Qsc RMX 850, RMX 1450, RMX 1850HD, RMX 2450 User Manual

RMX™ Series

2RU models

▲▲

▲ RMX 850

▲▲

▲ RMX 1450

▲▲

▲ RMX 1850HD

▲▲

▲ RMX 2450

▲▲

QSC Audio Products, LLC Costa Mesa, CA 92626 USA

www.qscaudio.com

Technical Service Manual

*TD-000098-00*

TD-000098-00

Rev. C

Technical Service Manual

RMX 850

RMX 1450

RMX 1850HD

RMX Series

RMX 2450

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_support@qscaudio.com Web: http://www.qscaudio.com (product information and support)

http://www.qscstore.com (parts and accessory sales)

Document # TD-000098-00, Rev. C. Released June 2008.

RMX Series Technical Service Manual (2RU models) 1 TD-000098-00 rev. C

RMX Series Performance Specifications

RMX 850 RMX 1450 RMX 1850HD RMX 2450

OUTPUT POWER

in watts

FTC: 20 Hz–20 kHz @ 0.1% THD, both channels driven

8Ω per channel 185 260 350 450 4Ω per channel 280 400 550 650

EIA: 1 kHz @ 0.1% THD, both channels driven

8Ω per channel 200 280 360 500 4Ω per channel 300 450 600 750

1 kHz @ 1% THD, typical, both channels driven

2Ω per channel 430 700 900 1200

Bridge Mono:

8Ω, 20 Hz–20 kHz, 0.1% THD 530 800 1300 8Ω, 1 kHz, 0.1% THD 600 900 1200 1500 4Ω, 1 kHz, 1% THD, typical 830 1400 1800 2400

DYNAMIC HEADROOM 2 dB @ 4Ω DISTORTION

SMPTE-IM < 0.01% < 0.01% < 0.02% < 0.02%

FREQUENCY RESPONSE 20 Hz–20 kHz, +0/-1 dB

(at 10 dB below rated output power) -3 dB points: 5 Hz and 50 kHz

DAMPING FACTOR > 300 @ 8Ω NOISE (unweighted 20 Hz to 20 kHz, below rated output) 100 dB 100 dB 100 dB 100 dB VOLTAGE GAIN 31.6× (30 dB) 40× (32 dB) 46× (33 dB) 50× (34 dB) INPUT SENSITIVITY, V RMS

full rated power @ 8Ω 1.15v (+3.4 dBu) 1.15v (+3.4 dBu) 1.16v (+3.5 dBu) 1.23v (+4.0 dBu)

INPUT IMPEDANCE 10 kΩ unbalanced

20 kΩ balanced

CONTROLS Front: AC switch, Ch. 1 and Ch. 2 gain

Rear: 10-position DIP switch

INDICATORS POWER: Green LED CLIP: Red LED, 1 per channel

SIGNAL: Yellow LED, 1 per channel

CONNECTORS Input: Active balanced; XLR and ¼" (6.3 mm) TRS, tip and pin 2 positive, and barrier strip

Output: “Touch-Proof” binding posts and Neutrik Speakon™

COOLING Continuously variable speed fan, back-to-front air flow AMPLIFIER PROTECTION Full short circuit, open circuit, thermal, ultrasonic, and RF protection

Stable into reactive or mismatched loads

LOAD PROTECTION Turn-on/turn-off muting (all models)

AC coupling AC coupling

Triac crowbar (each channel) Triac crowbar (each channel)

OUTPUT CIRCUIT TYPE AB AB H H

AB: Class AB+B complementary linear output H: Class AB+B complementary linear output with Class H 2-step high efficiency circuit

DIMENSIONS 19.0" (48.3 cm) wide, 3.5" (8.9 cm) tall (2 rack spaces)

15.9" (40 cm) deep (rack mounting to rear support ears)

WEIGHT Shipping: 41 lb. (18.6 kg) 46 lb. (20.9 kg) 50.5 lb. (23 kg) 50.5 lb. (23 kg)

Net: 35 lb. (15.9 kg) 40 lb. (18.2 kg) 44.5 lb. (20.2 kg) 44.5 lb. (20.2 kg)

POWER REQUIREMENTS Available for 120 or 220–240 VAC, 50/60 Hz

1

2

POWER CONSUMPTION

(both channels driven)

Multiply currents by 0.5 for 230V units

1. Typical—Measured with pink noise signal on all channels at 1/8 of full average power. Producing peaks that occasionally reach the amp’s clipping point, this level approximates the maximum operating

level before clipping affects sound quality. These data would be the amp’s typical worst-case current.

2. Full—Measured with pink noise signal on all channels at 1/3 of full average power. Music at this level would typically produce massive clipping. In a class B amplifier, this would be the approximate

point of maximum heat production.

3. Max—Measured with continuous sine wave signal on all channels at a point of slight clipping (1% THD). This represents a “test bench” scenario and does not resemble any real-world usage.

@ 120 VAC

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SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE

2 QSC Audio Products, LLC

Table of Contents

RMX Series Performance Specifications ...................................................................................................................................................... 2

1. Introduction ..................................................................................................................................................................................................... 5

1.1 Restriction of Hazardous Substances Directive (RoHS)................................................................................................................................ 5

1.2 QSC serial numbers ....................................................................................................................................................................................... 5

1.3 Service bulletins ............................................................................................................................................................................................. 5

1.4 The well-equipped service bench .................................................................................................................................................................. 6

1.5 Working with surface-mount components ................................................................................................................................................... 6

1.6 Series description .......................................................................................................................................................................................... 8

1.7 Technical descriptions and theory of operation ........................................................................................................................................... 8

2. Component identification and pinout ..................................................................................................................................................... 11

3. Troubleshooting: Symptoms, causes, & remedies ................................................................................................................................ 13

3.1 Excessive current draw ................................................................................................................................................................................ 13

3.2 Protection, muting, and turn-on/turn-off delay problems ......................................................................................................................... 13

3.3 Faults with signal present ........................................................................................................................................................................... 14

3.4 Instability ...................................................................................................................................................................................................... 14

3.5 Power supply and rail balancing problems ................................................................................................................................................. 15

4. RMX calibration procedures ...................................................................................................................................................................... 16

4.1 Setting bias .................................................................................................................................................................................................. 16

4.2 Setting positive and negative current limits .............................................................................................................................................. 16

5. Servicing RMX amplifiers ........................................................................................................................................................................... 18

5.1 Mechanical disassembly and re-assembly .................................................................................................................................................. 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

7.1 RMX Assembly/Disassembly Diagram 1 of 2

(All models) ................................................................................................................................................................................................. 33

7.2 RMX Assembly/Disassembly Diagram 2 of 2

(All models) ................................................................................................................................................................................................. 34

7.3 RMX 850 Schematic Diagram 1 of 3

Channel 1 ................................................................................................................................................................................................... 35

7.4 RMX 850 Schematic Diagram 2 of 3

Channel 2 ................................................................................................................................................................................................... 36

7.5 RMX 850 Schematic Diagram 3 of 3

Power Supply ............................................................................................................................................................................................. 37

7.6 RMX 1450 Schematic Diagram 1 of 3

Channel 1 ................................................................................................................................................................................................... 38

7.7 RMX 1450 Schematic Diagram 2 of 3

Channel 2 ................................................................................................................................................................................................... 39

7.8 RMX 1450 Schematic Diagram 3 of 3

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

7.12 RMX 2450 Schematic Diagram 1 of 4

Channel 1 ................................................................................................................................................................................................... 44

RMX Series Technical Service Manual (2RU models) 3 TD-000098-00 rev. C

Table of Contents (continued)

7.13 RMX 2450 Schematic Diagram 2 of 4

Channel 2 ................................................................................................................................................................................................... 45

7.14 RMX 2450 Schematic Diagram 3 of 4

Power Supply ............................................................................................................................................................................................. 46

7.15 RMX 2450 Schematic Diagram 4 of 4

Power Supply Revision .............................................................................................................................................................................. 47

7.16 RMX Power Transformer Configurations

March 2007 and later ................................................................................................................................................................................ 48

7.17 RMX 850 Chassis Wiring Diagram ............................................................................................................................................................ 49

7.18 RMX 1450 Chassis Wiring Diagram .......................................................................................................................................................... 50

7.19 RMX 1850HD and RMX 2450 Chassis Wiring Diagram ........................................................................................................................... 51

4 QSC Audio Products, LLC

1. Introduction

1.1 Restriction of Hazardous Substances Directive (RoHS)

Since April 2006, all RMX Series amplifiers are manufactured to conform to the European Union’s RoHS Directive, which reduces the amount of hazardous substances allowed in products for sale within its member nations. In electronic equipment such as audio power amplifiers, this applies primarily to certain toxic heavy metals, such as lead, which may be present in electronic components, solder, and other parts.

RoHS-compliant materials

When servicing RoHS-compliant amplifiers, it is important for the service technician to use only RoHS-compliant components and solder (lead-free). All replacement parts provided by QSC for RoHS-compliant products are certified as RoHS compliant.

RoHS-compliant tools

Soldering irons and desoldering apparatus used on RoHS-compliant products must also not be contaminated by hazardous substances, such as lead. Therefore, you cannot use the same soldering and desoldering tools for RoHS-compliant products and solder as you do for non-compliant products and solder. You must either use separate soldering irons, desoldering tools and braid, etc., or at the very least designate separate tips and braids and use only the appropriate ones. If you contaminate a tip or braid, even inadvertently, by using it on a non-compliant product or solder, you should no longer use it with RoHS-compliant products or solder.

1.2 QSC serial numbers

Serial numbers on QSC RMX series amplifiers are nine digits long. The first four digits are a manufacturing date code in are the sequential identifying number for each individual amplifier. For example, a serial number of 0807xxxxx would indicate that the amplifier was built in 08/2007, or August 2007. The date code is important for determining whether an amplifier is subject to a service bulletin, covered by a warranty (in the absence of original purchase records), etc.

The amplifier’s serial number can be found on a label on the rear panel. The label also indicates the model number, power rating, 4Ω current draw, and the AC mains voltage the amplifier was made for.

Certain design changes that the RMX amplifiers have undergone commenced with a particular date code; for example, the RMX amplifiers with a date code of 0406 or later conform to the European Union’s RoHS Directive and must be serviced only with lead-free solder and soldering irons that are not contaminated with lead or other heavy metals covered by the directive.

mmyy

format; the last five digits

Figure 1.1. The label displays two vital pieces of information: the amplifier’s serial number and operating voltage

1.3 Service bulletins

Contact QSC Technical Services to make sure you have the most up-to-date service bulletins for RMX Series amplifiers. Service bulletins may be distributed in hard copy, via fax, and electronically (Adobe Acrobat PDF) via CD-ROMs, FTP from the QSC web site (www.qscaudio.com), and e-mail.

These service bulletins had been issued at the time this manual was printed:

• RMX0001, “Q205 Lead Stress” (RMX2450 only)

• RMX0002, “RMX Turn-on Delay” (all RMX models)

• RMX0003, “RMX2450 Turn-off Mute” (RMX2450)

• RMX0004, “RMX2450 AC Wire Routing” (RMX 2450)

• RMX0005, “RMX2450 AC Wire Replacement” (RMX2450)

• RMX0006, “RMX2450 IRFZ44N Field Effect Transistors (RMX2450)

RMX Series Technical Service Manual (2RU models) 5 TD-000098-00 rev. C

1.4 The well-equipped service bench

To properly service RMX amplifiers, a technician needs the right tools. The

SW1 SW2 SW3

technician’s service bench should have the following equipment:

• Digital multimeter with RMS AC voltage and current

R1 R2

R3 R4

• Digital clamp-on ammeter

• Dual-trace oscilloscope

• Audio distortion analyzer

SW4

8Ω 8Ω 8Ω 8Ω

• Non-inductive load resistors, configurable as 8 ohms (min. 500 watts capacity), as 4 ohms (min. 750 watts capacity), and 2 ohms (min. 1200 watts capacity); see Figure 1.2 and Table 1.1.

• Variable AC voltage source, such as a Variac or Powerstat variable transformer, with a rated current capacity of up to 25A (for 120V models) or 12A (for 230V models)

Figure 1.2. Load resistor bank

R1: 8 , 500W non-inductiveΩ R2–R4: 8 , 300W min. non-inductiveΩ

• Low-distortion audio sine wave generator

• Philips and flat screwdrivers

• Soldering iron with a fine tip, 25–60W recommended (if you service both RoHS-compliant and non-compliant amplifiers, you will need separate soldering and desoldering equipment for each)

• Appropriate rosin-core solder (use only RoHS compliant leadfree solder for RoHS-compliant amplifers; for non-RoHS amplifiers, use a 60/40 or 63/37 Pb/Sn alloy)

Table 1.1. Load resistor bank switch truth table

SW1 SW2 SW3 SW4

∞Ω (no load)

OFF•••

ON OFF OFF OFF

8Ω

ON ON OFF OFF

4Ω

ON ON ON OFF

2Ω

• Long-nose pliers

• Diagonal cutters

0Ω (short circuit)

ON • • ON

• Wire strippers

Automated test equipment, such as an Audio Precision workstation, is very useful for servicing RMX amplifiers. Contact QSC Technical Services to obtain applicable AP test files.

1.5 Working with surface-mount components

RMX amplifiers, like many modern electronic products, use surface-mount technology (SMT) components where appropriate in order to make high-density circuitry that is reliable and economical to manufacture.

SMT components in the RMX amps are used in the small-signal and control circuits, so they do not handle significant amounts of power; therefore, they are subject to very little stress and should seldom fail.

Figure 1.3.

Solder braid

Figure 1.4.

Solder

Figure 1.5.

6 QSC Audio Products, LLC

Sometimes they do fail, or they require replacement for a performance upgrade or modification. Thus, it is important to know how to work with SMT components.

Specialized tools and equipment exist for soldering, unsoldering, and removing SMT components quickly and efficiently, but they are often expensive. Most SMT repairs, though, can be handled reasonably well with common tools and equipment, such as tweezers, solder braid, and fine-tip soldering irons. The original factory components are tacked to the board with a spot of glue, so you might have to apply some force to break the adhesive.

Two-terminal components (resistors, capacitors, diodes, etc.)

Removal 1 Use two soldering irons, preferably about 25 to 40 watts, with fine tips.

2 With a soldering iron in each hand, hold one tip on the solder at one end of the component and the

other tip on the other end (Figure 1.3).

3 Once the solder melts on both ends, grip the component between the two tips and lift it from the

circuit board.

4 Use solder braid and a soldering iron to remove the solder from the two pads (Figure 1.4).

Tweezers

Figure 1.6.

Figure 1.7.

Solder

Insertion 1 With a soldering iron and appropriate solder, melt just enough solder onto one pad to create a small

mound (Figure 1.5).

2 Grasp the component in the middle with tweezers. Melt the small mound of solder with the iron and

place the component across the two pads (in the correct orientation, if the component is sensitive to direction) and press it flat against the circuit board, with one end of the component immersed in the melted solder (Figure 1.6).

3 Hold the component in place and take the soldering iron away. Let the solder harden to tack the

component in place.

4 Fully solder the other end of the component to its pad. Let the solder harden (Figure 1.7). 5 Fully solder the tacked end of the component to its pad (Figure 1.8).

Solder

Figure 1.8.

3 When the solder on both ends melts, grip the component between the two tips and lift it from the circuit board. You might need to

quickly touch the pad on the middle terminal with a soldering iron to melt any remaining solder that might be holding the component down.

4 Use solder braid and a soldering iron to remove the solder from the three pads. Insertion 1 With a soldering iron and appropriate solder, melt just enough solder onto one pad to create a small mound of solder.

2 Grasp the component with tweezers. Melt the small mound of solder with the iron and place the component in the correct orientation

across the three pads and press it flat against the circuit board, with one terminal of the component pressed into the melted solder.

3 Hold the component in place and take the soldering iron away. Let the solder harden to tack the component in place. 4 Fully solder the other terminals of the component to their pads. Let the solder harden. 5 Fully solder the tacked terminal of the component to its pad.

Removal 1 With a soldering iron and solder braid, remove as much solder as possible from the middle terminal of

the component.

2 With a soldering iron in each hand, hold one tip on the solder at the terminal at one end of the

component and the other tip on the terminal at the other end.

Multi-pin components (ICs, etc.)

Removal

Removing a multi-pin SMT component is a delicate procedure. Ideally, you should use a soldering iron with an attachment that allows you to heat all the pins simultaneously.

If such a soldering device is not available, use this procedure:

1 Use a soldering iron and solder braid to remove as much solder as possible from the pins of the component. 2 With fine tweezers, carefully try to lift each pin to see if it’s free. If it’s not, touch it with the tip of the soldering iron and if necessary,

use the solder braid to remove the remaining solder.

3 Repeat the process until all the pins are free and you can remove the component. Insertion 1 With a soldering iron and appropriate solder, melt just enough solder onto one pad to create a small mound of solder. It is usually

easiest to use a pad that corresponds to one of the end or corner pins of the component.

2 Grasp the component with tweezers. Melt the small mound of solder with the iron and place the component in the correct orientation

upon its pads and gently press it flat against the circuit board, with the appropriate terminal of the component pressed into the melted solder.

3 Hold the component in place and take the soldering iron away. Let the solder harden to tack the component in place. 4 Fully solder the other terminals of the component to their pads. Let the solder harden. 5 Fully solder the tacked terminal of the component to its pad.

Three-terminal components (transistors, etc.)

RMX Series Technical Service Manual (2RU models) 7 TD-000098-00 rev. C

1.6 Series description

QSC’s RMX Series amplifiers are entry-level professional audio products, designed for good, basic performance and reliability at low price. The series comprises six two-channel models; this manual covers the four two-rack-space models: the RMX850, RMX1450, RMX1850HD and RMX2450. See page 2 for complete

specifications. The three-rack-space models—the RMX4050HD and the RMX5050—are covered by another service manual.

The RMX850 and RMX1450 have single-sided printed circuit boards. The RMX1850HD and RMX2450 use double-sided boards.

1.7 Technical descriptions and theory of operation

Note: Some of these descriptions concern circuitry that is duplicated in the amplifier’s two channels. For the sake of simplicity, the descriptions are of Channel 1 only. Components in Channel 1 have a 3-digit designation with “1” as the first digit; their equivalents in Channel 2 have a “2” as the first digit, followed by the same two numerals. For example, R122 and R222 have identical functions in their respective channels.

Power supplies

Unlike other recent QSC amplifiers, the RMX line uses strictly conventional power supplies, with large transformers that operate at the 50 or 60 Hz frequency of the AC line. The electrical current in the secondary circuitry is converted to DC through a full-wave bridge rectifier. The resulting 100 or 120 Hz ripple is filtered out by large capacitors that also serve as current reservoirs for shortterm, transient demands.

The supply provides a bipolar set of supply rails for each channel, with equal quiescent positive and negative voltages, as shown in Figure 1.9. Note that unlike many bipolar supplies for complementary transistor arrangements, the secondary windings are not

Figure 1.9

connected to ground at the center. This is because the output transistors are directly mounted to the heat sink, metal-to-metal, to maximize heat transfer; this grounds the collectors, requiring somewhat different output and power supply arrangements. The grounded-collector concept is described later in this chapter.

In the RMX1850HD and RMX2450, the secondaries

To Channel 2 Center Tap

are tapped to provide an

Figure 1.10

+Vcc

-Vcc

+Vcc

-Vcc

+110V

-110V

+55V

-55V

Ch. 1 Center Tap

0.047 µF

12 5W×2Ω

Channel 1

Channel 2

Channel 1

intermediate set of bipolar rails for the Class H output circuitry. Figure 1.10 shows one channel. Class H operation is described later in this chapter.

The 24-volt cooling fan is driven by a separate DC supply that is powered by a 20-volt tap on the transformer primary. To minimize fan noise, the fan speed is controlled by varying its actual DC voltage in response to the amplifier’s heat sink temperatures. An optocoupler isolates the fan control circuitry from the thermal sensors.

Audio circuitry

The audio inputs are balanced to offer a reasonably high amount of common-mode noise rejection. The input balancing is done using a single op amp (one half of an NE5532 dual op amp) arranged as a differential amplifier. The degree of common-mode rejection is dependent on a close match between the input resistors (R100 and R101 in Figure 1.11) and between the feedback resistor and the shunt resistor (R105 and R106). The circuitry uses 1% precision resistors to ensure at least 40 dB of common-mode rejection.

The feedback and shunt capacitors, C101 and C103, add a firstorder high-frequency roll-off, down 3 dB at 88.4 kHz (over two octaves above the high end of the audio spectrum). This makes the amplifier less susceptible to RF interference, high-frequency oscillations, etc.

Also in this stage, the feedback loop contains one half of an NE5517 (equivalent to the more familiar LM13600) dual operational transconductance amplifier (Figure 1.12). The OTA is part of the clip limiter circuitry; when the clip limiter is activated, a control voltage increases the transconductance of the OTA, which essentially decreases the impedance of the feedback loop and reduces the gain of the stage in order to reduce the amount of clipping.

The gain control uses a linear potentiometer, but the impedances loading the wiper to ground make the pot approximate an audio taper over most of its rotation. After the wiper, RC networks roll off the low end, if the LF filter is set for that channel, at either 30 or 50 Hz, depending on the DIP switch setting on the rear panel.

8 QSC Audio Products, LLC

C101

180p-5%

+IN_A

-IN_A

R100

10.0K

^R_0805

R101

10.0K

^R_0805

R102

1K

^R_0805

^C_0805

R105

10.0K

^R_0805

NE5532

U101:1

+

3

-

2

R106

10.0K

^R_0805

C103

180p-5%

A1

C106

1

47µF NP

R112

2.5K

2.5K LINEAR RIGHT ANGLE POT

CW

R113

W

274

^R_0805

CCW

A1

To LM13600 operational

transconductance amp

Figure 1.11

The next active device is another 5532 op amp, U101:2. Its output drives the driver transistors, which in turn drive the output transistors. The output section has a Class AB+B configuration; the drivers (a complementary pair, Q105 and Q106, comprising an NPN MJE15032 and a PNP MJE 15033) are class AB. A series network of two diodes and a 100-ohm trimpot provide the small amount of forward bias on the transistor pair to keep crossover distortion minimal. In parallel with the trimpot is a 50-ohm thermistor with a negative temperature coefficient; as the circuitry warms, its resistance decreases. This reduces VBE on both Q105 and Q106, decreasing the bias current to reduce the threat of thermal runaway. The base of each driver transistor is tied to ground through a diode and a 2.2 kΩ trimpot in series; these set the current limiting threshold for their respective signal polarities.

The collector of each driver transistor directly drives the bases of its output transistors, which are the main power-handling signal devices. If you’re not familiar with the grounded-collector scheme,

To input op amp U101:1

+14V

R108

7.50K ^R_0805

R107

U10:1

LM13600M

11

5

7

R103

R104

1

10.0K ^R_0805

150K

^R_1206

-14V

8

+

-

C105

39K

^R_0805

3

2

4

^R_0805

100

R111

^R_0805

A1

100-25V

R110

270

^R_0805

R109

100

3906

Q100

From clip detection

820

R115

CLIP LIMIT SWITCH (Open to defeat clip limiter)

^R_1206

Figure 1.12

the arrangement of the output transistors might look somewhat backwards: PNP transistors connected to the positive voltage rail, and NPN on the negative rail. Not only that, but the transistors attached to the positive rail are for pulling the output voltage negative, and the ones on the negative rail swing the output positive. The collectors all connect to ground, which allows them to be mounted directly to the heat sink—metal-to-metal, without insulators in between—for the best possible transfer of heat away from the transistors. The emitters of the PNP and NPN transistors are coupled through resistors to the positive and negative supply rails, respectively, forming banks of common-emitter circuits driving the supply rails. Consequently, the devices drive the rails with the audio signal, which rides atop the DC. The output to the speaker load is taken from the point between the positive and negative reservoir capacitors; this is also where the negative feedback is taken from. The nature of this arrangement, with audio signal riding on the supply rails, is why the power supply has no ground reference.

Another unusual characteristic of the grounded-collector output section is that the signal at the output to the speaker is actually opposite in polarity to the signal at the op amp output. This is why the negative feedback resistor, R122, connects to the op amp’s non-inverting input instead of the inverting input.

The output point of the circuit couples to the output connector through an RLC network (R160, R161, R162, L100, and C124) that serves as a high-frequency snubber and also helps keep the amp circuitry stable when driving capacitive loads.

Clip detection

The output of the op amp also drives a group of four diodes (D102, D103, D105, and D106) arranged as a full-wave rectifier. Normally, the op amp’s output signal level is about 1 volt or less, which is all it takes to drive the driver transistors.

But because this point is within the overall feedback loop, when clipping occurs, the op amp approaches full open-loop gain and puts out a much higher signal voltage to try to make the output signal track the input. The four diodes rectify the voltage to drive the clip indicator LED, LD100. The current exiting the full-wave rectifier passes to ground through R127 and also drives the base of transistor Q100 through R115. If the clip limiter is switched on, Q100’s emitter is grounded, and when the voltage across R127 goes sufficiently negative to forward-bias Q100, which sends current through R111 and R103 into the amplifier bias input of the operational transconductance amplifier (OTA), U10:1. The OTA is in the negative feedback loop of U101:1, and increasing its transconductance essentially reduces the impedance of the feedback loop, which reduces the gain of the op amp stage. This reduces the signal level until the amount of clipping is minimal. When the clipping stops, Q100 is no longer forward-biased, and the gain returns to normal.

RMX Series Technical Service Manual (2RU models) 9 TD-000098-00 rev. C

DC protection

Power saved

The RMX1850HD and RMX2450 have a crowbar circuit, based on a triac and two silicon controlled rectifiers, on the output to protect against DC faults. If an amp channel puts out a DC voltage, which could be the result of a component or circuit failure, it will first trigger either D119 or D120, depending on the polarity of the voltage. The triggered SCR will in turn trigger triac Q113, shorting the output to ground through fuse F100. The fuse will blow, safeguarding the speaker load from the DC fault.

