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RMX Series Technical Service Manual (2RU models)

1

TD-000098-00 rev. C

QSC Audio Products, LLC

Technical Services Group

Phone:

1-800 QSC AUDIO (1-800-772-2834) USA only
+1 (714) 957-7150

Fax:

+1 (714) 754-6173

Postal:

1665 MacArthur Blvd.
Costa Mesa, California 92626 USA

E-mail:

[email protected]

Web:

http://www.qscaudio.com (product information and support)
http://www.qscstore.com (parts and accessory sales)

RMX 850

RMX 1450

RMX 1850HD

RMX 2450

RMX Series

Technical Service Manual

Copyright 2001, 2002, 2005, 2008 QSC Audio Products, LLC All rights reserved.

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

Summary of Contents for RMX Series

Page 1: ...Technical Service Manual RMX Series 2RU models RMX 850 RMX 1450 RMX 1850HD RMX 2450 TD 000098 00 TD 000098 00 Rev C QSC Audio Products LLC Costa Mesa CA 92626 USA www qscaudio com...

Page 2: ......

Page 3: ...73 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...

Page 4: ...UIT TYPE AB AB H H AB Class AB B complementary linear output H Class AB B complementary linear output with Class H 2 step high efficiency circuit DIMENSIONS 19 0 48 3 cm wide 3 5 8 9 cm tall 2 rack sp...

Page 5: ...ting positive and negative current limits 16 5 Servicing RMX amplifiers 18 5 1 Mechanical disassembly and re assembly 18 6 Replacement parts 19 6 1 RMX850 Replacement Parts 19 6 2 RMX1450 Replacement...

Page 6: ...f 4 Power Supply 46 7 15 RMX 2450 Schematic Diagram 4 of 4 Power Supply Revision 47 7 16 RMX Power Transformer Configurations March 2007 and later 48 7 17 RMX 850 Chassis Wiring Diagram 49 7 18 RMX 14...

Page 7: ...as lead which may be present in electronic components solder and other parts RoHS compliant materials When servicing RoHS compliant amplifiers it is important for the service technician to use only R...

Page 8: ...ropriate 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 s...

Page 9: ...ls 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 deli...

Page 10: ...n 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 balan...

Page 11: ...ip 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 emit...

Page 12: ...oltage 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_M...

Page 13: ...OUTPUT A BUFFER INPUT A BUFFER OUTPUT A NE5532AN Dual operational amplifier part number IC 000211 GP was 3130 2430 0 LM311 Voltage comparator part number IC 000214 GP was 3130 9240 0 NE5517D Dual oper...

Page 14: ...0261 GP replaces discontinued MAC224 Triac A1 A2 G Note To install the BTA41 Triac on a channel module circuit board that originally held a MAC224 Triac first mount it to an adapter QSC part number SR...

Page 15: ...ns 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 i...

Page 16: ...57 R258 R298 RMX1850HD and RMX2450 only D215 and D216 Channel 2 RMX850 and RMX1450 Check R118 and R119 Channel 1 or R218 and R219 Channel 2 R130 or R132 Channel 1 or R230 or R232 Channel 2 is open Exc...

Page 17: ...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 Excess...

Page 18: ...positive and negative current limiting instructions for the procedure follow below 4 RMX calibration procedures 4 2 Setting positive and negative current limits Tools and resources you will need Oscil...

Page 19: ...l 1 R139 R140 Channel 2 R239 R240 3 75 4 5 A 4 5 5 5 A 4 5 5 5 A 5 5 6 5 A Clipping voltage into 2 ohms RMS Channel 1 Adjust R139 for symmetry Channel 2 Adjust R239 for symmetry 26 29 V 33 5 37 5 V 42...

Page 20: ...uick connect tabs that are disconnected by pulling them straight up No unsoldering is necessary 5 Servicing RMX amplifiers 9 Slide the channel modules toward the back so the potentiom eter shafts and...

Page 21: ...8910 0273 0 POLYSWITCH 1 1A 0 15 OHM 1 5W 1 R1 RE 000270 GP 8910 0275 0 THERMAL NTC 30A 1 OHM 1 R21 RE 012004 GP 4719 121J 1 X RMF 2W 120 OHM 5 1 R17 RE 120003 GP 4701 202J C RCF 1 8W 2K 5 ATS 1 R13 R...

Page 22: ...0V FILM DIPPED 1 C224 CA 415004 GP 153F 154J 5 NLM 0 15UF 5 50V CM RBT 7 5X 4 C108 C109 C208 C209 CA 422006 GP 153F 224J 5 NLM CM 50V 0 22UF 5 RL 2 C107 C207 CA 610020 GP 157F 106M 5 LUN CE 50V 10UF 2...

Page 23: ...1 10W 1K 5 0805 3 R102 R126 R202 RE 115004 GP 4720 152J J RMG 1 10W 1 5K 5 0805 1 R229 RE 133007 GP 4720 332J J RMG 1 10W 3 3K 5 0805 1 R24 RE 147001 GP 4720 472J J RMG 1 10W 4 7K 5 0805 2 R114 R214...

