Table Of Contents - Lexicon MPX 110 Service Manual

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