QSC RMX-2450 Service manual

RMX™ Series

▲▲

▲ RMX 850

▲▲

▲ RMX 1450

▲▲

▲ RMX 2450

▲▲

Technical Service Manual

*TD-000098-00*

TD-000098-00

Rev. B

RMX Series

Technical Service Manual

RMX 850

RMX 1450

RMX 2450

QSC Audio Products, Inc.

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. B. Released February 2002.

RMX Series Technical Service Manual 1

RMX Series Performance Specifications

RMX 850 RMX 1450 RMX 2450

OUTPUT POWER

in watts

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

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

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

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

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

2Ω per channel 430 700 1200

Bridge Mono:

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

DYNAMIC HEADROOM 2 dB @ 4Ω DISTORTION

SMPTE-IM < 0.01% < 0.01% < 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 VOLTAGE GAIN 31.6× (30 dB) 40× (32 dB) 50× (34 dB) INPUT SENSITIVITY, V RMS

full rated power @ 8Ω 1.15v (+3.4 dBu) 1.15v (+3.4 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, AC coupling, triac crowbar (on each channel) OUTPUT CIRCUIT TYPE AB AB H

AB: Class AB complementary linear output H: Class AB 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)

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

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

(both channels driven)

Multiply currents by 0.5 for 230V units

@ 120 VAC

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SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE

2 QSC Audio Products, Inc.

Table of Contents

RMX Series Performance Specifications ........................................................................................................................................ 4

1. Introduction ........................................................................................................................................................................................ 6

1.1 Service bulletins ................................................................................................................................................................................ 6

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

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

1.4 Series description ............................................................................................................................................................................. 8

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

2. Component identification and pinout ........................................................................................................................................... 10

3. Troubleshooting: Symptoms, causes, & remedies ..................................................................................................................... 12

3.1 Excessive current draw ..................................................................................................................................................................... 12

3.2 Protection, muting, and turn-on/turn-off delay problems ................................................................................................................ 12

3.3 Faults with signal present ................................................................................................................................................................. 13

3.4 Instability ........................................................................................................................................................................................... 13

3.5 Power supply & rail balancing problems .......................................................................................................................................... 14

4. RMX calibration procedures .......................................................................................................................................................... 14

4.1 Setting bias ....................................................................................................................................................................................... 14

4.2 Setting positive and negative current limits ..................................................................................................................................... 15

5. Servicing RMX amplifiers ............................................................................................................................................................... 16

5.1 Mechanical disassembly and re-assembly ....................................................................................................................................... 16

6. Replacement parts ............................................................................................................................................................................ 17

6.1 RMX 850 Replacement Parts ............................................................................................................................................................ 17

6.2 RMX 1450 Replacement Parts .......................................................................................................................................................... 20

6.3 RMX 2450 Replacement Parts .......................................................................................................................................................... 23

7. Schematics and diagrams ............................................................................................................................................................... 27

7.1 RMX Assembly/Disassembly Diagram 1 of 2

7.2 RMX Assembly/Disassembly Diagram 2 of 2

7.3 RMX 850 Schematic Diagram 1 of 3

7.4 RMX 850 Schematic Diagram 2 of 3

7.5 RMX 850 Schematic Diagram 3 of 3

7.6 RMX 1450 Schematic Diagram 1 of 3

7.7 RMX 1450 Schematic Diagram 2 of 3

7.8 RMX 1450 Schematic Diagram 3 of 3

7.9 RMX 2450 Schematic Diagram 1 of 3

7.10 RMX 2450 Schematic Diagram 2 of 3

7.11 RMX 2450 Schematic Diagram 3 of 3

7.12 RMX 850 Chassis Wiring Diagram ................................................................................................................................................. 38

7.13 RMX 1450 Chassis Wiring Diagram ............................................................................................................................................... 39

7.14 RMX 2450 Chassis Wiring Diagram ............................................................................................................................................... 40

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

Channel 1 ...............................................................................................................................

Channel 2 ...............................................................................................................................

Power Supply .........................................................................................................................

Channel 1 .............................................................................................................................

Channel 2 .............................................................................................................................

Power Supply .......................................................................................................................

Channel 1 .............................................................................................................................

Channel 2 ...........................................................................................................................

Power Supply .....................................................................................................................

27

28

29

30

31

32

33

34

35

36

37

RMX Series Technical Service Manual 3

1. Introduction

1.1 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” (RMX 2450 only); RMX0002, “RMX Turn-on Delay” (all RMX models); RMX0003, “RMX 2450 Turn-off Mute” (RMX 2450); RMX0004, “RMX 2450 AC Wire Routing” (RMX 2450); RMX0005, “RMX 2450 AC Wire Replacement” (RMX 2450); and RMX0006, “RMX 2450 IRFZ44N Field Effect Transistors (RMX 2450).

1.2 The well-equipped service bench

To properly service RMX amplifiers, a technician needs the right tools. The technician’s service bench should have the following equipment:

• Digital multimeter with RMS AC voltage and current

• Digital clamp-on ammeter

• Dual-trace oscilloscope

• Audio distortion analyzer

• 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)

• 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)

• Low-distortion audio sine wave generator

• Philips and flat screwdrivers

• Soldering iron with a fine tip (25–60W recommended)

• Rosin-core solder (60/40 or 63/37)

• Long-nose pliers

• Diagonal cutters

• 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.

1.3 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. 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 1.1).

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 1.2).

4 QSC Audio Products, Inc.

Figure 1.1.

Solder braid

Figure 1.2.

Solder

Figure 1.3.

Tweezers

Figure 1.4.

Figure 1.5.

Solder

Figure 1.6.

Solder

Insertion 1 With a soldering iron and 60/40 or 63/37 eutectic-type solder, melt just enough solder onto one pad to

create a small mound (Figure 1.3).

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 1.4).

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 1.5). 5 Fully solder the tacked end of the component to its pad (Figure 1.6).

Three-terminal components (transistors, etc.)

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 compo-

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

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 60/40 or 63/37 eutectic-type 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.

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 60/40 or 63/37 eutectic-type 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.

RMX Series Technical Service Manual 5

1.4 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 three models: the RMX 850, RMX 1450, and RMX 2450. Each one has two audio channels and is two rack spaces tall. See page 2 for complete specifications.

The RMX 850 and RMX 1450 have single-sided printed circuit boards. The RMX 2450 uses double-sided boards.

1.5 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

Figure 1.7

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 short-term, 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 1.7. Note that unlike many bipolar supplies for complementary transistor arrangements, the secondary windings are not 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 RMX 2450, the secondaries are tapped to provide an intermediate set of bipolar rails for the Class H output circuitry. Figure 1.8 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

Figure 1.8

To Channel 2 Center Tap

+Vcc

-Vcc

+Vcc

-Vcc

+110V

-110V

+55V

-55V

Ch. 1 Center Tap

0.047 µF

12 5W×2Ω

Channel 1

Channel 2

Channel 1

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 1.9) 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.

C101

180p-5%

^C_0805

+IN_A

-IN_A

R100

10.0K

^R_0805

R101

10.0K

^R_0805

R102

1K

^R_0805

To LM13600 operational

transconductance amp

Figure 1.9

The feedback and shunt capacitors, C101 and C103, add a first-order 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 a 13600 dual operational transconductance amplifier (Figure 1.10). 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.

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

R105

10.0K

^R_0805

NE5532

U101:1

+

3

-

2

R106

10.0K

^R_0805

C103

180p-5%

A1

C106

1

10-50NP

R112

10K

10K LINEAR 3B RIGHT ANGLE POT

CW

R113

W

270

^R_0805

CCW

A1

6 QSC Audio Products, Inc.

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

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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 1.10

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 2.2K 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, the arrangement of the output transistors might look somewhat strange: the positive voltage swings are handled by PNP transistors, while the negative swings are handled by NPN devices. 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 approcahes 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.

DC protection

The RMX 2450 has 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 RMX 850 and RMX 1450 are AC coupled.

Class H

The RMX 2450 utilizes 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 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.

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.

RMX Series Technical Service Manual 7

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 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 RMX 2450) are equal in value and

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 forwardbias Q8, the transistor’s collector will collapse the +15V rail. At the same time, the emitter current from Q8 will flow 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.

2. Component identification and pinout

NE5532AN Dual operational amplifier

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

GROUND 1

NON-INVERTING

INPUT

INVERTING

INPUT

1

2

3

V-

4

V+

8

OUTPUT

7

BALANCE/

6

STROBE

BALANCE

5

4N29 Opto-isolator

1

2

3

6

5

4

LM13600 Dual operational transconductance amplifier

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

KAG

8 QSC Audio Products, Inc.

2N3904 (NPN) and 2N3906 (PNP) Small-signal transistors

C

3

12

BE

BCE

IRFZ44 TMOS power field effect transistor

MAC224 Triac

G

MT1

MT2

MJE15032 (NPN) and MJE15033 (PNP) Driver transistors

GDS

2SC5200 (PNP) and 2SA1943 (NPN) Power transistors

TOSHIBA

BCE

RMX Series Technical Service Manual 9

B C E

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 RMX 2450, 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 (RMX 2450) 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.

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.

10 QSC Audio Products, Inc.

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.

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

Excessive hum in loudspeaker when no signal is present (RMX 850 and RMX 1450)

Check R118, R119, R218, and R219.

Excessive current draw with signal present (RMX 2450)

• Check triacs Q113 and Q213.

• Check D119, D120, D219 and D220.

3.3 Faults with signal present

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

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

• (RMX 850 and RMX 1450) 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.

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 (RMX 2450 only), D115, and D116

(Channel 1) or R157, R258, R298 (RMX 2450 only), D215, and D216 (Channel 2).

• (RMX 850 and RMX 1450) Check R118 and R119 (Channel 1) or R218 and R219 (Channel 2).

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).

RMX Series Technical Service Manual 11

3.5 Power supply & 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

• 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 2-ohm load

without

(Channel 1, all models), R198 (Channel 1, RMX 2450 only) and diodes D115 and D116 (Channel 1, all models), or R257 and R258 (Channel 2, all models), R298 (Channel 2, RMX 2450 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

without

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.

ΩΩ

Ω or short (excessive or premature limiting)

ΩΩ

Ω, weak into short

ΩΩ

Ω

ΩΩ

clipping, check the resistors R157 and R158

clipping, usually the output section gain is too low: weak

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

12 QSC Audio Products, Inc.

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

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.

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

Table 1: Bias and current limit adjustments

• Digital multimeter

• Clamp-on digital current meter

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(e.g., Fluke 30 Clamp Meter)

• Small flat screwdriver (nonconductive) 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

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RMX Series Technical Service Manual 13

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 RMX 850 and RMX 1450, which have single-side printed circuit boards. The RMX 2450 has double-side boards; many of the through-hole 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 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 potentiometer 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.

9. Slide the channel modules toward the back so the potentiometer 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.

except

in the RMX 2450; its

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 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 trans-

former 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.

14 QSC Audio Products, Inc.

only

by QSC’s

6. Replacement parts

6.1 RMX 850 Replacement Parts

QSC part # Description Qty. Notes or Component Reference

Misc.