Page 24: ...1 R13 RE 168002 GP 4701 682J C RCF 1 8W 6 8K 5 ATS 2 R9 R14 4701 474J C RCF 1 8W 470K 5 ATS 1 R12 WP 014502 00 Channel 1 Module Assembly left was PCB QZ020C PWR1 CA 233004 GP 153F 332J 5 KW CM 50V 00...

Page 25: ...20 RL 2 C105 C205 CA 722006 GP 157E 227M 5 PU CE 25V 220uF 20 RL 4 C112 C113 C212 C213 CA 833002 GP 8910 0272 0 3300UF 20 100V ELECT RAD 4 C220 C223 CO 000222 GP 2101 1991 0 8 PIN IC SOCKET 2 REF U101...

Page 26: ...E 147001 GP 4720 472J J RMG 1 10W 4 7K 5 0805 2 R114 R214 RE 175003 GP 4720 752J J RMG 1 10W 7 5K 5 0805 2 R108 R208 RE 210006 GP 4720 103J J RMG 1 10W 10K 5 0805 3 R103 R203 R228 RE 210007 GP 4720 10...

Page 27: ...L OXIDE FILM 2 R28 R29 RE 012004 GP 4719 121J 1 X RMF 2W 120 OHM 5 1 R17 RE 120003 GP 4701 202J C RCF 1 8W 2K 5 ATS 1 R13 RE 168002 GP 4701 682J C RCF 1 8W 6 8K 5 ATS 2 R9 R14 4701 474J C RCF 1 8W 470...

Page 28: ...226 3 06 SVR 2 2K H3 7X7 2 R139 R140 RE 122008 GP 471B 222J 1 X RMF 5W 2 2K 5 METAL 3 R157 R158 R198 RE 151003 GP 471B 512J 1 X RMF 5W 5 1K 5 AL METAL 2 R180 R188 RE 182002 GP 471B 822J 1 X RMF 5W 8 2...

Page 29: ...2 C273 C280 CA 547008 GP 157R 475M 5 OV 4 7UF 20 250V ELECTRO RAD 1 C7 CA 912001 GP 8910 0494 0 12000UF 20 PCNT 63V CE RL 4 C220 C223 CO 000214 GP 2102 031S 004 CONN 3 PIN STRAIGHT WAFER 1 J257 CO 000...

Page 30: ...W 820 OHM 5 1206 2 R230 R232 RE 115004 GP 4720 152J J RMG 1 10W 1 5K 5 0805 1 R229 RE 120004 GP 4720 202J J RMG 1 10W 2K 1 0805 3 R8 R290 R295 RE 122007 GP 4720 222J J RMG 1 10W 2 2K 5 0805 1 R291 RE...

Page 31: ...1 8W 2K 5 ATS 1 R13 RE 168002 GP 4701 682J C RCF 1 8W 6 8K 5 ATS 2 R9 R14 RE 210006 GP 4720 103J J RMG 1 10W 10K 5 0805 4 R31 R34 January 2002 and later 4701 474J C RCF 1 8W 470K 5 ATS 1 R12 WP 002454...

Page 32: ...0 RE 122008 GP 471B 222J 1 X RMF 5W 2 2K 5 METAL 3 R157 R158 R198 RE 151003 GP 471B 512J 1 X RMF 5W 5 1K 5 AL METAL 2 R180 R188 RE 182002 GP 471B 822J 1 X RMF 5W 8 2K 5 AL METAL 4 R118 R119 R133 R135...

Page 33: ...9 GP 157E 107M 5 KW CE 25V 100UF 20 RL 2 C273 C280 CA 912001 GP 8910 0494 0 12000UF 20 PCNT 63V CE RL 4 C220 C223 CO 000214 GP 2102 031S 004 CONN 3 PIN STRAIGHT WAFER 1 J257 CO 000217 GP 2102 130S 003...

Page 34: ...0 5110 3 TR KST42 1 Q1 RE 004702 GP 4720 470J J RMG 1 10W 47 OHM 5 0805 3 R25 R270 R289 RE 007506 GP 4720 750J J RMG 1 10W 75 OHM 5 0805 1 R224 RE 082003 GP 4721 821J 6 RMG 1 8W 820 OHM 5 1206 2 R230...

Page 35: ...CIMALS DECIMALS ANGLES xx 02 xxx 010 1 2 DEBURR EDGES XXX R MAX TOROID SWITCH SCREW PWR CONNECTOR SCREW 2 REQD NOTES UNLESS OTHERWISE SPECIFIED THIS DRAWING USED IN CONJUNCTION WITH SCHEMATIC DWGs MAI...

Page 36: ...OM QSC AUDIO PRODUCTS 7 2 RMX Assembly Disassembly Diagram 2 of 2 All models CHANNEL MODULES RMX 850 WP 008503 00 was PCB QZ010C PWR1 left or Channel 1 RMX 1450 WP 014502 00 was PCB QZ020C PWR1 left o...

