QSC-PowerLight3-pwr-sm维修电路原理图.pdf

Technical Service Manual PowerLight3 Series PL325 PL340 PL380 *TD-000274-00* *TD-000274-00* Rev. A QSC Audio Products, LLC Costa Mesa, CA 92626 USA RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 PL3 Series Service Manual1 TD-000274-00 Rev. A QSC Audio Products, LLC Technical Services Group Phone:1-800 QSC AUDIO (1-800-772-2834) USA only +1 (714) 957-7150 Fax:+1 (714) 754-6173 Postal:1665 MacArthur Blvd. Costa Mesa, California 92626 USA E-mail:tech_ Web: (product information and support) (parts and accessory sales) PL325 PL340 PL380 PowerLight 3 Series Technical Service Manual Copyright 2008 QSC Audio Products, Inc. All rights reserved. RadioFans.CN 收音机爱 好者资料库 2QSC Audio Products, LLC PL325 and PL340 amplifier, rear view PL380 amplifier, rear view RadioFans.CN 收音机爱 好者资料库 PL3 Series Service Manual3 TD-000274-00 Rev. A Table of Contents Tables and Figures.4 Specifications.6 1. Introduction.7 1.1 Restriction of Hazardous Substances Directive (RoHS). 7 1.2 Service bulletins and updates. 7 1.3 The well-equipped service bench . 7 1.4 Working with surface-mount components. 8 1.5 PL380 Service Fixture . 10 2. Technical Descriptions and Testing .14 2.1 PL380 Circuit Description . 14 2.2 PL380 Major Circuit Blocks . 16 2.3 PL380 Test Procedure . 21 2.4 PL340 Test and Calibration Procedure . 24 2.5 PL325 Test and Calibration Procedure . 27 3. Troubleshooting.31 3.1 PL380: Symptoms, causes, and remedies. 31 3.2 PL325 and PL340: Symptoms, causes, and remedies. 39 PLC Power Supply Restoration Kit . 43 4. Printed Circuit Boards.53 4.1 PL325 and PL340 Amplifier . 53 Main module circuit board assembly . 53 Input module circuit board assembly . 56 4.2 PL380 Amplifier . 58 Main module circuit board assembly . 58 5. Schematic Diagrams .64 5.1 PL325 Schematics . 64 5.2 PL340 Schematics . 72 5.3 PL380 Schematics . 80 6. Replacement parts.89 6.1 Semiconductor package descriptions and pinouts . 89 6.2 PL325 parts and assemblies. 93 PL325 Power Amplifier (120V) (QSC part # FG-032500-00) . 93 PL325 Power Amplifier (100V) (QSC part # FG-032500-01) . 93 PL325 Power Amplifier (230V) (QSC part # FG-032500-02) . 93 Chassis Assembly PL325 (120V) (QSC part # WP-032500-00) . 93 Chassis Assembly PL325 (100V) (QSC part # WP-032500-01) . 94 Chassis Assembly PL325 (230V) (QSC part # WP-032500-02) . 95 PCB Assembly PL325 (120V) (QSC part # WP-032501-00). 95 PCB Assembly PL325 (100V) (QSC part # WP-032501-01). 98 PCB Assembly PL325 (230V) (QSC part # WP-032501-02). 101 Input Assembly PL325 (QSC part # WP-032502-00) . 105 6.3 PL340 parts and assemblies. 106 PL340 Power Amplifier (120V) (QSC part # FG-034000-00) . 106 PL340 Power Amplifier (100V) (QSC part # FG-034000-01) . 106 PL340 Power Amplifier (230V) (QSC part # FG-034000-02) . 106 Chassis Assembly PL340 (120V) (QSC part # WP-034000-00) . 106 Chassis Assembly PL340 (100V) (QSC part # WP-034000-01) . 107 Chassis Assembly PL340 (230V) (QSC part # WP-034000-02) . 108 PCB Assembly PL340 (120V) (QSC part # WP-034001-00). 108 PCB Assembly PL340 (100V) (QSC part # WP-034001-01). 112 PCB Assembly PL340 (230V) (QSC part # WP-034001-02). 115 Input Assembly PL340 (QSC part # WP-034002-00) . 118 6.4 PL380 parts and assemblies. 120 PL380 Power Amplifier (120V) (QSC part # FG-038000-00) . 120 PL380 Power Amplifier (100V) (QSC part # FG-038000-01) . 120 PL380 Power Amplifier (230V) (QSC part # FG-038000-02) . 120 RadioFans.CN 收音机爱 好者资料库 4QSC Audio Products, LLC Tables and Figures Chassis Assembly PL380 (120V) (QSC part # WP-038000-00) . 120 Chassis Assembly PL380 (100V) (QSC part # WP-038000-01) . 121 Chassis Assembly PL380 (230V) (QSC part # WP-038000-02) . 122 PCB Assembly PL380 (120V) (QSC part # WP-038001-00) through January 2008 . 122 PCB Assembly PL380 (100V) (QSC part # WP-038001-01) through January 2008 . 126 PCB Assembly PL380 (230V) (QSC part # WP-038001-02) through January 2008 . 130 PCB Assembly PL380 (120V) (QSC part # WP-038001-00) from February 2008 . 134 PCB Assembly PL380 (100V) (QSC part # WP-038001-01) from February 2008 . 138 PCB Assembly PL380 (230V) (QSC part # WP-038001-02) from February 2008 . 142