lexicon_960l_sm电路图.pdf

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1、960L Multi-Channel Digital Effects System Service Manual RadioFans.CN 收音机爱 好者资料库 960L Multi- Channel Digital Effects System 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

2、 Part # 070- 14826 Rev 0 Printed in the United States of America RadioFans.CN 收音机爱 好者资料库 960L Multi- Channel Digital Effects System Service Manual RadioFans.CN 收音机爱 好者资料库 960L Multi- Channel Digital Effects System Service Manual Lexicon Table of Contents Chapter 1 Reference Documents, Required Equip

3、ment.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 960L Mainframe. 3- 1 LARC2 User Interface . 3-

4、3 Chapter 4 Performance Verification.4- 1 Initial Inspection and checkout: . 4- 1 960L Mainframe:. 4- 1 LARC2 controller:. 4- 1 Cables:. 4- 1 Power Supplies:. 4- 1 Audio/Functional Tests Setup*: . 4- 5 I/O Gain Tests . 4- 6 Analog In to Analog Out Audio Gain Test:. 4- 6 Analog In To Digital Out Audi

5、o Gain Test:. 4- 6 Digital Input to Analog Output Gain Test:. 4- 6 Frequency Response: . 4- 6 Analog In to Analog Out Frequency Response Test:. 4- 6 Analog In To Digital Out Frequency Response Test:. 4- 6 Digital In To Analog Out Frequency Response Test:. 4- 7 THD+N Measurement:. 4- 7 Analog In to A

6、nalog Out THD+N Test:. 4- 7 Analog In to Digital Out THD+N Test:. 4- 7 Digital In to Analog Out THD+N Test:. 4- 7 Crosstalk Tests:. 4- 8 Analog In to Digital Out Crosstalk Test:. 4- 8 Digital In to Analog Out Crosstalk Test:. 4- 8 Dynamic Range Tests:. 4- 8 Analog In to Analog Out Dynamic Range Test

7、: . 4- 8 Analog In to Digital Out Dynamic Range Test:. 4- 8 Digital In To Analog Out Dynamic Range Test: . 4- 8 Functional Tests:. 4- 9 Midi Tests:. 4- 9 Listening Test:. 4- 9 Lexicon Audio Precision ATE Summary . 4- 11 Chapter 5 Service Notes.5- 1 Motherboard - lithium battery. 5- 1 Power Supplies.

8、 5- 1 Symptoms of possible power supply failures. 5- 1 Larc2 Meter Display LED Handling . 5- 1 Removal and Replacement of Larc2 Piezo Transducer. 5- 1 For units with the transducer soldered (Rev 5 PCB and up):. 5- 1 For units with the transducer epoxied (Rev 4 PCB and below):. 5- 1 Female RS- 422 Wr

9、aparound Plug: . 5- 3 Male RS- 422 Wraparound Plug. 5- 4 960L Multi- Channel Digital Effects System Service Manual Chapter 6 Troubleshooting.6- 1 Diagnostics.6- 1 Overview.6- 1 960L Diagnostics:.6- 1 960L Diagnostic User Interface: .6- 2 Audio I/O Algorithm (8 In - 8 Out): .6- 3 Functional Diagnosti

10、c Test Scripts .6- 3 960L Setup for Functional Diagnostic Tests.6- 4 960L Power On Diagnostic Descriptions: .6- 4 960L Functional Diagnostic Descriptions:.6- 5 960L Troubleshooting Tools: .6- 16 Global Commands:.6- 17 LISTING of RESIDENT SCRIPTS.6- 18 LARC2 DIAGNOSTICS.6- 24 Debug Port:.6- 25 POWER

11、ON DIAGNOSTICS:.6- 26 Power On Diagnostics Sequence:.6- 26 Power On Self Tests:.6- 28 INTERACTIVE DIAGNOSTICS:.6- 33 Self Test:.6- 34 LCD Test:.6- 35 Key Test:.6- 35 LED Test:.6- 36 Joystick Test:.6- 38 Fader/Motor Test:.6- 39 Lexicon Test: .6- 39 Memory Test:.6- 40 Repetitive Test:.6- 40 Diagnostic

12、s Suite:.6- 41 OPTION BOARD Menu:.6- 42 MISCELLANEOUS TESTS:.6- 44 Program Flash Data Checking:.6- 46 Chapter 7 Theory of Operation.7- 1 NLX Backplane.7- 1 Overview.7- 1 Circuit Description.7- 1 NLX Interface (Sheet1).7- 2 PCI Interface (Sheets 2, 3, 4) .7- 2 IO Connectors (Sheet 5).7- 2 Miscellaneo

13、us Connectors (Sheet 6).7- 2 IOBUS Fax: 781- 280- 0499; email: ATTN: Customer Service Returning Units to Lexicon for Service Before returning a unit for warranty or non-warranty service, consult with Lexicon Customer Service to determine the extent of the problem and to obtain Return Authorization.

14、No equipment will be accepted without Return Authorization from Lexicon. If Lexicon recommends that a 960L 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

15、 in or out of warranty. All shipments must be well packed (using the original packing materials if possible), properly insured and consigned, prepaid, to a reliable shipping agent. When returning a unit for service, please include the following information: Name Company Name Street Address City, Sta

16、te, Zip Code, Country Telephone number (including area code and country code where applicable) Serial Number of the unit Description of the problem Preferred method of return shipment Return Authorization #, on both the inside and outside of the package Please enclose a brief note describing any conversations with Lexicon personnel (indicate the name of the person at Lexicon) a