1806-2505-0 POWER TRANSFORMER 700 1 2113-1144-0 AC INLET 1 2444-1001-1 KNOB CONTROL 2 4134-8432-0 RACK-MOUNT BRACKET 2 5200-4717-0 ROCKER POWER SWITCH 1 5200-3532-0 CIRCUIT BREAKER 10A 1 For 120V models 5200-4730-0 CIRCUIT BREAKER 5A 1 For 230V models 7010-9640-0 AC CORD SET 15A 1 For 120V models 7009-8620-0 POWER CORD SET CE 1 For 230V models 8900-9050-1 DC FAN 24V 80X80 (+5V) 1

PCB-QZ010C-PSU AC board

153R-224K-5-Y1 CM 250V 0.22uF 10% RL 2 C127, C227 157Q-108M-5-X9E CE 35V 1000UF 20% RL 1 C6 3130-9270-0 IC 4N29 1 U2 4134-8851-0 FUSE HOLDER (DIA.6.3MM 4 REF: F100, F200 4701-202J-C RCF 1/8W 2K 5% ATS 1 R13 4701-474J-C RCF 1/8W 470K 5% ATS 1 R12 4701-682J-C RCF 1/8W 6.8K 5% ATS 2 R9, R14 4719-121J-1-X RMF 2W 120R 5% AL METAL 1 R17 4840-1760-0 DIODE RECT 1A 200V DB103 1 BR1 4840-2150-0 BRIDGE RECTIFIER 400V 2 BR100, BR200 4860-2620-5 TR TIP31C SAMSUNG 1 Q3 5100-1030-3A FU T10A 125V/250V 2 F100, F200 5400-0831-0 HEATSINK 1 REF: Q3 8910-0273-0 POLYSWITCH 0.15 ohm 1.1A 1 R1 8910-0275-0 THERMAL NTC 30A 1 ohm 1 R21

PCB-QZ010C-PWR1 Channel 1 module (left)

153F-223J-5-LQ CM 50V 0.022UF 5% RL 2 C116, C119 153F-332J-5-KW CM 50V 3300pF 5% RL 6x12 2 C117, C118 153R-683J-5-WWM CM 250V 0.068u 5% RL 1 C124 157F-476M-5-LU CE 50V 47uF 20% RL 1 C8 157R-475M-5-OV CE 250V 4.7u 20% RL 1 C7 1804-1030-0 SPRING COIL 2uH 1 L100 3700-4531-G LED 04mm GREEN W/STAND 1 LD1 4718-220J-2-P RMF 1W 22R 5% AT FP 2 R136, R137 4718-6R8J-1-X RMF 1W 6.8R 5% AL METAL 2 R146, R147 4719-153J-1-X RMF 2W 15K 5% AL METAL 2 R2, R5 4719-5R6J-1-X RMF 2W 5.6R 5% AL METAL 1 R160 471A-022K-5-N RMF 3W 0.22R 10% RL RGC3 6 R142, R148, R149, R152, R153, R159 471B-120J-1-X RMF 5W 12R 5% AL METAL 2 R161, R162 471B-202J-1-X RMF 5W 2K 5% AL METAL 2 R133, R135 471B-821J-1-X RMF 5W 820R 5% AL METAL 2 R157, R158 4756-1016-3-06 SVR H6 100R RH0615C 1 R131 4756-2226-3-06 SVR 2.2K H3 7X7.6 R0615C 2 R139, R140 4804-0040-1 DIODE IN4004 AL 5 D1, D11, D12, D117, D118 4804-9340-2 DIODE IN4934 AT 2 D108, D109 4837-5B10-2 DZ 1/2W 5.5-5.8V AT 2 D107, D110 4838-15V6-2 DZ 1W 15V AT TEMIC 2 D8, D15 4860-5020-5 TR MJE15032 1 Q105 4860-5030-5 TR MJE15033 1 Q106

RMX Series Technical Service Manual 15

Channel 1 module (continued)

QSC part # Description Qty. Notes or Component Reference

4860-5050-5 TR 2SC5200 T0-3P (L) 3 Q108, Q110, Q112 4860-5060-5 TR 2SA1943 T0-3P (L) 3 Q103, Q107, Q109 4860-8890-0 TR MPS A06 VCE 80V NS 1 Q5 8910-0062-0 CE 80V 4700U 20% RL 25X 2 C120, C121 8910-0274-0 THERMAL PTC 60C 100 ohm 1 R7 8910-0488-0 ROD THERMISTOR NTC 50ohm 1 R134

Channel 1 SMT parts

150F-222K-6-CF CC 50V 2200pF 10% 1206 1 1 C115 150H-102J-6-CF CC 100V 0.001U 5% 1206 1 C114 4720-103J-J RMG 1/10W 10K 5% 0805 1 R128 4720-152J-J RMG 1/10W 1.5K 5% 0805 1 R129 4720-202J-J RMG 1/10W 2K 5% 0805 1 R8 4720-224J-J RMG 1/10W 220K 5% 0805 1 R26 4720-470J-J RMG 1/10W 47R 5% 0805 2 R25, R124 4721-105J-6 RMG 1/8W 1M 5% 1206 2 R3, R6 4721-154J-6 RMG 1/8W 150K 5% 1206 1 R10 4721-224J-6 RMG 1/8W 220K 5% 1206 2 R18, R27 4721-473J-6 RMG 1/8W 47K 5% 1206 1 R125 4721-474J-6 RMG 1/8W 470K 5% 1206 1 R15 4721-682J-6 RMG 1/8W 6.8K 5% 1206 1 R19 4721-821J-6 RMG 1/8W 820R 5% 1206 2 R130, R132 4804-1480-3 DIODE LL4148 SM 15 D2–D7, D9, D14, D104, D111–D116 4853-9060-3 TR 3906 PNP SM 3 Q4, Q6, Q7 4860-0640-3 TR 3904 HFE 100-300 SM 4 Q8, Q9, Q101, Q102 4860-5110-3 TR KST42 1 Q1

PCB-QZ010C-PWR2 Channel 2 module (right)

153F-154J-5-NLM CM 50V 0.15UF 5% RL 4 C108, C109, C208, C209 153F-223J-5-LQ CM 50V 0.022UF 5% RL 2 C216, C219 153F-224J-5-NLM CM 50V 0.22UF 5% RL 2 C107, C207 153F-332J-5-KW CM 50V 3300pF 5% RL 6x12 2 C217, C218 153R-683J-5-WWM CM 250V 0.068u 5% RL 1 C224 157E-107M-5-KW CE 25V 100uF 20% RL 6x12 2 C105, C205 157E-227M-5-PU CE 25V 220uF 20% RL 4 C112, C113, C212, C213 157F-106M-5-LUN CE 50V 10¦F 20% RL 2 C106, C206 1804-1030-0 SPRING COIL 2uH 1 L200 2101-1991-0 8 PIN IC SOCKET DIP 2 REF: U101, U201 3130-2430-0 IC-NE5532 OPER. AMP PHIL 2 U101, U201 3700-4529-R LED 04mm RED W/STAND 2 LD100, LD200 3700-4530-Y LED 04mm YELLOW W/STAND 2 LD101, LD201 471A-022K-5-N RMF 3W 0.22R 10% RL RGC3 6 R242, R248, R249, R252, R253, R259 471B-120J-1-X RMF 5W 12R 5% AL METAL 2 R261, R262 471B-202J-1-X RMF 5W 2K 5% AL METAL 2 R233, R235 471B-821J-1-X RMF 5W 820R 5% AL METAL 2 R257, R258 4717-103A-2 RMF 1/2W 10K 1% AT 2 R122, R222 4717-9091-2 RMF 1/2W 9.09K 1% AT 1 R123 4718-220J-2-P RMF 1W 22R 5% AT FP 2 R236, R237 4750-6200-0 VR V012CPH, D-SHAFT 10K 2 R112, R212 4756-1016-3-06 SVR H6 100R RH0615C 1 R231 4756-2226-3-06 SVR 2.2K H3 7X7.6 R0615C 2 R239, R240 4718-6R8J-1-X RMF 1W 6.8R 5% AL METAL 3 R20, R246, R247 4719-5R6J-1-X RMF 2W 5.6R 5% AL METAL 1 R260 4804-0040-1 DIODE IN4004 AL 4 D10, D13, D217, D218 4804-9340-2 DIODE IN4934 AT 2 D208, D209 4837-5B10-2 DZ 1/2W 5.5-5.8V AT 2 D207, D210 4838-15V6-2 DZ 1W 15V AT TEMIC 4 D100, D101, D200, D201 4860-5020-5 TR MJE15032 1 Q205

16 QSC Audio Products, Inc.

Channel 2 module (continued)

QSC part # Description Qty. Notes or Component Reference

4860-5030-5 TR MJE15033 1 Q206 4860-5050-5 TR 2SC5200 T0-3P (L) 3 Q208, Q210, Q212 4860-5060-5 TR 2SA1943 T0-3P (L) 3 Q203, Q207, Q209 8910-0062-0 CE 80V 4700U 20% RL 25X 2 C220, C221 8910-0274-0 THERMAL PTC 60C 100 ohm 1 R4 8910-0488-0 ROD THERMISTOR NTC 50ohm 1 R234

Channel 2 SMT parts

150F-104K-6-CF CER2 1206 X7R 50V 100N 3 C100, C102, C104 150F-181K-J-BD CC 50V 180P 10% 0805 4 C101, C103, C201, C203 150F-222K-6-CF CC 50V 2200pF 10% 1206 1 1 C215 150F-560K-J-BD CC 50V 56pF 10% 0805 1.2 2 C110, C210 150H-102J-6-CF CC 100V 0.001µF 5% 1206 1 C214 15CG-560J-6-CF CTC 0/30 56P 5% 1206 2 C111, C211 3131-9730-0 IC NE5517D 1 U10 4720-101J-J RMG 1/10W 100R 5% 0805 6 R109, R110, R127, R209, R211, R227 4720-102J-J RMG 1/10W 1K 5% 0805 3 R102, R126, R202 4720-103A-J RMG 1/10W 10K 1% 0805 8 R100, R101, R105, R106, R200, R201, R205, R206 4720-103J-J RMG 1/10W 10K 5% 0805 3 R103, R203, R228 4720-152J-J RMG 1/10W 1.5K 5% 0805 1 R229 4720-203A-J RMG 1/10W 20K 1% 0805 4 R117, R121, R217, R221 4720-271J-J RMG 1/10W 270R 5% 0805 6 R111, R113, R120, R210, R213, R220 4720-332J-J RMG 1/10W 3.3K 5% 0805 1 R24 4720-393J-J RMG 1/10W 39K 5% 0805 2 R107, R207 4720-470J-J RMG 1/10W 47R 5% 0805 1 R224 4720-472J-J RMG 1/10W 4.7K 5% 0805 2 R114, R214 4720-752J-J RMG 1/10W 7.5K 5% 0805 2 R108, R208 4721-154A-6 RMG 1/8W 150K 1% 1206 4 R118, R119, R218, R219 4721-154J-6 RMG 1/8W 150K 5% 1206 2 R104, R204 4721-333J-6 RMG 1/8W 33K 5% 1206 2 R22, R23 4721-394J-6 RMG 1/8W 390K 5% 1206 2 R116, R216 4721-473J-6 RMG 1/8W 47K 5% 1206 1 R225 4721-821J-6 RMG 1/8W 820R 5% 1206 4 R115, R215, R230, R232 4804-1480-3 DIODE LL4148 SM 15 D102, D103, D105, D106, D202–D206, D211–D216 4853-9060-3 TR 3906 PNP SM 2 Q100, Q200 4860-0640-3 TR 3904 HFE 100-300 SM 2 Q201, Q202

PCB-QZ010C-INP Input board

150F-471J-5-OF CC 50V 470pF 5% RL 8x3.5 4 C1–C4 7010-9860-0 26 PIN IEC RIBBON CABLE 1 J1 2113-1337-1 XLR FEMALE CONN. 2 J101, J201 2113-1652-0 PHONE JACK 06.4 2 J102, J202 2113-1335-0 5 POLE SPEAKER TERMINAL 1 J5 5200-4713-0 10 POLE DIP SWITCH 1 SW1

PCB-QZ010C-OUT Output board

2113-1336-1 SPEAKON NEUTRIK 4 WIRE 2 J100, J200 2113-1338-0 4-POLE SPEAKER TERMINAL 1 J103 4154-2111-0 OUTPUT POST PLUG FOR CE 2 For European models only 4154-2121-0 OUTPUT POST PLUG FOR CE 2 For European models only

RMX Series Technical Service Manual 17

6.2 RMX 1450 Replacement Parts

QSC part # Description Qty. Notes or Component Reference

Misc.

