Table of Contents
RMX Series Performance Specifications ...................................................................................................................................................... 2
1. Introduction ..................................................................................................................................................................................................... 5
1.2 QSC serial numbers ....................................................................................................................................................................................... 5
1.3 Service bulletins ............................................................................................................................................................................................. 5
1.4 The well-equipped service bench .................................................................................................................................................................. 6
1.6 Series description .......................................................................................................................................................................................... 8
2. Component identification and pinout ..................................................................................................................................................... 11
3.1 Excessive current draw ................................................................................................................................................................................ 13
3.3 Faults with signal present ........................................................................................................................................................................... 14
3.4 Instability ...................................................................................................................................................................................................... 14
4. RMX calibration procedures ...................................................................................................................................................................... 16
4.1 Setting bias .................................................................................................................................................................................................. 16
5. Servicing RMX amplifiers ........................................................................................................................................................................... 18
6. Replacement parts ....................................................................................................................................................................................... 19
6.1 RMX850 Replacement Parts ....................................................................................................................................................................... 19
6.2 RMX1450 Replacement Parts ..................................................................................................................................................................... 22
6.3 RMX1850HD Replacement Parts ................................................................................................................................................................. 25
6.4 RMX2450 Replacement Parts ..................................................................................................................................................................... 29
7. Schematics and diagrams .......................................................................................................................................................................... 33
(All models) ................................................................................................................................................................................................. 33
(All models) ................................................................................................................................................................................................. 34
Channel 1 ................................................................................................................................................................................................... 35
Channel 2 ................................................................................................................................................................................................... 36
Power Supply ............................................................................................................................................................................................. 37
Channel 1 ................................................................................................................................................................................................... 38
Channel 2 ................................................................................................................................................................................................... 39
Power Supply ............................................................................................................................................................................................. 40
7.9 RMX 1850HD Schematic Diagram 1 of 3
Channel 1 ................................................................................................................................................................................................... 41
7.10 RMX 1850HD Schematic Diagram 2 of 3
Channel 2 ................................................................................................................................................................................................... 42
7.11 RMX 1850HD Schematic Diagram 3 of 3
Power Supply ............................................................................................................................................................................................. 43
Channel 1 ................................................................................................................................................................................................... 44
RMX Series Technical Service Manual (2RU models)
TD-000098-00 rev. C
3