The output sections of the RMX850 and RMX1450 are AC coupled.

form a voltage divider between the two channel outputs. If the output signals are mirror images, the voltage at the junction of the resistors (bus BR_BAL) will be zero. If the signals are not mirror images—for example, one channel is defunct, distorting, or reduced in gain—a voltage will appear on BR_BAL. Through DIP switch 7, the BR_BAL bus becomes bus BR_CUT and feeds the bases of transistors Q8 and Q6, which are part of a 4-transistor circuit across the +15V and -15V rails that supply the op amps and the input circuitry. If the voltage on BR_CUT goes positive enough to forward-bias Q8, the transistor’s collector will collapse the +15V rail. At the same time, the emitter current from Q8 will flow

Class H

The RMX1850HD and RMX2450 utilize a two-step Class H output section. It is essentially a Class AB+B circuit but with two sets of bipolar supply rails. On both the positive and the negative sets of rails, a comparator circuit, called a “step driver,” compares the audio signal to the lower rail voltage. When necessary to fully reproduce the signal’s voltage swing—just before the instantaneous signal voltage reaches the lower rail voltage—the step driver turns on a TMOS power FET to pull the output transistors’ supply rail up from the lower voltage to the higher one, and then back down again when the signal allows. By keeping the transistors’ supply rails low whenever possible, the devices dissipate less unused power and generate less waste heat, making the amplifier more efficient than a straight class AB amplifier with the same power points (Figure 1.13).

The comparators are 311-type ICs: U170 on the positive step and U171 on the negative. Each one drives a high-gain complementary transistor pair (2N3904 + 2N3906), which drive the gate of their respective MOSFET.

+V

HI

+V

LO

Power saved

0

-V

LO

-V

HI

Figure 1.13. A two-tier class H amplifier circuit operates on the lower voltage rails until the signal amplitude requires the higher voltage.

Bridged mono operation and protection

When the amplifier is operated in bridged mono, its two channels work in tandem to produce up to twice the voltage swing that a single channel is capable of. To do this, Channel 2 produces a signal identical to Channel 1’s, but opposite in polarity—in other words, a mirror image.

Channel 2’s signal feed (bus BR_MONO_FEED) is an attenuated

through R25 and into the emitter of Q7, forward-biasing it, too. The collector of Q7 will then collapse the -15V rail.

Similarly, if BR_BAL goes sufficiently negative, it will forward-bias Q6, in turn forward-biasing Q9, and these will collapse the ±15V rails.

With the rails collapsed, the op amp and the input circuitry will not function, which will mute the audio.

version of the signal on Channel 1’s speaker bus. Closing DIP switch #6 (set to “BRIDGE MONO ON”), connects the BR_MONO_FEED bus on Channel 1 to the BR_RET bus on Channel

2. The BR_RET bus drives the non-inverting input of op amp U201:2 directly.

With two channels operating as one, but each having its own feedback and protection circuitry, it is vital to keep both running as mirror images. A protection circuit monitors the balance between Channel 1’s and Channel 2’s signals. Resistors R22 and R23 (R22A, R22B, R23A, and R23B on the RMX2450) are equal in value and

10 QSC Audio Products, LLC

2. Component identification and pinout

NE5532AN Dual operational amplifier

(part number IC-000211-GP; was 3130-2430-0)

OUTPUT A

INVERTING

INPUT A

NON-INVERTING

INPUT A

V-

1

2

3

4

AB

V+

8

OUTPUT B

7

INVERTING

6

INPUT B NON-INVERTING

5

INPUT B

LM311 Voltage comparator

(part number IC-000214-GP; was 3130-9240-0)

GROUND 1

NON-INVERTING

INPUT

INVERTING

INPUT

1

2

3

V-

4

V+

8

OUTPUT

7

BALANCE/

6

STROBE

BALANCE

5

NE5517D Dual operational transconductance amplifier

(may be substituted by LM13600 or LM13700)

(part number IC-000212-GP; was 3131-9730-0)

AMP BIAS INPUT A

DIODE BIAS A

NON-INVERTING

INPUT A

INVERTING INPUT A

OUTPUT A

BUFFER INPUT A

BUFFER OUTPUT A

1

2

3

4

5

V-

6

7

8

AB

AMP BIAS INPUT B

16

DIODE BIAS B

15

NON-INVERTING

14

INPUT B

INVERTING INPUT B

13

OUTPUT B

12

V+

11

BUFFER INPUT B

10

BUFFER OUTPUT B

9

2N5064 Sensitive gate thyristor

(part number QD-000350-10; was 4860-5250-5)

4N29 Opto-isolator

(part number IC-000213-GP; was 3130-9270-0)

1

2

3

6

5

4

2N3904 (NPN) Small-signal transistor

(part number QD-000204-GP; was 4860-0640-3)

2N3906 (PNP) Small-signal transistor

(part number QD-000205-GP; was 4853-9060-3)

C

3

12

BE

KAG

IRFZ44 TMOS power field effect transistor

(part number QD-000347-GP; was 490F-Z440-5)

GDS

RMX Series Technical Service Manual 11

MAC224 Triac (discontinued; see BTA41 triac below)

(part number QD-000221-GP; was 8910-0482-0)

G

MT1

MT2

MJE15032 (NPN) Driver transistor

(part number QD-000207-GP; was 4860-5020-5) MJE15033 (PNP) Driver transistor (part number QD-000210-GP; was 4860-5030-5)

2SC5200 (PNP) Power transistor

(part number QD-000209-GP; was 4860-5050-5)

2SA1943 (NPN) Power transistor

(part number QD-000208-GP; was 4860-5060-5)

TOSHIBA

B C E

BCE

ΩΩ

10 k

Ω Potentiometer (gain control)

ΩΩ

(part number PT-310006-GP; was 4750-6200-0; used April 2002 and earlier with 10 µF C106)

ΩΩ

2.5 k

Ω Potentiometer (gain control)

ΩΩ

(part number PT-225000-GP; was 4751-0420-0; used May 2002 and later with 47 µF C106)

potentiometer value printed on back

BTA41 Triac

(part number QD-000261-GP; replaces discontinued MAC224 Triac)

A1 A2 G

Note: To install the BTA41 Triac on a channel module circuit board that originally held a MAC224 Triac, first mount it to an adapter (QSC part number SR-000117-00) and then solder the adapter to the circuit board. See Service Bulletin RMX0008 for more information. The Triac and adapter are available together as a kit, QSC part number SG-000522-00.

12 QSC Audio Products, LLC

3. Troubleshooting: Symptoms, causes, & remedies

When first checking the operation of an amplifier on the bench, always turn your variable transformer down to zero before plugging the amplifier in. After you turn the amplifier on, gradually turn up the AC voltage as you observe the amplifier’s behavior and its current draw; this will help you determine what, if anything, is wrong with it. If you see or smell smoke, flames, or any other signs of short circuits or excessive current draw, quickly turn the AC back down to zero. If no such problems occur, it is usually safe to turn the AC up to the amplifier’s full operating voltage for further testing.

3.1 Excessive current draw

The customer complains of blowing circuit breakers or fuses, or burning smell or smoke.

Symptoms covered:

• Fuses blow immediately

• The amplifier quickly gets very hot

• Line circuit breakers trip at turn-on

• The amplifier hums loudly and the chassis vibrates

• The amplifier emits smoke

• The amplifier gives off a burning smell If the symptoms indicate a possible problem in the channel circuits

or output sections, you can isolate either channel module from the power supply by pulling its fuses from the AC board.

Possible situations:

Excessive current with no signal present

If the amplifier seems to run hot and draws higher-than-normal current when idling at full AC voltage, the cause could be bias misadjustments in the output circuitry of one or both channels. See the calibration procedures in the next section. In the RMX2450, the cause might also be blown step FETs; see service bulletin RMX0006.

Fast increase in current draw (current increases rapidly at only a few volts AC)

• The main bridge rectifiers BR100 and/or BR200 (all models) and BR101 and/or BR201 (RMX2450) is reversed or shorted.

• Supply clamp diode pairs D117 and D118 and/or D217 and D218 is reversed or shorted.

• The drivers and/or power transistors is shorted on both polarities (NPN

and

PNP) on one or both channels.

Moderate increase in current draw (current increases slowly, doesn’t become excessive until about ¼ of the amplifier’s full AC operating voltage)

• One polarity’s drivers and/or power transistors (NPN or PNP) is shorted, on one or both channels.

• Individual supply clamp diodes D117, D118, D217, or D218 is reversed or shorted.

• Bias diodes D108, D109, D208, or D209 or bias trimpots R131 or R231 is open.

Slow increase in current draw (current doesn’t become excessive until about half of the amplifier’s full AC operating voltage; amplifier may pass signal)

• The bias is severely misadjusted, or bias diodes D108, D109, D208, or D209 is defective.

• An oscillation is causing excessive current demand.

Runaway current draw (current increases sharply at about 25 to 33% of the amplifier’s full AC operating voltage)

One or more reservoir capacitors is reversed. CAUTION: the gas buildup in a reversed electrolytic capacitor can cause it to vent explosively. Immediately turn off power and let the

capacitor cool down before replacing it.

3.2 Protection, muting, and turn-

on/turn-off delay problems

The customer complains of amplifier locking up, or not turning on and off correctly.

Symptoms covered:

• Both channels do not come out of protect

• Amplifier will not thermally shut down when it should

• Power LED doesn’t light

• Too little or too much muting delay

• No clip limiting

• Fan doesn’t run, or runs always at high speed

Possible situations:

Both channels stay in protect after turn-on

• Q4 or Q5 is shorted base-to-emitter.

• Voltage across D8 should be 14 to 15 volts DC. If it is low, check D8 and R10; also, C7 and C8 is leaky.

• D9, R4, and/or R7 is open.

RMX Series Technical Service Manual 13

The amplifier will not thermally shut down when it overheats

Check for shorted D9, R4, or R7; check also for open LD1 (“POWER” LED), R2, or R5.

Too much or too little muting delay

• Excessive delay at turn-on: check for open LD1, R2, or R5; check for incorrect R10 or R15; check for shorted D9; also see service bulletin RMX0002.

• Too short at turn-on (amplifier unmutes before the circuits stabilize, causing a thump): check for incorrect or bad C7, C8, or R10.

• Amplifier doesn’t stay muted at turn-off: see service bulletin RMX0003

Power LED doesn’t light

Check for open or shorted LD1; check R2.

No clip limiting

• U10 is defective.

• DIP switches SW1:1 or SW1:10 is defective.

Fan doesn’t run

• The fan is defective.

• Check the fan connection to the AC board.

• Check R1 and BR1 on the AC board.

Fan runs always on high speed

• Q3 and/or U2 are shorted.

• Check PTC thermistors R4 and R7.

3.3 Faults with signal present

The customer compains that the amplifier passes a signal but doesn’t run correctly.

The output signal collapses when driving a normal speaker load

• R139, R140, R239, and/or R240 is misadjusted.

• Check R118, R119, R218, and R219.

The supply rails are OK with no signal but collapse with a signal

• C112, C113, C212, and/or C213 is leaky.

• Check C114, C124, C214, and C224.

The amplifier gets too hot with no load

• Bias trimpots R131 or R231 are misadjusted, burned, or open.

• Bias diodes D108, D109, D208 and/or D209 are incorrect (should be 1N4934).

• If the amplifier is producing high-frequency oscillations, check C114, C124, C214, and C224.

• Check resistors R136, R137, R236, and R237.

• Op amp U101 or U201 is unstable.

One channel clips prematurely

• R146 or R147 (Channel 1) or R246 or R247 (Channel 2) are open.

• R139 or R140 (Channel 1) or R239 or R240 (Channel 2) are misadjusted.

• Check R157, R158, R198 (RMX1850HD and RMX2450 only), D115, and D116 (Channel 1) or R157, R258, R298 (RMX1850HD and RMX2450 only), D215, and D216 (Channel 2).

• (RMX850 and RMX1450) Check R118 and R119 (Channel 1) or R218 and R219 (Channel 2).

• R130 or R132 (Channel 1) or R230 or R232 (Channel 2) is open.

Excessive hum in loudspeaker when no signal is present (RMX850 and RMX1450)

Check R118, R119, R218, and R219.

Excessive current draw with signal present (RMX1850HD and RMX2450)

• Check triacs Q113 and Q213.

• Check D119, D120, D219 and D220.

Symptoms covered:

• The output signal breaks up or is distorted

• “Ringing” sound in loudspeaker when no audio signal is present

• The output signal collapses when driving a normal speaker load

• Supply rails OK with no signal, but collapse when a signal passes

• The amplifier gets too hot

• One channel clips prematurely

• Excessive hum in loudspeaker when no audio signal is present

Possible situations:

The output signal breaks up or is distorted

• (RMX850 and RMX1450) Check the hum-null resistors R118, R119, R218, and R219.

• Check the ground traces for continuity among speaker ground, input ground, and AC ground.

“Ringing” sound in loudspeaker when no audio signal is present

• Check C114, C124, C214 and C224.

• Check or replace dual op amp U101 or U201.

14 QSC Audio Products, LLC

3.4 Instability

The customer complains of gain problems, spurious noises, or oscillations.

Symptoms covered:

• General output distortion

• “Ringing” sound in loudspeaker trailing an audio signal

• Excessive crossover distortion

• The output waveform appears fuzzy on an oscilloscope Distinguish among the different symptoms of fuzziness (instability),

ringing (momentary instability after a transition), crossover distortion (often causing ringing), or general distortion.

Possible situations:

General distortion in the output signal

• Severe distortion, at any load, often with abnormally high current draw: check the slew rate capacitors C114, C115, and

C116 (Channel 1) or C214, C215, and C216 (Channel 2).

• Moderate distortion, especially with light loading: stability capacitors C124 and C126 (Channel 1) or C224 and C226 is too high in capacitance; also check the slew rate capacitors C114, C115, and C116 (Channel 1) or C214, C215, and C216 (Channel

2), and the output filter resistors R161, R162, R154, and R155 (Channel 1) or R261, R262, R254, or R255 (Channel 2).

• Distortion with low gain: check the feedback shunt components R120, R138, and C125 (Channel 1) or R220, R238, or C225 (Channel 2); also check for broken circuit traces around the components; U101 (Channel 1) or U201 (Channel 2) is defective or its socket is contaminated.

Ringing sound trailing the audio signal

• This usually indicates marginal instability and is usually triggered by the signal passing through zero volts (the crossover point). Check the stability components and output filters.

• With a sine wave test signal, use an oscilloscope to check for excessive crossover notch at the output signal’s zero crossings.

Excessive crossover distortion (unbalanced, asymmetrical, or excessively large crossover notch)

• Severe crossover discontinuity: bias diodes D108 or D109 (Channel 1) or D208 or D209 (Channel 2) are shorted.

• Moderate discontinuity: bias diodes D108 or D109 (Channel 1) or D208 or D209 (Channel 2) are out of spec.

• R131 (Channel 1) or R231 (Channel 2) is defective.

• Base resistors R136 or R137 (Channel 1) or R236 or R237 (Channel 2) are open. Also check the NTC thermistors R134 (Channel 1) or R234 (Channel 2).

3.5 Power supply and rail

balancing problems

Symptoms covered:

• Insufficient or excessive current limiting into a shorted load

• Op amp rails too high with a shorted load

• Uneven voltages on supply rails

A channel’s output current should remain unaffected when driving resistive loads as low as 2 ohms per channel. When driving a short circuit, the current limiting circuit should collapse the output to a lower current. This is done by dropping the op amp’s supply rails from a normal ±14–15 volts down to about ±5–6 volts. Normally, the output signal helps replenish the op amp supply rails through D115 and D116 (Channel 1) and D215 and D216 (Channel 2), but a short circuit or excessively low load impedance prevents the replenishment, and the op amp rails collapse because they can’t supply enough current to let the op amp drive both the clip LED and the driver transistors. The current limit trimpots R139, R140, R239, and R240 permit adjustment of the current limit thresholds. See the RMX calibration section of this manual for adjustment procedures.

Possible situations:

Excessive current into short (insufficient limiting)

• If the op amp rails are dropping to ±5 to 6 volts as they should: the 5.6V zener diodes D107 and/or D110 (Channel 1) or D207 and/or D210 (Channel 2) are reversed or shorted.

• If high crossover distortion is present: bias diodes D108 or D109 (Channel 1) or D208 or D209 (Channel 2) are shorted.

Excessive current into short (op amp rails are not dropping)

• The op amp U101 (Channel 1) or U201 (Channel 2) is defective, with insufficient output current.

• Clip LED LD100 (Channel 1) or LD200 (Channel 2) and/or its rectifying diodes (Channel 1: D102, D103, D105, D106; Channel 2: D202, D203, D205, D206) are open.

• When driving a short circuit, the output section’s positive and negative supply rail voltages should be equal, within 3 volts. If they aren’t, check D107, D110, R146, and R147 (Channel 1) or D207, D210, R246, and R247 (Channel 2).

Weak current into 2 limiting)

• Bias resistors R130 and R132 (Channel 1) or R230 and R232 (Channel 2) are too high.

• Driver transistors (Channel 1: Q105, Q106; Channel 2: Q205, Q206) have very low gain.

• One or more emitter resistors in the output section are open.

Current OK at 2

• LD100, D102, D103, D105, or D106 (Channel 1), or LD200, D202, D203, D205, or D206 (Channel 2), are shorted.

• Zener voltage of diodes D107 or D110 (Channel 1), or D207 or D210 (Channel 2), is too high.

Current limits properly into short, but current is weak at 2

• If the op amp rails are low (< 14–15 volts) when driving a 2ohm load (Channel 1, all models), R198 (Channel 1, RMX1850HD and RMX2450 only) and diodes D115 and D116 (Channel 1, all models), or R257 and R258 (Channel 2, all models), R298 (Channel 2, RMX1850HD and RMX2450 only) and diodes D215 and D216 (Channel 2, all models).

• If the op amp rails are normal (14–15 volts) when driving a 2-ohm load weak driver transistors, open output transistors, or open emitter resistors. Check the value of the driver transistors’ emitter resistors, too: R146 and R147 (Channel 1) or R246 and R247 (Channel 2).

Rail voltages unequal

The balance between the positive and negative rail voltages is set by a voltage divider comprising resistors R118 and R119 (Channel

1) and R218 and R219 (Channel 2). If the amplifier channel passes

a signal but clips unevenly due to unequal rail voltages, this voltage divider is the likely culprit.

without

ΩΩ

Ω or short (excessive or premature

ΩΩ

Ω, weak into short

ΩΩ

clipping, check the resistors R157 and R158

clipping, usually the output section gain is too low:

ΩΩ

Ω

ΩΩ

RMX Series Technical Service Manual 15

4. RMX calibration procedures

4.1 Setting bias

Always set the bias

• after replacing any output or driver transistor.

• after replacing any diode or resistor in the driver/output circuitry.

• if the amplifier seems to run too hot at idle.

• if the amplifier exhibits crossover distortion. The bias network sets the quiescent base current in the NPN and

PNP driver transistors, which in turn sets the quiescent current in the output transistors. The driver transistors should both be slightly “on” at idle so that the transitions of the signal voltage between positive and negative are smooth and free of gaps or glitches. Too much bias current will cause the amplifier to run hotter than it should, especially at idle, while too little will cause noticeable crossover distortion, especially at low signal levels.

The amplifier circuitry must be cool, or at least within a couple degrees of ambient air temperature, and the top cover must be removed. If the driver and output transistors are significantly warmer than the ambient air, leave the amplifier off and let it cool before proceeding.

Before turning the amplifier on to set bias on one or both channels, familiarize yourself with the locations of the trimpots (R131 and R231) and the voltage measuring points so you can work quickly but thoroughly. If the amplifier warms up before you finish setting the bias, you will need to shut the amplifier off and let it cool down before you resume.

Tools and resources you will need:

• Small flat screwdriver (non-conductive) for adjusting trimpots

• DC voltmeter

• AC power

Procedure

1. Turn the amplifier’s gain controls all the way down. No test

signal is needed.

2. Plug the amplifier into an appropriate AC source. Turn the

amplifier on.

3. Channel 1: While measuring the DC voltage across resistor R146,

adjust trimpot R131 to obtain the voltage listed in Table 1.

4. Channel 2: While measuring the DC voltage across resistor R246,

adjust trimpot R231 to obtain the voltage listed in Table 1.

After setting the bias, calibrate the positive and negative current limiting; instructions for the procedure follow below.

4.2 Setting positive and negative current limits

Tools and resources you will need

• Oscilloscope

• 2-ohm resistive load (rated for at least 1200 watts)

• Shorting connector for amplifier output

• Variable AC transformer (e.g., Variac, Powerstat, etc.) rated for 25A (120V) or 12A (230V). Make sure the AC supply is appropriate for the amplifier.

• 1 kHz audio sine wave generator

• Digital multimeter

• Clamp-on digital current meter (e.g., Fluke 30 Clamp Meter)

• Small flat screwdriver (non-conductive) for adjusting trimpots

Procedure

1. Set the audio sine generator to 1 kHz at 1 volt RMS and

connect it to Channel 1's input. Connect a 2-ohm load and the oscilloscope probe across Channel 1's output.

2. Turn up Channel 1's gain control partway. On the oscilloscope

you should see the amplitude of the sine wave increase accordingly.

3. Turn the gain control back down and apply a short circuit

across the output terminals of Channel 1. Clamp a current probe either onto one of the brown wires running to the AC switch or onto the gray output wire from channel 1's module.

4. Turn the gain control all the way up. Adjust trimpots R139 and

R140 equally until the current measured falls within the range shown in Table 1.

5. Turn the gain control all the way down and remove the short

circuit so the channel drives the 2-ohm load. Turn the gain control back up until the output clips. The voltage at which the signal starts to clip should fall within the range shown in Table 1. If the clipping is asymmetrical, that is, the signal clips on either the positive or negative side first, adjust R139 to make it symmetrical.

6. Turn the gain control down. If the amp has begun to warm up

shut it off and let it cool a few minutes before proceeding with Channel 2.

7. Repeat steps 1 through 5 for Channel 2. Use trimpots R239 and

R240 to adjust the current limiting in steps 11 and 12.

8. Turn both channels’ gain controls all the way down. Clamp the

ammeter onto one of the amp’s AC wires and check the amp’s idle current. If the amplifier is still at about room temperature, the idle current should match the value shown in Table 1.

16 QSC Audio Products, LLC

Table 1: Bias and current limit adjustments

Calibrations Adjust RMX850 RMX1450 RMX1850HD RMX2450

Channel 1 bias: DC voltage across R146 R131 0.16 V 0.14 V 0.07 V 0.07 V

Channel 2 bias: DC voltage across R246 R231 0.16 V 0.14 V 0.07 V 0.07 V

Output current into shorted load

AC current when driving shorted load*

Channel 1: R139 & R140 Channel 2: R239 & R240

4–4.5 A 4–5 A 7.5–8.5 A 8.5–9 A

3.75–4.5 A 4.5–5.5 A 4.5–5.5 A 5.5–6.5 A

Channel 1: Adjust R139

Clipping voltage into 2 ohms (RMS)

for symmetry

Channel 2: Adjust R239

26–29 V 33.5–37.5 V 42–44 V 44–49 V

for symmetry

Channel 1: Adjust R139

Clipping voltage into 2 ohms (peak)

for symmetry

Channel 2: Adjust R239

36.8–41 V 47.4–53 V

for symmetry

Idle AC demand* (at ambient temperature; higher when hot)

*Figures shown are for 120V amplifiers; multiply current by 0.5 for 230V or 1.2 for 100V.

0.4 A,

±10%

0.4 A,

±10%

59.3

0.6 A,

–62.2 V

±10%

62.2–69.3 V

0.6 A,

±10%

RMX Series Technical Service Manual 17

5. Servicing RMX amplifiers

5.1 Mechanical disassembly and re-assembly

Replacing components will usually require removing the channel modules and/or AC board from the amplifier chassis, especially on the RMX850 and RMX1450, which have single-side printed circuit boards. The RMX2450 has double-side boards; many of the throughhole components on the upper side of the board can be unsoldered and soldered from the top side of the board, so removing modules or boards is not always necessary.

See the fold-out assembly guides on pages 25 and 26 in this manual for assistance.

NOTE: As viewed from the front of the amplifier, the left channel module is Channel 1 and the right is Channel 2 RMX2450; its right module is Channel 1, and its left is Channel 2.

Removing the channel modules

1. Disconnect the amplifier from AC power and allow at least 10

minutes for internal voltages to bleed down.

2. Using a Philips screwdriver, remove the screws that fasten the

top cover to the chassis. Also remove the top cover’s four recessed screws that fasten it to the heat sinks. As you remove screws, set them aside, but also make note of where each type is used so you can properly re-assemble the amplifier.

3. Lift the top cover up at the rear and carefully pull it toward the

back, removing the five hooks on the front edge from their slots in the chassis.

4. Pull the gain control knobs straight off from the potentiom-

eter shafts.

5. Tip the amplifier up on its side and remove the four screws

that fasten the heat sinks to the chassis.

6. Set the amplifier back down and remove the screws that

mount the channel modules to the chassis standoffs. There are six screws in the left module and five in the right one.

7. Remove the four screws that fasten the fan, fan shroud, and

fan guard to the chassis. Lift the fan shroud out from the chassis; this will give you room to properly remove the modules from the chassis.

8. Disconnect the wire and cable connections to the channel

modules. All of the connections are either detachable headers or ¼-inch quick-connect tabs that are disconnected by pulling them straight up. No unsoldering is necessary.

except

in the

9. Slide the channel modules toward the back so the potentiom-

eter shafts and front panel LEDs are clear of their holes in the front panel. Lift the channel modules out from the chassis.

10. Re-assembly is the opposite of disassembly.

Removing the AC board

The AC board provides AC voltage selection, rectification of the transformer secondary current, and a regulated DC supply for the cooling fan. It seldom needs to be replaced unless it is physically damaged itself. Most failures involving the AC board can be repaired through replacement of individual components.

WARNING: Regulatory agencies require that any operating voltage conversions from 120 volts to any other voltage be done

only

by QSC’s factory service. Any other operating voltage conversions may be done only by a QSC-authorized service center or international distributor.

1. Disconnect the amplifier from AC power and allow at least 10

minutes for internal voltages to bleed down.

2. Remove the four screws that fasten the fan, fan shroud, and

fan guard to the chassis. Lift the fan shroud out from the

chassis.

3. Disconnect the wires that connect to the channel modules. All

of the large single wires attach to the channel modules with

¼-inch quick-connect tabs that are detached by pulling them

straight up. The remaining three black wires disconnect at the

left channel module with a detachable header.

If you are planning to replace the AC board with another,

carefully cut each of the transformer wires connecting to the

board just above its solder tab. You must leave enough slack

to allow connection to the new AC board. Remove the old

heat shrink tubing from the wires and strip the wire ends

about 0.25 inch or 6.3 mm.

4. Remove the five screws that attach the AC board to the

chassis standoffs. Lift the board out from the chassis.