1806-2506-0 POWER TRANSFORMER, 1200 1 2113-1144-0 AC INLET 1 4134-9101-0 METAL WIND GUIDE 1 4154-0361-0 FAN GUIDE 1 5200-4717-0 ROCKER POWER SWITCH 1 5200-3531-0 CIRCUIT BREAKER 15A 1 For 120V models 5200-4731-0 CIRCUIT BREAKER 8A 1 For 230V models 7010-9640-0 AC CORD SET 15A 1 For 120V models 7009-8620-0 POWER CORD SET CE 1 For 230V models 8900-9050-1 DC FAN 24V 80X80 (+5V) 1

PCB-QZ020C-PSU AC Board

153R-224K-5-Y1 CM 250V 0.22uF 10% RL 2 C127, C227 157Q-108M-5-X9E CE 35V 1000UF 20% RL 1 C6 3130-9270-0 IC 4N29 1 U2 4134-8851-0 FUSE HOLDER (DIA.6.3MM 4 REF: F100, F200 4701-202J-C RCF 1/8W 2K 5% ATS 1 R13 4701-474J-C RCF 1/8W 470K 5% ATS 1 R12 4701-682J-C RCF 1/8W 6.8K 5% ATS 2 R9, R14 4719-121J-1-X RMF 2W 120R 5% AL METAL 1 R17 4840-1760-0 DIODE RECT 1A 200V DB103 1 BR1 4840-2150-0 BRIDGE RECTIFIER 400V 2 BR100, BR200 4860-2620-5 TR TIP31C SAMSUNG 1 Q3 5120-0061-0 FUSE T12A/250V 6.3X32MM 2 F100, F200 5400-0831-0 HEATSINK 1 REF: Q3 8910-0273-0 POLYSWITCH 0.15 ohm 1.1A 1 R1 8910-0275-0 THERMAL NTC 30A 1 ohm 1 R21

PCB-QZ020C-PWR1 Channel 1 module (left)

153F-223J-5-LQ CM 50V 0.022UF 5% RL 2 C116, C119 153F-332J-5-KW CM 50V 3300pF 5% RL 6x12 2 C117, C118 153R-683J-5-WWM CM 250V 0.068u 5% RL 1 C124 157F-476M-5-LU CE 50V 47uF 20% RL 1 C8 157R-475M-5-OV CE 250V 4.7u 20% RL 1 C7 1804-1040-0 SPRNG COIL 2uH(14gaWIRE) 1 L100 3700-4531-G LED 04mm GREEN W/STAND 1 LD1 4718-220J-2-P RMF 1W 22R 5% AT FP 2 R136, R137 4718-6R8J-1-X RMF 1W 6.8R 5% AL METAL 2 R146, R147 4719-153J-1-X RMF 2W 15K 5% AL METAL 2 R2, R5 4719-5R6J-1-X RMF 2W 5.6R 5% AL METAL 1 R160 471A-022K-5-N RMF 3W 0.22R 10% RL RGC3 8 R142, R143, R148, R149, R152, R153, R156, R159 471B-102J-1-X RMF 5W 1K 5% AL METAL 2 R157, R158 471B-120J-1-X RMF 5W 12R 5% AL METAL 2 R161, R162 471B-302J-1-X RMF 5W 3K 5% AL METAL 2 R133, R135 4756-1016-3-06 SVR H6 100R RH0615C 1 R131 4756-2226-3-06 SVR 2.2K H3 7X7.6 R0615C 2 R139, R140 4804-0040-1 DIODE IN4004 AL 5 D1, D11, D12, D117, D118 4804-9340-2 DIODE IN4934 AT 2 D108, D109 4837-5B10-2 DZ 1/2W 5.5-5.8V AT 2 D107, D110 4838-15V6-2 DZ 1W 15V AT TEMIC D8, D15 4860-5020-5 TR MJE15032 1 Q105 4860-5030-5 TR MJE15033 1 Q106 4860-5050-5 TR 2SC5200 T0-3P (L) 4 Q104, Q108, Q110, Q112 4860-5060-5 TR 2SA1943 T0-3P (L) 4 Q103, Q107, Q109, Q111 4860-8890-0 TR MPS A06 VCE 80V NS 1 Q5 8910-0272-0 CE 100V 3300u 20% 25X50 4 C120–C123

18 QSC Audio Products, Inc.

Channel 2 module (continued)

QSC part # Description Qty. Notes or Component Reference

8910-0274-0 THERMAL PTC 60C 100 ohm 1 R7 8910-0488-0 ROD THERMISTOR NTC 50ohm 1 R134

Channel 1 SMT parts

150F-222K-6-CF CC 50V 2200pF 10% 1206 1 1 C115 150H-102J-6-CF CC 100V 0.001U 5% 1206 1 C114 4720-103J-J RMG 1/10W 10K 5% 0805 1 R128 4720-152J-J RMG 1/10W 1.5K 5% 0805 1 R129 4720-202J-J RMG 1/10W 2K 5% 0805 1 R8 4720-224J-J RMG 1/10W 220K 5% 0805 1 R26 4720-470J-J RMG 1/10W 47R 5% 0805 2 R25, R124 4721-105J-6 RMG 1/8W 1M 5% 1206 2 R3, R6 4721-154J-6 RMG 1/8W 150K 5% 1206 1 R10 4721-224J-6 RMG 1/8W 220K 5% 1206 2 R18, R27 4721-473J-6 RMG 1/8W 47K 5% 1206 1 R125 4721-474J-6 RMG 1/8W 470K 5% 1206 1 R15 4721-682J-6 RMG 1/8W 6.8K 5% 1206 1 R19 4721-821J-6 RMG 1/8W 820R 5% 1206 2 R130, R132 4804-1480-3 DIODE LL4148 SM 15 D2–D7, D9, D14, D104, D111–D116 4853-9060-3 TR 3906 PNP SM 3 Q4, Q6, Q7 4860-0640-3 TR 3904 HFE 100-300 SM 4 Q8, Q9, Q101, Q102 4860-5110-3 TR KST42 1 Q1

PCB-QZ020C-PWR2 Channel 2 module (right)

153F-154J-5-NLM CM 50V 0.15UF 5% RL 4 C108, C109, C208, C209 153F-223J-5-LQ CM 50V 0.022UF 5% RL 2 C216, C219 153F-224J-5-NLM CM 50V 0.22UF 5% RL 2 C107, C207 153F-332J-5-KW CM 50V 3300pF 5% RL 6x12 2 C217, C218 153R-683J-5-WWM CM 250V 0.068u 5% RL 1 C224 157E-107M-5-KW CE 25V 100uF 20% RL 6x12 2 C105, C205 157E-227M-5-PU CE 25V 220uF 20% RL 4 C112, C113, C212, C213 157F-106M-5-LUN CE 50V 10¦F 20% RL 2 C106, C206 1804-1040-0 SPRNG COIL 2uH(14gaWIRE) 1 L200 2101-1991-0 8 PIN IC SOCKET DIP 2 REF: U101, U201 3130-2430-0 IC-NE5532 OPER. AMP PHIL 2 U101, U201 3700-4529-R LED 04mm RED W/STAND 2 LD100, LD200 3700-4530-Y LED 04mm YELLOW W/STAND 2 LD101, LD201 471A-022K-5-N RMF 3W 0.22R 10% RL RGC3 8 R242, R243, R248, R249, R252, R253, R256, R259 471B-102J-1-X RMF 5W 1K 5% AL METAL 2 R257, R258 471B-120J-1-X RMF 5W 12R 5% AL METAL 2 R261, R262 471B-302J-1-X RMF 5W 3K 5% AL METAL 2 R233, R235 4717-1132-2 RMF 1/2W 11.3K 1% AT 1 R123 4717-1332-2 RMF 1/2W 13.3K 1% AT 2 R122, R222 4718-220J-2-P RMF 1W 22R 5% AT FP 2 R236, R237 4718-6R8J-1-X RMF 1W 6.8R 5% AL METAL 3 R20, R246, R247 4719-5R6J-1-X RMF 2W 5.6R 5% AL METAL 1 R260 4750-6200-0 VR V012CPH, D-SHAFT 10K 2 R112, R212 4756-1016-3-06 SVR H6 100R RH0615C 1 R231 4756-2226-3-06 SVR 2.2K H3 7X7.6 R0615C 2 R239, R240 4804-0040-1 DIODE IN4004 AL 4 D10, D13, D217, D218 4804-9340-2 DIODE IN4934 AT 2 D208, D209 4837-5B10-2 DZ 1/2W 5.5-5.8V AT 2 D207, D210 4838-15V6-2 DZ 1W 15V AT TEMIC 4 D100, D101, D200, D201 4860-5020-5 TR MJE15032 1 Q205 4860-5030-5 TR MJE25033 1 Q206 4860-5050-5 TR 2SC5200 T0-3P (L) 4 Q204, Q208, Q210, Q212 4860-5060-5 TR 2SA1943 T0-3P (L) 4 Q203, Q207, Q209, Q211 8910-0272-0 CE 100V 3300u 20% 25X50 4 C220–C223

RMX Series Technical Service Manual 19

Channel 2 module (continued)

QSC part # Description Qty. Notes or Component Reference

8910-0274-0 THERMAL PTC 60C 100 ohm 1 R4 8910-0488-0 ROD THERMISTOR NTC 50ohm 1 R234

Channel 2 SMT Parts

150F-104K-6-CF CER2 1206 X7R 50V 100N 3 C100, C102, C104 150F-181K-J-BD CC 50V 180P 10% 0805 4 C101, C103, C201, C203 150F-222K-6-CF CC 50V 2200pF 10% 1206 1 1 C215 150F-560K-J-BD CC 50V 56pF 10% 0805 1.2 2 C110, C210 150H-102J-6-CF CC 100V 0.001U 5% 1206 1 C214 15CG-560J-6-CF CTC 0/30 56P 5% 1206 2 C111, C211 3131-9730-0 IC NE5517D 1 U10 4720-101J-J RMG 1/10W 100R 5% 0805 6 R109, R110, R127, R209, R211, R227 4720-102J-J RMG 1/10W 1K 5% 0805 3 R102, R126, R202 4720-103A-J RMG 1/10W 10K 1% 0805 8 R100, R101, R105, R106, R200, R201, R205, R206 4720-103J-J RMG 1/10W 10K 5% 0805 3 R103, R203, R228 4720-152J-J RMG 1/10W 1.5K 5% 0805 1 R229 4720-203A-J RMG 1/10W 20K 1% 0805 4 R117, R121, R217, R221 4720-271J-J RMG 1/10W 270R 5% 0805 6 R111, R113, R120, R210, R213, R220 4720-332J-J RMG 1/10W 3.3K 5% 0805 1 R24 4720-393J-J RMG 1/10W 39K 5% 0805 2 R107, R207 4720-470J-J RMG 1/10W 47R 5% 0805 1 R224 4720-472J-J RMG 1/10W 4.7K 5% 0805 2 R114, R214 4720-752J-J RMG 1/10W 7.5K 5% 0805 2 R108, R208 4721-154A-6 RMG 1/8W 150K 1% 1206 4 R118, R119, R218, R219 4721-154J-6 RMG 1/8W 150K 5% 1206 2 R104, R204 4721-333J-6 RMG 1/8W 33K 5% 1206 2 R22, R23 4721-473J-6 RMG 1/8W 47K 5% 1206 1 R225 4721-4993-6 RMG 1/8W 499K 1% 1206 2 R116, R216 4721-821J-6 RMG 1/8W 820R 5% 1206 4 R115, R215, R230, R232 4804-1480-3 DIODE LL4148 SM 15 D102, D103, D105, D106, D202–D206, D211–D216 4853-9060-3 TR 3906 PNP SM 2 Q100, Q200 4860-0640-3 TR 3904 HFE 100-300 SM 2 Q201, Q202

PCB-QZ020C-INP Input Board

150F-471J-5-OF CC 50V 470pF 5% RL 8x3.5 4 C1, C2, C3, C4 2113-1337-1 XLR FEMALE CONN. 2 J101, J201 2113-1652-0 PHONE JACK 1/4" 6.4 mm 2 J102, J202 5200-4713-0 10 POLE DIP SWITCH 1 SW1 7010-9860-0 26 PIN IEC RIBBON CABLE 1 J1

PCB-QZ020C-OUT Output Board

2113-1336-1 SPEAKON NEUTRIK 4 WIRE 2 J100, J200 2113-1338-0 4-POLE SPEAKER TERMINAL 1 J103 4154-2111-0 OUTPUT POST PLUG FOR CE 2 For European models only 4154-2121-0 OUTPUT POST PLUG FOR CE 2 For European models only

20 QSC Audio Products, Inc.

6.3 RMX 2450 Replacement Parts

QSC part # Description Qty. Notes or Component Reference

Misc.

