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A-5

PART NO. DESCRIPTION VALUE REFERENCE DESIGNATORS

227c

145-358-00 RES MF SM .1W 1% 4K75 OHM 4K75 1% R42 R99-100
145-361-00 RES MF SM .1W 1% 5K11 OHM 5K11 1% R3-4 R9 R11 R30 R66-69 R79-81 R102 R120

R124 R127 R142

145-369-00 RES MF SM .1W 1% 6K19 OHM 6K19 1% R15
145-371-00 RES MF SM .1W 1% 6K49 OHM 6K49 1% R111-112 R159
145-373-00 RES MF SM .1W 1% 6K81 OHM 6K81 1% R136
145-375-00 RES MF SM .1W 1% 7K32 OHM 7K32 1% R89
145-377-00 RES MF SM .1W 1% 7K50 OHM 7K50 1% R46 R98 R101 R169
145-381-00 RES MF SM .1W 1% 8K25 OHM 8K25 1% R139
145-384-00 RES MF SM .1W 1% 8K87 OHM 8K87 1% R37
145-389-00 RES MF SM .1W 1% 10K0 OHM 10K0 1% R7-8 R19 R23-24 R31-33 R36 R88 R108

R117 R129 R132-133 R143 R161 R165
R268-273

145-390-00 RES MF SM .1W 1% 10K2 OHM 10K2 1% R150-151 R274
145-394-00 RES MF SM .1W 1% 11K3 OHM 11K3 1% R148
145-395-00 RES MF SM .1W 1% 11K5 OHM 11K5 1% R134
145-406-00 RES MF SM .1W 1% 15K0 OHM 15K0 1% R16 R34 R135
145-409-00 RES MF SM .1W 1% 16K2 OHM 16K2 1% R119 R281
145-412-00 RES MF SM .1W 1% 17K4 OHM 17K4 1% R279
145-418-00 RES MF SM .1W 1% 20K0 OHM 20K0 1% R41 R121-122 R144 R167 R170 R225

R227-228 R245 R252-253 R259

145-422-00 RES MF SM .1W 1% 22K1 OHM 22K1 1% R5 R12
145-435-00 RES MF SM .1W 1% 30K1 OHM 30K1 1% R50 R53-54 R113-114 R125
145-437-00 RES MF SM .1W 1% 31K6 OHM 31K6 1% R277
145-439-00 RES MF SM .1W 1% 33K2 OHM 33K2 1% R74
145-441-00 RES MF SM .1W 1% 34K8 OHM 34K8 1% R278
145-442-00 RES MF SM .1W 1% 35K7 OHM 35K7 1% R49 R52
145-454-00 RES MF SM .1W 1% 47K5 OHM 47K5 1% R10 R77
145-471-00 RES MF SM .1W 1% 71K5 OHM 71K5 1% R39 R51
145-473-00 RES MF SM .1W 1% 75K0 OHM 75K0 1% R118 R147 R163
145-477-00 RES MF SM .1W 1% 82K5 OHM 82K5 1% R128 R166
145-479-00 RES MF SM .1W 1% 86K6 OHM 86K6 1% R86
145-485-00 RES MF SM .1W 1% 100K OHM 100K 1% R110 R168
145-498-00 RES MF SM .1W 1% 137K OHM 137K 1% R104
145-514-00 RES MF SM .1W 1% 200K OHM 200K 1% R17
145-518-00 RES MF SM .1W 1% 221K OHM 221K 1% R65
145-522-00 RES MF SM .1W 1% 243K OHM 243K 1% R130
145-550-00 RES MF SM .1W 1% 475K OHM 475K 1% R155
145-553-00 RES MF SM .1W 1% 511K OHM 511K 1% R131
145-560-00 RES MF SM .1W 1% 604K OHM 604K 1% R149
145-565-00 RES MF SM .1W 1% 681K OHM 681K 1% R82
150-009-00 RES FUS .25W 5% 2.2 OHM 2.2 5% R164 R178 R180 R206 R211 R236
150-037-00 RES FUS .25W 5% 33 OHM 33 5% R179 R181 R186-188 R199 R207 R213
150-045-00 RES FUS .25W 5% 68 OHM 68 5% R185 R205

Components  noted with this symbol shall be replaced only by the component specified.
This is required to maintain product safety.

Summary of Contents for SRM 450

Page 1: ...SRM450 Powered Speaker SERVICE MANUAL 1999 2000 MACKIE DESIGNS INC 820 184 00 Page 3 is interactive Go To Bulletins...

Page 2: ...2 SERVICE ON THIS EQUIPMENT IS TO BE PERFORMED BY EXPERIENCED REPAIR TECHNICIANS ONLY...

Page 3: ...ailable 8AM 5PM PST Monday through Friday for Authorized Mackie Service Centers at 1 800 258 6883 Feel free to call with any questions and speak with a carefully calibrated technician If one is not av...

Page 4: ...ENCY DRIVER TWEET LO FREQ AMP HI FREQ AMP SENSE RESISTOR BASS CONTROL SERVO LOOP WOOF PEAK LIGHT PEAK DETECTION THRESHOLD LPF THRESHOLD MID VDC LO VDC HI VDC TOROIDAL POWER TRANSFORMER FUSE POWER SWIT...

Page 5: ...4 dBu centered Mic 36 dBu Maximum Input Level Line 22 dBu Low Cut Frequency 75Hz Second order filter EQ Peaking 3 dB 55Hz 3 dB 20kHz Over Excursion Protection Second Order High Pass Filter Thermal Pr...

