Equipment information

QSC Audio PL340 Amplifier
Manufacturer
QSC Audio
Model PL340
Date 2008
Category: Professional music equipment
Group Amplifier
Description
Information
                                    

These manuals are available for the above equipment:

Manual Type Service Manual QSC-9920-Manual-Page-1-Picture
Pages 154
Size 16.05 Mbytes (16834017 Bytes)
Language english
Revision A
Manual-ID/Number TD-000274-00
Date 01 January 2008
Quality Electronic document, no scan, very well readable.
Upload date
MD5 66c729e378327924eb0c6650ad33697e
Downloads 48 since 23 December 2017
Information
Tables and Figures
........................................................................................................................................................................
4
Specifications
................................................................................................................................................................................
6
1. Introduction
................................................................................................................................................................................
7
1.1 Restriction of Hazardous Substances Directive (RoHS)
.............................................................................................................................................1.2
Service bulletins and updates
....................................................................................................................................................................................1.3
The well-equipped service bench
..............................................................................................................................................................................1.4
Working with surface-mount components
.................................................................................................................................................................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
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
QSC-9920-Manual-Page-1-Picture


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