1806-2507-0 POWER TRANSFORMER, 1800 1 2113-1144-0 AC INLET 1 4134-9101-0 METAL WIND GUIDE 1 4154-0361-0 FAN GUIDE 1 5200-4717-0 ROCKER POWER SWITCH 1 5200-3531-0 CIRCUIT BREAKER 15A 1 For 120V models 5200-4731-0 CIRCUIT BREAKER 8A 1 For 230V models 7010-9640-0 AC CORD SET 15A 1 For 120V models 7009-8620-0 POWER CORD SET CE 1 For 230V models 8900-9050-1 DC FAN 24V 80X80 (+5V) 1

PCB-QZ030C-PSU AC Board

4701-202J-C RCF 1/8W 2K 5% ATS 1 R13 4701-474J-C RCF 1/8W 470K 5% ATS 1 R12 4701-682J-C RCF 1/8W 6.8K 5% ATS 2 R9, R14 153R-224K-5-Y1 CM 250V 0.22uF 10% RL 4 C127, C128, C227, C228 153T-473K-5-WS CM 400V 0.047UF 10% RL 1 C10 157Q-108M-5-X9E CE 35V 1000UF 20% RL 1 C6 3130-9270-0 IC 4N29 1 U2 4719-121J-1-X RMF 2W 120R 5% AL METAL 1 R17 471B-120J-1-X RMF 5W 12R 5% AL METAL 2 R28, R29 4840-1760-0 DIODE RECT 1A 200V DB103 1 BR1 4840-2150-0 BRIDGE RECTIFIER 400V 4 BR100, BR101, BR200, BR201 4860-2620-5 TR TIP31C SAMSUNG 1 Q3 5400-0831-0 HEATSINK 1 REF: Q3 5400-1831-1 HEATSINK FOR RECTIFIER 4 REF: BR100, BR101, BR200, BR201 8910-0273-0 POLYSWITCH 0.15 ohm 1.1A 1 R1 8910-0275-0 THERMAL NTC 30A 1 ohm 1 R21

PCB-QZ030C-PWR2 Channel 1 module (right)

153F-154J-5-NLM CM 50V 0.15UF 5% RL 4 C108, C109, C208, C209 153F-223J-5-LQ CM 50V 0.022UF 5% RL 2 C116, C119 153F-224J-5-NLM CM 50V 0.22UF 5% RL 2 C107, C207 153F-332J-5-KW CM 50V 3300pF 5% RL 6x12 2 C172, C179 153H-102J-5-IQ CM 100V 0.001U 5% RL 5X 2 C131, C231 153R-104J-5-YRM CM 250V 0.1u 5% RL 2 C174, C175 153R-152J-5-XQ CM 250V 0.0015UF 5% RL 1 C114 153R-683J-5-WWM CM 250V 0.068u 5% RL 2 C124, C126 157D-107M-5-OUN CE 16V 100UF 20% RL 8X11 2 C125, C225 157D-476M-5-LUN CE 16V 47u 20% RL 6.5X11 2 C106, C206 157E-107M-5-KW CE 25V 100uF 20% RL 6x12 4 C105, C173, C180, C205 157E-226M-5-IUN CE 25V 22uF 20% RL 5X11 1 C129 157E-227M-5-PU CE 25V 220uF 20% RL 4 C112, C113, C212, C213 157Q-106M-5-IU CE 35V 10uF 20% RL 5x11 1 C171 1804-1040-0 SPRING COIL 2uH (14gaWIRE) 1 L100 2101-1991-0 8 PIN IC SOCKET DIP 2 REF: U101, U201 2101-2081-0 26 PIN DUAL ROW IEC 1 J103 2102-130S-003 13 PIN WAFER P2.0 ST. 1 J104 3130-2430-0 IC-NE5532 OPER. AMP PHIL 2 U101, U201 3700-4529-R LED 04mm RED W/STAND 2 LD100, LD200 3700-4530-Y LED 04mm YELLOW W/STAND 2 LD101, LD201 4134-8851-0 FUSE HOLDER (DIA.6.3MM 2 F100 4715-100J-2 RMF 1/4W 10R 5% AT 1 R163 4715-101J-2 RMF 1/4W 100R 5% AT 1 R164 4717-2322-2 RMF 1/2W 23.2K 1% AT 3 R122, R123, R222 4718-123J-2-X RMF 1W 12K 5% AT METAL 2 R177, R194

RMX Series Technical Service Manual 21

Channel 1 module (continued)

QSC part # Description Qty. Notes or Component Reference

4718-153J-2-X RMF 1W 15K 5% AT METAL 1 R165 4718-220J-2-P RMF 1W 22R 5% AT FP 2 R136, R137 4718-3R3J-1-X RMF 1W 3.3R 5% AL 3 R146, R147, R20 4719-1R5J-1-X RMF 2W 1R5 5% AL METAL 2 R181, R182 4719-5R6J-1-X RMF 2W 5.6R 5% AL METAL 1 R160 471A-022K-5-N RMF 3W 0.22R 10% RL RGC3 8 R142, R143, R148, R149, R152, R153, R156, R159 471B-120J-1-X RMF 5W 12R 5% AL METAL 4 R154, R155, R161, R162 471B-222J-1-X RMF 5W 2.2K 5% AL METAL 3 R157, R158, R198 471B-512J-1-X RMF 5W 5.1K 5% AL METAL 2 R180, R188 471B-822J-1-X RMF 5W 8.2K 5% AL METAL 4 R118, R119, R133, R135 4750-6200-0 VR V012CPH, D-SHAFT 10K 2 R112, R212 4756-1016-3-06 SVR H6 100R RH0615C 1 R131 4756-2226-3-06 SVR 2.2K H3 7X7.6 R0615C 2 R139, R140 4804-0040-1 DIODE IN4004 AL 4 D10, D12, D117, D118 4804-9340-2 DIODE IN4934 AT 2 D108, D109 4837-3B20-2 DZ 1/2W 3.8-4.0V AT 1 D170 4837-5B10-2 DZ 1/2W 5.5-5.8V AT 2 D107, D110 4838-10V6-2 DZ 1.3W 10V AT TEMIC 1 D174 4838-12V6-2 DZ 1W 12V AT TEMIC 1 D178 4838-15V6-2 DZ 1W 15V AT TEMIC 4 D100, D101, D200, D201 4840-2190-0 DIODE MUR1520 15A 200V 2 D175, D176 4860-5020-5 TR MJE15032 1 Q105 4860-5030-5 TR MJE15033 1 Q106 4860-5050-5 TR 2SC5200 T0-3P (L) 4 Q104, Q108, Q110, Q112 4860-5060-5 TR 2SA1943 T0-3P (L) 4 Q103, Q107, Q109, Q111 4860-5250-5 TR 2N5064 TRIODE 2 D119, D120 490F-Z440-5 FET IRFZ44 TO-220 60V 2 Q170, Q174 5120-0501-0 FUSE T25A/125V 6.4X32MM 1 F100 8910-0274-0 THERMAL PTC 60C 100 ohm 1 R4 8910-0482-0 TRIAC 600V 40A MAC224A8 1 Q113 8910-0488-0 ROD THERMISTOR NTC 50ohm 1 R134 8910-0494-0 CE 63V 12000uF 20% RL 4 C120–C123

Channel 1 SMT parts

150F-101J-J-BD CC 50V 100pF 5% 0805 1.2 1 C130 150F-101K-J-BD CC 50V 100P 10% 0805 1 C132 150F-103M-J-BD CC 50V 0.01uF 20% 0805 1 1 C181 150F-104M-6-CF CC 50V 0.1uF 20% 1206 1. 2 C104, C178 150F-181K-J-BD CC 50V 180P 10% 0805 4 C101, C103, C201, C203 150F-222K-6-CF CC 50V 2200pF 10% 1206 1 1 C115 150F-470J-J-BD CC 50V 47pF 5% 0805 1.2x 5 C110, C170, C176, C177, C210 15CG-270J-6-CF CTC 0/30 27P 5% 1206 2 C111, C211 3130-9240-0 IC LM311M VOLTAGE 2 U170, U171 3131-9730-0 IC NE5517D 1 U10 4720-101J-J RMG 1/10W 100R 5% 0805 6 R109, R110, R127, R209, R210, R227 4720-102J-J RMG 1/10W 1K 5% 0805 3 R102, R126, R202 4720-103A-J RMG 1/10W 10K 1% 0805 8 R100, R101, R105, R106, R200, R201, R205, R206 4720-103J-J RMG 1/10W 10K 5% 0805 3 R103, R128, R203 4720-123J-J RMG 1/10W 12K 5% 0805 1 R176 4720-152J-J RMG 1/10W 1.5K 5% 0805 1 R129 4720-202J-J RMG 1/10W 2K 5% 0805 2 R190, R195 4720-222J-J RMG 1/10W 2.2K 5% 0805 1 R191 4720-243J-J RMG 1/10W 24K 5% 0805 4 R117, R121, R217, R221 4720-271J-J RMG 1/10W 270R 5% 0805 4 R113, R196, R213, R296 4720-3011-J RMG 1/10W 3.01K 1% 0805 2 R24, R175 4720-391J-J RMG 1/10W 390R 5% 0805 2 R120, R220 4720-393J-J RMG 1/10W 39K 5% 0805 2 R107, R207 4720-470J-J RMG 1/10W 47R 5% 0805 2 R170, R189

22 QSC Audio Products, Inc.

Channel 1 module (continued)

QSC part # Description Qty. Notes or Component Reference

4720-472J-J RMG 1/10W 4.7K 5% 0805 8 R114, R138, R174, R179, R187, R193, R214, R238 4720-473J-J RMG 1/10W 47K 5% 0805 1 R183 4720-474J-J RMG 1/10W 470K 5% 0805 2 R172, R185 4720-592A-J RMG 1/10W 5.9K 1% 0805 2 R171, R184 4720-750J-J RMG 1/10W 75R 5% 0805 1 R124 4720-752J-J RMG 1/10W 7.5K 5% 0805 2 R108, R208 4720-821J-J RMG 1/10W 820R 5% 0805 2 R111, R211 4721-101J-6 RMG 1/8W 100R 5% 1206 1 R197 4721-154J-6 RMG 1/8W 150K 5% 1206 6 R104, R173, R178, R186, R192, R204 4721-4643-6 RMG 1/8W 464K 1% 1206 3 R166, R167, R266 4721-473J-6 RMG 1/8W 47K 5% 1206 1 R125 4721-683A-6 RMG 1/8W 68K 1% 1206 4 R22A, R22B, R23A, R23B 4721-821J-6 RMG 1/8W 820R 5% 1206 4 R115, R130, R132, R215 4721-824J-6 RMG 1/8W 820K 5% 1206 2 R116, R216 4804-1480-3 DIODE LL4148 SM 18 D102–D106, D111–D116, D171, D173, D177, D202, D203, D205, D206 4853-9060-3 TR 3906 PNP SM 4 Q100, Q172, Q175, Q200 4860-0640-3 TR 3904 HFE 100-300 SM 4 Q101, Q102, Q171, Q173

PCB-QZ030C-PWR1 Channel 2 module (left)

153F-223J-5-LQ CM 50V 0.022UF 5% RL 2 C216, C219 153F-332J-5-KW CM 50V 3300pF 5% RL 6x12 2 C272, C279 153R-104J-5-YRM CM 250V 0.1u 5% RL 2 C274, C275 153R-152J-5-XQ CM 250V 0.0015UF 5% RL 1 C214 153R-683J-5-WWM CM 250V 0.068u 5% RL 2 C224, C226 157E-107M-5-KW CE 25V 100uF 20% RL 6x12 2 C273, C280 157E-226M-5-IUN CE 25V 22uF 20% RL 5X11 1 C229 157F-476M-5-LU CE 50V 47uF 20% RL 1 C8 157Q-106M-5-IU CE 35V 10uF 20% RL 5x11 1 C271 157R-475M-5-OV CE 250V 4.7u 20% RL 1 C7 1804-1040-0 SPRNG COIL 2uH(14gaWIRE) 1 L200 2102-031S-004 3 PIN ST. WAFER 1 J257 2102-130S-003 13 PIN WAFER P2.0 ST. 1 J204 3700-4531-G LED 04mm GREEN W/STAND 1 LD1 4134-8851-0 FUSE HOLDER (DIA.6.3MM 2 REF: F200 4715-100J-2 RMF 1/4W 10R 5% AT 1 R263 4715-101J-2 RMF 1/4W 100R 5% AT 1 R264 4718-123J-2-X RMF 1W 12K 5% AT METAL 2 R277, R294 4718-153J-2-X RMF 1W 15K 5% AT METAL 1 R265 4718-220J-2-P RMF 1W 22R 5% AT FP 2 R236, R237 4718-3R3J-1-X RMF 1W 3.3R 5% AL 2 R246, R247 4719-1R5J-1-X RMF 2W 1R5 5% AL METAL 2 R281, R282 4719-333J-2-X RMF 2W 33K 5% AT METAL 2 R2, R5 4719-5R6J-1-X RMF 2W 5.6R 5% AL METAL 1 R260 471A-022K-5-N RMF 3W 0.22R 10% RL RGC3 8 R242, R243, R248, R249, R252, R253, R256, R259 471B-120J-1-X RMF 5W 12R 5% AL METAL 4 R254, R255, R261, R262 471B-222J-1-X RMF 5W 2.2K 5% AL METAL 3 R257, R258, R298 471B-512J-1-X RMF 5W 5.1K 5% AL METAL 2 R280, R288 471B-822J-1-X RMF 5W 8.2K 5% AL METAL 4 R218, R219, R233, R235 4756-1016-3-06 SVR H6 100R RH0615C 1 R231 4756-2226-3-06 SVR 2.2K H3 7X7.6 R0615C 2 R239, R240 4804-0040-1 DIODE IN4004 AL 5 D1, D11, D13, D217, D218 4804-9340-2 DIODE IN4934 AT 2 D208, D209 4837-3B20-2 DZ 1/2W 3.8-4.0V AT 1 D270 4837-5B10-2 DZ 1/2W 5.5-5.8V AT 2 D207, D210 4838-10V6-2 DZ 1.3W 10V AT TEMIC 1 D274 4838-12V6-2 DZ 1W 12V AT TEMIC 1 D278 4838-15V6-2 DZ 1W 15V AT TEMIC 2 D8, D15 4840-2190-0 DIODE MUR1520 15A 200V 2 D275, D276