5. Re-assembly is the opposite of disassembly. If you’re using a

new AC board, slide new pieces of heat shrink tubing over the

transformer wires before you solder them to the appropriate

tabs on the board; after soldering, cover the joints with the

tubing and use a heat gun or other heat source to shrink them

tightly.

18 QSC Audio Products, LLC

6. Replacement parts

6.1 RMX850 Replacement Parts

QSC part # Old QSC part # Description Qty. Notes or Component Reference

Misc.

CH-000198-GP 4134-8432-0 RACK-MOUNT BRACKET 2 CO-000211-GP 2113-1144-0 AC INLET, 250V 15A 1 MS-000138-GP 8900-9050-1 DC FAN 24V 80X80 (+5V) 1 PL-000147-GP 2444-1001-1 KNOB RMX PLASTIC BLACK 2 SW-000086-GP 5200-3532-0 CIRCUIT BREAKER 10A 1 For 120V models SW-000088-GP 5200-4717-0 ROCKER POWER SWITCH 1 SW-000093-GP 5200-4730-0 CIRCUIT BREAKER 5A 1 For 230V models WC-000181-GP 7010-9640-0 AC CORD 15A, 14 AWG, ISA 1 For 120V models WC-000213-GP 7009-8620-0 AC CORD SET CE 1 For 230V models *XF-000117-GP 1806-2505-0 POWER TRANSFORMER RMX850 120V/230V 1 Discontinued; replaced by XF-000314-GP and XF-000315-GP XF-000314-GP 1806-3983+0000 TRANSFORMER, 230V,RMX850 1 For 230V models XF-000315-GP 1806-3982+0000 TRANSFORMER, 120V,RMX850 1 For 120V models

WP-008502-00 AC Board Assembly

CA-422005-GP 153R-224K-5-Y1 CM 250V 0.22uF 10% RL 2 C127, C227 CA-810006-GP 157Q-108M-5-X9E 1000UF 35V 20% ELECTROLYTIC 1 C6 HW-000020-GP 4134-8851-0 FUSE HOLDER 6.3MM 4 REF: F100, F200 IC-000213-GP 3130-9270-0 IC 4N29 1 U2 MS-000126-GP 5400-0831-0 HEATSINK, BRIDGE RECTIFIER 1 REF: Q3 MS-000129-GP 5100-1030-3A FUSE T10A 125V/250V 2 F100, F200 QD-000200-GP 4840-1760-0 DIODE RECT 1A 200V DB103 1 BR1 QD-000214-GP 4860-2620-5 TR TIP31C SAMSUNG 1 Q3 QD-000227-GP 4840-2150-0 BRIDGE RECTIFIER 400V 25A 2 BR100, BR200 RE-000005-GP 8910-0273-0 POLYSWITCH 1.1A 0.15 OHM 1.5W 1 R1 RE-000270-GP 8910-0275-0 THERMAL NTC 30A 1 OHM 1 R21 RE-012004-GP 4719-121J-1-X RMF 2W 120 OHM 5% 1 R17 RE-120003-GP 4701-202J-C RCF 1/8W 2K 5% ATS 1 R13 RE-168002-GP 4701-682J-C RCF 1/8W 6.8K 5% ATS 2 R9, R14

4701-474J-C RCF 1/8W 470K 5% ATS 1 R12

WP-008503-00 Channel 1 Module Assembly (left)

CA-233004-GP 153F-332J-5-KW CM 50V .0033UF 5% RL 2 C117, C118 CA-322006-GP 153F-223J-5-LQ CM 50V 0.022UF 5% RL 2 C116, C119 CA-368004-GP 153R-683J-5-WWM 0.068UF 5% 250V FILM DIPPED 1 C124 CA-547008-GP 157R-475M-5-OV 4.7UF 20% 250V ELECTRO RAD 1 C7 CA-647005-GP 157F-476M-5-LU CE 50V 47UF 20% RL 1 C8 CA-847001-GP 8910-0062-0 CE 80V 4700U 20% RL 25X 2 C120, C121 PT-110002-GP 4756-1016-3-06 TRIM POT,100,20 PCNT,0.15W,, 1 R131 QD-000198-GP 3700-4531-G LED 4.7MM GRN W/STAND 1 LD1 QD-000202-GP 4804-0040-1 DIODE IN4004 AL 5 D1, D11, D12, D117, D118 QD-000203-GP 4838-15V6-2 DIOD ZNR 15V 1W SILICON EPIT 2 D8, D15 QD-000206-GP 4804-9340-2 DIOD RECT FAST, IN4934 AT 2 D108, D109 QD-000207-GP 4860-5020-5 XISTOR NPN 250V 0.5A MJE15032 1 Q105 QD-000208-GP 4860-5060-5 TR 2SA1943 T0-3P (L) 3 Q103, Q107, Q109 QD-000209-GP 4860-5050-5 TR 2SC5200 T0-3P (L) 3 Q108, Q110, Q112 QD-000210-GP 4860-5030-5 XISTOR PNP 250V MJE15033 1 Q106 QD-000211-GP 4860-8890-0 TR MPSA06 VCE 80V NS 1 Q5 *QD-000212-GP 4837-5B10-2 DIODE ZENER 1/2W 5.5-5.8V 2 D107, D110 (December 2003 and earlier) *QD-000269-GP * DIODE ZENER 5.1V 5% .25W DO-35 2 D107, D110 (January 2004 and later) RE-.02201-GP 471A-022K-5-N 0.22 OHM 5% 3W THK FLM 6 R142, R148, R149, R152, R153, R159 RE-.56006-GP 4719-5R6J-1-X RMF 2W 5.6 OHM 5% 1 R160 RE-.68001-GP 4718-6R8J-1-X RMF 1W 6.8 OHM 5% 2 R146, R147 RE-000250-GP 8910-0488-0 NTC RES 50 OHM 1 R134

(was PCB-QZ010C-PSU)

(was PCB-QZ010C-PWR1)

RMX Series Technical Service Manual (2RU models) 19 TD-000098-00 rev. C

RMX850 Channel 1 Module Assembly (continued)

QSC part # Old QSC part # Description Qty. Notes or Component Reference

RE-000260-GP 8910-0274-0 THERMAL PTC 60C 100 OHM 1 R7 RE-001201-GP 471B-120J-1-X 12 5% 5W METAL OXIDE FILM 2 R161, R162 RE-002202-GP 4718-220J-2-P RMF 1W 22R 5% AT FP 2 R136, R137 RE-082005-GP 471B-821J-1-X RMF 5W 820 OHM 5% AL METAL 2 R157, R158 RE-120007-GP 471B-202J-1-X RMF 5W 2K 5% AL METAL 2 R133, R135 RE-122006-GP 4756-2226-3-06 SVR 2.2K H3 7X7 2 R139, R140 RE-215006-GP 4719-153J-1-X RMF 2W 15K 5% AL METAL 2 R2, R5 XF-000190-GP 1804-1030-0 SPRING COIL 2uH 1 L100

Channel 1 SMT parts

CA-210011-GP 150H-102J-6-CF CC 100V 0.001U 5% 1206 1 C114 CA-222007-GP 150F-222K-6-CF 50V .0022UF 10% 1206 1 1 C115 QD-000201-GP 4804-1480-3 DIODE LL4148 SM 15 D2–D7, D9, D14, D104, D111–D116 QD-000204-GP 4860-0640-3 XISTOR NPN 60V 200MA 3904 SOT-23 4 Q8, Q9, Q101, Q102 QD-000205-GP 4853-9060-3 XISTOR PNP 40V 0.2A TR3906 SOT-23 3 Q4, Q6, Q7 QD-000213-GP 4860-5110-3 TR KST42 1 Q1 RE-004702-GP 4720-470J-J RMG 1/10W 47 OHM 5% 0805 2 R25, R124 RE-082003-GP 4721-821J-6 RMG 1/8W 820 OHM 5% 1206 2 R130, R132 RE-115004-GP 4720-152J-J RMG 1/10W 1.5K 5% 0805 1 R129 RE-120004-GP 4720-202J-J RMG 1/10W 2K 5% 0805 1 R 8 RE-168002-GP 4721-682J-6 RCF 1/8W 6.8K 5% ATS 1 R19 RE-210006-GP 4720-103J-J RMG 1/10W 10K 5% 0805 1 R128 RE-247004-GP 4721-473J-6 RMG 1/8W 47K 5% 1206 1 R125 RE-315003-GP 4721-154J-6 RMG 1/8W 150K 5% 1206 1 R10 RE-322001-GP 4721-224J-6 RMG 1/8W 220K 5% 1206 2 R18, R27 RE-322002-GP 4720-224J-J RMG 1/10W 220K 5% 0805 1 R26 RE-347002-GP 4721-474J-6 RMF 1/8W 470K 5% ATS 1 R15 RE-410002-GP 4721-105J-6 RMG 1/8W 1M 5% 1206 2 R3, R6

WP-008504-00 Channel 2 Module Assembly (right)

CA-233004-GP 153F-332J-5-KW CM 50V .0033UF 5% RL 2 C217, C218 CA-322006-GP 153F-223J-5-LQ CM 50V .022UF 5% RL 2 C216, C219 CA-368004-GP 153R-683J-5-WWM 0.068UF 5% 250V FILM DIPPED 1 C224 CA-415004-GP 153F-154J-5-NLM 0.15UF,5%,50V,CM,,RBT,7.5X 4 C108, C109, C208, C209 CA-422006-GP 153F-224J-5-NLM CM 50V 0.22UF 5% RL 2 C107, C207 CA-610020-GP 157F-106M-5-LUN CE 50V 10UF 20% RLT 5 X 11 2 C106, C206 CA-710009-GP 157E-107M-5-KW CE 25V 100UF 20% RL 2 C105, C205 CA-722006-GP 157E-227M-5-PU CE 25V 220UF 20% RL 4 C112, C113, C212, C213 CA-847001-GP 8910-0062-0 CE 80V 4700UF 20% RL 25X 2 C220, C221 CO-000222-GP 2101-1991-0 8-PIN IC SOCKET 2 REF: U101, U201 IC-000211-GP 3130-2430-0 IC NE5532 OP AMP 2 U101, U201 PT-110002-GP 4756-1016-3-06 TRIM POT,100,20 PCNT,0.15W,, 1 R231 *PT-225000-GP *4751-0110-0 RES VAR 2.5K RT ANGLE PCB 2 R112, R212 (May 2002 and later) *PT-310006-GP *4750-6200-0 VR V012CPH, D-SHAFT 10K 2 R112, R212 (April 2002 and earlier) QD-000197-GP 3700-4529-R LED 4.7MM RED W/STAND 2 LD100, LD200 QD-000199-GP 3700-4530-Y LED 4.7MM W/STAND YELLOW 2 LD101, LD201 QD-000202-GP 4804-0040-1 DIODE IN4004 AL 4 D10, D13, D217, D218 QD-000203-GP 4838-15V6-2 DIOD ZNR 15V 1W SILICON EPIT 4 D100, D101, D200, D201 QD-000206-GP 4804-9340-2 DIOD RECT FAST, IN4934 AT 2 D208, D209 QD-000207-GP 4860-5020-5 XISTOR NPN 250V 0.5A MJE15032 1 Q205 QD-000208-GP 4860-5060-5 TR 2SA1943 T0-3P (L) 3 Q203, Q207, Q209 QD-000209-GP 4860-5050-5 TR 2SC5200 T0-3P (L) 3 Q208, Q210, Q212 QD-000210-GP 4860-5030-5 XISTOR PNP 250V MJE15033 1 Q206 *QD-000212-GP 4837-5B10-2 DIODE ZENER 1/2W 5.5-5.8V 2 D207, D210 (December 2003 and earlier) *QD-000269-GP * DIODE ZENER 5.1V 5% .25W DO-35 2 D207, D210 (January 2004 and later) RE-.02201-GP 471A-022K-5-N 0.22 OHM 5% 3W THK FLM 6 R242, R248, R249, R252, R253, R259 RE-.56006-GP 4719-5R6J-1-X RMF 2W 5.6 OHM 5% 1 R260 RE-.68001-GP 4718-6R8J-1-X RMF 1W 6.8 OHM 5% 3 R20, R246, R247 RE-000250-GP 8910-0488-0 NTC RES 50 OHM 1 R234 RE-000260-GP 8910-0274-0 THERMAL PTC 60C 100 OHM 1 R4 RE-001201-GP 471B-120J-1-X 12 5% 5W METAL OXIDE FILM 2 R261, R262

(was PCB-QZ010C-PWR2)

20 QSC Audio Products, LLC

RMX850 Channel 2 module (continued)

QSC part # Old QSC part # Description Qty. Notes or Component Reference

RE-002202-GP 4718-220J-2-P RMF 1W 22 5% AT FP 2 R236, R237 RE-082005-GP 471B-821J-1-X RMF 5W 820 OHM 5% AL METAL 2 R257, R258 RE-120007-GP 471B-202J-1-X RMF 5W 2K 5% AL METAL 2 R233, R235 RE-122006-GP 4756-2226-3-06 SVR 2.2K H3 7X7 2 R239, R240 RE-190903-GP 4717-9091-2 RMF 1/2W 9.09K 1% AT 1 R123 RE-210010-GP 4717-103A-2 RMF 1/2W 10.0K 1% AT 2 R122, R222 XF-000190-GP 1804-1030-0 SPRING COIL 2uH 1 L200

Channel 2 SMT parts

CA-056001-GP 150F-560K-J-BD CC 50V 56PF 10% 0805 2 C110, C210 CA-056002-GP 15CG-560J-6-CF CTC 0/30 56P 5% 1206 2 C111, C211 CA-118000-GP 150F-181K-J-BD CC 50V 180PF 5% 0805 4 C101, C103, C201, C203 CA-210011-GP 150H-102J-6-CF CC 100V 0.001µF 5% 1206 1 C214 CA-222007-GP 150F-222K-6-CF 50V .0022UF 10% 1206 1 C215 CA-410013-GP 150F-104K-6-CF CER 2 1206 10% 50V .1UF 3 C100, C102, C104 IC-000212-GP 3131-9730-0 IC NE5517D 1 U10 QD-000201-GP 4804-1480-3 DIODE LL4148 SM 15 D102, D103, D105, D106, D202–D206, D211–D216 QD-000204-GP 4860-0640-3 XISTOR NPN 60V 200MA 3904 SOT-23 2 Q201, Q202 QD-000205-GP 4853-9060-3 XISTOR PNP 40V 0.2A TR3906 SOT-23 2 Q100, Q200 RE-004702-GP 4720-470J-J RMG 1/10W 47 OHM 5% 0805 1 R224 RE-010006-GP 4720-101J-J RMG 1/10W 100 5% 6 R109, R110, R127, R209, R211, R227 RE-027003-GP 4720-271J-J RMG 1/10W 270 OHM 5% 6 R111, R113, R120, R210, R213, R220 RE-082003-GP 4721-821J-6 RMG 1/8W 820 OHM 5% 1206 4 R115, R215, R230, R232 RE-110012-GP 4720-102J-J RMG 1/10W 1K 5% 0805 3 R102, R126, R202 RE-115004-GP 4720-152J-J RMG 1/10W 1.5K 5% 0805 1 R229 RE-133007-GP 4720-332J-J RMG 1/10W 3.3K 5% 0805 1 R24 RE-147001-GP 4720-472J-J RMG 1/10W 4.7K 5% 0805 2 R114, R214 RE-175003-GP 4720-752J-J RMG 1/10W 7.5K 5% 0805 2 R108, R208 RE-210006-GP 4720-103J-J RMG 1/10W 10K 5% 0805 3 R103, R203, R228 RE-210007-GP 4720-103A-J 10K 1% 1/10W THK FLM 0805 8 R100, R101, R105, R106, R200, R201, R205, R206 RE-220005-GP 4720-203A-J RMG 1/10W 20K 1% 0805 4 R117, R121, R217, R221 RE-233001-GP 4721-333J-6 RMG 1/8W 33K 1% 1206 2 R22, R23 RE-239001-GP 4720-393J-J RMG 1/10W 39K 5% 0805 2 R107, R207 RE-247004-GP 4721-473J-6 RMG 1/8W 47K 5% 1206 1 R225 RE-315003-GP 4721-154J-6 RMG 1/8W 150K 5% 1206 2 R104, R204 RE-315004-GP 4721-154A-6 RMG 1/8W 150K 1% 1206 4 R118, R119, R218, R219 RE-339001-GP 4721-394J-6 RMG 1/8W 390K 5% 1206 2 R116, R216

Input Board Assembly

CA-147006-GP 150F-471J-5-OF 470PF 5% 50V CER NPO 4 C1–C4 CO-000204-GP 2113-1337-1 CONN XLR F VERT PLASTIC 2 J101, J201 CO-000234-GP 2113-1335-0 5 POLE INPUT TERMINAL BLOCK 1 J5 CO-000235-GP 2113-1652-0 PHONE JACK 06.4 2 J102, J202 SW-000089-GP 5200-4713-0 10 POLE DIP SWITCH 1 SW1 WC-000194-GP 7010-9860-0 RIBBON CABLE 26 PIN IEC 1 J 1

Output Board Assembly

CO-000236-GP 2113-1336-1 SPEAKON NEUTRIK 4 WIRE 2 J100, J200 PA-000043-00 2113-1338-0 PLATE ASSY,PLX/RMX,OUTPUT,, 1 J103 PL-000055-00 4154-2111-0 OUTPUT POST PLUG FOR CE (RED) 2 For European models only PL-000056-00 4154-2121-0 OUTPUT POST PLUG FOR CE (BLACK) 2 For European models only

(was PCB-QZ010C-INP)

(was PCB-QZ010C-OUT)

RMX Series Technical Service Manual (2RU models) 21 TD-000098-00 rev. C

6.2 RMX1450 Replacement Parts

QSC part # Old QSC part # Description Qty. Notes or Component Reference

Misc.

CH-000194-GP 4134-9101-0 FAN SHROUD RMX 1 CO-000211-GP 2113-1144-0 AC INLET 250V 15A 1 MS-000137-GP 4154-0361-0 FAN GUARD WIRE 76MM RMX 1 MS-000138-GP 8900-9050-1 DC FAN 24V 80X80 (+5V) 1 SW-000088-GP 5200-4717-0 ROCKER POWER SWITCH 1 SW-000091-GP 5200-3531-0 CIRCUIT BREAKER 15A 1 For 120V models SW-000094-GP 5200-4731-0 CIRCUIT BREAKER 8A 1 For 230V models WC-000181-GP 7010-9640-0 AC CORD 15A, 14 AWG, ISA 1 For 120V models WC-000213-GP 7009-8620-0 AC CORD SET CE 1 For 230V models *XF-000116-GP 1806-2506-0 POWER TRANSFORMER, RMX 1450 1 Discontinued; replaced by XF-000316-GP and XF-000317-GP XF-000316-GP 1806-3985+0000 TRANSFORMER, 240V, RMX1450 1 For 230V models XF-000317-GP 1806-3984+0000 TRANSFORMER, 120V, RMX1450 1 For 120V models

WP-008502-00 AC Board Assembly

CA-422005-GP 153R-224K-5-Y1 CM 250V .22UF 10% RL 2 C127, C227 CA-810006-GP 157Q-108M-5-X9E 1000UF 35V 20% ELECTROLYTIC 1 C6 HW-000020-GP 4134-8851-0 FUSE HOLDER 6.3MM 4 REF: F100, F200 IC-000213-GP 3130-9270-0 IC 4N29 1 U2 MS-000124-GP 5120-0061-0 FUSE 12A 250V 6.3 X 32MM 2 F100, F200 MS-000126-GP 5400-0831-0 HEATSINK, BRIDGE RECTIFIER 1 REF: Q3 QD-000200-GP 4840-1760-0 DIODE RECT 1A 200V DB103 1 BR1 QD-000214-GP 4860-2620-5 TR TIP31C SAMSUNG 1 Q3 QD-000227-GP 4840-2150-0 BRIDGE RECT 400V 25A 2 BR100, BR200 RE-000005-GP 8910-0273-0 POLYSWITCH 1.1A 0.15 OHM 1.5W 1 R1 RE-000270-GP 8910-0275-0 NTC 30A 1 OHM 1 R21 RE-012004-GP 4719-121J-1-X RMF 2W 120 OHM 5% 1 R17 RE-120003-GP 4701-202J-C RCF 1/8W 2K 5% ATS 1 R13 RE-168002-GP 4701-682J-C RCF 1/8W 6.8K 5% ATS 2 R9, R14

4701-474J-C RCF 1/8W 470K 5% ATS 1 R12

WP-014502-00 Channel 1 Module Assembly (left)

CA-233004-GP 153F-332J-5-KW CM 50V .0033UF 5% RL 2 C117, C118 CA-322006-GP 153F-223J-5-LQ CM 50V .022UF 5% RL 2 C116, C119 CA-368004-GP 153R-683J-5-WWM 0.068UF 5% 250V FILM DIPPED 1 C124 CA-547008-GP 157R-475M-5-OV 4.7UF 20% 250V ELECTRO RAD 1 C7 CA-647005-GP 157F-476M-5-LU CE 50V 47uF 20% RL 1 C8 CA-833002-GP 8910-0272-0 3300UF 20% 100V ELECT RAD 4 C120–C123 PT-110002-GP 4756-1016-3-06 TRIM POT,100,20 PCNT,0.15W,, 1 R131 QD-000198-GP 3700-4531-G LED 4.7MM GRN W/STAND 1 LD1 QD-000202-GP 4804-0040-1 DIODE IN4004 AL 5 D1, D11, D12, D117, D118 QD-000203-GP 4838-15V6-2 DIOD ZNR 15V 1W SILICON EPIT 2 D8, D15 QD-000206-GP 4804-9340-2 DIOD RECT FAST, IN4934 AT 2 D108, D109 QD-000207-GP 4860-5020-5 XISTOR NPN 250V 0.5A MJE15032 1 Q105 QD-000208-GP 4860-5060-5 TR 2SA1943 T0-3P (L) 3 Q103, Q107, Q109, Q111 QD-000209-GP 4860-5050-5 TR 2SC5200 T0-3P (L) 3 Q104, Q108, Q110, Q112 QD-000210-GP 4860-5030-5 XISTOR PNP 250V MJE15033 1 Q106 QD-000211-GP 4860-8890-0 TR MPS A06VCE 80V NS 1 Q5 QD-000212-GP 4837-5B10-2 DIODE ZENER 1/2W 5.5-5.8V 2 D107, D110 (December 2003 and earlier) QD-000269-GP * DIODE ZENER 5.1V 5% .25W DO-35 2 D107, D110 (January 2004 and later) RE-.02201-GP 471A-022K-5-N 0.22 OHM 5% 3W THK FLM 8 R142, R143, R148, R149, R152, R153, R156, R159 RE-.56006-GP 4719-5R6J-1-X RMF 2W 5.6 OHM 5% 1 R160 RE-.68001-GP 4718-6R8J-1-X RMF 1W 6.8 OHM 5% 2 R146, R147 RE-000250-GP 8910-0488-0 NTC RES 50 OHM 1 R134 RE-000260-GP 8910-0274-0 THERMAL PTC 60C 100 OHM 1 R7 RE-001201-GP 471B-120J-1-X 12 5% 5W METAL OXIDE FILM 2 R161, R162 RE-002202-GP 4718-220J-2-P RMF 1W 22 5% AT FP 2 R136, R137 RE-110011-GP 471B-102J-1-X RMF 5W 1K 5% 2 R157, R158 RE-122006-GP 4756-2226-3-06 SVR 2.2K H3 7X7 2 R139, R140

(was PCB-QZ020C-PSU)

(was PCB-QZ020C-PWR1)

22 QSC Audio Products, LLC

RMX1450 Channel 1 module (continued)

QSC part # Old QSC part # Description Qty. Notes or Component Reference

RE-130003-GP 471B-302J-1-X RMF 5W 3K 5% METAL 2 R133, R135 RE-215006-GP 4719-153J-1-X RMF 2W 15K 5% AL METAL 2 R2, R5 XF-000190-GP 1804-1040-0 SPRING COIL 2UH (14GA WIRE) 1 L100

Channel 1 SMT parts

CA-210011-GP 150H-102J-6-CF CC 100V 0.001U 5% 1206 1 C114 CA-222007-GP 150F-222K-6-CF 50V .0022UF 10% 1206 1 C115 QD-000201-GP 4804-1480-3 DIODE LL4148 SM 15 D2–D7, D9, D14, D104, D111–D116 QD-000204-GP 4860-0640-3 XISTOR NPN 60V 200MA 3904 SOT-23 4 Q8, Q9, Q101, Q102 QD-000205-GP 4853-9060-3 XISTOR PNP 40V 0.2A TR3906 SOT-23 3 Q4, Q6, Q7 QD-000213-GP 4860-5110-3 TR KST42 1 Q1 RE-004702-GP 4720-470J-J RMG 1/10W 47 OHM 5% 0805 2 R25, R124 RE-082003-GP 4721-821J-6 RMG 1/8W 820 OHM 5% 1206 2 R130, R132 RE-115004-GP 4720-152J-J RMG 1/10W 1.5K 5% 0805 1 R129 RE-120004-GP 4720-202J-J RMG 1/10W 2K 1% 0805 [here] 1 R 8 RE-168002-GP 4721-682J-6 RCF 1/8W 6.8K 5% ATS 1 R19 RE-210006-GP 4720-103J-J RMG 1/10W 10K 5% 0805 1 R128 RE-247004-GP 4721-473J-6 RMG 1/8W 47K 5% 1206 1 R125 RE-315003-GP 4721-154J-6 RMG 1/8W 150K 5% 1206 1 R10 RE-322001-GP 4721-224J-6 RMG 1/8W 220K 5% 1206 2 R18, R27 RE-322002-GP 4720-224J-J RMG 1/10W 220K 5% 0805 1 R26 RE-347002-GP 4721-474J-6 RMF 1/8W 470K 5% ATS 1 R15 RE-410002-GP 4721-105J-6 RMG 1/8W 1M 5% 1206 2 R3, R6

WP-014503-00 Channel 2 Module Assembly (right)