Page 37: ...5 C_1206 CLIP LIM A S T R J202 CH1_ IN RING TIP C1 470p 5 C_1206 C3 470p 5 C_1206 CH1_ IN 5 J5 5 4 J5 4 1 3 2 J101 S T R J102 R102 1K R_0805 GND IN A IN A 1 J1 1 2 J1 2 3 J1 3 R100 10 0K R_0805 R101 1...

Page 38: ...5 6 7 NE5532 U201 2 P1 LD200 RED CLIP CH 2 R227 R_0805 D210 C216 022 CW CCW W R231 100 BIAS D200 15V 1W C213 220 25V P1 D202 1N4148 D205 1N4148 D206 1N4148 D203 1N4148 R232 820 R_1206 1N4148 D211 R233...

Page 39: ...RMX Series Technical Service Manual 2RU models 37 TD 000098 00 rev C 7 5 RMX850 Schematic Diagram 3 of 3 Power Supply...

Page 40: ...1 C4 470p 5 C_1206 C2 470p 5 C_1206 CLIP LIM A S T R J202 C3 470p 5 C_1206 C1 470p 5 C_1206 TIP RING CH1_ IN CH1_ IN 5 J5 5 4 J5 4 1 3 2 J101 S T R J102 R102 1K R_0805 GND IN A IN A 1 J1 1 2 J1 2 3 J...

Page 41: ...C216 022 CW CCW W R231 100 BIAS D200 15V 1W C213 220 25V P1 D202 1N4148 D205 1N4148 D206 1N4148 D203 1N4148 R232 820 R_1206 R233 3 0K 5W 1N4148 D211 3 2 1 NE5532 U201 1 C206 C203 180p 5 C_0805 C201 18...

Page 42: ...40 QSC Audio Products LLC 7 8 RMX1450 Schematic Diagram 3 of 3 Power Supply...

Page 43: ...RMX Series Technical Service Manual 2RU models 41 TD 000098 00 rev C Gray shading indicates signal path 7 9 RMX1850HD Schematic Diagram 1 of 3 Channel 1...

Page 44: ...42 QSC Audio Products LLC Gray shading indicates signal path 7 10 RMX1850HD Schematic Diagram 2 of 3 Channel 2...

Page 45: ...RMX Series Technical Service Manual 2RU models 43 TD 000098 00 rev C 7 11 RMX1850HD Schematic Diagram 3 of 3 Power Supply...

Page 46: ...2 5 CW CCW W R112 see below R113 274 R_0805 R106 10 0K R_0805 R116 R_1206 R196 270 R_0805 14V ROUTE THIS GROUND TO P GND AT HEAT SINK COMMON BETWEEN CH A AND CH B ROUTE THIS GROUND TO A GND AT JI 2 IN...

Page 47: ..._0805 R202 1K R_0805 F_BYP_B SW 30 HZ SW FILT BYPASS F_30_B F_BYP_B IN_B IN_B SEE SH 1 SEE SH 1 CHANNEL 2 POS STEP DRIVER R273 150K R_1206 R271 5 90K R_0805 R274 4 7K R_0805 R272 470K R_0805 D270 3 9V...

Page 48: ...PC MTD TABS U I CORE POWER TRANSFORMER NOTE SPLIT SECONDARY WIRING FROM EACH LEG TO EACH CHANNEL E3 E6 E4 BLU 2 AC1 1 4 3 AC2 BR100 400V 25A 0 22 250V C128 2 AC1 1 4 3 AC2 BR101 400V 25A C127 0 22 25...

Page 49: ...RMX Series Technical Service Manual 2RU models 47 TD 000098 00 rev C 7 15 RMX2450 Schematic Diagram 4 of 4 Power Supply Revision...

Page 50: ...48 QSC Audio Products LLC 7 16 RMX Power Transformer Configurations March 2007 and later...

Page 51: ...TTEN CONSENT FROM QSC AUDIO PRODUCTS MAIN PCB 1724 330A 0001 E100 E101 E200 E201 26 CONDUCTOR RIBBON CABLE WITH PIN TO PIN INTERCONNECTS J203 1 26 J1 1 26 INPUT PCB 1724 340B 0102 INPUT PCB WIRE ASSY...

Page 52: ...RODUCTS MAIN PCB 1724 330A 0001 E100 E101 E200 E201 26 CONDUCTOR RIBBON CABLE WITH PIN TO PIN INTERCONNECTS J203 1 26 J1 1 26 INPUT PCB 1724 340B 0102 INPUT PCB WIRE ASSY E9 E10 E212 E11 E12 1 2 J18 G...

Page 53: ...NOT BE DISCLOSED REPRODUCED OR USED WITHOUT EXPRESS WRITTEN CONSENT FROM QSC AUDIO PRODUCTS MAIN PCB 1724 332A 0003 E100 E101 E200 E201 26 CONDUCTOR RIBBON CABLE WITH PIN TO PIN INTERCONNECTS J203 1...

Page 54: ...52 QSC Audio Products LLC...

Page 55: ......

Page 56: ...QSC and the QSC logo are registered trademarks of QSC Audio Products LLC 1665 MacArthur Blvd Costa Mesa CA 92626 Phone 1 714 957 7150 800 772 2834 USA only FAX 1 714 754 6173 www qscaudio com...

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