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A-4

055-227-00 Main pcb assembly

227c

PART NO. DESCRIPTION VALUE REFERENCE DESIGNATORS

040-311-00 DIS 18GA 1010 GNYL 5 HKLG P1
100-084-00 RES CF .125W 5% 30K OHM 30K 5% R189 R215
105-464-00 RES MF .125W 1% 60K4 OHM 60K4 1% R177 R203
110-025-00 RES CF .25W 5% 100 OHM 100 5% R266
115-361-00 RES MF .25W 1% 5K11 OHM 5K11 1% R156 R238
115-364-00 RES MF .25W 1% 6K04 OHM 6K04 1% R25 R45 R78
115-389-00 RES MF .25W 1% 10K0 OHM 10K0 1% R256
115-418-00 RESISTOR CF 20K0 1% 20K0 1% R220 R222
120-097-00 RES MO .5W 5% 10K OHM 10K 5% R261 R263-264
122-081-00 RES MO 2W 5% 2K2 OHM 2K2 5% R254-255
123-009-00 RES MO 3W 5% .22 OHM 0.22 5% R183 R240 R249 R260
123-056-00 RES MO 3W 5% 20 OHM 20 5% R248 R262
125-030-00 RES WW 5W 5% .22 OHM .22 5% R152 R201
130-021-00 POT TRIM 10KB HORIZ 10KB R62 R267
130-038-00 POT TRIM 500B HORIZ 500-B R202 R212
130-078-02 POT 12MM DUAL 10KZD REVLOG 10KZD R265
140-025-00 RES TF SM .1W 5% 10 OHM 10 5% R22
140-042-00 RES TF SM .1W 5% 51 OHM 51 5% R157 R237
140-049-00 RES TF SM .1W 5% 100 OHM 100 5% R1-2 R29 R115 R140 R162
140-066-00 RES TF SM .1W 5% 510 OHM 510 5% R47-48 R55-56
140-073-00 RES TF SM .1W 5% 1K0 OHM 1K0 5% R226 R246
140-080-00 RES TF SM .1W 5% 2K0 OHM 2K 5% R14
140-097-00 RES TF SM .1W 5% 10K OHM 10K 5% R35 R61 R63-64 R85
140-112-00 RES TF SM .1W 5% 39K OHM 39K 5% R107
140-115-00 RES TF SM .1W 5% 51K OHM 51K 5% R70
140-119-00 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 R242-244

R247 R275

145-193-00 RES MF SM .1W 1% 100 OHM 100 1% R28
145-210-00 RESISTOR MF SMT 150 1% R173 R193 R196 R221
145-226-00 RES MF SM .1W 1% 221 OHM 221 1% R76 R191 R217
145-234-00 RES MF SM .1W 1% 267 OHM 267 1% R138
145-239-00 RES MF SM .1W 1% 301 OHM 301 1% R158 R176 R184 R200 R208 R214 R233

R235 R239 R241 R250 R257

145-246-00 RES MF SM .1W 1% 357 OHM 357 1% R280
145-255-00 RES MF SM .1W 1% 442 OHM 442 1% R174-175 R197-198
145-258-00 RES MF SM .1W 1% 475 OHM 475 1% R72
145-268-00 RES MF SM .1W 1% 604 OHM 604 1% R218 R229
145-277-00 RES MF SM .1W 1% 750 OHM 750 1% R182 R210
145-281-00 RES MF SM .1W 1% 825 OHM 825 1% R27
145-289-00 RES MF SM .1W 1% 1K00 OHM 1K00 1% R20-21 R83
145-312-00 RES MF SM .1W 1% 1K74 OHM 1K74 1% R126
145-314-00 RES MF SM .1W 1% 1K82 OHM 1K82 1% R230 R234 R251 R258
145-326-00 RES MF SM .1W 1% 2K21 OHM 2K21 1% R204 R209
145-331-00 RES MF SM .1W 1% 2K49 OHM 2K49 1% R13 R73 R109 R141 R146 R154 R171-172

R190 R192 R194-195 R216 R219

145-335-00 RES MF SM .1W 1% 2K74 OHM 2K74 1% R18
145-339-00 RES MF SM .1W 1% 3K01 OHM 3K01 1% R137
145-341-00 RES MF SM .1W 1% 3K16 OHM 3K16 1% R87
145-346-00 RES MF SM .1W 1% 3K57 OHM 3K57 1% R84 R276
145-350-00 RES MF SM .1W 1% 3K92 OHM 3K92 1% R116 R160
145-354-00 RES MF SM .1W 1% 4K32 OHM 4K32 1% R123 R153
145-356-00 RES MF SM .1W 1% 4K53 OHM 4K53 1% R38 R40 R43-44 R90-92 R94-97 R103

R105-106

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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