CA-233004-GP 153F-332J-5-KW CM 50V .0033UF 5% RL 2 C217, C218 CA-322006-GP 153F-223J-5-LQ CM 50V .022UF 5% RL 2 C216, C219 CA-368004-GP 153R-683J-5-WWM 0.068UF 5% 250V FILM DIPPED 1 C224 CA-415004-GP 153F-154J-5-NLM 0.15U,5%,50V,CM,,RBT,7.5X 4 C108, C109, C208, C209 CA-422006-GP 153F-224J-5-NLM CM 50V 0.22UF 5% RL 2 C107, C207 CA-610020-GP 157F-106M-5-LUN CE 50V 10UF 20% RLT 5 X 11 2 C106, C206 CA-710009-GP 157E-107M-5-KW CE 25V 100UF 20% RL 2 C105, C205 CA-722006-GP 157E-227M-5-PU CE 25V 220uF 20% RL 4 C112, C113, C212, C213 CA-833002-GP 8910-0272-0 3300UF 20% 100V ELECT RAD 4 C220–C223 CO-000222-GP 2101-1991-0 8-PIN IC SOCKET 2 REF: U101, U201 IC-000211-GP 3130-2430-0 IC NE5532 OP AMP 2 U101, U201 PT-110002-GP 4756-1016-3-06 TRIM POT,100,20 PCNT,0.15W,, 1 R231 *PT-225000-GP *4751-0110-0 RES VAR 2.5K RT ANGLE PCB 2 R112, R212 (May 2002 and later) *PT-310006-GP *4750-6200-0 VR V012CPH, D-SHAFT 10K 2 R112, R212 (April 2002 and earlier) QD-000197-GP 3700-4529-R LED 4.7MM RED W/STAND 2 LD100, LD200 QD-000199-GP 3700-4530-Y LED 4.7MM W/STAND YELLOW 2 LD101, LD201 QD-000202-GP 4804-0040-1 DIODE IN4004 AL 4 D10,D13, D217, D218 QD-000203-GP 4838-15V6-2 DIOD ZNR 15V 1W SILICON EPIT 4 D100, D101, D200, D201 QD-000206-GP 4804-9340-2 DIOD RECT FAST, IN4934 AT 2 D208, D209 QD-000207-GP 4860-5020-5 XISTOR NPN 250V 0.5A MJE15032 1 Q205 QD-000208-GP 4860-5060-5 TR 2SA1943 T0-3P (L) 3 Q203, Q207, Q209, Q211 QD-000209-GP 4860-5050-5 TR 2SC5200 T0-3P (L) 3 Q204, Q208, Q210, Q212 QD-000210-GP 4860-5030-5 XISTOR PNP 250V MJE15033 1 Q206 QD-000212-GP 4837-5B10-2 DIODE ZENER 1/2W 5.5-5.8V 2 D207, D210 (December 2003 and earlier) QD-000269-GP * DIODE ZENER 5.1V 5% .25W DO-35 2 D207, D210 (January 2004 and later) RE-.02201-GP 471A-022K-5-N 0.22 OHM 5% 3W THK FLM 8 R242, R243, R248, R249, R252, R253, R256, R259 RE-.56006-GP 4719-5R6J-1-X RMF 2W 5.6 OHM 5% 1 R260 RE-.68001-GP 4718-6R8J-1-X RMF 1W 6.8 OHM 5% 3 R20, R246, R247 RE-000250-GP 8910-0488-0 NTC RES 50 OHM 1 R234 RE-000260-GP 8910-0274-0 THERMAL PTC 60C 100 OHM 1 R 4 RE-001201-GP 471B-120J-1-X 12 5% 5W METAL OXIDE FILM 2 R261, R262 RE-002202-GP 4718-220J-2-P RMF 1W 22 5% AT FP 2 R236, R237 RE-110011-GP 471B-102J-1-X RMF 5W 1K 5% 2 R257, R258 RE-122006-GP 4756-2226-3-06 SVR 2.2K H3 7X7 2 R239, R240 RE-130003-GP 471B-302J-1-X RMF 5W 3K 5% METAL 2 R233, R235 RE-211304-GP 4717-1132-2 RMF 1/2W 11.3K 1% AT 1 R123

(was PCB-QZ020C-PWR2)

RMX Series Technical Service Manual (2RU models) 23 TD-000098-00 rev. C

RMX1450 Channel 2 module (continued)

QSC part # Old QSC part # Description Qty. Notes or Component Reference

RE-213304-GP 4717-1332-2 RMF 1/2W 13.3K 1% AT 2 R122, R222 XF-000190-GP 1804-1040-0 SPRING COIL 2UH (14GA WIRE) 1 L200

Channel 2 SMT Parts

CA-056001-GP 150F-560K-J-BD CC 50V 56PF 10% 0805 2 C110, C210 CA-056002-GP 15CG-560J-6-CF CTC 0/30 56P 5% 1206 2 C111, C211 CA-118000-GP 150F-181K-J-BD CC 50V 180PF 5% 0805 4 C101, C103, C201, C203 CA-210011-GP 150H-102J-6-CF CC 100V 0.001U 5% 1206 1 C214 CA-222007-GP 150F-222K-6-CF 50V .0022UF 10% 1206 1 C215 CA-410013-GP 150F-104K-6-CF CER 2 1206 10% 50V .1UF 3 C100, C102, C104 IC-000212-GP 3131-9730-0 IC NE5517D 1 U10 QD-000201-GP 4804-1480-3 DIODE LL4148 SM 15 D102, D103, D105, D106, D202–D206, D211–D216 QD-000204-GP 4860-0640-3 XISTOR NPN 60V 200MA 3904 SOT-23 2 Q201, Q202 QD-000205-GP 4853-9060-3 XISTOR PNP 40V 0.2A TR3906 SOT-23 2 Q100, Q200 RE-004702-GP 4720-470J-J RMG 1/10W 47 OHM 5% 0805 1 R224 RE-010006-GP 4720-101J-J RMG 1/10W 100 5% 6 R109, R110, R127, R209, R211, R227 RE-027003-GP 4720-271J-J RMG 1/10W 270 OHM 5% 6 R111, R113, R120, R210, R213, R220 RE-082003-GP 4721-821J-6 RMG 1/8W 820 OHM 5% 1206 4 R115, R215, R230, R232 RE-110012-GP 4720-102J-J RMG 1/10W 1K 5% 0805 3 R102, R126, R202 RE-115004-GP 4720-152J-J RMG 1/10W 1.5K 5% 0805 1 R229 RE-133007-GP 4720-332J-J RMG 1/10W 3.3K 5% 0805 1 R24 RE-147001-GP 4720-472J-J RMG 1/10W 4.7K 5% 0805 2 R114, R214 RE-175003-GP 4720-752J-J RMG 1/10W 7.5K 5% 0805 2 R108, R208 RE-210006-GP 4720-103J-J RMG 1/10W 10K 5% 0805 3 R103, R203, R228 RE-210007-GP 4720-103A-J 10K 1% 1/10W THK FLM 0805 8 R100, R101, R105, R106, R200, R201, R205, R206 RE-220005-GP 4720-203A-J RMG 1/10W 20K 1% 0805 4 R117, R121, R217, R221 RE-233001-GP 4721-333J-6 RMG 1/8W 33K 1% 1206 [here] 2 R22, R23 RE-239001-GP 4720-393J-J RMG 1/10W 39K 5% 0805 2 R107, R207 RE-247004-GP 4721-473J-6 RMG 1/8W 47K 5% 1206 1 R225 RE-315004-GP 4721-154A-6 RMG 1/8W 150K 1% 1206 4 R118, R119, R218, R219 RE-315003-GP 4721-154J-6 RMG 1/8W 150K 5% 1206 2 R104, R204 RE-349901-GP 4721-4993-6 499K 1% 1/8W THICK FILM 1206 2 R116, R216

Input Board Assembly

CA-147006-GP 150F-471J-5-OF 470PF 5% 50V CER NPO 4 C1, C2, C3, C4 CO-000204-GP 2113-1337-1 CONN XLR F VERT PLASTIC 2 J101, J201 CO-000235-GP 2113-1652-0 PHONE JACK 06.4 2 J102, J202 SW-000089-GP 5200-4713-0 10 POLE DIP SWITCH 1 SW1 WC-000194-GP 7010-9860-0 RIBBON CABLE 26 PIN IEC 1 J1

Output Board Assembly

CO-000236-GP 2113-1336-1 SPEAKON NEUTRIK 4 WIRE 2 J100, J200 PA-000043-00 2113-1338-0 PLATE ASSY,PLX/RMX,OUTPUT,, 1 J103 PL-000055-00 4154-2111-0 OUTPUT POST PLUG FOR CE (RED) 2 For European models only PL-000056-00 4154-2121-0 OUTPUT POST PLUG FOR CE (BLACK) 2 For European models only

(was PCB-QZ020C-INP)

(was PCB-QZ020C-OUT)

24 QSC Audio Products, LLC

6.3 RMX1850HD Replacement Parts

QSC part # Old QSC part # Description Qty. Notes or Component Reference

Misc.

CH-000194-GP 4134-9101-0 FAN SHROUD RMX 1 CO-000211-GP 2113-1144-0 AC INLET 250V 15A 1 MS-000137-GP 4154-0361-0 FAN GUARD WIRE 76MM RMX 1 MS-000138-GP 8900-9050-1 DC FAN 24V 80X80 (+5V) 1 SW-000088-GP 5200-4717-0 ROCKER POWER SWITCH 1 SW-000091-GP 5200-3531-0 CIRCUIT BREAKER 15A 1 For 120V models SW-000094-GP 5200-4731-0 CIRCUIT BREAKER 8A 1 For 230V models WC-000181-GP 7010-9640-0 AC CORD 15A, 14 AWG, ISA 1 For 120V models WC-000213-GP 7009-8620-0 AC CORD 8A, CE 1 For 230V models *XF-000105-GP 1806-2440-0 XFMR RMX 1850 1 Discontinued; replaced by XF-000320-GP and XF-000321-GP XF-000320-GP 1806-3989+0000 TRANSFORMER, 240V, RMX1850HD 1 For 230V models XF-000321-GP 1806-3988+0000 TRANSFORMER, 120V, RMX1850HD 1 For 120V models

AC Board Assembly

CA-422005-GP 153R-224K-5-Y1 CM 250V .22UF 10% RL 4 C127, C128, C227, C228 CA-810006-GP 157Q-108M-5-X9E 1000UF 35V 20% ELECTROLYTIC 1 C6

153T-473K-5-WS CM 400V 0.047UF 10% RL 1 C10 IC-000213-GP 3130-9270-0 IC 4N29 1 U2 MS-000125-GP 5400-1831-1 HEATSINK FOR RECTIFIER 4 REF: BR100, BR101, BR200, BR201 MS-000126-GP 5400-0831-0 HEATSINK, BRIDGE RECTIFIER 1 REF: Q3 QD-000200-GP 4840-1760-0 DIODE RECT 1A 200V DB103 1 BR1 QD-000214-GP 4860-2620-5 TR TIP31C SAMSUNG 1 Q3 QD-000227-GP 4840-2150-0 BRIDGE RECT 400V 25A 4 BR100, BR101, BR200, BR201 RE-000005-GP 8910-0273-0 POLYSWITCH 1.1A 0.15 OHM 1.5W 1 R1 RE-000270-GP 8910-0275-0 NTC 30A 1 OHM 1 R21 RE-001201-GP 471B-120J-1-X 12 5% 5W METAL OXIDE FILM 2 R28, R29 RE-012004-GP 4719-121J-1-X RMF 2W 120 OHM 5% 1 R17 RE-120003-GP 4701-202J-C RCF 1/8W 2K 5% ATS 1 R13 RE-168002-GP 4701-682J-C RCF 1/8W 6.8K 5% ATS 2 R9, R14

4701-474J-C RCF 1/8W 470K 5% ATS 1 R12

WP-018504-00 Channel 1 Module Assembly (right)

CA-210012-GP 153H-102J-5-IQ CM 100V .001UF 5% RL 5X 2 C131, C231 CA-215004-GP 153R-152J-5-XQ CM 250V .0015UF 5% RL 1 C114 CA-233004-GP 153F-332J-5-KW CM 50V .0033UF 5% RL 2 C172, C179 CA-322006-GP 153F-223J-5-LQ CM 50V .022UF 5% RL 2 C116, C119 CA-368004-GP 153R-683J-5-WWM 0.068UF 5% 250V FILM DIPPED 2 C124, C126 CA-410018-GP 153R-104J-5-YRM CM 250V .1UF 5% RL 2 C174, C175 CA-415004-GP 153F-154J-5-NLM 0.15U,5%,50V,CM,,RBT,7.5X 4 C108, C109, C208, C209 CA-422006-GP 153F-224J-5-NLM CM 50V 0.22UF 5% RL 2 C107, C207 CA-610009-GP 157Q-106M-5-IU CE 35V 10UF 20% RL 5 X 11 1 C171 CA-622007-GP 157E-226M-5-IUN CE 25NP 22UF 20% RL 5X11 1 C129 CA-647006-GP 157D-476M-5-LUN CE 16NP 47UF 20% RL 2 C106, C206 CA-710009-GP 157E-107M-5-KW CE 25V 100UF 20% RL 4 C105, C173, C180, C205 CA-710010-GP 157D-107M-5-OUN CE 16NP 100UF 20% RL 8X11 2 C125, C225 CA-722006-GP 157E-227M-5-PU CE 25V 220uF 20% RL 4 C112, C113, C212, C213 CA-912001-GP 8910-0494-0 12000UF,20 PCNT,63V,CE,RL,, 4 C120–C123 CO-000217-GP 2102-130S-003 CONN 13 PIN STRAIGHT WAFER 1 J104 CO-000222-GP 2101-1991-0 8-PIN IC SOCKET 2 REF: U101, U201 CO-000223-GP 2101-2081-0 26-PIN DUAL ROW IEC 1 J103 HW-000020-GP 4134-8851-0 FUSE HOLDER 6.3MM 2 F100 IC-000211-GP 3130-2430-0 IC NE5532 OP AMP 2 U101, U201 MS-000127-GP 5120-0501-0 FUSE T20A/125V 6.4X32MM 1 F100 PT-110002-GP 4756-1016-3-06 TRIM POT,100,20 PCNT,0.15W,, 1 R131 PT-225000-GP 4751-0110-0 RES VAR 2.5K RT ANGLE PCB 2 R112, R212 QD-000197-GP 3700-4529-R LED 4.7MM RED W/STAND 2 LD100, LD200 QD-000199-GP 3700-4530-Y LED 4.7MM W/STAND YELLOW 2 LD101, LD201

(was PCB-QZ101C-PSU)

(was PCB-QZ100C-PWR2)

RMX Series Technical Service Manual (2RU models) 25 TD-000098-00 rev. C

RMX1850HD Channel 1 module (continued)

QSC part # Old QSC part # Description Qty. Notes or Component Reference

QD-000202-GP 4804-0040-1 DIODE IN4004 AL 4 D10, D12, D117, D118 QD-000203-GP 4838-15V6-2 DIOD ZNR 15V 1W SILICON EPIT 4 D100, D101, D200, D201 QD-000206-GP 4804-9340-2 DIOD RECT FAST, IN4934 AT 2 D108, D109 QD-000207-GP 4860-5020-5 XISTOR NPN 250V 0.5A MJE15032 1 Q105 QD-000208-GP 4860-5060-5 TR 2SA1943 T0-3P (L) 3 Q103, Q107, Q109, Q111 QD-000209-GP 4860-5050-5 TR 2SC5200 T0-3P (L) 3 Q104, Q108, Q110, Q112 QD-000210-GP 4860-5030-5 XISTOR PNP 250V MJE15033 1 Q106 *QD-000212-GP 4837-5B10-2 DIODE ZENER 1/2W 5.5-5.8 2 D107, D110 (December 2003 and earlier) QD-000215-GP 4840-2190-0 DIODE MUR1520 15A 200V 2 D175, D176 QD-000218-GP 4837-3B20-2 DIOD ZNR 3.8-4.0V 1/2 HZ SER 1 D170 QD-000219-GP 4838-10V6-2 DIODE ZENER 1.3W 10V TEMIC 1 D174 QD-000220-GP 4838-12V6-2 DIODE ZENER 1W 12V AT TEMIC 1 D178 *QD-000221-GP 8910-0482-0 SRV-TRIAC 600V 40A MAC224 A8 1 Q113 (replaced by SG-000522-00 kit) *QD-000261-GP * TRIAC 600V 40A BTA41-600B,TOP3 1 Q113 (part of SG-000522-00 kit for replacing MAC224

triac) *QD-000269-GP * DIODE ZENER 5.1V 5% .25W DO-35 2 D107, D110 (January 2004 and later) QD-000347-GP 490F-Z440-5 FETN,60V,50A,150W,,, 2 Q170, Q174 QD-000350-10 4860-5250-5 TR 2N5064 SCR 2 D119, D120 RE-.02201-GP 471A-022K-5-N 0.22 OHM 5% 3W THK FLM 8 R142, R143, R148, R149, R152, R153, R156, R159 RE-.15003-GP 4719-1R5J-1-X 1.5 OHM 5% 2W THK FLM 2 R181, R182 RE-.33001-GP 4718-3R3J-1-X RMF 1W 3.3 OHM 5% 3 R146, R147, R20 RE-.56006-GP 4719-5R6J-1-X RMF 2W 5.6 OHM 5% 1 R160 RE-000250-GP 8910-0488-0 NTC RES 50 OHM 1 R134 RE-000260-GP 8910-0274-0 THERMAL PTC 60C 100 OHM 1 R4 RE-001005-GP 4715-100J-2 RMF 1/4W 10 OHM 5% 1 R163 RE-001201-GP 471B-120J-1-X 12 5% 5W METAL OXIDE FILM 4 R154, R155, R161, R162 RE-002202-GP 4718-220J-2-P RMF 1W 22 5% AT FP 2 R136, R137 RE-010008-GP 4715-101J-2 RMF 1/4W 100 OHM 5% 1 R164 RE-122006-GP 4756-2226-3-06 SVR 2.2K H3 7X7 2 R139, R140 RE-122008-GP 471B-222J-1-X RMF 5W 2.2K 5% METAL 3 R157, R158, R198 RE-151003-GP 471B-512J-1-X RMF 5W 5.1K 5% AL METAL 2 R180, R188 RE-182002-GP 471B-822J-1-X RMF 5W 8.2K 5% AL METAL 4 R118, R119, R133, R135 RE-212002-GP 4718-123J-2-X RMF 1W 12K 5% AT METAL 2 R177, R194 RE-215007-GP 4718-153J-2-X RMF 1W 15K 5% METAL 1 R165 RE-223202-GP 4717-2322-2 RMF 1/2W 23.2K 1% AT 3 R122, R123, R222 XF-000190-GP 1804-1040-0 SPRING COIL 2UH (14GA WIRE) 1 L100

Channel 1 SMT parts

CA-047005-GP 150F-470J-J-BD CC 50V 47PF 5% 0805 5 C110, C170, C176, C177, C210 CA-110004-GP 150F-101K-J-BD CC 50V 100P 10% 0805 1 C132 CA-110005-GP 150F-101J-J-BD CC 50V 100PF 5% 0805 1.2 1 C130 CA-118000-GP 150F-181K-J-BD CC 50V 180PF 5% 0805 4 C101, C103, C201, C203 CA-222007-GP 150F-222K-6-CF 50V .0022UF 10% 1206 1 C115 CA-310009-GP 150F-103M-J-BD CC 50V 0.01uF 20% 0805 1 1 C181 CA-410016-GP 150F-104M-6-CF CC 50V 0.1uF 20% 1206 1. 2 C104, C178

15CG-270J-6-CF CTC 0/30 27P 5% 1206 2 C111, C211 IC-000212-GP 3131-9730-0 IC NE5517D 1 U10 IC-000214-GP 3130-9240-0 LM311M VOLTAGE 2 U170, U171 QD-000201-GP 4804-1480-3 DIODE LL4148 SM 18 D102–D106, D111–D116, D171, D173, D177, D202, D203,

D205, D206 QD-000204-GP 4860-0640-3 XISTOR NPN 60V 200MA 3904 SOT-23 4 Q101, Q102, Q171, Q173 QD-000205-GP 4853-9060-3 XISTOR PNP 40V 0.2A TR3906 SOT-23 4 Q100, Q172, Q175, Q200 RE-004702-GP 4720-470J-J RMG 1/10W 47 OHM 5% 0805 2 R170, R189 RE-007506-GP 4720-750J-J RMG 1/10W 75 OHM 5% 0805 1 R124 RE-010006-GP 4720-101J-J RMG 1/10W 100 5% 6 R109, R110, R127, R209, R210, R227 RE-027003-GP 4720-271J-J RMG 1/10W 270 OHM 5% 4 R113, R196, R213, R296 RE-039001-GP 4720-391J-J RMG 1/10W 390R 5% 0805 2 R120, R220 RE-082003-GP 4721-821J-6 RMG 1/8W 820 OHM 5% 1206 4 R115, R130, R132, R215 RE-082004-GP 4720-821J-J RMG 1/10W 820R 5% 0805 2 R111, R211 RE-110012-GP 4720-102J-J RMG 1/10W 1K 5% 0805 3 R102, R126, R202 RE-115004-GP 4720-152J-J RMG 1/10W 1.5K 5% 0805 1 R129

26 QSC Audio Products, LLC

RMX1850HD Channel 1 module (continued)

QSC part # Old QSC part # Description Qty. Notes or Component Reference

RE-120004-GP 4720-202J-J RMG 1/10W 2K 1% 0805 2 R190, R195 RE-122007-GP 4720-222J-J RMG 1/10W 2.2K 5% 0805 1 R191 RE-130103-GP 4720-3011-J RMG 1/10W 3.01K 1% 0805 2 R24, R175 RE-147001-GP 4720-472J-J RMG 1/10W 4.7K 5% 0805 8 R114, R138, R174, R179, R187, R193, R214, R238 RE-159003-GP 4720-592A-J 5.9K 1% 1/10W THK FLM 0805 2 R171, R184 RE-175003-GP 4720-752J-J RMG 1/10W 7.5K 5% 0805 2 R108, R208 RE-210006-GP 4720-103J-J RMG 1/10W 10K 5% 0805 3 R103, R128, R203 RE-210007-GP 4720-103A-J 10K 1% 1/10W THK FLM 0805 8 R100, R101, R105, R106, R200, R201, R205, R206 RE-212001-GP 4720-123J-J RMG 1/10W 12K 5% 0805 1 R176 RE-224001-GP 4720-243J-J 24.0K 1% 1/10W THK FLM 0805 4 R117, R121, R217, R221 RE-239001-GP 4720-393J-J RMG 1/10W 39K 5% 0805 2 R107, R207 RE-247004-GP 4721-473J-6 RMG 1/8W 47K 5% 1206 1 R125 RE-247005-GP 4720-473J-J RMG 1/10W 47K 5% 0805 1 R183 RE-268003-GP 4721-683A-6 RMG 1/8W 68K 1% 1206 4 R22A, R22B, R23A, R23B RE-315003-GP 4721-154J-6 RMG 1/8W 150K 5% 1206 6 R104, R173, R178, R186, R192, R204 RE-346401-GP 4721-4643-6 464K 1% 1/8W THK FLM 1206 3 R166, R167, R266 RE-347003-GP 4720-474J-J RMG 1/10W 470K 5% 0805 2 R172, R185

4721-101J-6 RMG 1/8W 100R 5% 1206 1 R197 4721-824J-6 RMG 1/8W 820K 5% 1206 2 R116, R216

WP-018503-00 Channel 2 Module Assembly (left)

CA-215004-GP 153R-152J-5-XQ CM 250V .0015UF 5% RL 1 C214 CA-233004-GP 153F-332J-5-KW CM 50V .0033UF 5% RL 2 C272, C279 CA-322006-GP 153F-223J-5-LQ CM 50V .022UF 5% RL 2 C216, C219 CA-368004-GP 153R-683J-5-WWM 0.068UF 5% 250V FILM DIPPED 2 C224, C226 CA-410018-GP 153R-104J-5-YRM CM 250V .1UF 5% RL 2 C274, C275 CA-622007-GP 157E-226M-5-IUN CE 25NP 22UF 20% RL 5X11 1 C229 CA-647005-GP 157F-476M-5-LU CE 50V 47UF 20% RL 1 C8 CA-610009-GP 157Q-106M-5-IU CE 35V 10UF 20% RL 5 X 11 1 C271 CA-710009-GP 157E-107M-5-KW CE 25V 100UF 20% RL 2 C273, C280 CA-547008-GP 157R-475M-5-OV 4.7UF 20% 250V ELECTRO RAD 1 C7 CA-912001-GP 8910-0494-0 12000UF,20 PCNT,63V,CE,RL,, 4 C220–C223 CO-000214-GP 2102-031S-004 CONN 3 PIN STRAIGHT WAFER 1 J257 CO-000217-GP 2102-130S-003 CONN 13 PIN STRAIGHT WAFER 1 J204 HW-000020-GP 4134-8851-0 FUSE HOLDER 6.3MM 2 REF: F200 MS-000127-GP 5120-0501-0 FUSE T20A/125V 6.4X32MM 1 F200 PT-110002-GP 4756-1016-3-06 TRIM POT,100,20 PCNT,0.15W,, 1 R231 QD-000198-GP 3700-4531-G LED 4.7MM GRN W/STAND 1 LD1 QD-000202-GP 4804-0040-1 DIODE IN4004 AL 5 D1, D11, D13, D217, D218 QD-000203-GP 4838-15V6-2 DIOD ZNR 15V 1W SILICON EPIT 2 D8, D15 QD-000206-GP 4804-9340-2 DIOD RECT FAST, IN4934 AT 2 D208, D209 QD-000207-GP 4860-5020-5 XISTOR NPN 250V 0.5A MJE15032 1 Q205 QD-000208-GP 4860-5060-5 TR 2SA1943 T0-3P (L) 3 Q203, Q207, Q209, Q211 QD-000209-GP 4860-5050-5 TR 2SC5200 T0-3P (L) 3 Q204, Q208, Q210, Q212 QD-000210-GP 4860-5030-5 XISTOR PNP 250V MJE15033 1 Q206 QD-000211-GP 4860-8890-0 TR MPS A06VCE 80V NS 1 Q5 *QD-000212-GP 4837-5B10-2 DIODE ZENER 1/2W 5.5-5.8V 2 D207, D210 (December 2003 and earlier) QD-000215-GP 4840-2190-0 DIODE MUR1520 15A 200V 2 D275, D276 QD-000218-GP 4837-3B20-2 DIOD ZNR 3.8-4.0V 1/2 HZ SER 1 D270 QD-000219-GP 4838-10V6-2 DIODE ZENER 1.3W 10V TEMIC 1 D274 QD-000220-GP 4838-12V6-2 DIODE ZENER 1W 12V AT TEMIC 1 D278 *QD-000221-GP 8910-0482-0 SRV-TRIAC 600V 40A MAC224 A8 1 Q213 (replaced by SG-000522-00 kit) *QD-000269-GP * DIODE ZENER 5.1V 5% .25W DO-35 2 D207, D210 (January 2004 and later) QD-000347-GP 490F-Z440-5 FETN,60V,50A,150W,,, 2 Q270, Q274 QD-000350-10 4860-5250-5 TR 2N5064 SCR 2 D219, D220 RE-.02201-GP 471A-022K-5-N 0.22 OHM 5% 3W THK FLM 8 R242, R243, R248, R249, R252, R253, R256, R259 RE-.15003-GP 4719-1R5J-1-X 1.5 OHM 5% 2W THK FLM 2 R281, R282 RE-.33001-GP 4718-3R3J-1-X RMF 1W 3.3 OHM 5% 2 R246, R247 RE-.56006-GP 4719-5R6J-1-X RMF 2W 5.6 OHM 5% 1 R260 RE-000250-GP 8910-0488-0 NTC RES 50 OHM 1 R234 RE-000260-GP 8910-0274-0 THERMAL PTC 60C 100 OHM 1 R 7

