................................................................2-1
Chapter 3 Specifications ................................................................................3-1
Chapter 4 Performance Verification...............................................................4-1
Functional Tests..............................................................................................................................4-1
Initial Inspection...........................................................................................................................4-1
power supply...............................................................................................................................4-1
Power up.....................................................................................................................................4-1
Setup..........................................................................................................................................4-1
Encoder Test...............................................................................................................................4-2
Switch/LED Test..........................................................................................................................4-2
ACD Pot Test ..............................................................................................................................4-2
midi wraparound test....................................................................................................................4-2
listening test................................................................................................................................4-3
Effects listening test.....................................................................................................................4-3
shock test ...................................................................................................................................4-3
Audio Performance:.........................................................................................................................4-3
setup...........................................................................................................................................4-3
gain test......................................................................................................................................4-4
signal-to-noise test.......................................................................................................................4-4
thd+n..........................................................................................................................................4-4
frequency response test...............................................................................................................4-4
Lexicon Audio Precision ATE Summary.........................................................................................4-5
Chapter 5 Troubleshooting.............................................................................5-1
Diagnostics.....................................................................................................................................5-1
Introduction .................................................................................................................................5-1
DIAGNOSTICS TEST DESCRIPTIONS ........................................................................................5-1
Power On Diagnostics..................................................................................................................5-1
Diagnostic Failures ......................................................................................................................5-2
ROM Checksum Test (1)..............................................................................................................5-2
SRAM Test (2).............................................................................................................................5-2
Lexichip3 WCS Test (3)................................................................................................................5-3
Lexichip3 Interrupt Timer Test (4)..................................................................................................5-3
Lexichip3 Audio Data File Test (5).................................................................................................5-4
EEPROM Checksum (8)...............................................................................................................5-4
EXTENDED DIAGNOSTICS ............................................................................................................5-5
ROM Checksum Test (1)..............................................................................................................5-6
SRAM Test (2).............................................................................................................................5-7
Lexichip3 WCS Test (3)................................................................................................................5-7
Lexichip3 Interrupt Timer Test (4)..................................................................................................5-8
Lexichip3 Audio Data File Test (5).................................................................................................5-8
Encoder/Switch/LED Test (6)........................................................................................................5-9