lexicon mpx500Servicemanual电路图.pdf

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1、MPX 500 24-Bit Dual Channel Processor Service Manual RadioFans.CN 收音机爱 好者资料库 MPX 500 Service Manual Copyright 1999 Lexicon, Inc. All Rights Reserved Lexicon Inc. 3 Oak Park Bedford, MA 01730-1441 Tel (781) 280-0300 Customer Service Fax (781) 280-0499 Lexicon Part # 070-14399 Rev 0 Printed in the Uni

2、ted States of America RadioFans.CN 收音机爱 好者资料库 MPX 500 Service Manual RadioFans.CN 收音机爱 好者资料库 MPX 500 Service Manual Lexicon 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 Inform

3、ation.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 Diagnostics:. 4-1 Setup:. 4-1 I/O Tests:. 4-1 Analog In To Analog Out Level Test:. 4-1 Frequency Response Test: . 4-1 Analog In To

4、Analog Out Frequency Test:. 4-1 THD+N Test: . 4-2 Analog In To Analog Out THD+N Test:. 4-2 Crosstalk Tests:. 4-2 Analog In To Analog Out Crosstalk Test:. 4-2 Dynamic Range Tests:. 4-2 Analog In To Analog Out Dynamic Range Test:. 4-2 Digital I/O Functionality. 4-2 MIDI Functionality:. 4-3 Footswitch

5、Functionality: . 4-3 Listening Test:. 4-4 Setup. 4-4 Verify Clean Audio. 4-4 Shock Test. 4-4 Lexicon Audio Precision ATE Summary . 4-5 Chapter 5 Troubleshooting.5-1 Check the Lexicon web site for the latest software and information:. 5-1 Diagnostics. 5-1 Power Up Diagnostics. 5-1 Error Indication. 5

6、-1 Test Descriptions. 5-2 #1 ROM Test :. 5-2 #2 SRAM Test:. 5-2 #3 WCS Test:. 5-2 #4 INT Test:. 5-2 #5 ADF Test:. 5-2 #6 EEPROM Test:. 5-2 Extended Diagnostics. 5-3 #1 ROM Test :. 5-4 #2 SRAM Test:. 5-4 #3 WCS Test:. 5-5 #4 INT Test:. 5-5 #5 ADF Test:. 5-5 #6 EEPROM Test:. 5-5 #7 DRAM Test:. 5-5 #8

7、Switch Test:. 5-5 MPX 500 Service Manual Footswitches:.5-5 Front Panel Switches: .5-6 #9 Encoder Test:.5-6 #10 MIDI Test:.5-7 #11 LCD Test:.5-7 #12 Exit Test:.5-7 #13 Initialize Test:.5-7 #14 Unused:.5-7 #15 Unused:.5-7 #16 Burn In Test:.5-7 General Troubleshooting and Service Notes.5-8 Power Supply

8、.5-8 Front Panel Knobs.5-8 Lexichip Replacement .5-8 Chapter 6 Theory of Operation.6-1 Schematic walkthrough .6-1 Sheet 1 (INPUT).6-1 Sheet 2 (DAC) .6-1 Sheet 3 (LEXICHIP3, ROM/RAM, uPROC).6-1 Sheet 4 (ENCODERS).6-2 Sheet 5 (MIDI, DIGITAL AUDIO OUT).6-2 Sheet 6 (DISPLAY DRIVER) .6-3 Sheet 7 (POWER S

9、UPPLY) .6-3 Additional Sheets 1 each (SW#1, SW#2).6-3 Chapter 7 - Parts List.7-1 Chapter 8 Schematics and Drawings .8-1 Lexicon 1-1 Chapter 1 Reference Documents, Required Equipment Reference Documents MPX 500 User Guide - Lexicon P/N 070-14116 or latest revision Required Equipment Tools The followi

10、ng is a minimum suggested technicians tool kit required for performing disassembly, assembly and repairs: Clean, antistatic, well lit work area. (1) #1 Phillips tip screwdriver (1) T9 Torx screwdriver (1) 3/16 Hex socket nut driver (1) 5/16 Hex socket, full hollow, nut driver with plastic insert (to

11、 prevent Front Panel scratches) (1) 15mm Hex socket nut driver Solder: 63/37 - Tin/Lead Alloy composition, low residue, no-clean solder. Magnification glasses and lamps SMT Soldering / Desoldering bench-top repair station Test Equipment The following is a minimum suggested equipment list required to

12、 perform the proof of performance tests. Amplifier with speakers or headphones. Cables: (dependent on your signal source) Audio Input cable (balanced) with shield and a XLR or “ plug on one end and an appropriate connector on the opposite end for connection to the Low Distortion Oscillator. Audio Ou

13、tput cable (balanced) with shield and a XLR or “ plug on one end and an appropriate connector on the opposite end for connection to the Distortion Analyzer. (1) MPX 500 Power Cord (choose accordingly): CORD,POWER,NA/IEC,SVT,VW-1,10A, N. AMERLexicon P/N 680-09149 CORD,POWER,IEC, 6A, 2M, EURO Lexicon

14、P/N 680-08830 CORD,POWER,IEC, 5A, 2M, UKLexicon P/N 680-10093 CORD,POWER,IEC, 6A, 2M, ITALY Lexicon P/N 680-10094 CORD,POWER,IEC, 6A, 2M, SWISS Lexicon P/N 680-10095 CORD,POWER,IEC, 6A, 2M, AUSTRALIA Lexicon P/N 680-10096 CORD,POWER,IEC, 6A, 2M, JAPANLexicon P/N 680-10097 CORD,POWER,IEC, 6A, 2M, UNI

15、VERSALLexicon P/N 680-10098 (1) Low Distortion Oscillator with Single-ended or balanced output , 100 ohms output impedance, 0.005% THD. (1) analog Distortion Analyzer and Level Meter with single-ended or balanced input, switchable 30Hz highpass filter or audio bandpass (20-20kHz) filter (1) 100 MHz

16、oscilloscope Lexicon 2-1 Chapter 2 General Information Periodic Maintenance Under normal conditions the MPX 500 requires minimal maintenance. Use a soft, lint-free cloth slightly dampened with warm water and mild detergent to clean the exterior surfaces of the connector box. Do not use alcohol, benz

17、ene or acetone-based cleaners or any strong commercial cleaners. Avoid using abrasive materials such as steel wool or metal polish. It the unit is exposed to a dusty environment, a vacuum or low-pressure blower may be used to remove dust from the units exterior. Ordering Parts When ordering parts, i

18、dentify each part by type, price and Lexicon Part Number. Replacement parts can be ordered from: LEXICON, INC. 3 Oak Park Bedford, MA 01730-1441 Telephone: 781-280-0300; Fax: 781-280-0499; email: ATTN: Customer Service Returning Units to Lexicon for Service Before returning a unit for warranty or no

19、n-warranty service, consult with Lexicon Customer Service to determine the extent of the problem and to obtain Return Authorization. No equipment will be accepted without Return Authorization from Lexicon. If Lexicon recommends that a MPX 500 be returned for repair and you choose to return the unit to Lexicon for service, Lexicon assumes no responsibility for the unit in shipment from the customer to the factory, whether the unit is in or out of warranty. All shipments must be well packe