(was PCB-QZ100C-PWR1)

RMX Series Technical Service Manual (2RU models) 27 TD-000098-00 rev. C

RMX1850HD Channel 2 module (continued)

QSC part # Old QSC part # Description Qty. Notes or Component Reference

RE-001201-GP 471B-120J-1-X 12 5% 5W METAL OXIDE FILM 4 R254, R255, R261, R262 RE-002202-GP 4718-220J-2-P RMF 1W 22 5% AT FP 2 R236, R237 RE-001005-GP 4715-100J-2 RMF 1/4W 10 OHM 5% 1 R263 RE-010008-GP 4715-101J-2 RMF 1/4W 100 OHM 5% 1 R264 RE-122006-GP 4756-2226-3-06 SVR 2.2K H3 7X7 2 R239, R240 RE-122008-GP 471B-222J-1-X RMF 5W 2.2K 5% METAL 3 R257, R258, R298 RE-151003-GP 471B-512J-1-X RMF 5W 5.1K 5% AL METAL 2 R280, R288 RE-182002-GP 471B-822J-1-X RMF 5W 8.2K 5% AL METAL 4 R218, R219, R233, R235 RE-212002-GP 4718-123J-2-X RMF 1W 12K 5% AT METAL 2 R277, R294 RE-215007-GP 4718-153J-2-X RMF 1W 15K 5% METAL 1 R265 RE-233002-GP 4719-333J-2-X RMF 2W 33K 5% METAL 2 R2, R5 XF-000190-GP 1804-1040-0 SPRING COIL 2UH (14GA WIRE) 1 L200

Channel 2 SMT Parts

CA-047005-GP 150F-470J-J-BD CC 50V 47PF 5% 0805 3 C270, C276, C277 CA-110004-GP 150F-101K-J-BD CC 50V 100P 10% 0805 1 C 9 CA-222007-GP 150F-222K-6-CF 50V .0022UF 10% 1206 1 C215 CA-310009-GP 150F-103M-J-BD CC 50V 0.01uF 20% 0805 1 1 C281 CA-410014-GP 150F-104M-J-BD 0.1UF 10% 50V CER X7R 0805 1 C11 CA-410016-GP 150F-104M-6-CF CC 50V 0.1uF 20% 1206 1. 1 C278 IC-000214-GP 3130-9240-0 LM311M VOLTAGE 2 U270, U271 QD-000201-GP 4804-1480-3 DIODE LL4148 SM 18 D2–D7, D9, D14, D204, D211–D216, D271, D273, D277 QD-000204-GP 4860-0640-3 XISTOR NPN 60V 200MA 3904 SOT-23 6 Q8, Q9, Q201, Q202, Q271, Q273 QD-000205-GP 4853-9060-3 XISTOR PNP 40V 0.2A TR3906 SOT-23 5 Q4, Q6, Q7, Q272, Q275 QD-000213-GP 4860-5110-3 TR KST42 1 Q1 RE-004702-GP 4720-470J-J RMG 1/10W 47 OHM 5% 0805 3 R25, R270, R289 RE-007506-GP 4720-750J-J RMG 1/10W 75 OHM 5% 0805 1 R224 RE-082003-GP 4721-821J-6 RMG 1/8W 820 OHM 5% 1206 2 R230, R232 RE-115004-GP 4720-152J-J RMG 1/10W 1.5K 5% 0805 1 R229 RE-120004-GP 4720-202J-J RMG 1/10W 2K 1% 0805 3 R8, R290, R295 RE-122007-GP 4720-222J-J RMG 1/10W 2.2K 5% 0805 1 R291 RE-130103-GP 4720-3011-J RMG 1/10W 3.01K 1% 0805 1 R275 RE-147001-GP 4720-472J-J RMG 1/10W 4.7K 5% 0805 4 R274, R279, R287, R293 RE-159003-GP 4720-592A-J 5.9K 1% 1/10W THK FLM 0805 2 R271, R284 RE-168002-GP 4721-682J-6 RCF 1/8W 6.8K 5% ATS 1 R19 RE-210006-GP 4720-103J-J RMG 1/10W 10K 5% 0805 1 R228 RE-212001-GP 4720-123J-J RMG 1/10W 12K 5% 0805 1 R276 RE-247004-GP 4721-473J-6 RMG 1/8W 47K 5% 1206 1 R225 RE-247005-GP 4720-473J-J RMG 1/10W 47K 5% 0805 1 R283 RE-315003-GP 4721-154J-6 RMG 1/8W 150K 5% 1206 5 R10, R273, R278, R286, R292 RE-322001-GP 4721-224J-6 RMG 1/8W 220K 5% 1206 2 R18, R26 RE-330001-GP 4721-334J-6 RMG 1/8W 330K 5% 1206 1 R27 RE-346401-GP 4721-4643-6 464K 1% 1/8W THK FLM 1206 1 R15 RE-347003-GP 4720-474J-J RMG 1/10W 470K 5% 0805 2 R272, R285 RE-410002-GP 4721-105J-6 RMG 1/8W 1M 5% 1206 2 R3, R6

4721-101J-6 RMG 1/8W 100R 5% 1206 1 R30

WP-002455-00 Input Board Assembly

CA-147006-GP 150F-471J-5-OF 470PF 5% 50V CER NPO 4 C1, C2, C3, C4 CO-000204-GP 2113-1337-1 CONN XLR F VERT PLASTIC 2 J101, J201 CO-000235-GP 2113-1652-0 PHONE JACK 06.4 2 J102, J202 SW-000089-GP 5200-4713-0 10 POLE DIP SWITCH 1 SW1 WC-000194-GP 7010-9860-0 RIBBON CABLE 26 PIN IEC 1 J1

WP-002452-00 Output Board Assembly

CO-000236-GP 2113-1336-1 SPEAKON NEUTRIK 4 WIRE 2 J100, J200 PA-000043-00 2113-1338-0 PLATE ASSY,PLX/RMX,OUTPUT,, 1 J103 PL-000055-00 4154-2111-0 OUTPUT POST PLUG FOR CE (RED) 2 For European models only PL-000056-00 4154-2121-0 OUTPUT POST PLUG FOR CE (BLACK) 2 For European models only

(was PCB-QZ100C-INP)

(was PCB-QZ100C-OUT)

28 QSC Audio Products, LLC

6.4 RMX2450 Replacement Parts

QSC part # Old QSC part # Description Qty. Notes or Component Reference

Misc.

CO-000211-GP 2113-1144-0 IEC POWER INLET 1 CH-000194-GP 4134-9101-0 METAL WIND GUIDE 1 MS-000137-GP 4154-0361-0 FAN GUIDE 1 MS-000138-GP 8900-9050-1 DC FAN 24V 80X80 (+5V) 1 SW-000088-GP 5200-4717-0 ROCKER POWER SWITCH 1 SW-000091-GP 5200-3531-0 CIRCUIT BREAKER 15A 1 For 120V models SW-000094-GP 5200-4731-0 CIRCUIT BREAKER 8A 1 For 230V models WC-000181-GP 7010-9640-0 AC CORD SET 15A 1 For 120V models WC-000213-GP 7009-8620-0 PWR CORD, 230V (EURO) 1 For 230V models *XF-000115-GP 1806-2507-0 XFMR RMX 2450 1 Discontinued; replaced by XF-000318-GP and XF-000319-GP XF-000318-GP 1806-3987+0000 TRANSFORMER, 240V, RMX2450 1 For 230V models XF-000319-GP 1806-3986+0000 TRANSFORMER, 120V, RMX2450 1 For 120V models

AC Board Assembly

CA-422005-GP 153R-224K-5-Y1 CM 250V .22UF 10% RL 4 C127, C128, C227, C228 CA-810006-GP 157Q-108M-5-X9E 1000UF 35V 20% ELECTROLYTIC 1 C6

153T-473K-5-WS CM 400V 0.047UF 10% RL 1 C10 IC-000213-GP 3130-9270-0 IC 4N29 1 U2 MS-000125-GP 5400-1831-1 HEATSINK FOR RECTIFIER 4 REF: BR100, BR101, BR200, BR201 MS-000126-GP 5400-0831-0 HEATSINK, BRIDGE RECTIFIER 1 REF: Q3 QD-000200-GP 4840-1760-0 DIODE RECT 1A 200V DB103 1 BR1 QD-000214-GP 4860-2620-5 TR TIP31C SAMSUNG 1 Q3 QD-000227-GP 4840-2150-0 BRIDGE RECT 400V 25A 4 BR100, BR101, BR200, BR201 RE-000005-GP 8910-0273-0 POLYSWITCH 1.1A 0.15 OHM 1.5W 1 R1 RE-000270-GP 8910-0275-0 NTC 30A 1 OHM 1 R21 RE-001201-GP 471B-120J-1-X 12 5% 5W METAL OXIDE FILM 2 R28, R29 RE-012004-GP 4719-121J-1-X RMF 2W 120 OHM 5% 1 R17 RE-120003-GP 4701-202J-C RCF 1/8W 2K 5% ATS 1 R13 RE-168002-GP 4701-682J-C RCF 1/8W 6.8K 5% ATS 2 R9, R14 RE-210006-GP 4720-103J-J RMG 1/10W 10K 5% 0805 4 R31–R34 (January 2002 and later)

4701-474J-C RCF 1/8W 470K 5% ATS 1 R12

WP-002454-00 Channel 1 Module Assembly (right)

CA-210012-GP 153H-102J-5-IQ CM 100V .001UF 5% RL 5X 2 C131, C231 CA-215004-GP 153R-152J-5-XQ CM 250V 0.0015UF 5% RL 1 C114 CA-233004-GP 153F-332J-5-KW CM 50V .0033UF 5% RL 2 C172, C179 CA-322006-GP 153F-223J-5-LQ CM 50V .022UF 5% RL 2 C116, C119 CA-368004-GP 153R-683J-5-WWM 0.068UF 5% 250V FILM DIPPED 2 C124, C126 CA-410018-GP 153R-104J-5-YRM CM 250V .1UF 5% RL 2 C174, C175 CA-415004-GP 153F-154J-5-NLM 0.15U,5%,50V,CM,,RBT,7.5X 4 C108, C109, C208, C209 CA-422006-GP 153F-224J-5-NLM CM 50V 0.22UF 5% RL 2 C107, C207 CA-610009-GP 157Q-106M-5-IU CE 35V 10UF 20% RL 5 X 11 1 C171 CA-622007-GP 157E-226M-5-IUN CE 25V 22uF 20% RL 5X11 1 C129 CA-647006-GP 157D-476M-5-LUN CE 16NP 47UF 20% RL 2 C106, C206 CA-710009-GP 157E-107M-5-KW CE 25V 100UF 20% RL 4 C105, C173, C180, C205 CA-710010-GP 157D-107M-5-OUN CE 16NP 100UF 20% RL 8X11 2 C125, C225 CA-722006-GP 157E-227M-5-PU CE 25V 220UF 20% RL 4 C112, C113, C212, C213 CA-912001-GP 8910-0494-0 12000UF,20 PCNT,63V,CE,RL,, 4 C120–C123 CO-000217-GP 2102-130S-003 CONN 13 PIN STRAIGHT WAFER 1 J104 CO-000222-GP 2101-1991-0 8-PIN IC SOCKET 2 REF: U101, U201 CO-000223-GP 2101-2081-0 26-PIN DUAL ROW IEC 1 J103 HW-000020-GP 4134-8851-0 FUSE HOLDER 6.3MM 2 F100 IC-000211-GP 3130-2430-0 IC NE5532 OP AMP 2 U101, U201 MS-000127-GP 5120-0501-0 FUSE T20A/125V 6.4X32MM 1 F100 PT-110002-GP 4756-1016-3-06 TRIM POT,100,20 PCNT,0.15W,, 1 R131 *PT-225000-GP *4751-0110-0 RES VAR 2.5K RT ANGLE PCB 2 R112, R212 (May 2002 and later) *PT-310006-GP *4750-6200-0 VR V012CPH, D-SHAFT 10K 2 R112, R212 (April 2002 and earlier) QD-000197-GP 3700-4529-R LED 4.7MM RED W/STAND 2 LD100, LD200 QD-000199-GP 3700-4530-Y LED 4.7MM W/STAND YELLOW 2 LD101, LD201

(was PCB-QZ030C-PSU)

(was PCB-QZ030C-PWR2)

RMX Series Technical Service Manual (2RU models) 29 TD-000098-00 rev. C

RMX2450 Channel 1 module (continued)

QSC part # Revised QSC # Description Qty. Notes or Component Reference

QD-000202-GP 4804-0040-1 DIODE IN4004 AL 4 D10, D12, D117, D118 QD-000203-GP 4838-15V6-2 DIOD ZNR 15V 1W SILICON EPIT 4 D100, D101, D200, D201 QD-000206-GP 4804-9340-2 DIOD RECT FAST, IN4934 AT 2 D108, D109 QD-000207-GP 4860-5020-5 XISTOR NPN 250V 0.5A MJE15032 1 Q105 QD-000208-GP 4860-5060-5 TR 2SA1943 T0-3P (L) 3 Q103, Q107, Q109, Q111 QD-000209-GP 4860-5050-5 TR 2SC5200 T0-3P (L) 3 Q104, Q108, Q110, Q112 QD-000210-GP 4860-5030-5 XISTOR PNP 250V MJE15033 1 Q106 *QD-000212-GP *4837-5B10-2 DIODE ZENER 1/2W 5.5-5.8V 2 D107, D110 (December 2003 and earlier) QD-000215-GP 4840-2190-0 DIODE MUR1520 15A 200V 2 D175, D176 QD-000218-GP 4837-3B20-2 DIOD ZNR 3.8-4.0V 1/2 HZ SER 1 D170 QD-000219-GP 4838-10V6-2 DIODE ZENER 1.3W 10V TEMIC 1 D174 QD-000220-GP 4838-12V6-2 DIODE ZENER 1W 12V AT TEMIC 1 D178 *QD-000221-GP 8910-0482-0 SRV-TRIAC 600V 40A MAC224 A8 1 Q113 (replaced by SG-000522-00 kit) *QD-000261-GP * TRIAC 600V 40A BTA41-600B,TOP3 1 Q113 (part of SG-000522-00 kit for replacing MAC224

triac) *QD-000269-GP * DIODE ZENER 5.1V 5% .25W DO-35 2 D107, D110 (January 2004 and later) QD-000347-GP 490F-Z440-5 FETN,60V,50A,150W,,, 2 Q170, Q174 QD-000350-10 4860-5250-5 TR 2N5064 SCR 2 D119, D120 RE-.02201-GP 471A-022K-5-N 0.22 OHM 5% 3W THK FLM 8 R142, R143, R148, R149, R152, R153, R156, R159 RE-.15003-GP 4719-1R5J-1-X 1.5 OHM 5% 2W THK FLM 2 R181, R182 RE-.33001-GP 4718-3R3J-1-X RMF 1W 3.3 OHM 5% 3 R146, R147, R20 RE-.56006-GP 4719-5R6J-1-X RMF 2W 5.6 OHM 5% 1 R160 RE-000250-GP 8910-0488-0 NTC RES 50 OHM 1 R134 RE-000260-GP 8910-0274-0 THERMAL PTC 60C 100 OHM 1 R4 RE-001005-GP 4715-100J-2 RMF 1/4W 10 OHM 5% 1 R163 RE-001201-GP 471B-120J-1-X 12 5% 5W METAL OXIDE FILM 4 R154, R155, R161, R162 RE-002202-GP 4718-220J-2-P RMF 1W 22 5% AT FP 2 R136, R137 RE-010008-GP 4715-101J-2 RMF 1/4W 100 OHM 5% 1 R164 RE-122006-GP 4756-2226-3-06 SVR 2.2K H3 7X7 2 R139, R140 RE-122008-GP 471B-222J-1-X RMF 5W 2.2K 5% METAL 3 R157, R158, R198 RE-151003-GP 471B-512J-1-X RMF 5W 5.1K 5% AL METAL 2 R180, R188 RE-182002-GP 471B-822J-1-X RMF 5W 8.2K 5% AL METAL 4 R118, R119, R133, R135 RE-212002-GP 4718-123J-2-X RMF 1W 12K 5% AT METAL 2 R177, R194 RE-215007-GP 4718-153J-2-X RMF 1W 15K 5% METAL 1 R165 RE-223202-GP 4717-2322-2 RMF 1/2W 23.2K 1% AT 3 R122, R123, R222 XF-000190-GP 1804-1040-0

Channel 1 SMT parts

CA-027003-GP 15CG-270J-6-CF CTC 0/30 27P 5% 1206 2 C111, C211 CA-047005-GP 150F-470J-J-BD CC 50V 47PF 5% 0805 5 C110, C170, C176, C177, C210 CA-110004-GP 150F-101K-J-BD CC 50V 100P 10% 0805 1 C132 CA-110005-GP 150F-101J-J-BD CC 50V 100PF 5% 0805 1.2 1 C130 CA-118000-GP 150F-181K-J-BD CC 50V 180PF 5% 0805 4 C101, C103, C201, C203 CA-222007-GP 150F-222K-6-CF CC 50V 2200pF 10% 1206 1 1 C115 CA-310009-GP 150F-103M-J-BD CC 50V 0.01uF 20% 0805 1 1 C181 CA-410016-GP 150F-104M-6-CF CC 50V 0.1uF 20% 1206 1. 2 C104, C178 IC-000212-GP 3131-9730-0 IC NE5517D 1 U10 IC-000214-GP 3130-9240-0 LM311M VOLTAGE 2 U170, U171 QD-000201-GP 4804-1480-3 DIODE LL4148 SM 18 D102–D106, D111–D116, D171, D173, D177, D202, D203,

QD-000204-GP 4860-0640-3 XISTOR NPN 60V 200MA 3904 SOT-23 4 Q101, Q102, Q171, Q173 QD-000205-GP 4853-9060-3 XISTOR PNP 40V 0.2A TR3906 SOT-23 4 Q100, Q172, Q175, Q200 RE-004702-GP 4720-470J-J RMG 1/10W 47 OHM 5% 0805 2 R170, R189 RE-007506-GP 4720-750J-J RMG 1/10W 75 OHM 5% 0805 1 R124 RE-010006-GP 4720-101J-J RMG 1/10W 100 5% 6 R109, R110, R127, R209, R210, R227 RE-027003-GP 4720-271J-J RMG 1/10W 270 OHM 5% 4 R113, R196, R213, R296 RE-039001-GP 4720-391J-J RMG 1/10W 390R 5% 0805 2 R120, R220 RE-082003-GP 4721-821J-6 RMG 1/8W 820 OHM 5% 1206 4 R115, R130, R132, R215 RE-082004-GP 4720-821J-J RMG 1/10W 820R 5% 0805 2 R111, R211 RE-110012-GP 4720-102J-J RMG 1/10W 1K 5% 0805 3 R102, R126, R202 RE-115004-GP 4720-152J-J RMG 1/10W 1.5K 5% 0805 1 R129 RE-120004-GP 4720-202J-J RMG 1/10W 2K 1% 0805 2 R190, R195

SPRING COIL 2UH (14GA WIRE) 1 L100

D205, D206

30 QSC Audio Products, LLC

RMX2450 Channel 1 module (continued)

QSC part # Revised QSC # Description Qty. Notes or Component Reference

RE-122007-GP 4720-222J-J RMG 1/10W 2.2K 5% 0805 1 R191 RE-130103-GP 4720-3011-J RMG 1/10W 3.01K 1% 0805 2 R24, R175 RE-147001-GP 4720-472J-J RMG 1/10W 4.7K 5% 0805 8 R114, R138, R174, R179, R187, R193, R214, R238 RE-159003-GP 4720-592A-J 5.9K 1% 1/10W THK FLM 0805 2 R171, R184 RE-175003-GP 4720-752J-J RMG 1/10W 7.5K 5% 0805 2 R108, R208 RE-210007-GP 4720-103A-J 10K 1% 1/10W THK FLM 0805 8 R100, R101, R105, R106, R200, R201, R205, R206 RE-210006-GP 4720-103J-J RMG 1/10W 10K 5% 0805 3 R103, R128, R203 RE-212001-GP 4720-123J-J RMG 1/10W 12K 5% 0805 1 R176 RE-224001-GP 4720-243J-J 24.0K 1% 1/10W THK FLM 0805 4 R117, R121, R217, R221 RE-239001-GP 4720-393J-J RMG 1/10W 39K 5% 0805 2 R107, R207 RE-247004-GP 4721-473J-6 RMG 1/8W 47K 5% 1206 1 R125 RE-247005-GP 4720-473J-J RMG 1/10W 47K 5% 0805 1 R183 RE-268003-GP 4721-683A-6 RMG 1/8W 68K 1% 1206 4 R22A, R22B, R23A, R23B RE-315003-GP 4721-154J-6 RMG 1/8W 150K 5% 1206 6 R104, R173, R178, R186, R192, R204 RE-346401-GP 4721-4643-6 464K 1% 1/8W THK FLM 1206 3 R166, R167, R266 RE-347003-GP 4720-474J-J RMG 1/10W 470K 5% 0805 2 R172, R185

4721-101J-6 RMG 1/8W 100R 5% 1206 1 R197 4721-824J-6 RMG 1/8W 820K 5% 1206 2 R116, R216

WP-002453-00 Channel 2 Module Assembly (left)

CA-215004-GP 153R-152J-5-XQ CM 250V 0.0015UF 5% RL 1 C214 CA-233004-GP 153F-332J-5-KW CM 50V 3300pF 5% RL 6x12 2 C272, C279 CA-322006-GP 153F-223J-5-LQ CM 50V .022UF 5% RL 5% RL 2 C216, C219 CA-368004-GP 153R-683J-5-WWM 0.068UF 5% 250V FILM DIPPED 2 C224, C226 CA-410018-GP 153R-104J-5-YRM CM 250V 0.1u 5% RL 2 C274, C275 CA-547008-GP 157R-475M-5-OV 4.7UF 20% 250V ELECTRO RAD 1 C7 CA-610009-GP 157Q-106M-5-IU CE 35V 10UF 20% RL 5 X 11 1 C271 CA-622007-GP 157E-226M-5-IUN CE 25NP 22UF 20% RL 5X11 1 C229 CA-647005-GP 157F-476M-5-LU CE 50V 47UF 20% RL 1 C8 CA-710009-GP 157E-107M-5-KW CE 25V 100UF 20% RL 2 C273, C280 CA-912001-GP 8910-0494-0 12000UF,20 PCNT,63V,CE,RL,, 4 C220–C223 CO-000214-GP 2102-031S-004 CONN 3 PIN STRAIGHT WAFER 1 J257 CO-000217-GP 2102-130S-003 CONN 13 PIN STRAIGHT WAFER 1 J204 QD-000198-GP 3700-4531-G LED 4.7MM GRN W/STAND 1 LD1 HW-000020-GP 4134-8851-0 FUSE HOLDER 6.3MM 2 REF: F200 MS-000127-GP 5120-0501-0 FUSE T20A/125V 6.4X32MM 1 F200 PT-110002-GP 4756-1016-3-06 TRIM POT,100,20 PCNT,0.15W,, 1 R231 RE-.02201-GP 471A-022K-5-N 0.22 OHM 5% 3W THK FLM 8 R242, R243, R248, R249, R252, R253, R256, R259 RE-.15003-GP 4719-1R5J-1-X 1.5 OHM 5% 2W THK FLM 2 R281, R282 RE-.33001-GP 4718-3R3J-1-X RMF 1W 3.3 OHM 5% 2 R246, R247 RE-.56006-GP 4719-5R6J-1-X RMF 2W 5.6 OHM 5% 1 R260 RE-000250-GP 8910-0488-0 NTC RES 50 OHM 1 R234 RE-000260-GP 8910-0274-0 THERMAL PTC 60C 100 OHM 1 R 7 RE-001005-GP 4715-100J-2 RMF 1/4W 10 OHM 5% 1 R263 RE-001201-GP 471B-120J-1-X 12 5% 5W METAL OXIDE FILM 4 R254, R255, R261, R262 RE-002202-GP 4718-220J-2-P RMF 1W 22 5% AT FP 2 R236, R237 RE-010008-GP 4715-101J-2 RMF 1/4W 100 OHM 5% 1 R264 RE-122006-GP 4756-2226-3-06 SVR 2.2K H3 7X7 2 R239, R240 RE-122008-GP 471B-222J-1-X RMF 5W 2.2K 5% METAL 3 R257, R258, R298 RE-151003-GP 471B-512J-1-X RMF 5W 5.1K 5% AL METAL 2 R280, R288 RE-182002-GP 471B-822J-1-X RMF 5W 8.2K 5% AL METAL 4 R218, R219, R233, R235 RE-212002-GP 4718-123J-2-X RMF 1W 12K 5% AT METAL 2 R277, R294 RE-215007-GP 4718-153J-2-X RMF 1W 15K 5% METAL 1 R265 RE-233002-GP 4719-333J-2-X RMF 2W 33K 5% METAL 2 R2, R5 QD-000202-GP 4804-0040-1 DIODE IN4004 AL 5 D1, D11, D13, D217, D218 QD-000203-GP 4838-15V6-2 DIOD ZNR 15V 1W SILICON EPIT 2 D8, D15 QD-000206-GP 4804-9340-2 DIOD RECT FAST, IN4934 AT D208, D209 QD-000207-GP 4860-5020-5 XISTOR NPN 250V 0.5A MJE15032 1 Q205 QD-000208-GP 4860-5060-5 TR 2SA1943 T0-3P (L) 3 Q203, Q207, Q209, Q211 QD-000209-GP 4860-5050-5 TR 2SC5200 T0-3P (L) 3 Q204, Q208, Q210, Q212 QD-000210-GP 4860-5030-5 XISTOR PNP 250V MJE15033 1 Q206