RMX Series Technical Service Manual 23

Channel 2 module (continued)

QSC part # Description Qty. Notes or Component Reference

4860-5020-5 TR MJE15032 1 Q205 4860-5030-5 TR MJE15033 1 Q206 4860-5050-5 TR 2SC5200 T0-3P (L) 4 Q204, Q208, Q210, Q212 4860-5060-5 TR 2SA1943 T0-3P (L) 4 Q203, Q207, Q209, Q211 4860-5250-5 TR 2N5064 TRIODE 2 D219, D220 4860-8890-0 TR MPS A06 VCE 80V NS 1 Q5 490F-Z440-5 FET IRFZ44 TO-220 60V 2 Q270, Q274 5120-0501-0 FUSE T25A/125V 6.4X32MM 1 F200 8910-0274-0 THERMAL PTC 60C 100 ohm 1 R7 8910-0482-0 TRIAC 600V 40A MAC224A8 1 Q213 8910-0488-0 ROD THERMISTOR NTC 50ohm 1 R234 8910-0494-0 CE 63V 12000uF 20% RL 4 C220–C223

Channel 2 SMT Parts

150F-101K-J-BD CC 50V 100P 10% 0805 1 C9 150F-103M-J-BD CC 50V 0.01uF 20% 0805 1 1 C281 150F-104M-6-CF CC 50V 0.1uF 20% 1206 1. 1 C278 150F-104M-J-BD CC 50V 0.1uF 20% 0805 1. 1 C11 150F-222K-6-CF CC 50V 2200pF 10% 1206 1 1 C215 150F-470J-J-BD CC 50V 47pF 5% 0805 1.2x 3 C270, C276, C277 3130-9240-0 IC LM311M VOLTAGE 2 U270, U271 4720-103J-J RMG 1/10W 10K 5% 0805 1 R228 4720-123J-J RMG 1/10W 12K 5% 0805 1 R276 4720-152J-J RMG 1/10W 1.5K 5% 0805 1 R229 4720-202J-J RMG 1/10W 2K 5% 0805 3 R8, R290, R295 4720-222J-J RMG 1/10W 2.2K 5% 0805 1 R291 4720-3011-J RMG 1/10W 3.01K 1% 0805 1 R275 4720-470J-J RMG 1/10W 47R 5% 0805 3 R25, R270, R289 4720-472J-J RMG 1/10W 4.7K 5% 0805 4 R274, R279, R287, R293 4720-473J-J RMG 1/10W 47K 5% 0805 1 R283 4720-474J-J RMG 1/10W 470K 5% 0805 2 R272, R285 4720-592A-J RMG 1/10W 5.9K 1% 0805 2 R271, R284 4720-750J-J RMG 1/10W 75R 5% 0805 1 R224 4721-101J-6 RMG 1/8W 100R 5% 1206 1 R30 4721-105J-6 RMG 1/8W 1M 5% 1206 2 R3, R6 4721-154J-6 RMG 1/8W 150K 5% 1206 5 R10, R273, R278, R286, R292 4721-224J-6 RMG 1/8W 220K 5% 1206 2 R18, R26 4721-334J-6 RMG 1/8W 330K 5% 1206 1 R27 4721-4643-6 RMG 1/8W 464K 1% 1206 1 R15 4721-473J-6 RMG 1/8W 47K 5% 1206 1 R225 4721-682J-6 RMG 1/8W 6.8K 5% 1206 1 R19 4721-821J-6 RMG 1/8W 820R 5% 1206 2 R230, R232 4804-1480-3 DIODE LL4148 SM 18 D2–D7, D9, D14, D204, D211–D216, D271, D273, D277 4853-9060-3 TR 3906 PNP SM 5 Q4, Q6, Q7, Q272, Q275 4860-0640-3 TR 3904 HFE 100-300 SM 6 Q8, Q9, Q201, Q202, Q271, Q273 4860-5110-3 TR KST42 1 Q1

PCB-QZ030C-INP Input Board

150F-471J-5-OF CC 50V 470pF 5% RL 8x3.5 4 C1, C2, C3, C4 2113-1337-1 XLR FEMALE CONN. 2 J101, J201 2113-1652-0 PHONE JACK 1/4" 6.4 mm 2 J102, J202 5200-4713-0 10 POLE DIP SWITCH 1 SW1 7010-9860-0 26 PIN IEC RIBBON CABLE 1 J1

PCB-QZ030C-OUT Output Board

2113-1336-1 SPEAKON NEUTRIK 4 WIRE 2 J100, J200 2113-1338-0 4-POLE SPEAKER TERMINAL 1 J103 4154-2111-0 OUTPUT POST PLUG FOR CE 2 For European models only 4154-2121-0 OUTPUT POST PLUG FOR CE 2 For European models only

24 QSC Audio Products, Inc.

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.

87654321

7. Schematics and diagrams

00

SCREW 4 REQD

REV

AXX

REVISIONS

EFF DATE CHK APPROVED DATEDESCRIPTION

RMX 850: PCB-QZ010C-PSU

D

RMX 850: PCB-QZ010C-INP

INPUT PCB

00

RMX 1450: PCB-QZ020C-PSU RMX 2450: PCB-QZ030C-PSU

PWR PCB

00

SCREW 8 REQD

D

RMX 1450: PCB-QZ020C-INP RMX 2450: PCB-QZ030C-INP

WASHER

FAN

00

C

CHASSIS

00

HEX NUT

FLAT WASHER

00

TOROID

SWITCH

C

00

SCREW

00

2 REQD

SCREW 4 REQD

HEX NUT

2 REQD

B

A

00

SCREW 4 REQD

00

FAN GUARD

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

SCREW

00

PWR CONNECTOR

00

SCREW 2 REQD

00

SCREW 2 REQD

00

7.1 RMX Assembly/Disassembly Diagram 1 of 2

(All models)

OUTPUT PCB

00

RMX 850: PCB-QZ010C-OUT RMX 1450: PCB-QZ020C-OUT RMX 2450: PCB-QZ030C-OUT

NEXT ASSY USED ON

X RMX 2450

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

RACK EAR

2 REQD

DRAWN

MILA P. 12-07-2000

CHECKED

ISSUED

00

PARTS LIST

DATEAPPROVALS

D

SCALE

AUDIO PRODUCTS, INC.

COSTA MESA,CALIFORNIA

CHASSIS ASSY

RMX 2450

DWG NO.

PA-002450-00

1/2

SHEET

1 OF 2

B

DWG NO.

PA-002450-00

SH

1

REV

A

REV

RMX Series Technical Service Manual 25

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.

87654321

CHANNEL MODULES

RMX 850: PCB-QZ010C-PWR1 (left or Channel 1) RMX 1450: PCB-QZ020C-PWR1 (left or Channel 1) RMX 2450: PCB-QZ030C-PWR1 (left or Channel 2)

D

CHANNEL MODULES

SCREW 5 REQD

SCREW 6 REQD

D

RMX 850: PCB-QZ010C-PWR2 (right or Channel 2) RMX 1450: PCB-QZ020C-PWR2 (right or Channel 2) RMX 2450: PCB-QZ030C-PWR2 (right or Channel 1)

C

B

DWG NO.

PA-002450-00

KNOB

2 REQD

CHASSIS

NUT

SCREW

A

4 REQD

WIRE ASSY

SH

2

REV

A

7.2 RMX Assembly/Disassembly Diagram 2 of 2

(All models)

87654321

D

SCALE

1/2

DWG NO.

PA-002450-00

SHEET

26 QSC Audio Products, Inc.

REV

2 OF 2

THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION WHICH IS THE PROPERTY OF QSC AUDIO PRODUCTS, THAT MAYNOT BE DISCLOSED, REPRODUCED OR USED WITHOUT EXPRESS WRITTEN CONSENT FROM

QSC AUDIO PRODUCTS.

8

7

6

5

4

3

2

REV

1

PROTOTYPE RELEASE

2

CLEAN UP BY AA3

DESCRIPTION

REVISION

3-01-00

3-10-00

1

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

4

Q101

R127

3904

1N4148

D104

P1

7

R130

^R_1206

D105

1N4148

D106

1N4148

100

^R_0805

R128

10K

^R_0805

820

J104:7

J204:7

P1

R129

1.5K

^R_0805

Q102

3904

D107

5.6V-.25W

R131

BIAS

R135

2.0K-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

SIGCH1

6

D108

1N4934

C115

0.0022u, 10%

D109

1N4934

CW

W

100

C116 .022

CCW

D110

5.6V-.25W

820

R132

^R_1206

D111

1N4148

R133

2.0K-5W

+67V

0.22-3W

P1

4700-80V

R157

820-5W

R158

820-5W

4700-80V

0.22-3W

+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

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%

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-SIG A)

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-LIM A

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

+IN A

J1:3

3

-IN A

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 TO GND 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

C105

A1

R108

39K

^R_0805

R109

100-25V

C100

0.1-50V 10% ^C_1206

ROUTE THIS GROUND TO "A" GND AT JI-2 INPUT CABLE

A1 P1

C106

10-50NP

CW

R112

10K

CCW

A1

10K LINEAR 3B RIGHT ANGLE POT

7.50K ^R_0805

^R_0805

100

R110

A1

^R_0805

P1

R111

R20

6.8-1W

CHANNEL 1 GAIN

R113

W

270

^R_0805

R114

^R_0805

270

A1

ROUTE THIS GROUND TO "P" GND AT HEATSINK COMMON BETWEEN CH A AND CH B

12

NC

12

NC

13

NC

13

C107

.22-5%

C108

.15-5%

4.7K ^R_0805

A1

Q100

3906

J104:10

J204:10

R126

1K

^R_0805

J204:12

J104:12

J104:13

J204:13

R116

R117

390K

.15-5%

20.0K

+VCC_A

10

TH_A

SEE SH 3

SP_A

MODEL R116 700 383K 1200 499K

^R_1206

C109

^R_0805

A1

R121

R115

820

^R_1206

R118

R119

R120

270

^R_0805

150K

^C_0805

20.0K

^R_1206

C110

56p

6

5

^R_0805

-15V_A

56p-200V-COG

10.0K-1%-1/2W

R123

9.09K-1%-1/2W

-

+

C111

^C_1206

R122

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 RMX 850 Schematic Diagram 1 of 3

Channel 1

7

6

5

4

WP-000850-00 RMX850

NEXT ASSY USED ON

APPLICATION

3

ITEM NO.QTY PART NO.

UNLESS OTHERWISE SPECIFIED

DIMENSIONS ARE IN INCHES.

DIMENSIONS PER ANSI Y14.5-1982

TOLERANCES ARE:

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.

