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MPX 110
Service Manual
Page 49 (Chapter 8 Schematics and Drawings)
Lexicon MPX 110 - Chapter 8 Schematics and Drawings; Schematics; Drawings:
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Lexicon
8-1
Chapter 8
Schematics and Drawings
Schematics:
060-14569
SCHEM
,MAIN BD,MPX110
Drawings:
COMPONENT LAYOUT, MAIN BD
,MPX110
080-14958
ASSY DWG
,SHIPMENT,MPX110
080-14959
ASSY DWG
,CHASSIS,MPX110
48
50
Table of Contents
Main Page
Default Chapter
3
Safety Suggestions
3
Table of Contents
5
Chapter 1 Reference Documents, Required Equipment
7
Reference Documents
7
Required Equipment
7
Tools
7
Test Equipment
7
Chapter 2 General Information
9
Periodic Maintenance
9
Ordering Parts
9
Returning Units to Lexicon for Service
9
Chapter 3 Specifications
11
Chapter 4 Performance Verification
13
Functional Tests
13
Initial Inspection
13
Power Supply
13
Power up
13
Setup
13
Encoder Test
14
Switch/Led Test
14
ACD Pot Test
14
MIDI Wraparound Test
14
Listening Test
15
Effects Listening Test
15
Shock Test
15
Audio Performance
15
Setup
15
Gain Test
16
Signal-To-Noise Test
16
Thd+N
16
Frequency Response Test
16
Lexicon Audio Precision ATE Summary
17
Chapter 5 Troubleshooting
19
Diagnostics
19
Introduction
19
Diagnostics Test Descriptions
19
Power on Diagnostics
19
Diagnostic Failures
20
ROM Checksum Test (1)
20
SRAM Test (2)
20
Lexichip3 WCS Test (3)
21
Lexichip3 Interrupt Timer Test (4)
21
Lexichip3 Audio Data File Test (5)
22
EEPROM Checksum (8)
22
Extended Diagnostics
23
ROM Checksum Test (1)
24
SRAM Test (2)
25
Lexichip3 WCS Test (3)
25
Lexichip3 Interrupt Timer Test (4)
26
Lexichip3 Audio Data File Test (5)
26
Encoder/Switch/Led Test (6)
27
ADC Pot Test (7)
29
EEPROM Checksum (8)
30
MIDI Tests (9)
31
LED Test (10)
32
Lexichip3 External DRAM Test (11)
32
Burn in Loop (12)
33
Audio I/O (13)
34
Exit Diagnostics (14)
34
Initialize (15)
34
Restoring Factory Settings
34
Disassembly/Reassembly
35
Disassemby
35
Reassembly
35
Removal and Installation of Components
35
Chapter 6 Theory of Operation
37
Sheet 1
37
Input Stage
37
Output Stage
37
Sheet 2
38
Single-Ended to Differential Converter
38
Ak4528 Codec
38
Differential to Single-Ended Output Amplifiers
39
Sheet 3
39
L3 Initialization
39
Audio Memory
40
Master Clock Generator
40
I/O
40
Seeprom
40
Z80 Memory Management
41
Clocks
41
Dsp
41
Z80 Reset
41
Encoders
42
Sheet 6
42
Control Input (IAD)
42
Sheet 7
42
Footswitch
42
Led/Switch Matrix
42
Sheet 8
43
Power Fail/Reset
43
MIDI I/O
43
S/PDIF out
43
Chapter 7 Parts List
45
Mpx110 Main Board Assembly
45
Mpx110 Mechanical Assembly
46
Mpx110 Ship/Packaging Material
47
Mpx110 Transformer Options
47
Chapter 8 Schematics and Drawings
49
Schematics
49
Drawings:
49
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