(was PCB-QZ030C-PWR1)

RMX Series Technical Service Manual (2RU models) 31 TD-000098-00 rev. C

RMX2450 Channel 2 module (continued)

QSC part # Revised QSC # Description Qty. Notes or Component Reference

*QD-000211-GP *4860-8890-0 TR MPS A06VCE 80V NS 1 Q5 (December 2001 and earlier) *QD-000212-GP *4837-5B10-2 DIODE ZENER 1/2W 5.5-5.8V 2 D207, D210 (December 2003 and earlier) QD-000215-GP 4840-2190-0 DIODE MUR1520 15A 200V 2 D275, D276 QD-000218-GP 4837-3B20-2 DIOD ZNR 3.8-4.0V 1/2 HZ SER 1 D270 QD-000219-GP 4838-10V6-2 DIODE ZENER 1.3W 10V TEMIC 1 D274 QD-000220-GP 4838-12V6-2 DIODE ZENER 1W 12V AT TEMIC 1 D278 *QD-000221-GP 8910-0482-0 SRV-TRIAC 600V 40A MAC224 A8 1 Q213 (replaced by SG-000522-00 kit) *QD-000269-GP * DIODE ZENER 5.1V 5% .25W DO-35 2 D207, D210 (January 2004 and later) QD-000347-GP 490F-Z440-5 FETN,60V,50A,150W,,, 2 Q270, Q274 QD-000350-10 4860-5250-5 TR 2N5064 SCR 2 D219, D220 XF-000190-GP 1804-1040-0 SPRING COIL 2UH (14GA WIRE) 1 L200

Channel 2 SMT Parts

CA-047005-GP 150F-470J-J-BD CC 50V 47PF 5% 0805 3 C270, C276, C277 CA-110004-GP 150F-101K-J-BD CC 50V 100P 10% 0805 1 C 9 CA-222007-GP 150F-222K-6-CF CC 50V 2200pF 10% 1206 1 1 C215 CA-310009-GP 150F-103M-J-BD CC 50V 0.01uF 20% 0805 1 1 C281 CA-410014-GP 150F-104M-J-BD 0.1UF 10% 50V CER X7R 0805 1 C11 CA-410016-GP 150F-104M-6-CF CC 50V 0.1uF 20% 1206 1. 1 C278 IC-000214-GP 3130-9240-0 LM311M VOLTAGE 2 U270, U271 QD-000201-GP 4804-1480-3 DIODE LL4148 SM 1 D14 (December 2001 and earlier) QD-000201-GP 4804-1480-3 DIODE LL4148 SM 18 D2–D7, D9, D204, D211–D216, D271, D273, D277 QD-000201-GP 4804-1480-3 DIODE LL4148 SM 2 D16, D17 (January 2002 and later) QD-000204-GP 4860-0640-3 XISTOR NPN 60V 200MA 3904 SOT-23 6 Q8, Q9, Q201, Q202, Q271, Q273 QD-000205-GP 4853-9060-3 XISTOR PNP 40V 0.2A TR3906 SOT-23 1 Q4 (December 2001 and earlier) QD-000205-GP 4853-9060-3 XISTOR PNP 40V 0.2A TR3906 SOT-23 4 Q6, Q7, Q272, Q275 QD-000205-GP 4853-9060-3 XISTOR PNP 40V 0.2A TR3906 SOT-23 1 Q15 (January 2002 and later) QD-000213-GP 4860-5110-3 TR KST42 1 Q1 RE-004702-GP 4720-470J-J RMG 1/10W 47 OHM 5% 0805 3 R25, R270, R289 RE-007506-GP 4720-750J-J RMG 1/10W 75 OHM 5% 0805 1 R224 RE-082003-GP 4721-821J-6 RMG 1/8W 820 OHM 5% 1206 2 R230, R232 RE-115004-GP 4720-152J-J RMG 1/10W 1.5K 5% 0805 1 R229 RE-120004-GP 4720-202J-J RMG 1/10W 2K 1% 0805 3 R8, R290, R295 RE-122007-GP 4720-222J-J RMG 1/10W 2.2K 5% 0805 1 R291 RE-130103-GP 4720-3011-J RMG 1/10W 3.01K 1% 0805 1 R275 RE-147001-GP 4720-472J-J RMG 1/10W 4.7K 5% 0805 4 R274, R279, R287, R293 RE-159003-GP 4720-592A-J 5.9K 1% 1/10W THK FLM 0805 2 R271, R284 RE-168002-GP 4721-682J-6 RCF 1/8W 6.8K 5% ATS 1 R19 RE-210006-GP 4720-103J-J RMG 1/10W 10K 5% 0805 1 R228 RE-212001-GP 4720-123J-J RMG 1/10W 12K 5% 0805 1 R276 RE-247004-GP 4721-473J-6 RMG 1/8W 47K 5% 1206 1 R225 RE-247005-GP 4720-473J-J RMG 1/10W 47K 5% 0805 1 R283 RE-315003-GP 4721-154J-6 RMG 1/8W 150K 5% 1206 5 R10, R273, R278, R286, R292 RE-322001-GP 4721-224J-6 RMG 1/8W 220K 5% 1206 2 R18, R26 RE-330001-GP 4721-334J-6 RMG 1/8W 330K 5% 1206 1 R27 RE-346401-GP 4721-4643-6 464K 1% 1/8W THK FLM 1206 1 R15 RE-347003-GP 4720-474J-J RMG 1/10W 470K 5% 0805 2 R272, R285 RE-410002-GP 4721-105J-6 RMG 1/8W 1M 5% 1206 2 R3, R6

4721-101J-6 RMG 1/8W 100R 5% 1206 1 R30

WP-002455-00 Input Board Assembly

CA-147006-GP 150F-471J-5-OF 470PF 5% 50V CER NPO 4 C1, C2, C3, C4 CO-000204-GP 2113-1337-1 CONN XLR F VERT PLASTIC 2 J101, J201 CO-000235-GP 2113-1652-0 PHONE JACK 06.4 2 J102, J202 SW-000089-GP 5200-4713-0 10 POLE DIP SWITCH 1 SW1 WC-000194-GP 7010-9860-0 RIBBON CABLE 26 PIN IEC 1 J1

WP-002452-00 Output Board Assembly

CO-000236-GP 2113-1336-1 SPEAKON NEUTRIK 4 WIRE 2 J100, J200 PA-000043-00 2113-1338-0 PLATE ASSY,PLX/RMX,OUTPUT,, 1 J103 PL-000055-00 4154-2111-0 OUTPUT POST PLUG FOR CE (RED) 2 For European models only PL-000056-00 4154-2121-0 OUTPUT POST PLUG FOR CE (BLACK) 2 For European models only

(was PCB-QZ030C-INP)

(was PCB-QZ030C-OUT)

32 QSC Audio Products, LLC

THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION WHICH IS THE PROPERTY OF QSC AUDIO PRODUCTS, THAT MAY NOT BE DISCLOSED, REPRODUCED OR USED WITHOUT EXPRESS WRITTEN CONSENT FROM QSC AUDIO PRODUCTS.

D

87654321

REV

7. Schematics and diagrams

RMX 850: WP-008502-00; was PCB-QZ010C-PSU

00

SCREW 4 REQD

AXX

REVISIONS

EFF DATE CHK APPROVED DATEDESCRIPTION

RMX 1450: WP-008502-00; was PCB-QZ020C-PSU

PWR PCB

00

SCREW 8 REQD

D

RMX 850: PCB-QZ010C-INP

INPUT PCB

RMX 1850HD: PCB-QZ101C-PSU

RMX 2450: PCB-QZ030C-PSU

00

RMX 1450: PCB-QZ020C-INP

RMX 1850HD: PCB-QZ100C-INP

RMX 2450: PCB-QZ030C-INP

FAN

WASHER

00

HEX NUT

FLAT WASHER

C

TOROID

OUTPUT PCB

00

SWITCH

00

RACK EAR

2 REQD

00

CHASSIS

SCREW

00

2 REQD

SCREW 4 REQD

HEX NUT

2 REQD

B

00

RMX 850: PCB-QZ010C-OUT RMX 1450: PCB-QZ020C-OUT RMX 1850HD: PCB-QZ100C-OUT

C

B

DWG NO.

PA-002450-00

SH

1

REV

RMX 2450: PCB-QZ030C-OUT

SCREW

00

FAN GUARD

A

SCREW

00

4 REQD

THIS DRAWING USED IN CONJUNCTION WITH SCHEMATIC DWGs MAIN PCB SH-002451, INPUT PCB XO, WIRING DIAGRAM SH-002450-00 AND FINAL ASSY PF-002450-00.

NOTES: UNLESS OTHERWISE SPECIFIED

87654321

00

PWR CONNECTOR

00

SCREW 2 REQD

00

SCREW 2 REQD

00

7.1 RMX Assembly/Disassembly Diagram 1 of 2

(All models)

X RMX 2450

NEXT ASSY USED ON

APPLICATION

UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE IN INCHES.

TOLERANCES ARE: DECIMALS DECIMALS ANGLES .xx ± .02 .xxx ± .010 ±1/2 DEBURR EDGES .XXX R MAX

MATERIAL

SEE TABULATION BLOCK

FINISH

DO NOT SCALE DRAWING

DRAWN

MILA P. 12-07-2000

CHECKED

ISSUED

PARTS LIST

DATEAPPROVALS

D

SCALE

1/2

AUDIO PRODUCTS, INC.

COSTA MESA,CALIFORNIA

CHASSIS ASSY

RMX 2450

DWG NO.

PA-002450-00

SHEET

1 OF 2

A

REV

RMX Series Technical Service Manual (2RU models) 33 TD-000098-00 rev. C

THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION WHICH IS THE PROPERTY OF QSC AUDIO PRODUCTS, THAT MAY NOT BE DISCLOSED, REPRODUCED OR USED WITHOUT EXPRESS WRITTEN CONSENT FROM QSC AUDIO PRODUCTS.

D

87654321

CHANNEL MODULES

RMX 850: WP-008504-00; was PCB-QZ010C-PWR2 (right or Channel 2) RMX 1450: WP-014503-00; was PCB-QZ020C-PWR2 (right or Channel 2) RMX 1850HD: WP-018503-00; was PCB-QZ100C-PWR2 (right or Channel 1) RMX 2450: WP-002453-00; was PCB-QZ030C-PWR2 (right or Channel 1)

SCREW 5 REQD

CHANNEL MODULES

RMX 850: WP-008503-00; was PCB-QZ010C-PWR1 (left or Channel 1) RMX 1450: WP-014502-00; was PCB-QZ020C-PWR1 (left or Channel 1) RMX 1850HD: WP-018504-00; was PCB-QZ100C-PWR1 (left or Channel 2) RMX 2450: WP-002454-00; was PCB-QZ030C-PWR1 (left or Channel 2)

SCREW 6 REQD

D

C

B

C

B

DWG NO.

PA-002450-00

NUT

CHASSIS

KNOB

2 REQD

SH

2

REV

SCREW

A

4 REQD

WIRE ASSY

A

7.2 RMX Assembly/Disassembly Diagram 2 of 2

(All models)

87654321

D

SCALE

1/2

DWG NO.

PA-002450-00

SHEET

34 QSC Audio Products, LLC

REV

2 OF 2

8

7

THIS DOCUMENT CONTAINSPROPRIETARY INFORMATION WHICH ISTHE PROPERTY OF QSC AUDIO PRODUCTS, THATMAY NOT BE DISCLOSED, REPRODUCED OR USED WITHOUT EXPRESS WRITTEN CONSENT FROM QSC AUDIO PRODUCTS.

7

6

5

4

3

2

1

REVISION

REV

1

PROTOTYPE RELEASE

2

CLEAN UP BY AA3

DESCRIPTION

3-01-00

3-10-00

APPROVED / DATEEFF.DATE CHK

D

C

CLIP LIM A(1)

FILTER 30 HZ (2)

FILTER BYPASSA (3)

B

FILTER BYPASSB (8)

FILTER 30 HZ (9)

CLIP LIM B (10)

J101

J102

J202

J201

PARALLEL

INPUTS

(4, 5)

BRIDGE MONO (6, 7)

CH1_+IN

CH1_-IN

CHASSIS_GND

CH2_-IN

FIVE POSITION BARRIER STRIP

CH2_+IN

BR-POS

BR-NEG

D

C

B

DWGNO.

SH-000850-00

SH

1

REV

4

+15V_A

15V-1W

8

U101:2

4

NE5532

15V-1W

CHANNEL-1

C112

220-25V

D101

P1

7

D100

P1

C113

220-25V

4

J204:4

C114

R124

CLIP CH 1

J104:4

R125

^R_1206

0.001u, 100V 5%

47

LD100

RED

47K

^C_1206

^R_0805

D102

1N4148

D103

1N4148

R128

Q101

3904

10K

^R_0805

D104

1N4148

R130

820

^R_1206

5.6V 0.25W (up to Feb 2002)

4.7V 0.25W (Mar 2002–May 2003)

5.1V 0.25W (effective June 2003)

J104:7

J204:7

D105

1N4148

D106

1N4148

5.6V 0.25W (up to Feb 2002)

4.7V 0.25W (Mar 2002–May 2003)

5.1V 0.25W (effective June 2003)

R127: 100 (up to Feb 2002)

Ω

R127

75 (effective Mar 2002)

Ω

^R_0805

P1

4

D107:

+VCC_A

D117

1N4004

C120

SPEAKER CONNECTORS ON BREAK-AWAYPCB.

JP14

5-WAY BINDING POST CH A

JP13

J104:11

J204:11

CONTINUED, SHEET 2

CHANNEL 1

SPEAKER OUTPUT PCB

J103 +

1+

J100

1-

J103 -

2+

2-

SPEAKON

R160

5.6-2W

C124 .068-5%

250V

R161

BR_BAL

12-5W

33K

R22

33K

R23

^R_1206

SP_B

C121

P1

D118

1N4004

-VCC_A

-67V

L100

2uH

^R_1206

R24

3.3K

^R_0805

P1

R162

12-5W

WIRES TO BREAK-AWAY SPEAKER OUTPUT PCB

11

P1

E100

E101

SP_A

D112

1N4148

5

LD101

YELLOW

SIG CH 1

6

D108: 1N4934 (up to Feb 2002) 1N4004 (effective Mar 2002)

C115

^C_1206

0.0022u, 10%

R134

50

NTC

R135

2.0K-5W

J104:5

J204:5

J204:6

J104:6

R136

22-1W

FP

R139

R140

Q103 2SA1943

R142

0.22-3W

Q107 2SA1943

R148

0.22-3W

Q109 2SA1943

R152

D116

Q105

MJE15032

D113

1N4148

C117

CW

.0033

W

NEG

2.2K

CURRENT LIMIT

CCW

POS CURRENT

2.2K

W

LIMIT

C118

.0033

CW

D114

1N4148

R146

6.8-1W

R147

6.8-1W

Q106 MJE15033

1N4148

C119

P1

.022

D115

R129

1.5K

^R_0805

Q102

P1

3904

D107

D108

D109

1N4934

CW

R131

W

100

C116

BIAS

.022

CCW

D110

D110:

+67V

0.22-3W

P1

4700-80V

R157

820-5W

R158

820-5W

4700-80V

1N4148

820

R132

^R_1206

D111

1N4148

R133

2.0K-5W

R137

22-1W

Q104

2SC5200

FP

R143

0.22-3W

Q108

2SC5200

R149

0.22-3W

Q110

2SC5200

R153

0.22-3W

26-LINE RIBBON CABLE CONNECTS BREAKAWAY INPUT PCB TO MAIN PCB

^R_0805

C102

0.1-50V

10%

^C_1206

U10:1

LM13600M

5

1

R103

R102

C101

180p-5%

^C_0805

R105

10.0K

^R_0805

NE5532

U101:1

+

3

1K

-

2

R106

10.0K

^R_0805

C103

180p-5%

^C_0805

SEE SH 3

+14V

11

3

+

2

4

-

6

C104

.1-50V-10%

^C_1206

10.0K ^R_0805

150K

R104

^R_1206

-14V

SEE SH 3

2

3

1

RING

R

TIP

T

S

J5:5

5

J5:4

4

J5:3

J5:2

J5:1

RING

TIP

C1

470p 5%

1

2

3

4

5

6

7

8

9

SW1:10

GND

SW1:1

SW1:2

SW1:3

SW1:4

SW1:5

SW1:6

SW1:7

SW1:8

SW1:9

^C_1206

C2

470p 5%

^C_1206

11

12

13

14

15

BR M SEND (HI-SIGA)

BR MONO FEED

16

17

18

19

20

FILTSEND B (POT)

3

2

1

R

T

S

2

3

1

10

C3

C4

CLIP-LIMA

FILT-CAPA

FILT-SENDA

FILT-BYPA

FILTBYP B

FILTCAP B

CLIP LIM B

-IN B

+IN B

J1:1

J203:1

1

GND

J1:2

2

+INA

J1:3

3

-INA

470p 5%

^C_1206

J1:4

4

470p 5%

^C_1206

J1:5

5

J1:6

6

GND

J1:7

7

J1:8

8

J1:9

9

J1:10

10

GND

J1:11

11

J1:12

12

GND

J1:13

13

J1:14

14

GND

J1:15

15

J1:16

16

J1:17

17

J1:18

18

J1:19

19

J1:20

20

J1:21

21

GND

J1:22

22

J1:23

23

GND

J1:24

24

J1:25

25

J1:26

26

GND

J203:2

J203:3

J203:4

J203:5

J203:6

J203:7

J203:8

J203:9

J203:10

J203:11

J203:12

J203:13

J203:14

J203:15

J203:16

J203:17

J203:18

J203:19

J203:20

J203:21

J203:22

J203:23

J203:24

J203:25

J203:26

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

A1

FILT-CAPA

FILT-SENDA

SW TOGND FOR CLIP LIM

BR MONO FEED

BR_RET

BR_BAL

BR_CUT

F_BYP_B

F_SND_B

F_30_B

CLIP_B

-IN_B

+IN_B

FILT-BYPA

R100

10.0K

^R_0805

R101

10.0K

^R_0805

8

^U_LM13600

P1

7

R107

1

39K

C105

0.1-50V 10%

ROUTE THIS GROUND TO "A" GNDAT JI-2 INPUT CABLE

A1

C106

R112

R112: 10K LINEAR (up to Apr 2002)

2.5K LINEAR (effective May 2002) RIGHTANGLE POT

R108

7.50K ^R_0805

^R_0805

100

R110

R109

100-25V

C100

^C_1206

A1 P1

C106: 10 µF 50V NP (up toApril 2002) 47 µF 16V NP (effective May 2002)

CW

CCW

A1

100

A1

R111

^R_0805

P1

R20

6.8-1W

CHANNEL 1 GAIN

R113

W

270

^R_0805

R114

^R_0805

270

A1

ROUTE THIS GROUND TO "P" GNDAT HEATSINK COMMON BETWEEN CHA AND CH B

12

NC

12

NC

13

NC

13

C107

.22-5%

C108

.15-5%

^R_0805

A1

R114:

4.7K (up to Apr 2002)

1.2K (effective May 2002)

Q100

3906

J104:10

J204:10

270 (up to Apr 2002) 230 (May–July 2002)

232 (effective August 2002)Ω

R126

1K

^R_0805

J204:12

J104:12

J104:13

J204:13

R116

R117

Ω Ω

+VCC_A

SEESH3

SP_A

R116: 390K (up to Apr 2002) 464K (effective May 2002)

^R_1206

C109

.15-5%

R121

20.0K ^R_0805

R115

820

^R_1206

10

R118

10

R119

TH_A

R120:

R120

^R_0805

A1

150K

C110

56p

^C_0805

20.0K ^R_0805

^R_1206

9.09K-1%-1/2W

6

-

5

+

-15V_A

C111

56p-200V-COG

^C_1206

R122

10.0K-1%-1/2W

R123

Gray shading indicates

A

5. J104, J204 ARE CONNECTED PIN TO PIN BY 13-LINE RIBBON CABLE.

4. PART NUMBERING SCHEME PARTS IN COMMON TO BOTH CH: 1-99. CH 1 PARTS 101-199, CH 2 PARTS 201-299.

3. COMPONENTS MARKED WITH ARE SAFETY CRITICAL PARTS.

2. COMPONENTS WITH VALUE PREFIXED WITH A "^" REPRESENT SMT COMPONENTS.

1. THIS DRAWING USED IN CONJUNCTION WITH ASSEMBLY WP-000851-00

NOTES: UNLESS OTHERWISE SPECIFIED

signal path

!

8

7.3 RMX850 Schematic Diagram 1 of 3

Channel 1

7

6

5

4

WP-000850-00 RMX 850

NEXTASSY USED ON

APPLICATION

3

ITEM NO.QTY PART NO.

UNLESS OTHERWISE SPECIFIED

DIMENSIONS ARE IN INCHES.

DIMENSIONS PER ANSIY14.5-1982

TOLERANCESARE:

DECIMALS

+

.XX

DEBURR EDGES .XXX R MAX

MATERIAL

FINISH

+

.XXX

-

DO NOT SCALE DRAWING

ANGLES

CONTRACT NO.

O

DRAWN

CHECKED

ISSUED

CAD SEED FILE NO.

APPROVALS

PATQUILTER

DATE

2-25-00

DESCRIPTION

PARTS LIST

AUDIO PRODUCTS, INC.

COSTAMESA, CALIFORNIA

SCHEMATIC DIAGRAM

VENDOR

A

RMX 850

SIZE FSCM NO. DWG NO.

D

PLOT DATE:

SCALE CADFILE NO. SHEET

Thu Sep 07, 2000

2

NONE

P:RMXQSCRMX850

SH-000850-00

RMX850-3.sch

1

PLOT DATE: Thu Sep 07, 2000

REV

3

3OF1

RMX Series Technical Service Manual (2RU models) 35 TD-000098-00 rev. C

THIS DOCUMENT CONTAINSPROPRIETARY INFORMATION WHICH ISTHE PROPERTY OF QSC AUDIO PRODUCTS, THATMAY NOT BE DISCLOSED, REPRODUCED OR USED WITHOUT EXPRESS WRITTEN CONSENT FROM QSC AUDIO PRODUCTS.

8

67 5

1432

D

CHANNEL-2

C201

180p-5%

^C_0805

R205

^R_1206

C214

0.001u, 100V 5%

P1

47

R224

P1

LD200

RED

CLIP CH 2

100 (up to Feb 2002)

Ω

75 (effective Mar 2002)

Ω

R226

47K

^R_0805

D202

1N4148

D203

1N4148

R127:

^C_1206

A1

10.0K

^R_0805

NE5532

+IN_B

SEE SH 1

-IN_B

R200

10.0K

^R_0805

R201

10.0K

^R_0805

R202

^R_0805

U201:1

+

3

1K

1

-

2

R206

10.0K

^R_0805

C203

C

SEE SH 1

F_30_B

F_SND_B

F_BYP_B

180p-5%

^C_0805

SEE SH 3

+14V

R208

R207

U10:2

LM13600M

12

10

9

16

39K

^R_0805

14

+

15

13

-

R209

R203

10.0K ^R_0805

B

SEE SH 1

CLIP_B

SW-GND FOR CLIP LIM

SEE SH 1

BR MONO RETURN -- CAUTION, SENSITIVE NODE

BR_RET

R204

150K

-14V

SEE SH 3

^R_1206

C205

100-25V

R210

270

^R_0805

C206

R212

R212: 10K LINEAR (up toApr 2002)

2.5K LINEAR (effective May 2002) RIGHTANGLE POT

7.50K ^R_0805

1.2K (effective May 2002)

^R_0805

100

R211

C206: 10 µF 50V NP (up toApril 2002) 47 µF 16V NP (effective May 2002)

CW

R213

W

270

^R_0805

CCW

A1

R214:

4.7K (up to Apr 2002)

100

A1

^R_0805

3906

R214

Q200

A1

C207

.22-5%

C208

.15-5%

^R_0805

R215

R216

R217

820

^R_1206

270 (up to Apr 2002)

230 (May–July 2002)

Ω

232 (effective August 2002)Ω

^R_1206

.15-5%

20.0K

Ω

A1

R216: 390K (up to Apr 2002) 464K (effective May 2002)

C209

R221

^R_0805

+VCC_B

150K

R218

^R_1206

150K

R219

^R_1206

-VCC_B

R220:

R220

270

^R_0805

20.0K

C210

56p

^C_0805

^R_0805

+15V_B

8

6

-

5

+

4

-15V_B

C211

56p-200V-COG

^C_1206

R222

10.0K-1%-1/2W

220-25V

15V-1W

U201:2

NE5532

D200

15V-1W

220-25V

C212

D201

7

C213

R228

Q201

3904

10K

^R_0805

D204

P1

1N4148

5.6V 0.25W (up to Feb 2002)

4.7V 0.25W (Mar 2002–May 2003)

5.1V 0.25W (effective June 2003)

1N4934 (up to Feb 2002)

1N4004 (effective Mar 2002)

D205

1N4148

D206

1N4148

5.6V 0.25W (up to Feb 2002)

4.7V 0.25W (Mar 2002–May 2003)

5.1V 0.25W (effective June 2003)

R227

^R_0805

P1

R229

1.5K

^R_0805

Q202

3904

D207:

D208:

R233

2.0K-5W

R231

100

BIAS

D210:

R230

D208

D209

R232

D211

C220

C221

+VCC_B

D217

1N4004

C

R260

5.6-2W

WIRES TO SPEAKER OUTPUT PCB

R261

12-5W

L200

2uH

C224

.068-5%

250V

R262 12-5W

E200

E201

P1

D218

1N4004

-VCC_B

-67V

SP_B

JP15

5-WAY BINDING POST CH B

JP16

CHANNEL B

SPEAKER OUTPUT

J203 +

J200

J203 -

SPEAKER CONNECTORS ON BREAKAWAYPCB FROM SHEET ONE

BR-POS

TO CH A SHEET 1

2+

1+

2-

1-

SPEAKON

BR-NEG

B

DWGNO.