COSTA MESA, 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 27

THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION WHICH IS THE PROPERTY OF QSC AUDIO PRODUCTS, THAT MAYNOT 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

P1

C214

R224

P1

CLIP CH 2

R226

^R_1206

0.001u, 100V 5%

47

LD200

RED

47K

^C_1206

^R_0805

D202

1N4148

D203

1N4148

A1

10.0K

^R_0805

NE5532

R200

+IN_B

10.0K

^R_0805

SEE SH 1

R201

-IN_B

10.0K

^R_0805

C

SEE SH 1

F_30_B

F_SND_B

F_BYP_B

9

10

^R_0805

U10:2

LM13600M

12

16

R202

R203

B

SEE SH 1

CLIP_B

SW-GND FOR CLIP LIM

SEE SH 1

BR MONO RETURN -- CAUTION, SENSITIVE NODE

BR_RET

R204

1K

10.0K

150K

SEE SH 3

^R_0805

^R_1206

-14V

U201:1

+

3

1

-

2

R206

10.0K

^R_0805

C203

180p-5%

^C_0805

C206

10-50NP

R212

10K

10K LINEAR 3B RIGHT ANGLE POT

CW

R213

W

270

^R_0805

CCW

A1

R216

390K

^R_1206

C207

.22-5%

+15V_B

C212

220-25V

D201

15V-1W

C210

56p

^C_0805

^R_0805

R215

820

R217

^R_1206

20.0K

C209

.15-5%

^R_0805

+VCC_B

-VCC_B

A1

R218

R219

R221

150K

R220

^R_0805

^R_1206

270

20.0K ^R_0805

8

6

-

5

+

4

-15V_B

C211

56p-200V-COG

^C_1206

R222

10.0K-1%-1/2W

U201:2

NE5532

D200

15V-1W

220-25V

7

C213

3906

Q200

R214

C208

.15-5%

4.75K

A1

SEE SH 3

+14V

R208

7.50K ^R_0805

R207

39K

^R_0805

14

+

15

13

-

^R_0805

100

R211

C205

100-25V

R210

270

^R_0805

R209

^R_0805

A1

Q201

R227

3904

D204

1N4148

P1

100

^R_0805

D205

1N4148

D206

1N4148

^R_0805

R228

R229

10K

1.5K

^R_0805

Q202

P1

3904

R230

D208

D209

CW

R231

100

BIAS

CCW

R232

820

D207

5.6V-.25W

1N4934

W

C216 .022

D210

5.6V-.25W

820

D212

YELLOW

^R_1206

C215

^R_1206

1N4148

LD201

SIGCH2

0.0022u, 10%

R235

2.0K-5W

^C_1206

R234

50

NTC

R236

22-1W

R239

2.2K

R240

2.2K

+67V

R242

0.22-3W

R248

0.22-3W

R252

0.22-3W

FP

Q203

2SA1943

Q207 2SA1943

Q209 2SA1943

P1

D216

1N4148

4700-80V

R257

C219

P1

.022

820-5W

R258

820-5W

D215

4700-80V

1N4148

CW

CCW

CW

1N4148

D213

W

D214

NEG CURRENT LIMIT

POS CURRENT LIMIT

C217

.0033

C218

.0033

Q205

MJE15032

R246

6.8-1W

R247

6.8-1W

Q206 MJE15033

1N4148

Q204

2SC5200

Q208

2SC5200

Q210

2SC5200

D211

R233

2.0K-5W

1N4148

R237

22-1W

FP

R243

0.22-3W

R249

0.22-3W

R253

0.22-3W

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.

SH-000850-00

SH

2

REV

3

A

Gray shading indicates signal path

7.4 RMX 850 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

28 QSC Audio Products, Inc.

REV

3

OF

32

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

C

IEC AC INLET

B

8 67 5

RECTIFIERS BR100, 200 AND C127–227 ARE LOCATED OFF THE MAIN PCB, MOUNTED

AC VOLTAGE PROGRAMMING TERMINALS

AC INPUT,HIGH (ALL)

100V 120V 240V

TRANSFORMER PRI LEADS

BRN

GRY

BLK

BLU BLU

-

--

WHT

RED

BLU

BLK

RED

WHT

AC INPUT,LOW (ALL)

!

CIRCUIT BREAKER USA: 10A-125V EUROPE: 5A-250V

1

LINE

2

NEUT

3

GND

BRN

-

BLK

GRY

RED

-

WHT

!

JSW

JP12

TO POWER SWITCH

JP10

!

R21

1 OHM 30A

QUICK CONNECT PC-MTD TABS

J2A

J3A

J4A

J5A

J6A

J7A

J8A

J9A

20 VAC TO FANPOWER RECTIFIER

U-I CORE POWER TRANSFORMER NOTE SPLIT SECONDARY WIRING FROM EACH LEG TO EACH CHANNEL

120V

BRN

20V

BLU

0V

BLK

COIL ONE

COIL TWO

120V

GRY

20V

RED

0V

WHT

TO CHASSIS.

E1

E2

E3

E4

E5

E6

E7

E8

F100

10A-125V

F200

10A-125V

C127

0.22-200V

C227

0.22-200V

MAINTAIN FULL PRI-SEC CREEPAGE

J21:3

3

BR100

3

400V-25A

AC2

1

4

+

-

AC1

2

BR200

2

400V-25A

AC1

1

4

+

-

AC2

3

E13

E14

E15

E16

R1

1.1 AMP

J157:3

3

E9

E10

E11

E12

+VCC_A

-VCC_A

+VCC_B

-VCC_B

1

BR1

+

200V-1A

3

4

AC2

AC1

-

2

C6

1000-35V

D1

1N4004

LD1 GRN

PILOT LED

R2

15K-2W

R3

1.0M

^R_1206

D2

1N4148

8

R4

60C 100 OHM

ATTACHTO HS-2

SEE SH 1

28V PRI-SIDE DC FAN SUPPLY

ATTACHTO HS-1

TH_A

9

MUTING AND THERMAL PROTECTION.

R27

220K

^R_1206

D15

^R_1206

R5

15K-2W

D3

1N4148

60C 100 OHM

J204:9

J104:9

R6

1.0M

J104:8

J204:8

R7

1N4148

D5

1N4148

15V

R26

220K

^R_0805

2500V HI-POT

J21:1

J157:1

1

Q1

300V-.2A

R8

2.0K ^R_0805

J157:2

2

J21:2

2

!

1

5

4

263

1

D4

D7

D6

R10

150K

^R_1206

C7

4.7-250V

MAINTAIN FULL PRI-SEC CREEPAGE

U2

4N29

R12

470K

^R_1206

R15

470K

P1

D14

1N4148

C8 47-50V

R9

R13

+14V

1N4004

D12

1N4004

D11

1N4004

D10

1N4004

+

-

D13

2

J104:1

J204:1

+15V_B

J204:2

J104:2

-15V_B

C11

.1-5OV

+15V_A

-15V_A

BR_CUT

R25

47

^R_0805

3904

3906

Q8

Q6

J104:3

3

J204:3

3

BR_CUT

Q9

3904

P1

Q7

3906

D8

15V

6.81K ^R_1206

2.0K ^R_0805

1N4148

R14

R18

220K

^R_1206

P1

Q4

3906

R19

D9

P1

6.81K ^R_1206

Q3

TIP31C

6.8K

R17

120-2W

^R_1206

-14V

Q5

MPSW05

1

J18:1

1

TO DC FAN

J18:2

2

D1432

C

B

DWGNO.

SH-000850-00

SH

3

REV

3

A

7.5 RMX 850 Schematic Diagram 3 of 3

SIZE FSCM NO. DWG NO.

D

SCALE CADFILE NO. SHEET

NONE

PLOT DATE: Thu Sep 07, 2000

SH-000850-00

RMX850-3.sch

1

NOTES: UNLESS OTHERWISE SPECIFIED

8

Power Supply

7

6

5

4

3

2

RMX Series Technical Service Manual 29

REV

3

OF

33

THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION WHICH IS THE PROPERTY OF QSC AUDIO PRODUCTS, THAT MAYNOT 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

C114

R124

R125

47K

^R_1206

0.001u, 100V 5%

47

1N4148

LD100

RED

CLIP CH 1

J104:4

^C_1206

^R_0805

D102

D103

4

R127

Q101 3904

D104

1N4148

7

P1

R130

^R_1206

D105

1N4148

D106

1N4148

100

^R_0805

R128

10K

^R_0805

820

J104:7

J204:7

P1

R129

1.5K

^R_0805

Q102

3904

D107

5.6V-.25W

R131

BIAS

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

1N4934

C115

0.0022u, 10%

D109

1N4934

CW

W

100

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

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%

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-SIG A)

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-LIM A

FILT-CAPA

FILT-SENDA

FILT-BYPA

FILTBYP B

FILTCAP B

CLIP LIM B

-IN B

+IN B

J1:1

J203:1

1

GND

2

+IN A

3

-IN A

470p 5%

^C_1206

4

470p 5%

^C_1206

5

6

GND

7

8

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

1

J1:2

J203:2

2

J1:3

J203:3

3

J1:4

J203:4

4

J1:5

J203:5

5

J1:6

J203:6

6

J1:7

J203:7

7

J1:8

J203:8

8

J1:9

J203:9

9

J203:10

10

J203:11

BR MONO FEED

11

J203:12

12

J203:13

BR_RET

13

J203:14

14

J203:15

15

J203:16

16

J203:17

17

J203:18

18

J203:19

19

J203:20

20

J203:21

21

J203:22

22

J203:23

23

J203:24

24

J203:25

25

J203:26

26

A1

FILT-CAPA

FILT-SENDA

FILT-BYPA

SW TO GND FOR CLIP LIM

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

8

^U_LM13600

P1

7

R107

1

C105

A1

R108

39K

^R_0805

R109

100-25V

C100

0.1-50V 10% ^C_1206

ROUTE THIS GROUND TO "A" GND AT JI-2 INPUT CABLE

C106

10-50NP

CW

R112

10K

CCW

A1

10K LINEAR 3B RIGHT ANGLE POT

7.50K ^R_0805

^R_0805

100

R110

A1

^R_0805

P1

^R_0805

R111

270

R20

6.8-1W

CHANNEL 1 GAIN

R113

W

270

^R_0805

R114

A1

ROUTE THIS GROUND TO "P" GND AT HEATSINK COMMON BETWEEN CH A AND CH B

12

P1A1

NC

12

NC

13

NC

13

C107

.22-5%

C108

.15-5%

4.7K ^R_0805

A1

Q100

3906

J104:10

J204:10

R126

1K

^R_0805

J204:12

J104:12

J104:13

J204:13

R116

R117

+VCC_A

500K

.15-5%

20.0K

10

TH_A

SEE SH 3

^R_1206

C109

^R_0805

A1

SP_A

MODEL R116 700 383K 1200 499K

R121

R115

^R_1206

R118

R119

^R_0805

820

R120

270

150K

^C_0805

20.0K

^R_1206

C110

56p

^R_0805

-15V_A

56p-200V-COG

13.3K-1%-1/2W

R123

11.3K-1%-1/2W

6

-

5

+

^C_1206

C111

R122

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 RMX 1450 Schematic Diagram 1 of 3

Channel 1

7

6

5

4

NEXT ASSY USED ON

RMX 1450WP-001451-00

APPLICATION

3

ITEM NO.QTY PART NO.

UNLESS OTHERWISE SPECIFIED

DIMENSIONS ARE IN INCHES.

DIMENSIONS PER ANSI Y14.5-1982

TOLERANCES ARE:

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.

COSTA MESA, 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

30 QSC Audio Products, Inc.

THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION WHICH IS THE PROPERTY OF QSC AUDIO PRODUCTS, THAT MAYNOT 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