Page 6: ...watts peak 300 continuous before clipping The high frequency amplifier produces up to 150 watts peak 100 continuous before clipping Each amplifier has its own compressor circuit that acts when the in...

Page 7: ...ncy resulting in perfect power response Our heroic engineers have worked carefully to ensure that the SRM450 also provides perfect phase response This diligence has yielded phenomenal accuracy even if...

Page 8: ...unit under test 2 Connect the unit under test to an AC power source using a ground lift adaptor leaving the unit s safety ground floating Turn the unit on 3 The meter reading should be less than 750mV...

Page 9: ...e amplifier so it can be safely turned on again 6 Replace the power cord and turn on the amplifier and take care not to touch any exposed live AC components 7 No input signal is applied 8 Low frequenc...

Page 10: ...10 LOW FREQUENCY BIAS TEST POINT LOW FREQUENCY BIAS ADJUSTMENT POT HIGH FREQUENCY BIAS TEST POINT HIGH FREQUENCY BIAS ADJUSTMENT POT 80V 15 VDC 15 VDC 80V 45V 45V...

Page 11: ...Capacitors 300 Semiconductors 400 Jacks Connectors 500 Switches 510 Fuses 550 Chassis Metalwork 600 Transformers 601 Inductors 610 Wires and Cables 640 AC line cords 700 Hardware 760 Knobs Plastic 770...

Page 12: ...5 16 18 2IN STL A 1 701 016 00 5 20X5 16 PHPII TYP B BLK A 4 705 001 00 KEPNUT 6 32 A 2 705 005 00 NUT LOCK 4 40 A 4 705 018 00 NUT HEX 5 16 18 GD 5 A 1 710 005 00 WASHER INT STAR NO 6 BLK A 4 710 017...

Page 13: ...028 00 SCREW FEET GRILL CD THR 13 701 029 00 SCREW PCB ASSY LED 1 705 031 00 FLYING HW INS NUTS GALV 8 705 032 00 FLYING HW INS NUTS BLK 2 710 049 00 WASH HDL MTNG TO CASE 4 710 050 00 WASH FLAT WOOF...

Page 14: ...00 RES TF SM 1W 5 75K 75K 5 R71 140 123 00 RES TF SM 1W 5 100K OHM 100K 5 R26 R57 60 R93 140 147 00 RES TF SM 1W 5 1M OHM 1M 5 R75 145 162 00 RES MF SM 1W 1 47R5 OHM 47R5 1 R6 R145 R223 224 R231 232 R...

Page 15: ...00 RES MF SM 1W 1 22K1 OHM 22K1 1 R5 R12 145 435 00 RES MF SM 1W 1 30K1 OHM 30K1 1 R50 R53 54 R113 114 R125 145 437 00 RES MF SM 1W 1 31K6 OHM 31K6 1 R277 145 439 00 RES MF SM 1W 1 33K2 OHM 33K2 1 R74...

Page 16: ...C96 C126 220 002 02 LYT 47UF 20 25V RAD TR 47UF 20 C13 C24 25 C30 C35 C47 C119 C146 C149 C153 C157 159 220 004 02 LYT 470UF 20 6 3V RAD TR 470UF 10 C1 220 005 02 LYT 470UF 20 25V RAD TR 470UF 10 C156...

Page 17: ...11 007 00 XSTR PNP 2SA1415 2SA1415 Q6 Q17 Q22 Q24 311 008 00 XSTR NPN 2SC3645 2SC3645 Q7 Q13 Q16 Q36 311 019 00 XSTR PNP 2SB792 SM 2SB792 Q27 28 Q39 40 311 020 00 XSTR NPN 2SD814 2SD814 Q25 26 Q37 38...

Page 18: ...e the power cord and turn on the amplifier and take care not to touch any exposed live AC components 7 No input signal is applied 8 Low frequency amplifier bias adjustment While the heatsink is still...

Page 19: ...ERVICE NEWS SRM450 Bias SSE June 1999 LOW FREQUENCY BIAS TEST POINT LOW FREQUENCY BIAS ADJUSTMENT POT HIGH FREQUENCY BIAS TEST POINT HIGH FREQUENCY BIAS ADJUSTMENT POT 80V 15 VDC 15 VDC 80V 45V 45V SR...

Page 20: ...0 REV A Prepared by ______________________________Date _____________ Chad Trani Manufacturing Engineer Approved by ______________________________Date _____________ Ray Vancour Field Service Manager Ap...

Page 21: ...e by hand one or two sharp jerks on the bolt should pull the assembly free Pole Mount Bolt Assembly 2 Unscrew the defective brass knurled insert from the bolt and remove the black metal bolt bushing 3...

Page 22: ...insert tool and drive insert into position clockwise Insert will stop against shoulder when at correct installed depth NOTE DO NOT drive the insert in fast Doing so will damage the plastic hole and d...

Page 23: ...nt Plastic burrs from insert installation 11 Take the installation tool out of the drill and remove the metric nut from the threaded end of the tool 12 To reinstall the black metal bushing screw the i...

Page 24: ...esigns Inc Mackie and the Running man figure Part No 820 158 01 Rev A 8 2000 SRM450 C300 stabilizing feet 2000 Mackie Designs Inc All rights reserved The following are trademarks or registered tradema...

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