R235

2.0K-5W

D212

1N4148

LD201

YELLOW

SIGCH2

820

^R_1206

D207

C215

^C_1206

0.0022u, 10%

1N4934

CW

W

C216 .022

CCW

NTC

R234

R236

22-1W

FP

1N4148

CW

R239

2.2K

CCW

R240

2.2K

50

CW

1N4148

D210

Q203

2SA1943

D213

W

NEG CURRENT LIMIT

POS CURRENT LIMIT

W

D214

C217

.0033

C218

.0033

R242

0.22-3W

Q207 2SA1943

Q205

MJE15032

R246

6.8-1W

R247

6.8-1W

Q206 MJE15033

R248

P1

0.22-3W

Q209 2SA1943

D216

1N4148

C219

.022

D215

R252

+67V

0.22-3W

P1

4700-80V

R257

820-5W

R258

820-5W

4700-80V

1N4148

820

1N4148

^R_1206

R237

22-1W

FP

Q204

2SC5200

R243

0.22-3W

Q208

2SC5200

R249

0.22-3W

Q210

2SC5200

R253

0.22-3W

SH-000850-00

SH

2

REV

3

A

Gray shading indicates signal path

7.4 RMX850 Schematic Diagram 2 of 3

Channel 2

NOTES: UNLESS OTHERWISE SPECIFIED

8

7

6

5

4

3

2

SIZE FSCM NO. DWG NO.

D

SCALE CADFILE NO. SHEET

NONE

PLOT DATE: Thu Sep 07, 2000

SH-000850-00

RMX850-3.sch

1

36 QSC Audio Products, LLC

REV

3

OF

32

7.5 RMX850 Schematic Diagram 3 of 3

Power Supply

RMX Series Technical Service Manual (2RU models) 37 TD-000098-00 rev. C

THIS DOCUMENT CONTAINSPROPRIETARY INFORMATION WHICH ISTHE PROPERTY OF QSC AUDIO PRODUCTS, THATMAY NOT BE DISCLOSED, REPRODUCED OR USED WITHOUT EXPRESS WRITTEN CONSENT FROM QSC AUDIO PRODUCTS.

8

3-01-00

3-02-00

3-10-00

1

APPROVED / DATEEFF.DATE CHK

7

6

5

4

3

2

REV

1

PROTOTYPE RELEASE

2 CLEAN UP BY PHQ

3

4 CLEAN UP BY AA

DESCRIPTION

REVISION

D

C

CLIP LIM A(1)

FILTER 30 HZ (2)

FILTER BYPASSA (3)

B

FILTER BYPASSB (8)

FILTER 30 HZ (9)

CLIP LIM B (10)

J101

J102

J202

J201

PARALLEL

INPUTS

(4, 5)

BRIDGE MONO (6, 7)

CH1_+IN

CH1_-IN

CHASSIS_GND

CH2_-IN

FIVE POSITION BARRIER STRIP

CH2_+IN

BR-POS

BR-NEG

D

C

B

DWGNO.

SH-001451-00

SH

1

REV

4

+15V_A

220-25V

15V-1W

8

U101:2

4

NE5532

15V-1W

220-25V

CHANNEL-1

C112

D101

P1

7

D100

P1

C113

4

J204:4

R125

47K

^R_1206

C114

^C_1206

0.001u, 100V 5%

5.6V 0.25W (up to Feb 2002)

4.7V 0.25W (Mar 2002–May 2003)

5.1V 0.25W (effective June 2003)

47

R124

^R_0805

D102

1N4148

D103

1N4148

LD100

RED

CLIP CH 1

R127

4

J104:4

R128

Q101 3904

10K

^R_0805

D104

P1

1N4148

R130

820

^R_1206

D107:

1N4934 (up to Feb 2002)

1N4004 (effective Mar 2002)

J104:7

7

J204:7

7

D105

1N4148

D106

1N4148

5.6V 0.25W (up to Feb 2002)

4.7V 0.25W (Mar 2002–May 2003)

5.1V 0.25W (effective June 2003)

R127: 100 (up to Feb 2002)

Ω

^R_0805

75 (effective Mar 2002)

Ω

P1

D107

R129

1.5K

^R_0805

Q102

3904

D108:

R131

100

BIAS

D110:

R135

3.0K-5W

^C_1206

R134

50

NTC

J104:5

J204:5

J204:6

J104:6

R137 22-1W

FP

R136

22-1W

FP

R139

R140

Q103 2SA1943

R142

0.22-3W

Q107

2SA1943

R148

0.22-3W

Q109

2SA1943

R152

D116

Q105

MJE15032

D113

1N4148

C117

CW

.0033

W

NEG

2.2K

CURRENT LIMIT

CCW

POS CURRENT

2.2K

LIMIT

W

C118

.0033

CW

D114

1N4148

R146

6.8-1W

R147

6.8-1W

Q106 MJE15033

1N4148

C119

P1

.022

D115

1N4148

Q104

2SC5200

R143

0.22-3W

Q108

2SC5200

R149

0.22-3W

Q110

2SC5200

R153

D112

1N4148

5

LD101

YELLOW

SIG CH 1

6

D108

C115

0.0022u, 10%

D109

1N4934

CW

W

C116 .022

CCW

D110

5.6V-.25W

820

R132

^R_1206

D111

1N4148

R133

3.0K-5W

0.22-3W

Q111

2SA1943

2SC5200

+78V

3300-100V

R157

1K-5W

R158

1K-5W

3300-100V

Q112

+VCC_A

D117

R156

0.22-3W 1N4004

P1

C120

C121

R159

-78V

0.22-3W

D118

1N4004

3300-100V

P1

-VCC_A

C122

C123

BR_BAL

SPEAKER CONNECTORS ON BREAK-AWAYPCB.

JP14

5-WAY BINDING POST CH 1

JP13

J104:11

J204:11

CONTINUED, SHEET 2

CHANNEL 1

SPEAKER OUTPUT PCB

J103 +

1+

J100

1-

J103 -

2+

2-

SPEAKON

R160

5.6-2W

250V

R161

12-5W

C124 .068-5%

L100

WIRES TO BREAK-AWAY SPEAKER OUTPUT PCB

R162

12-5W

E100

2uH

E101

P1

11

33K

R22

^R_1206

^R_0805

33K

R23

^R_1206

SP_B

SP_A

R24

3.3K

P1

26-LINE RIBBON CABLE CONNECTS BREAKAWAY INPUT PCB TO MAIN PCB

^R_0805

C102

0.1-50V

10%

^C_1206

U10:1

LM13600M

5

1

R103

R102

C101

180p-5%

^C_0805

R105

10.0K

^R_0805

NE5532

U101:1

+

3

1K

-

2

10.0K

^R_0805

C103

180p-5%

^C_0805

SEE SH 3

+14V

11

3

+

2

4

-

6

C104

.1-50V-10%

^C_1206

10.0K ^R_0805

150K

R104

^R_1206

-14V

SEE SH 3

2

3

1

RING

R

TIP

T

S

J5:5

5

J5:4

4

J5:3

J5:2

J5:1

RING

TIP

C1

470p 5%

GND

SW1:1

SW1:2

SW1:3

SW1:4

SW1:5

SW1:6

SW1:7

SW1:8

SW1:9

SW1:10

^C_1206

C2

470p 5%

^C_1206

11

12

13

14

15

BR M SEND (HI-SIGA)

BR MONO FEED

16

17

18

19

20

FILTSEND B (POT)

3

2

1

R

T

S

2

3

1

2

3

4

5

6

7

8

9

10

C3

C4

CLIP-LIMA

FILT-CAPA

FILT-SENDA

FILT-BYPA

FILTBYP B

FILTCAP B

CLIP LIM B

-IN B

+IN B

J1:1

J203:1

1

GND

J1:2

2

+INA

J1:3

3

-INA

470p 5%

^C_1206

J1:4

4

470p 5%

^C_1206

J1:5

5

J1:6

6

GND

J1:7

7

J1:8

8

J1:9

9

J1:10

10

GND

J1:11

11

J1:12

12

GND

J1:13

13

J1:14

14

GND

J1:15

15

J1:16

16

J1:17

17

J1:18

18

J1:19

19

J1:20

20

J1:21

21

GND

J1:22

22

J1:23

23

GND

J1:24

24

J1:25

25

J1:26

26

GND

J203:2

J203:3

J203:4

J203:5

J203:6

J203:7

J203:8

J203:9

J203:10

J203:11

J203:12

J203:13

J203:14

J203:15

J203:16

J203:17

J203:18

J203:19

J203:20

J203:21

J203:22

J203:23

J203:24

J203:25

J203:26

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

A1

BR MONO FEED

BR_RET

BR_BAL

BR_CUT

F_BYP_B

F_SND_B

F_30_B

CLIP_B

-IN_B

+IN_B

R100

10.0K

^R_0805

R101

10.0K

^R_0805

FILT-CAPA

FILT-SENDA

FILT-BYPA

SW TOGND FOR CLIP LIM

8

^U_LM13600

P1

7

R106

R107

1

39K

C105

0.1-50V 10%

ROUTE THIS GROUND TO "A" GNDAT JI-2 INPUT CABLE

A1

C106

R112

R112: 10K LINEAR (up toApr 2002)

2.5K LINEAR (effective May 2002) RIGHTANGLE POT

R108

7.50K ^R_0805

^R_0805

100

R109

R110

100-25V

C100

^C_1206

C106: 10 µF 50V NP (up toApril 2002) 47 µF 16V NP (effective May 2002)

CW

CCW

A1

100

A1

R111

270

^R_0805

P1

R20

6.8-1W

CHANNEL 1 GAIN

R113

W

270

^R_0805

R114

^R_0805

A1

ROUTE THIS GROUND TO "P" GNDAT HEATSINK COMMON BETWEEN CHA AND CH B

12

P1A1

NC

12

NC

13

NC

13

C107

.22-5%

C108

.15-5%

^R_0805

A1

R114:

4.7K (up to Apr 2002)

1.2K (effective May 2002)

Q100

3906

J104:10

J204:10

232 (effective August 2002)Ω

R126

1K

^R_0805

J204:12

J104:12

J104:13

J204:13

R116

^R_1206

R116: 499K (up to Apr 2002) 560K (effective May 2002)

C109

.15-5%

R117

20.0K ^R_0805

+VCC_A

10

TH_A

SEESH3

270 (up to Apr 2002)

Ω

230 (May–July 2002)

Ω

R120:

A1

SP_A

R121

R115

820

^R_1206

R118

R119

R120

270

^R_0805

150K

^C_0805

20.0K

^R_1206

C110

56p

^R_0805

56p-200V-COG

R123

11.3K-1%-1/2W

6

-

5

+

-15V_A

C111

^C_1206

R122

13.3K-1%-1/2W

A

5. J104, J204 ARE CONNECTED PIN TO PIN BY 13-LINE RIBBON CABLE.

4. PART NUMBERING SCHEME PARTS IN COMMON TO BOTH CH: 1-99. CH 1 PARTS 101-199, CH 2 PARTS 201-299.

3. COMPONENTS MARKED WITH ARE SAFETY CRITICAL PARTS.

2. COMPONENTS WITH VALUE PREFIXED WITH A"^" REPRESENT SMT COMPONENTS.

1. THIS DRAWING USED IN CONJUNCTION WITH ASSEMBLY WP-001451-00

NOTES: UNLESS OTHERWISE SPECIFIED

signal path

!

8

Gray shading indicates

7.6 RMX1450 Schematic Diagram 1 of 3

Channel 1

7

6

5

4

NEXTASSY USED ON

RMX 1450WP-001451-00

APPLICATION

3

ITEM NO.QTY PART NO.

UNLESS OTHERWISE SPECIFIED

DIMENSIONS ARE IN INCHES.

DIMENSIONS PER ANSIY14.5-1982

TOLERANCESARE:

DECIMALS

+

.XXX

.XX

-

DEBURR EDGES .XXX R MAX

MATERIAL

FINISH

-

DO NOT SCALE DRAWING

ANGLES

CONTRACT NO.

O

DRAWN

CHECKED

ISSUED

CAD SEED FILE NO.

APPROVALS

PATQUILTER

DATE

2-25-00

DESCRIPTION

PARTS LIST

AUDIO PRODUCTS, INC.

COSTAMESA, CALIFORNIA

SCHEMATIC DIAGRAM

VENDOR

A

RMX 1450

SIZE FSCM NO. DWG NO.

PLOT DATE:

2

D

SCALE CADFILE NO. SHEET

Thu Sep 07, 2000

NONE

P:GPE PRODUCTS\PRMX-SERIESQSC145 0

SH-001451-00

RMX1450-4.sch

1

PLOT DATE: Thu Sep 07, 2000

REV

4

3OF1

38 QSC Audio Products, LLC

THIS DOCUMENT CONTAINSPROPRIETARY INFORMATION WHICH ISTHE PROPERTY OF QSC AUDIO PRODUCTS, THATMAY NOT BE DISCLOSED, REPRODUCED OR USED WITHOUT EXPRESS WRITTEN CONSENT FROM QSC AUDIO PRODUCTS.

8 67 5

1432

D

CHANNEL-2

C201

180p-5%

^C_0805

R205

A1

10.0K

^R_0805

+IN_B

SEE SH 1

-IN_B

R200

10.0K

^R_0805

R201

10.0K

^R_0805

R202

1K

^R_0805

+

3

1

-

2

R206

10.0K

^R_0805

NE5532

U201:1

C203

C

SEE SH 1

F_30_B

F_SND_B

F_BYP_B

180p-5%

^C_0805

SEE SH 3

+14V

R208

R207

U10:2

LM13600M

12

10

9

16

39K

^R_0805

14

+

15

13

-

R209

R203

10.0K ^R_0805

B

SEE SH 1

CLIP_B

SW-GND FOR CLIP LIM

SEE SH 1

BR MONO RETURN -- CAUTION, SENSITIVE NODE

BR_RET

R204

150K

SEE SH 3

^R_1206

-14V

C205

100-25V

R210

270

^R_0805

C206

R212

R212: 10K LINEAR (up toApr 2002)

2.5K LINEAR (effective May 2002) RIGHTANGLE POT

7.50K ^R_0805

1.2K (effective May 2002)

^R_0805

100

R211

C206: 10 µF 50V NP (up toApril 2002) 47 µF 16V NP (effective May 2002)

CW

R213

W

270

^R_0805

CCW

A1

R214:

4.7K (up to Apr 2002)

100

A1

^R_0805

3906

R214

Q200

A1

C207

.22-5%

C208

.15-5%

^R_0805

R215

R216

R217

820

^R_1206

270 (up to Apr 2002)

Ω

230 (May–July 2002)

Ω

232 (effective August 2002)Ω

R216: 499K (up to Apr 2002) 560K (effective May 2002)

^R_1206

C209

.15-5%

R221

20.0K ^R_0805

+VCC_B

150K

R218

^R_1206

150K

R219

^R_1206

-VCC_B

R220:

R220

A1

^R_0805

20.0K

C210

56p

^C_0805

^R_0805

+15V_B

8

6

-

5

+

4

-15V_B

C211

56p-200V-COG

^C_1206

R222

13.3K-1%-1/2W

220-25V

15V-1W

U201:2

NE5532

D200

15V-1W

220-25V

C212

D201

7

C213

P1

CLIP CH 2

100 (up to Feb 2002)

Ω

75 (effective Mar 2002)

Ω

C214

R224

^R_1206

0.001u, 100V 5%

47

LD200

RED

R226

47K

^R_0805

D202

1N4148

D203

1N4148

R127:

^C_1206

Q201

3904

D204

1N4148

4.7V 0.25W (Mar 2002–May 2003)

5.1V 0.25W (effective June 2003)

1N4004 (effective Mar 2002)

4.7V 0.25W (Mar 2002–May 2003)

5.1V 0.25W (effective June 2003)

R227

^R_0805

P1

R229

R228

1.5K

10K

^R_0805

Q202

P1

3904

D208:

1N4934 (up to Feb 2002)

D207:

5.6V 0.25W (up to Feb 2002)

D205

1N4148

D206

1N4148

5.6V 0.25W (up to Feb 2002)

R233

3.0K-5W

R231

100

BIAS

D210:

R230

D208

D209

R232

D211

R256

C220

C221

R259

0.22-3W

-78V

D217

1N4004

D218

1N4004

+VCC_B

3300-100V

P1

-VCC_B

C222

C223

R260

5.6-2W

C224

250V

R261

12-5W

L200

2uH

.068-5%

C

JP15

5-WAY BINDING POST CH 2

JP16

CHANNEL 2

SPEAKER OUTPUT

J203 +

J200

J203 -

SPEAKER CONNECTORS ON BREAKAWAYPCB FROM SHEET ONE

BR-POS

TO CH 1 SHEET 1

2+

1+

2-

1-

SPEAKON

BR-NEG

WIRES TO SPEAKER OUTPUT PCB

R262

12-5W

P1

E200

E201

B

DWGNO.

SP_B

R235

3.0K-5W

D212

1N4148

LD201

YELLOW

SIGCH2

820

^R_1206

D207

C215

0.0022u, 10%

1N4934

CW

W

C216 .022

CCW

^C_1206

R234

50

NTC

R236

22-1W

R239

2.2K

R240

2.2K

FP

1N4148

CW

CCW

CW

1N4148

D210

Q203

2SA1943

D213

W

NEG CURRENT LIMIT

POS CURRENT LIMIT

W

D214

C217

.0033

C218

.0033

R242

0.22-3W

Q207 2SA1943

Q205

MJE15032

R246

6.8-1W

R247

6.8-1W

Q206 MJE15033

R248

P1

0.22-3W

Q209 2SA1943

D216

1N4148

C219

.022

D215

R252

0.22-3W

Q211 2SA1943

1.0K-5W

+78V

P1

3300-100V

R257

R258

3300-100V

1N4148

820

1N4148

^R_1206

R237 22-1W

FP

Q204

2SC5200

R243

0.22-3W

Q208

2SC5200

R249

0.22-3W

Q210

2SC5200

R253

0.22-3W

Q212

2SC5200

SH-001451-00

SH

2

REV

4

Gray shading indicates

A

signal path

A

7.7 RMX1450 Schematic Diagram 2 of 3

Channel 2

NOTES: UNLESS OTHERWISE SPECIFIED

8

7

6

5

4

3

2

SIZE FSCM NO. DWG NO.

D

SCALE CADFILE NO. SHEET

NONE

PLOT DATE: Thu Sep 07, 2000

SH-001451-00

RMX1450-4.sch

1

RMX Series Technical Service Manual (2RU models) 39 TD-000098-00 rev. C

OF

23

REV

4

7.8 RMX1450 Schematic Diagram 3 of 3

Power Supply

40 QSC Audio Products, LLC

Gray shading indicates signal path

7.9 RMX1850HD Schematic Diagram 1 of 3

Channel 1

RMX Series Technical Service Manual (2RU models) 41 TD-000098-00 rev. C

Gray shading indicates signal path

7.10 RMX1850HD Schematic Diagram 2 of 3

Channel 2

42 QSC Audio Products, LLC

7.11 RMX1850HD Schematic Diagram 3 of 3

Power Supply

RMX Series Technical Service Manual (2RU models) 43 TD-000098-00 rev. C

THIS DOCUMENT CONTAINSPROPRIETARY INFORMATION WHICH ISTHE PROPERTY OF QSC AUDIO PRODUCTS, THATMAY NOT BE DISCLOSED, REPRODUCED OR USED WITHOUT EXPRESS WRITTEN CONSENT FROM QSC AUDIO PRODUCTS.

D

2

3

1

RING

R

TIP

T

S

J5:5

CH1_+IN

J5:4

CH1_-IN

J5:3

CHASSIS_GND

J5:2

CH2_-IN

FIVE POSITION BARRIER STRIP

J5:1

CH2_+IN

RING

R

TIP

T

S

2

3

1

Gray shading indicates signal path

C

CLIP LIM A(1)

FILTER 30 HZ (2)

FILTER BYPASSA (3)

B

FILTER BYPASSB (8)

FILTER 30 HZ (9)

CLIP LIM B (10)

A

J101

J102

J202

J201

PARALLEL

INPUTS

(4, 5)

BRIDGE MONO (6, 7)

R162

12-5W

R155

12-5W

E100

E101

R22B

R23B

2N5064

68K

D120

5-WAY BINDING POST CH 1

1

R163

10-1/4W

R164

100-1/4W

SPEAKER CONNECTORS ON BREAK-AWAYPCB. CONTINUED, SHEET 2

CHANNEL 1

SPEAKER OUTPUT PCB

JP14

J103 +

J100

J103 -

JP13

WIRES TO BREAK-AWAY SPEAKER OUTPUT PCB

68K

R22A

^R_1206

68K

R23A

^R_1206

SP_B

G

P1

2+

1+

2-

1-

R24

3.01K

^R_0805

MT2

MT1

BR-POS

SPEAKON

BR-NEG

Q113

P1

D

MAC224

C

B

DWGNO.

SH-002451-00

SH

2

REV

4

C173 100-25V

P1

1N4148

R156

0.22-3W

R159

0.22-3W

100-25V

^D_SOT-23

Q170

RFZ44

TO -VMED

1.5-2W

1N4004

1.5-2W

C180

R181

D117

D118

R182

2

P1

MUR1520

R188

D178

12000-63V

R180

5.1K-5W

D175

MUR1520

0.1-250V

12000-63V

SEE SH 3

12000-63V

D176

5.1K-5W

12000-63V

12V-1W-1N4742A

C174

CT_A

.1-250V

C120

C121

C122

C175

C123

F100

25A-125V

+110_A

+55_A

R165

15K-1W

5.6-2W

0.068-250V

R161

12-5W

R154

12-5W

0.068-250V

-55_A

-110_A

DC FAULT PROTECTION

D119

2N5064

C129

22-25NP

R160

L100

2uH

C124

P1

C126

BR_BAL

8

7

6

CHANNEL-1

26-LINE RIBBON CABLE CONNECTS BREAKAWAY INPUT PCB TO MAIN PCB

C101

180p-5%

U10:1

LM13600M

A1

5

R102

1K

^R_0805

P1

1

R103

-14V

.1-50V-10%

11

6

10.0K ^R_0805

^C_0805

C103

180p-5%

^C_0805

C102

^C_1206

^R_0805

NE5532

U101:1

+

3

-

2

^R_0805

+14V

3

+

2

4

-

C104

150K

R104

J1:1

J2:1

1

GND

J1:2

2

+INA

5

4

C1

470p 5%

GND

SW1:1

SW1:2

SW1:3

SW1:4

SW1:5

SW1:6

SW1:7

SW1:8

SW1:9

SW1:10

^C_1206

C2

470p 5%

^C_1206

11

12

13

14

15

BR M SEND (HI-SIGA)

BR MONO FEED

16

17

18

19

20

FILTSEND B (POT)

3

2

1

2

3

4

5

6

7

8

9

10

C3

C4

CLIP-LIMA

FILT-CAPA

FILT-SENDA

FILT-BYPA

FILTBYP B

FILTCAP B

CLIP LIM B

-IN B

+IN B

J1:3

3

-INA

470p 5%

^C_1206

J1:4

4

470p 5%

^C_1206

J1:5

5

J1:6

6

GND

J1:7

7

J1:8

8

J1:9

9

J1:10

10

GND

J1:11

11

J1:12

12

GND

J1:13

13

J1:14

14

GND

J1:15

15

J1:16

16

J1:17

17

J1:18

18

J1:19

19

J1:20

20

J1:21

21

GND

J1:22

22

J1:23

23

GND

J1:24

24

J1:25

25

J1:26

26

GND

J2:2

J2:3

J2:4

J2:5

J2:6

J2:7

J2:8

J2:9

J2:10

J2:11

J2:12

J2:13

J2:14

J2:15

J2:16

J2:17

J2:18

J2:19

J2:20

J2:21

J2:22

J2:23

J2:24

J2:25

J2:26

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

A1

BR MONO FEED

BR_RET

A1

BR_BAL

BR_CUT

C130

100p-50V

^C_1206

F_BYP_B

F_SND_B

F_30_B

CLIP_B

-IN_B

+IN_B

R100

10.0K

^R_0805

R101

10.0K

^R_0805

FILT-CAPA

FILT-SENDA

FILT-BYPA

SW TOGND FOR CLIP LIM

8

C132 47P-50V ^C_1206

R197

100

^R_0805

7

R105

10.0K

R106

10.0K

.1-50V-10%

^R_1206

1

R107

^C_1206

C105

39K

ROUTE THIS GROUND TO "A" GNDAT JI-2 INPUT CABLE

A1

C106

47-10NP

R112

see below

R112: 10K LINEAR (up to Nov 2001)

2.5K LINEAR (effective Dec 2001) RIGHTANGLE POT

R108

7.50K ^R_0805

^R_0805

100

R109

R110

R111

820

^R_0805

100-25V

CW

CCW

A1

C131

100

A1

R20

3.3-1W

A1 P1

R_RES1W

CHANNEL 1 GAIN

R113

W

274

^R_0805

270

R196

^R_0805

.001-5%

R114

A1

^R_0805

Q100

3906

^Q_BJTP_SOT-23

ROUTE THIS GROUND TO "P" GNDAT HEATSINK COMMON BETWEEN CHA AND CH B

R116

C107

.22-5%

C108

.15-5%

R117

^R_0805

R114:

4.7K (up to Apr 2002)

1.2K (effective May 2002)

R115

100-16NP

^R_0805

A1

R126

A1

^R_0805

SPEAKER BUS -- BEFORE FUSE

^R_1206

27p-200V-COG

^C_1206

R116: 820K (up to Apr 2002) 1 M (effective May 2002)

^R_1206

C109

.15-5%

24K

^R_0805

820

^R_1206

C125

R138

4.7K

1K

R166

464K

C111

R121

R120

^R_0805

24K

^R_0805

23.2K-1%-1/2W

^R_1206

5

8

6

-

5

+

4

-15V_A

R120: 390 (up to Apr 2002)

Ω

348 (effective May 2002)

Ω

R122

23.2K-1%-1/2W

R123

R167

464K

C172

.0033

R190

2.00K

^R_0805

D101

15V-1W

C110

27p

^C_0805

7

U101:2

NE5532

D100

15V-1W

R177

12K-1W

+15V_A

C114

C112

220-25V

P1

R124

C113

220-25V

SPEAKER BUS --AFTER FUSE

2.00K

^R_0805

C179

.0033

R173

150K

^R_1206

R178

150K

^R_1206

^Q_BJTN_SOT-23

R125

47K

^R_1206

0.0015u, 250V

75

^R_0805

D102

1N4148

^D_SOT-23

D103

1N4148

^D_SOT-23

LD100

RED

CLIP CH 1

R194

12K-1W

R195

^D_SOT-23

^C_1206

R127

4

R174

4.7K

^R_0805

R179

4.7K

^R_0805

Q101

3904

R128

10K

^R_0805

D104

P1

1N4148

^Q_BJTN_SOT-23

5.6V 0.25W (up to Feb 2002)

4.7V 0.25W (effective Mar 2002)

D105

1N4148

^D_SOT-23

D106

1N4148

^D_SOT-23

5.6V 0.25W (up to Feb 2002)

4.7V 0.25W (effective Mar 2002)

R127: 100 (up to Feb 2002)

Ω

^R_0805

75 (effective Mar 2002)

Ω

P1

R186

150K

^R_1206

R192

150K

^R_1206

D170

10V-1N4740A

.36W at full clip

R129

1.5K

^R_0805

C181

0.01

R130

820

^R_1206

D107:

R131

100

BIAS

D110:

R183

47K

^R_0805

R187

4.7K

^R_0805

R193

4.7K

^R_0805

POS STEP DRIVER

3.9V R172

470K

^R_0805

U170

1

^U_LM311

GND

2

3

4

V-

D112

1N4148

LD101

YELLOW

SIG CH 1

^LM311-SMT

^D_SOT-23

D174

Q102 3904

D107

D108

1N4934

C115

^C_1206

0.0022u, 10%

D109

1N4934

CW

W

R134

C116

50

.022

CCW

NTC

D110

820

R132

^R_1206

D111

R133

1N4148

^D_SOT-23

8.2K-5W

R135

8.2K-5W

C176

47pF-50V-5%

^C_0805

R185

470K

^R_0805

1

GND

^U_LM311

2

3

4

V-

^LM311-SMT

NEG STEP DRIVER

BAL/STR

R118

8.2K-5W

R119

8.2K-5W

U171

V+

BAL

BAL/STR

-110_A

R171

8

7

6

^R_0805

5

+110_A

R136

22-1W

1N4148

^D_SOT-23

R139

2.2K

R140

2.2K

1N4148

^D_SOT-23

R137 22-1W

FP

8

V+

C178

7

6

5

BAL

5.90K

R175

3.01K

FP

CW

CCW

CW

^R_0805

D113

W

NEG CURRENT LIMIT

POS CURRENT LIMIT

W

D114

R184

.1-50V-10%

^D_SOT-23

Q103

2SA1943

2SC5200

5.90K

^D_SOT-23

^C_1206

3

D171

1N4148

^Q_BJTP_SOT-23

R_RES1W

Q104

^R_0805

D177

1N4148

R191

2.2K

^R_0805

^Q_BJTN_SOT-23

Q171

3904

Q172

3906

R142

0.22-3W

Q107

2SA1943

Q105

MJE15032

R146

3.3-1W

R147

3.3-1W

Q106 MJE15033

Q108

2SC5200

R143

0.22-3W

Q173

3904

Q175 3906

C170

47pF-50V-5%

^C_0805

10-35V

R176: 12K (up to Oct 2003) 47K (effective Nov 2003)

R148

0.22-3W

Q109

2SA1943

D116

1N4148

^D_SOT-23

C119

P1

.022

D115

1N4148

^D_SOT-23

Q110

2SC5200

R149

0.22-3W

C177

47pF-50V-5%

^C_0805

^Q_BJTN_SOT-23

R189

47

^R_0805

^Q_BJTP_SOT-23

C171

R176

R152

R153

^R_0805

0.22-3W

Q111 2SA1943

2SC5200

0.22-3W

R170

^R_0805

R198

2.2K-5W

R157

2.2K-5W

R158

2.2K-5W

Q112

Q174

RFZ44

47

D173

A

7.12 RMX2450 Schematic Diagram 1 of 4

SIZE FSCM NO. DWG NO.