NE5532

1K

10.0K

150K

SEE SH 3

^R_0805

^R_1206

-14V

U201:1

+

3

1

-

2

R206

10.0K

^R_0805

C203

180p-5%

^C_0805

C206

10-50NP

R212

10K

10K LINEAR 3B RIGHT ANGLE POT

CW

R213

W

270

^R_0805

CCW

A1

R216

500K

^R_1206

C207

.22-5%

+15V_B

C212

220-25V

D201

15V-1W

P1

C210

56p

C209

.15-5%

^R_0805

+VCC_B

-VCC_B

A1

R218

R219

R221

150K

^R_1206

150K

^R_1206

R220

270

^R_0805

20.0K

^C_0805

^R_0805

8

6

-

5

+

4

-15V_B

C211

56p-200V-COG

^C_1206

R222

13.3K-1%-1/2W

U201:2

NE5532

D200

15V-1W

220-25V

7

P1

C213

CLIP CH 2

3906

Q200

R214

C208

.15-5%

R217

^R_0805

R215

820

20.0K

^R_1206

4.75K

A1

SEESH3

+14V

R208

7.50K ^R_0805

R207

39K

^R_0805

14

+

15

13

-

^R_0805

100

R211

C205

100-25V

R210

270

^R_0805

R209

^R_0805

A1

10

^R_0805

U10:2

LM13600M

12

16

R202

R200

+IN_B

10.0K

^R_0805

SEE SH 1

R201

-IN_B

10.0K

^R_0805

C

SEE SH 1

F_30_B

F_SND_B

F_BYP_B

9

R203

B

SEE SH 1

CLIP_B

SW-GND FOR CLIP LIM

SEE SH 1

BR MONO RETURN -- CAUTION, SENSITIVE NODE

BR_RET

R204

C214

R224

^R_1206

0.001u, 100V 5%

47

LD200

RED

R226

47K

^R_0805

D202

1N4148

D203

1N4148

^C_1206

Q201

R227

3904

D204

1N4148

100

P1

^R_0805

D205

1N4148

D206

1N4148

^R_0805

R228

R229

1.5K

10K

^R_0805

Q202

P1

3904

R230

D208

D209

CW

R231

100

BIAS

CCW

R232

820

^R_1206

D207

5.6V-.25W

1N4934

C215

1N4934

W

C216 .022

D210

5.6V-.25W

820

^R_1206

D212

1N4148

LD201

YELLOW

SIG CH 2

0.0022u, 10%

R235

3.0K-5W

^C_1206

R234

50

NTC

R236

22-1W

R239

R240

+78V

R242

0.22-3W

R248

0.22-3W

R252

0.22-3W

FP

Q203 2SA1943

Q207 2SA1943

Q209 2SA1943

Q211

2SA1943

P1

D216

Q205

MJE15032

D213

C217

1N4148

.0033

CW

W

NEG

2.2K

CURRENT LIMIT

CCW

POS CURRENT

2.2K

LIMIT

W

C218

CW

.0033

D214

1N4148

R246

6.8-1W

R247

6.8-1W

Q206 MJE15033

1N4148

3300-100V

R257

C219

P1

.022

1.0K-5W

R258

1.0K-5W

D215

3300-100V

1N4148

Q204

2SC5200

Q208

2SC5200

Q210

2SC5200

Q212

2SC5200

D211

R233

3.0K-5W

1N4148

R237 22-1W

FP

R243

0.22-3W

R249

0.22-3W

R253

0.22-3W

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

SH-001451-00

SH

2

REV

4

A

Gray shading indicates signal path

A

7.7 RMX 1450 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 31

OF

23

REV

4

THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION WHICH IS THE PROPERTY OF QSC AUDIO PRODUCTS, THAT MAYNOT BE DISCLOSED, REPRODUCED OR USED WITHOUT EXPRESS WRITTEN CONSENT FROM QSC AUDIO PRODUCTS.

D

C

IEC AC INLET

B

8 67 5

RECTIFIERS BR100, 200 AND C127-227 ARE LOCATED OFF THE MAIN PCB, MOUNTED TO CHASSIS.

E1

E2

E3

E4

E5

E6

E7

E8

!

F100

12A-125V

!

F200

12A-125V

C127

0.22-200V

C227

0.22-200V

MAINTAIN FULL PRI-SEC CREEPAGE

J21:3

3

BR100

3

400V-25A

AC2

1

4

+

-

AC1

2

BR200

2

400V-25A

AC1

1

4

-

+

AC2

3

AC VOLTAGE PROGRAMMING TERMINALS

AC INPUT,HIGH (ALL)

100V 120V 240V

TRANSFORMER PRI LEADS

BRN

GRY

BLU BLU

-

--

RED

BLK

WHT

BRN

BLK

GRY

RED

WHT

BRN

GRY

BLK

-

WHT

BLU

RED

AC INPUT,LOW (ALL)

!

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

1

LINE

2

NEUT

3

GND

-

JSW

TO POWER SWITCH

!

R21

1 OHM 30A

!

JP12

JP10

U-I CORE POWER TRANSFORMER NOTE SPLIT SECONDARY WIRING FROM EACH LEG TO EACH CHANNEL

BRN

QUICK CONNECT PC-MTD TABS

BLU

J2A

BLK

J3A

J4A

J5A

GRY

J6A

J7A

RED

WHT

J8A

J9A

20 VAC TO FANPOWER RECTIFIER

!

120V

20V

0V

COIL ONE

COIL TWO

120V

20V

0V

E13

E14

E15

E16

R1

1.1 AMP

J157:3

3

E9

+VCC_A

E10

-VCC_A

E11

+VCC_B

1N4004

R2

15K-2W

1.0M

^R_1206

D1

LD1 GRN

PILOT LED

R3

E12

-VCC_B

MUTING AND THERMAL PROTECTION.

^R_1206

R27

220K

^R_1206

D15

^R_1206

R5

15K-2W

1.0M

R6

1N4148

D5

1N4148

15V

D4

Q1

300V-.2A

C7

4.7-250V

R26

220K

^R_0805

D7

MAINTAIN FULL

R8

PRI-SEC CREEPAGE

2.0K ^R_0805

150K

+14V

D12

1N4004

D11

1N4004

D10

1N4004

D13

1N4004

2

J104:1

J204:1

+15V_B

J204:2

J104:2

-15V_B

C11

.1-5OV

+15V_A

-15V_A

BR_CUT

R25

47

^R_0805

3904

3906

Q8

J104:3

3

J204:3

3

BR_CUT

Q6

Q9

3904

P1

Q7

3906

1N4148

R15

470K

^R_1206

D8

15V

C8 47-50V

P1

D14

R18

220K

^R_1206

3906

P1

Q4

R19

6.81K ^R_1206

Q5

MPSW05

1

D9

1N4148

P1

-14V

R10

1N4148

D6

1N4148

8

60C 100 OHM

ATTACHTO HS-1

9

D3

J104:8

J204:8

R7

J204:9

J104:9

1N4148

2500V HI-POT

D2

1N4148

R4

60C 100 OHM

ATTACHTO HS-2

TH_A

1

BR1

+

200V-1A

3

4

AC2

AC1

-

2

C6

1000-35V

SEE SH 1

28V PRI-SIDE DC FAN SUPPLY

J157:2

2

J21:2

2

!

1

5

U2

4

263

4N29

R12

J21:1

1

J157:1

1

470K

^R_1206

R9

R13

6.81K

2.0K

^R_1206

^R_0805

R14

6.81K ^R_1206

Q3

TIP31C

R17

120-2W

J18:1

1

TO DC FAN

J18:2

2

+

-

D1432

C

B

DWGNO.

SH-001451-00

SH

3

REV

4

A

7.8 RMX 1450 Schematic Diagram 3 of 3

SIZE FSCM NO. DWG NO.

D

SCALE CADFILE NO. SHEET

NONE

PLOT DATE: Thu Sep 07, 2000

SH-001451-00

RMX1450-4.sch

1

NOTES: UNLESS OTHERWISE SPECIFIED

8

Power Supply

7

6

5

4

3

2

32 QSC Audio Products, Inc.

OF

33

REV

4

THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION WHICH IS THE PROPERTY OF QSC AUDIO PRODUCTS, THAT MAYNOT 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

1+

1-

R24

3.01K

^R_0805

D

MT2

Q113

MAC224

MT1

C

BR-POS

2+

2-

SPEAKON

BR-NEG

B

P1

DWGNO.

SH-002451-00

SH

2

REV

4

C173 100-25V

P1

1N4148

R156

0.22-3W

R159

0.22-3W

100-25V

Q170

RFZ44

^D_SOT-23

TO -VMED

R181

1.5-2W

D117

1N4004

D118

1N4004

R182

1.5-2W

C180

2

P1

MUR1520

R188

D178

R180

5.1K-5W

D175

MUR1520

D176

5.1K-5W

C120

12000-63V

C174

0.1-250V

C121

12000-63V

SEE SH 3

CT_A

C122

12000-63V

C175

.1-250V

C123

12000-63V

12V-1W-1N4742A

F100

25A-125V

+110_A

+55_A

R165

15K-1W

R160

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

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%

LM13600M

A1

U10:1

5

R102

1K

^R_0805

P1

1

R103

-14V

10.0K ^R_0805

^C_0805

C103

180p-5%

^C_0805

C102

.1-50V-10%

^C_1206

11

+

-

6

3

2

R104

^R_0805

NE5532

U101:1

+

-

^R_0805

+14V

3

2

4

C104

150K

J1:1

J2:1

1

GND

J1:2

2

+IN A

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-SIG A)

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-LIM A

FILT-CAPA

FILT-SENDA

FILT-BYPA

FILTBYP B

FILTCAP B

CLIP LIM B

-IN B

+IN B

J1:3

3

-IN A

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

FILT-CAPA

FILT-SENDA

SW TO GND FOR CLIP LIM

BR MONO FEED

BR_RET

C132 47P-50V ^C_1206

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

FILT-BYPA

R100

10.0K

^R_0805

R101

10.0K

^R_0805

8

R197

100

^R_0805

7

R105

10.0K

R106

10.0K

.1-50V-10%

^R_1206

1

R107

C105

39K

^C_1206

ROUTE THIS GROUND TO "A" GND AT JI-2 INPUT CABLE

A1

10K LINEAR 3B RIGHT ANGLE POT

R108

7.50K

^R_0805

100

R109

100-25V

C106

47-10NP

R112

10K

^R_0805

R111

820

^R_0805

CW

CCW

100

R110

A1

R20

3.3-1W

A1 P1

R_RES1W

CHANNEL 1 GAIN

R113

W

274

^R_0805

A1

270

R196

^R_0805

C131

.001-5%

R114

A1

^R_0805

Q100

3906

^Q_BJTP_SOT-23

ROUTE THIS GROUND TO "P" GND AT HEATSINK COMMON BETWEEN CH A AND CH B

C107

.22-5%

C108

.15-5%

4.7K ^R_0805

A1

R115

A1

^R_0805

SPEAKER BUS -- BEFORE FUSE

27p-200V-COG

820K

R116

^R_1206

C109

.15-5%

24K

R117

^R_0805

820

^R_1206

C125

100-16NP

R138

4.7K

^R_0805

R126

1K

R166

464K

^R_1206

C111

^C_1206

R121

R120

^R_0805

24K

390

5

6

5

^R_0805

23.2K-1%-1/2W

R123

23.2K-1%-1/2W

R167

464K

^R_1206

R122

4

C172

.0033

R190

2.00K

^R_0805

+15V_A

220-25V

D101

15V-1W

C110

27p

^C_0805

8

-

7

+

U101:2

4

NE5532

D100

15V-1W

C113

-15V_A

R173

150K

^R_1206

R177

12K-1W

R178

150K

^R_1206

^Q_BJTN_SOT-23

R125

47K

^R_1206

C114

C112

0.0015u, 250V

P1

75

R124

1N4148

^D_SOT-23

1N4148

^D_SOT-23

LD100

RED

220-25V

CLIP CH 1

SPEAKER BUS -- AFTER FUSE

R194

12K-1W

R195

2.00K

^R_0805

C179

.0033

^C_1206

^R_0805

D102

D103

Q101 3904

D104

1N4148

^D_SOT-23

100

R127

P1

R174

4.7K

^R_0805

R179

4.7K

^R_0805

D105

1N4148

D106

1N4148

^R_0805

R186

150K

^R_1206

R192

150K

^R_1206

.36W at full clip

R128

10K

P1

^Q_BJTN_SOT-23

POS STEP DRIVER

3.9V

D170

R172

470K

^R_0805

1

2

3

4

D174

10V-1N4740A

R129

1.5K

^R_0805

C181

D112

0.01

Q102

3904

R130

820

^R_1206

D107

5.6V-.25W

D108

1N4934

C115

D109

1N4934

CW

R131

W

100

C116

BIAS

.022

CCW

D110

5.6V-.25W

820

R132

^R_1206

D111

1N4148

^D_SOT-23

R183

47K

^R_0805

R185

470K

R187

^R_0805

4.7K

^R_0805

R193

4.7K

^R_0805

R171

U170

8

^U_LM311

GND

V+

7

6

BAL/STR

^LM311-SMT

^D_SOT-23

LD101

^C_1206

0.0022u, 10%

R134

50

NTC

R133

8.2K-5W

R135

8.2K-5W

R118

8.2K-5W

R119

8.2K-5W

5

BAL

+110_A

R136

22-1W

1N4148

^D_SOT-23

R139

2.2K

R140

2.2K

1N4148

^D_SOT-23

R137

22-1W

FP

-110_A

V-

1N4148

YELLOW

SIG CH 1

C176

47pF-50V-5%

^C_0805

U171

1

GND

2

3

4

V-

^U_LM311

^LM311-SMT

BAL/STR

8

V+

C178

7

6

5

BAL

NEG STEP DRIVER

5.90K

R175

3.01K

^R_0805

FP

CW

CCW

CW

^R_0805

D113

W

NEG CURRENT LIMIT

POS CURRENT LIMIT

W

D114

R184

^C_1206

.1-50V-10%

D171

1N4148

^D_SOT-23

Q103 2SA1943

Q104

2SC5200

5.90K

1N4148

^D_SOT-23

^R_0805

3

^Q_BJTP_SOT-23

R142

R_RES1W

R143

^R_0805

D177

R191

2.2K

^Q_BJTN_SOT-23

Q171

3904

Q172

3906

0.22-3W

Q107

2SA1943

Q105

MJE15032

R146

3.3-1W

R147

3.3-1W

Q106 MJE15033

Q108

2SC5200

0.22-3W

Q173

3904

Q175

3906

C170

47pF-50V-5%

^C_0805

10-35V

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

12K

0.22-3W

Q111 2SA1943

2.2K-5W

2SC5200

0.22-3W

R170

47

^R_0805

R198

R157

R158

Q112

Q174

RFZ44

D173

A

7.9 RMX 2450 Schematic Diagram 1 of 3

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

RMX Series Technical Service Manual 33

REV

4

OF

42

THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION WHICH IS THE PROPERTY OF QSC AUDIO PRODUCTS, THAT MAYNOT 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

SEE SH 1

-IN_B

SEE SH 1

F_30_B

F_BYP_B

SEE SH 1

CLIP_B

SEE SH 1

BR_RET

R200

10.0K

^R_0805

R201

10.0K

^R_0805

9

C201

180p-5%

^C_0805

R202

3

1K

^R_0805

2

SW-30 HZ

SW-FILTBYPASS

U10:2

LM13600M

10

-14V

+

12

16

-

R203

10.0K ^R_0805

150K

R204

C205

^R_1206

SW-GND FOR CLIP LIM

BR MONO RETURN -- CAUTION, SENSITIVE NODE

C272

.0033

R290

CHANNEL-2

2.00K

^R_0805

12K-1W

5

J204:5

5

J104:5

R205

A1

10.0K

^R_0805

NE5532

U201:1

+

1

-

R206

10.0K

^R_0805

C204

180p-5%

^C_0805

C206

47-10NP

R212

10K

10K LINEAR 3B RIGHT ANGLE POT

J204:10

J104:10

CW

R213

W

274

^R_0805

CCW

A1

.22-5%

C207

SPEAKER BUS -- BEFORE FUSE

10

27p-200V-COG

820K

R216

^R_1206

R266

464K

^R_1206

C211

^C_1206

+15V_B

LD201

YELLOW

6

C212

220-25V

D201

15V-1W

J204:6

J104:6

C210

27p

-15V_B

^C_0805

8

6

-

7

5

+

U201:2

4

NE5532

D200

15V-1W

C213

220-25V

4

^R_0805

R214

A1

R215

4.7K

C208

.15-5%

^R_0805

.001

^R_0805

R210

C231

270

R296

A1

100

^R_0805

A1

+14V-A

R208

7.50K

R207

39K

^R_0805

14

15

13

100

R209

820

^R_1206

R217

24K

C209

.15-5%

^R_0805

R221

24K

^R_0805

R211

820K

^R_0805

100-25V

4-5 MA CHARGE CURRENT 1 MA DISCHARGE.

Q200

3906

^Q_BJTP_SOT-23

A1

C225

100-16NP

R238

4.7K

^R_0805

R220

390

^R_0805

R222

23.21K-1%-1/2W

R277

J104:4

J204:4

P1

^R_0805

C_MYL2_AI

R295

2.00K

C279

.0033

C214

^R_0805

LD200

RED

CLIP CH 2

R273

150K

^R_1206

R278

150K

^R_1206

Q201

3904

^Q_BJTN_SOT-23

R225

4.7K

^R_1206

1N4148

^D_SOT-23

^C_1206

0.0015u, 250V 5%

R224

75

D202

1N4148

^D_SOT-23

D203

1N4148

^D_SOT-23

R227

R294

12K-1W

D204

R274

4.7K

^R_0805

R279

4.7K

^R_0805

7

^D_SOT-23

100

P1

R228

10K

^R_0805

D205

1N4148

D206

1N4148

^R_0805

R_RES1W

^R_1206

R286

150K

R292

150K

POS STEP DRIVER

3.9V

D270

R272

^R_0805

D274

10V-1N4740A

R229

1.5K ^D_SOT-23

^R_0805

C281

0.01

Q202 3904

R231

BIAS

100

^R_0805

^Q_BJTN_SOT-23

R230

D208

1N4934

D209

1N4934

CW

W

C216 .022

CCW

R232

D211

1N4148

R283

47K

R287

4.7K

^R_0805

R293

4.7K

^R_0805

820

D207

5.6V-.25W

D210

5.6V-.25W

820

^D_SOT-23

P1

J204:7

J104:7

R271

470K

U270

1

2

3

4

D212

1N4148

GND

V-

^LM311-SMT

BAL/STR

R218

8.2K-5W

R219

8

V+

7

6

5

BAL

8.2K-5W

FP

SIG CH 2

^R_1206

^D_SOT-23

C215

0.0022u, 10%

^C_1206

R234

50

NTC

R239

R240

2.2K

^D_SOT-23

^R_1206

R233

8.2K-5W

22-1W

R235

8.2K-5W

-110_B

C276

47pF-50V-5%

^C_0805

R285

470K

^R_0805

U271

1

GND

V-

^LM311-SMT

BAL/STR

V+

BAL

2

3

4

NEG STEP DRIVER

+110_B

R236

22-1W

1N4148

R237

FP

8

7

6

5

5.90K

R275

3.01K

^R_0805

FP

CW

CCW

CW

^R_0805

D213

W

NEG CURRENT LIMIT

POS CURRENT LIMIT

W

D214

C278

D271

1N4148

^D_SOT-23

Q203 2SA1943

Q204

2SC5200

R284

^C_1206

.1-50V-10%

^Q_BJTP_SOT-23

R242

R246

3.3-1W

R247

3.3-1W

R243

5.90K ^R_0805

D277

1N4148

^D_SOT-23

R291

2.2K

^R_0805

^Q_BJTN_SOT-23

Q271 3904

Q272

3906

0.22-3W

Q207

2SA1943

Q205

MJE15032

R_RES1W

Q206 MJE15033

Q208

2SC5200

0.22-3W

Q273

3904

Q275 3906

47pF-50V-5%

R248

0.22-3W

Q209 2SA1943

^D_SOT-23

P1

^D_SOT-23

2SC5200

R249

0.22-3W

^Q_BJTN_SOT-23

^Q_BJTP_SOT-23

C270

^C_0805

10-35V

D216

1N4148

C219

.022

D215

1N4148

Q210

C277

47pF-50V-5%

^C_0805

^R_0805

C271

R289

R276

47

R252

R253

12K

0.22-3W

Q211 2SA1943

2SC5200

0.22-3W

R270

^R_0805

R298

2.2K-5W

R257

2.2K-5W

R258

2.2K-5W

Q212

47

D273

C273 100-25V

P1

Q274

RFZ44

1N4148

R256

R259

0.22-3W

Q270

RFZ44

^D_SOT-23

TO -VMED

D217

1N4004

D218

1N4004

P1

R282

1.5-2W

R288

100-25V

R281

1.5-2W

MUR1520

5.1K-5W

C280

R280

5.1K-5W

D275

MUR1520

D276

12000-63V

C274

.1-250V

12000-63V

SEE SH 3

CT_B

12000-63V

C275

.1-250V

12000-63V

D278

12V-1W-1N4742A

C220

C221

C222

C223

+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 +

J203 -

22-25NP

WIRES TO SPEAKER OUTPUT PCB

R262

12-5W

R255

12-5W

2N5064

R263

10-1/4W

R264

100-1/4W

CHANNEL 2

SPEAKER OUTPUT

1+

J200

1-

SPEAKER CONNECTORS ON BREAKAWAYPCB FROM SHEET ONE

1432

D

MT2

G

Q213

MAC224

MT1

C

P1

BR-POS

TO CH 1 SHEET 1

2+

2-

SPEAKON

BR-NEG

B

DWGNO.

SH-002451-00

SH

3

REV

4

A

7.10 RMX 2450 Schematic Diagram 2 of 3

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

34 QSC Audio Products, Inc.

REV

4

OF

43

D

THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION WHICH IS THE PROPERTY OF QSC AUDIO PRODUCTS, THAT MAYNOT BE DISCLOSED, REPRODUCED OR USED WITHOUT EXPRESS WRITTEN CONSENT FROM QSC AUDIO PRODUCTS.

AC VOLTAGE PROGRAMMING TERMINALS

C

B

AC INPUT,HIGH (ALL)

100V 120V 240V

TRANSFORMER PRI LEADS

BRN

GRY

BLK

-

--

WHT

BLU

RED

AC INPUT,LOW (ALL)

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

IEC AC INLET

LINE

NEUT

GND

BRN

GRY

-

RED

BLK

WHT

1

2

3

8 67 5

RECTIFIER BR100-201 CIRCUIT

BRN

-

BLUBLU

BLK

GRY

RED

-

WHT

!

JP12

JSW

TO POWER SWITCH

JP10

!

R21

1 OHM 30A

QUICK CONNECT PC-MTD TABS

J4A

J5A

J6A

J8A

J9A

J7A

J2A

J3A

20 VAC TO FANPOWER RECTIFIER

U-I CORE POWER TRANSFORMER NOTE SPLIT SECONDARY WIRING 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

E6

E7

E8

E9

E10

E11

E12

IS DRAWN FOR CHASSIS MTG OF RECTIFIERS. E-POINTS ARE WIRE CONNECTIONS.

0.22-250V

3

AC2

1

+

C128

0.22-250V

C228

0.22-250V

AC1

400V-25A

2

BR201

2

400V-25A

AC1

1

+

AC2

3

C127

4

-

BR101

4

-

0.22-250V

MAINTAIN FULL PRI-SEC CREEPAGE

BR100 400V-25A

1

+

1

+

C227

R1

1.1 AMP

R29

12-5W

E112

E13

E114

E14

3

AC2

AC1

AC2

2

BR200

2

3

4

-

400V-25A

4

-

E113

E15

E115

E16

E212

E17

E214

E18

E213

E19

E215

E20

C10

0.047-400V

R28

12-5W

1

BR1

+

200V-1A

3

4

AC1

AC2

-

2

C6

1000-35V

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

D7

R8

D6

2500V HI-POT

J21:3

J157:3

3

2.0K

J157:2

2

!

^R_0805

J21:2

1

263

MAINTAIN FULL PRI-SEC CREEPAGE

D1432

J104:12

J104:2

J204:2

+15_B

C11

.1-5OV

13

12

J204:12

+15V_A

^Q_BJTN_SOT-23

P1

3906

^Q_BJTP_SOT-23

-15V_A

J204:13

J104:13

Q9

3904

Q7

R25

47

^R_0805

Q8

3904

^Q_BJTN_SOT-23

Q6

3906

^Q_BJTP_SOT-23

BR_CUT

A1

3

C9 100pF ^C_1206

R30

100 ^R_0805

J204:3

J104:3

BR_CUT-A

C

B

DWGNO.

+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

+

-

-15V_B

-15V_A

1N4148

^D_SOT-23

R15

464K

^R_1206

R12

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

3906

R14

P1

Q4

R19

6.8K ^R_1206

P1

6.81K ^R_1206

Q3

TIP31C

R17

120-2W

R10

150K

^R_1206

C7

4.7-250V

5

U2

4

4N29

SH-002451-00

SH

4

REV

4

A

7.11 RMX 2450 Schematic Diagram 3 of 3

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

RMX Series Technical Service Manual 35

REV

4

OF

44

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

36 QSC Audio Products, Inc.

SCALE

NONE

SHEET

7.12 RMX 850 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

GRN •

BRN

AC POWER CORD

A

HOT GND NEUT

BRN GRN BLU

CIRCUIT-

BREAKER

AC POWER

SWITCH

BRNBRN

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

RMX Series Technical Service Manual 37

SCALE

NONE

SHEET

7.13 RMX 1450 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

INPUT PCB

1724-342A-0102

CIRCUITBREAKER

26

TRANSFORMER

1806-2507-0

RED

RED(2)

AC POWER

SWITCH

RED 5

RED 4

BLK 3

BLK 2

BLK 1

RED 5

RED 4

BLK 3

BLK 2

BLK 1

1 2 3

WIRE ASSY

FAN ASSY

12

E112

E114

E113

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

BRN

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

7.14 RMX 2450 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

DWG NO.

SH-0025000

SH

1

REV

A

REV

A

38 QSC Audio Products, Inc.

“QSC” and the QSC logo are registered trademarks of QSC Audio Products, Inc. 1675 MacArthur Blvd. Costa Mesa, CA 92626

(800) 772-2834 FAX (714)754-6173

www.qscaudio.com

QSC RMX-2450 Service manual

Specifications and Main Features

Frequently Asked Questions

User Manual