D

SCALE CADFILE NO. SHEET

NONE

P:GPE PRODUCTS\PRMX-SERIESQSC245 0

SH-002451-00

PLOT DATE: Thu Sep 07, 2000

1

NOTES: UNLESS OTHERWISE SPECIFIED

8

Channel 1

7

6

5

4

3

2

44 QSC Audio Products, LLC

REV

4

OF

42

THIS DOCUMENT CONTAINSPROPRIETARY INFORMATION WHICH ISTHE PROPERTY OF QSC AUDIO PRODUCTS, THATMAY NOT BE DISCLOSED, REPRODUCED OR USED WITHOUT EXPRESS WRITTEN CONSENT FROM QSC AUDIO PRODUCTS.

D

C

B

A

Gray shading indicates signal path

8 67 5

+IN_B

SEESH1

-IN_B

SEESH1

F_30_B

F_BYP_B

SEESH1

CLIP_B

SEESH1

BR_RET

R200

10.0K

^R_0805

R201

10.0K

^R_0805

9

LM13600M

10

-14V

C201

180p-5%

^C_0805

R205

10.0K

^R_0805

NE5532

R202

^R_0805

U201:1

+

3

1K

-

2

R206

10.0K

^R_0805

C204

180p-5%

^C_0805

SW-30 HZ

SW-FILTBYPASS

+14V-A

R207

+

-

C205

39K

14

15

13

100-25V

U10:2

12

16

R203

10.0K ^R_0805

150K

R204

^R_1206

SW-GND FOR CLIP LIM

BR MONO RETURN -- CAUTION, SENSITIVE NODE

1

^R_0805

A1

R208

7.50K ^R_0805

^R_0805

100

R209

R211

820K

^R_0805

4-5 MACHARGE CURRENT 1 MADISCHARGE.

CHANNEL-2

C206

47-10NP

CW

R213

W

R212

274

^R_0805

CCW

A1

R212: 10K LINEAR (up to Nov 2001)

2.5K LINEAR (effective Dec 2001) RIGHTANGLE POT

.001

C231

270

R296

^R_0805

A1

100

R210

^R_0805

A1

Q200

3906

^Q_BJTP_SOT-23

J204:10

J104:10

R214

^R_0805

R214:

A1

4.7K (up to Apr 2002)

1.2K (effective May 2002)

R215

C207

.22-5%

C208

.15-5%

820

^R_1206

SPEAKER BUS -- BEFORE FUSE

10

R216: 820K (up to Apr 2002)

R216

1 M (effective May 2002)

^R_1206

.15-5%

24K

R217

348 (effective May 2002)

C225

100-16NP

R238

4.7K

A1

^R_0805

J204:5

J104:5

R266

464K

^R_1206

C211

27p-200V-COG

^C_1206

C209

R221

^R_0805

390 (up to Apr 2002)

Ω

R220

^R_0805

R220:

24K

^R_0805

5

LD201

+15V_B

8

6

-

5

+

4

-15V_B

R222

23.21K-1%-1/2W

YELLOW

6

220-25V

D201

15V-1W

C210

27p

^C_0805

7

U201:2 NE5532

4

C212

D200

15V-1W

220-25V

C272

.0033

R290

2.00K

^R_0805

C213

12K-1W

J204:6

J104:6

R277

J104:4

J204:4

P1

R295

2.00K

^R_0805

C279

.0033

C_MYL2_AI

^R_1206

^Q_BJTN_SOT-23

R225

4.7K

^R_1206

C214

0.0015u, 250V 5%

R224

75

^R_0805

^D_SOT-23

LD200

RED

CLIP CH 2

R273

150K

R278

150K

^R_1206

^C_1206

D202

1N4148

D203

1N4148

R294

12K-1W

Q201 3904

D204

1N4148

^D_SOT-23

R227

D270

R274

4.7K

^R_0805

R279

10V-1N4740A

4.7K

^R_0805

R228

R229

10K

1.5K

^R_0805

C281

0.01

P1

J204:7

7

J104:7

7

D205

1N4148

^D_SOT-23

D206

R231

1N4148

R227: 100 (up to Feb 2002)

Ω

75 (effective Mar 2002)

Ω

R286

R_RES1W

150K

^R_1206

BIAS

D210:

^D_SOT-23

5.6V 0.25W (up to Feb 2002)

4.7V 0.25W (effective Mar 2002)

^R_0805

P1

R292

150K

^R_1206

POS STEP DRIVER

3.9V R272

470K

^R_0805

U270

1

GND

2

3

BAL/STR

4

V-

D274

D208

D209

100

R283

^R_0805

^LM311-SMT

D212

1N4148

^D_SOT-23

Q202 3904

^Q_BJTN_SOT-23

SIGCH2

820

R230

^R_1206

D207:

5.6V 0.25W (up to Feb 2002)

D207

4.7V 0.25W (effective Mar 2002)

1N4934

C215

^C_1206

0.0022u, 10%

1N4934

CW

W

R234

C216

50

.022

CCW

NTC

D210

820

R232

^R_1206

D211

R233

1N4148

8.2K-5W

^D_SOT-23

R235

8.2K-5W

C276

47K

47pF-50V-5%

^C_0805

R285

470K

R287

^R_0805

4.7K

^R_0805

1

2

3

4

R293

4.7K

^R_0805

NEG STEP DRIVER

R218

8.2K-5W

R219

8.2K-5W

GND

V-

^LM311-SMT

1432

C270

3906

3904

Q271

47pF-50V-5%

^C_0805

10-35V

12K (up to Oct 2003)

47K (effective Nov 2003)

R248

0.22-3W

Q209 2SA1943

C271

R276:

R276

R252

^R_0805

0.22-3W

Q211 2SA1943

^R_0805

R271

5.90K ^R_0805

8

V+

R275

7

6

3.01K

^R_0805

5

BAL

+110_B

R236

22-1W

FP

D271

1N4148

^D_SOT-23

Q203

2SA1943

^Q_BJTN_SOT-23

Q272

^Q_BJTP_SOT-23

R242

0.22-3W

Q207

2SA1943

R270

47

C273 100-25V

D273

P1

1N4148

R256

^D_SOT-23

0.22-3W

Q270

RFZ44

TO -VMED

D217

1N4004

R281

1.5-2W

R280

5.1K-5W

D275

MUR1520

C220

12000-63V

C274

.1-250V

D216

D276

MUR1520

5.1K-5W

C280

12000-63V

SEE SH 3

12000-63V

.1-250V

12000-63V

D278

C221

CT_B

C222

C275

C223

12V-1W-1N4742A

-110_B

U271

R239

BAL/STR

R240

R_RES1W

Q208

P1

R249

1N4148

^D_SOT-23

C219

.022

1N4148

^D_SOT-23

2SC5200

0.22-3W

D215

Q210

R253

2SC5200

0.22-3W

R298

2.2K-5W

R257

2.2K-5W

R258

2.2K-5W

Q212

R259

0.22-3W

D218

1N4004

P1

R282

1.5-2W

Q205

MJE15032

D213

1N4148

^D_SOT-23

2.2K

1N4148

^D_SOT-23

R237

22-1W

FP

R246

CW

3.3-1W

W

NEG CURRENT LIMIT

CCW

POS CURRENT LIMIT

W

R247

3.3-1W

CW

D214

2SC5200

Q204

R243

Q206 MJE15033

2SC5200

0.22-3W

C277

R284

5.90K ^R_0805

D277

C278

.1-50V-10%

^C_1206

1N4148

^D_SOT-23

R291

2.2K

^R_0805

8

V+

7

6

5

BAL

Q275

3904

3906

Q273

47pF-50V-5%

^C_0805

^Q_BJTN_SOT-23

R289

47

^R_0805

^Q_BJTP_SOT-23

Q274

RFZ44

R288

100-25V

+110_B

+55_B

F200

25A-125V

-55_B

-110_B

R265

15K-1W

R260

5.6-2W

L200

2uH

C224

.068-250V

R261

12-5W

P1

R254

12-5W

C226

0.068-250V

11

C229

J204:11

J104:11

SP_B

DC FAULT PROTECTION

D219

E200

E201

2N5064

JP15

5-WAY BINDING POST CH 2

JP16

D220

J203 -

22-25NP

WIRES TO SPEAKER OUTPUT PCB

R262

12-5W

R255

12-5W

2N5064

R263

10-1/4W

100-1/4W

CHANNEL 2

SPEAKER OUTPUT

J203 +

J200

SPEAKER CONNECTORS ON BREAKAWAYPCB FROM SHEET ONE

D

MT2

G

Q213

MAC224

MT1

R264

P1

BR-POS

TO CH 1 SHEET 1

2+

1+

2-

1-

SPEAKON

BR-NEG

C

B

DWGNO.

SH-002451-00

SH

3

REV

4

A

7.13 RMX2450 Schematic Diagram 2 of 4

SIZE FSCM NO. DWG NO.

D

SCALE CADFILE NO. SHEET

NONE

PLOT DATE: Thu Sep 07, 2000

SH-002451-00

RMX2450-4.sch

1

NOTES: UNLESS OTHERWISE SPECIFIED

8

Channel 2

7

6

5

4

3

2

RMX Series Technical Service Manual (2RU models) 45 TD-000098-00 rev. C

REV

4

OF

43

THIS DOCUMENT CONTAINSPROPRIETARY INFORMATION WHICH ISTHE PROPERTY OF QSC AUDIO PRODUCTS, THATMAY NOT BE DISCLOSED, REPRODUCED OR USED WITHOUT EXPRESS WRITTEN CONSENT FROM QSC AUDIO PRODUCTS.

D

8 67 5

RECTIFIER BR100-201 CIRCUIT IS DRAWN FOR CHASSIS MTG OF RECTIFIERS. E-POINTS ARE WIRE CONNECTIONS.

U-I CORE POWER TRANSFORMER NOTE SPLIT SECONDARY WIRING

AC VOLTAGE PROGRAMMING TERMINALS

C

AC INPUT,HIGH (ALL)

100V 120V 240V

TRANSFORMER PRI LEADS

BRN

GRY

RED

BLK

WHT

BRN

-

BLUBLU

-

BLK

GRY

RED

-

WHT

BRN

GRY

BLK

-

--

WHT

BLU

RED

!

R21

1 OHM 30A

QUICK CONNECT PC-MTD TABS

J4A

J5A

J6A

J8A

J9A

J7A

J2A

J3A

FROM EACH LEG TO EACH CHANNEL

BRN

120V

20V

BLU

0V

BLK

COIL ONE

COIL TWO

GRY

120V

20V

RED

0V

WHT

E1

E2

E3

E4

E5

C128

0.22-250V

E6

E7

E8

E9

E10

E11

C228

0.22-250V

E12

0.22-250V

3

AC2

1

4

+

-

BR101

AC1

400V-25A

2

BR201

2

400V-25A

AC1

1

4

+

-

AC2

3

AC INPUT,LOW (ALL)

MAINTAIN FULL PRI-SEC CREEPAGE

B

IEC AC INLET

NEUT

CIRCUIT BREAKER USA: 15A-125V EUROPE: 7.5A-250V

1

LINE

2

3

GND

!

JP12

JSW

TO POWER SWITCH

JP10

20 VAC TOFAN POWER RECTIFIER

C127

BR100 400V-25A

1

C227

0.22-250V

1.1 AMP

3

AC2

4

+

-

AC1

2

BR200

2

400V-25A

AC1

4

+

-

AC2

3

R29

12-5W

3

AC1

R1

1

2

E13

E14

E15

E16

E17

E18

E19

E20

+

-

E112

E114

C10

0.047-400V

R28

12-5W

BR1

200V-1A

AC2

1000-35V

E113

E115

E212

E214

E213

E215

4

C6

CT_A

SEE SH 1

+110_A

+55_A

-55_A

-110_A

+110_B

+55_B

-110_B

-55_B

CT_A

SEE SH 2

CT_B

J21:1

1

J157:1

1

D1

1N4004

LD1 GRN

PILOT LED

R2

33K-2W

R3

1.0M

D2

1N4148

^D_SOT-23

60C 100 OHM

ATTACHTO HS-2

8

R4

ATTACHTO HS-1

9

28V PRI-SIDE DC FAN SUPPLY

MUTING AND THERMAL PROTECTION.

R27

330K

^R_1206

R5

33K-2W

D3

1N4148

^D_SOT-23

J204:8

J104:8

R7

60C 100 OHM

J104:9

J204:9

1.0M

R6

^R_1206

1N4148

^D_SOT-23

D5

1N4148

^D_SOT-23

1N4148

^D_SOT-23

1N4148

^D_SOT-23

D15

15V

D4

Q1

300V-.2A

^Q_BJTN_SOT-23

R26

220K

^R_0805

R8

2500V HI-POT

J157:3

3

J21:3

2.0K

2

!

^R_0805

J157:2

J21:2

1

263

D7

D6

R10

150K

^R_1206

C7

4.7-250V

MAINTAIN FULL PRI-SEC CREEPAGE

5

U2

4

4N29

1N4148

^D_SOT-23

R15

464K

^R_1206

R12

J104:12

J104:2

J204:2

C11

.1-5OV

12

J204:12

12

+15V_A

Q9

3904

^Q_BJTN_SOT-23

P1

Q7 3906

^Q_BJTP_SOT-23

-15V_A

J204:13

13

J104:13

13

R25

47

^R_0805

3904

^Q_BJTN_SOT-23

3906

^Q_BJTP_SOT-23

BR_CUT

Q8

Q6

A1

3

C9 100pF

^C_1206

R30

100

^R_0805

J204:3

J104:3

BR_CUT-A

+14V

+15V_A

Q5

MPSA06

1

-14V

2 PIN HEADER

1

2

1N4004

D13

1N4004

D11

1N4004

D10

1N4004

J18:1

TO DC FAN

J18:2

D12

2

J204:1

J104:1

+15_B

-15V_B

-15V_A

+

-

D8

15V

C8 47-50V

P1

D14

470K

^R_1206

^Q_BJTP_SOT-23

D9

1N4148

^D_SOT-23

R9

6.81K ^R_1206

R13

2.0K ^R_0805

R18

220K

^R_1206

Q4

3906

R14

P1

6.81K

Q3

TIP31C

R19

^R_1206

6.8K

P1

^R_1206

R17

120-2W

D1432

C

B

DWGNO.

SH-002451-00

SH

4

REV

4

A

7.14 RMX2450 Schematic Diagram 3 of 4

SIZE FSCM NO. DWG NO.

D

SCALE CADFILE NO. SHEET

NONE

PLOT DATE: Thu Sep 07, 2000

SH-002451-00

RMX2450-4.sch

1

NOTES: UNLESS OTHERWISE SPECIFIED

8

Power Supply

7

6

5

4

3

2

46 QSC Audio Products, LLC

REV

4

OF

44

7.15 RMX2450 Schematic Diagram 4 of 4

Power Supply Revision

RMX Series Technical Service Manual (2RU models) 47 TD-000098-00 rev. C

7.16 RMX Power Transformer Configurations

March 2007 and later

48 QSC Audio Products, LLC

THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION WHICH IS THE PROPERTY OF QSC AUDIO PRODUCTS, THAT MAY NOT BE DISCLOSED, REPRODUCED OR USED WITHOUT EXPRESS WRITTEN CONSENT FROM QSC AUDIO PRODUCTS.

D

8 7654321

REVISIONS

D

INPUT PCB

OUTPUT PCB

1724-340C-0102

E100

WHI

E101

E200

E201

GRY

WHI

GRY

26 CONDUCTOR RIBBON CABLE WITH PIN-TO-PIN INTERCONNECTS

J1

1

J203

1

MAIN PCB

1724-330A-0001

JP14

JP13

JP15

JP16

J103

CH 1 SPKR OUTPUT

CH 1 SPKR COMMON

CH 2 SPKR OUTPUT

CH 2 SPKR COMMON

J203

REV DESCRIPTION EFF. DATE APPROVED/DATECHK

E9

E10

INPUT PCB

1724-340B-0102

26

WIRE ASSY

C

12

26

E112

GRN

E212

E11

E12

RED

BLK

RED

BLK

C

FAN ASSY

1 2

J128

3

3-PIN CABLE ASSY

J18

1 2

B

E1 E2 E3 E4 E5 E6 E7 E8

J21

-VCC_B

+_BVCC

1 2 3

B

DWG NO.

SH-0025000

TRANSFORMER

(1806-2505-0)

AC POWER CORD

A

HOT GND NEUT

BRN GRN BLU

CIRCUIT-

BREAKER

AC POWER

SWITCH

BRNBRN

RED •

BRN

BLU

GRN

BLK

BLU •

WHT

VIO

RED

GRY

120V 230V 100V

J3A J6A J3A J7A J7A J9A

J9A J9A J7A

J8A J5A J4A J4A J4A J8A

J2A J2A J2A

JP12

JP10

1724-340A-0102

PWR PCB

-VCC_A

+VCC_A

AUDIO PRODUCTS, INC.

COSTA MESA, CALIFORNIA

SH

1

REV

A

WIRING DIAGRAM,

RMX 850

1 OF 1

REV

A

NOTES: UNLESS OTHERWISE SPECIFIED

876 54321

RMX Series Technical Service Manual (2RU models) 49 TD-000098-00 rev. C

SCALE

NONE

SHEET

7.17 RMX850 Chassis Wiring Diagram

THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION WHICH IS THE PROPERTY OF QSC AUDIO PRODUCTS, THAT MAY NOT BE DISCLOSED, REPRODUCED OR USED WITHOUT EXPRESS WRITTEN CONSENT FROM QSC AUDIO PRODUCTS.

D

8 7654321

REVISIONS

D

INPUT PCB

OUTPUT PCB

1724-340C-0102

E100

WHI

E101

E200

E201

GRY

WHI

GRY

26 CONDUCTOR RIBBON CABLE WITH PIN-TO-PIN INTERCONNECTS

J1

1

J203

1

MAIN PCB

1724-330A-0001

JP14

JP13

JP15

JP16

J103

CH 1 SPKR OUTPUT

CH 1 SPKR COMMON

CH 2 SPKR OUTPUT

CH 2 SPKR COMMON

J203

REV DESCRIPTION EFF. DATE APPROVED/DATECHK

E9

E10

INPUT PCB

1724-340B-0102

26

WIRE ASSY

C

12

26

E112

GRN

E212

E11

E12

RED

BLK

RED

BLK

C

FAN ASSY

1 2

J128

3

3-PIN CABLE ASSY

J18

1 2

B

E1 E2 E3 E4 E5 E6 E7 E8

J21

-VCC_B

+_BVCC

1 2 3

B

DWG NO.

SH-0025000

TRANSFORMER

1806-2506-0

RED •

RED

AC POWER CORD

A

HOT GND NEUT

BRN GRN BLU

CIRCUIT-

BREAKER

AC POWER

SWITCH

BRNBRN

GRN •

BRN

BLU

GRN

BLK

BLU •

WHT

BLU

RED

VIO •

GRY

VIO

120V 230V 100V

J3A J6A J3A J7A J7A J9A

J9A J9A J7A

J8A J5A J4A J4A J4A J8A

J2A J2A J2A

JP12

JP10

PWR PCB

1724-340A-0102

-VCC_A

+VCC_A

AUDIO PRODUCTS, INC.

COSTA MESA, CALIFORNIA

SH

1

REV

A

WIRING DIAGRAM,

RMX 1450

1 OF 1

REV

A

NOTES: UNLESS OTHERWISE SPECIFIED

876 54321

50 QSC Audio Products, LLC

SCALE

NONE

SHEET

7.18 RMX1450 Chassis Wiring Diagram

THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION WHICH IS THE PROPERTY OF QSC AUDIO PRODUCTS, THAT MAY NOT BE DISCLOSED, REPRODUCED OR USED WITHOUT EXPRESS WRITTEN CONSENT FROM QSC AUDIO PRODUCTS.

D

8 7654321

REVISIONS

D

INPUT PCB

REV DESCRIPTION EFF. DATE APPROVED/DATECHK

OUTPUT PCB

1724-342A-0102

E100

WHI

E101

E200

E201

GRY

WHI

GRY

26 CONDUCTOR RIBBON CABLE WITH PIN-TO-PIN INTERCONNECTS

J1

1

J203

1

MAIN PCB

1724-332A-0003

JP14

JP13

JP15

JP16

J103

CH 1 SPKR OUTPUT

CH 1 SPKR COMMON

CH 2 SPKR OUTPUT

CH 2 SPKR COMMON

J203

PRODUCTION RELEASE PER ECO X MPA

C

B

A

NOTES: UNLESS OTHERWISE SPECIFIED

876 54321

AC POWER CORD

HOT GND NEUT

BRN GRN BLU

RED 5

RED 4

BLK 3

BLK 2

BLK 1

RED 5

RED 4

BLK 3

BLK 2

BLK 1

1 2 3

INPUT PCB

1724-342A-0102

E112

E114

E113

26

WIRE ASSY

12

FAN ASSY

26

E117

GRN

E115

E116

E217

E212

E214

E213

E215

E216

J257

3-PIN CABLE ASSY

J18

CT_B

-55V_B

-110V_B

+55V_B

+110V_B

CT_A

-55V_A

-110V_A

+55V_A

+110V_A

1 2 3

CIRCUIT-

BREAKER

TRANSFORMER

1806-2507-0

RED

AC POWER

SWITCH

BRN

RED(2)

1 2

E1 E2 E3 E7 E8 E9 E4 E5 E6 E10 E11 E12

VIO

BLU

GRY

BLU(2)

GRN

ORG

GRN(2)

RED

WHT

BLU

BLK

BRN

BRNBRN

VIO(2)

GRY

YEL

120V 230V 100V

J5A J9A J5A J7A J7A J3A

J3A J3A J7A

J2A J8A J6A J6A J6A J2A

J4A J4A J4A

JP12

JP10

PWR PCB

1724-342A-0102

7.19 RMX1850HD and RMX2450 Chassis Wiring Diagram

FG-002450-00 RMX 2450

NEXT ASSY USED ON

FIRST APPLICATION

UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE IN INCHES

DO NOT SCALE DRAWING

DRAWN

CHECKED

ISSUED

APPROVALS

MILA P.

PARTS LIST

DATE

12-12-00

SCALE

AUDIO PRODUCTS, INC.

COSTA MESA, CALIFORNIA

WIRING DIAGRAM,

RMX 2450

DWG NO.

NONE

SH-002450-00

SHEET

1 OF 1

C

B

SH-0025000

1

A

REV

A

DWG NO.

SH

REV

RMX Series Technical Service Manual (2RU models) 51 TD-000098-00 rev. C

52 QSC Audio Products, LLC

“QSC” and the QSC logo are registered trademarks of QSC Audio Products, LLC 1665 MacArthur Blvd. Costa Mesa, CA 92626

Phone +1 (714) 957-7150 (800) 772-2834 (USA only) FAX +1 (714)754-6173

www.qscaudio.com

Qsc RMX 850, RMX 1450, RMX 1850HD, RMX 2450 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual