Mackie C300 Service Manual

SRM450Powered SpeakerSERVICE MANUAL1999,2000 MACKIE DESIGNS, INC.820-184-00Page 3 is interactiveGo To Bulletins

10LOW FREQUENCYBIAS TEST POINTLOW FREQUENCYBIAS ADJUSTMENT POTHIGH FREQUENCYBIAS TEST POINTHIGH FREQUENCYBIAS ADJUSTMENT POT+80V+15 VDC-15 VDC-80V +45

A-1PART# DESCRIPTION PAGES090-132-xxMaster Parts A-2080-136-00Cabinet subassembly A-3055-227-00Main Board A-4SRM-450 PARTS LISTParts Numbering guide04

A-2PART NO. DESCRIPTION REV QTYNOTES090-132-00 SRM450 120V 9 A3 1080-112-00 SA HTSK/XFMR/BD 12IN SPKR B1 A21080-112-01 SA AMP SRM450 230V A2 A21055-

A-3PART NO. DESCRIPTION REV QTYNOTES055-280-00 PCB ASSY LED 1080-156-00 SA CABLE PCB LED BLK/WHT 1080-157-00 SA SUPPORT DRIVER THROAT 1080-158-00 SA H

A-4055-227-00 Main pcb assembly227cPART NO. DESCRIPTION VALUE REFERENCE DESIGNATORS040-311-00 DIS 18GA 1010 GNYL 5 HKLG P1100-084-00 RES CF .125W 5% 3

A-5PART NO. DESCRIPTION VALUE REFERENCE DESIGNATORS227c145-358-00 RES MF SM .1W 1% 4K75 OHM 4K75 1% R42 R99-100145-361-00 RES MF SM .1W 1% 5K11 OHM 5K

A-6227c200-004-02 PLY .047UF 10% 100V TR 0.047 10% C130 C141200-023-00 PLY/BX .001UF 20% 250V Y2 .001uF20% C168 C169200-024-00 PLY/BX .01UF 20% 250V Y

A-7227c300-003-00 DIO SW DL4148 100V SM DL4148 D1-15 D19-21 D23-25 D27-31 D35 D37-41D44 D47-48 D54300-010-00 DIO SIG RLS245 220V 200MA RLS245 D26 D32

SRM450 Bias SSE June 19991. Place the SRM450 on its side so that the heatsink fins are horizontal.2. Connect the power cord and turn it on, with no in

SRM450 Bias SSE June 1999LOW FREQUENCYBIAS TEST POINTLOW FREQUENCYBIAS ADJUSTMENT POTHIGH FREQUENCYBIAS TEST POINTHIGH FREQUENCYBIAS ADJUSTMENT POT+80

2 SER

Description Rev DateInitial Release ASRM450 Pole Mount InsertRework Instructions851-033-00 REV APrepared by: ______________________________Date: ____

Page 2 of 4SRM450 Pole Mount Insert Rework InstructionsNote: These instructions are to be used along with Mackie kit P/N 020-006-00 torepair SRM450s

Page 3 of 4Installation Tool AssemblyInsert Installation6) Place the tool (insert first) into the pole mount hole.7) Using the small pipe, gently tap

Page 4 of 49) Reverse the drill and back the tool out. A quick, sharp twist once you start toback the tool out will break the tool free from the inse

123123©2000 Mackie Designs Inc. All rights reservedThe following are trademarks or registered trademarks ofMackie Designs Inc.: “Mackie” and the “Runn

3CONTENTSIntroduction...3Block diagram...

4Block DiagramINPUTTHRU1J151HI-PASSLOW CUT CONTOURCOMPRESSORTHRESHOLDCOMPRESSORSWEEPINGFILTERLO-PASSDELAY176uSHI-FREQ40-120 HzLO-FREQUENCYDRIVERTWEETL

5SpecificationsLow-Frequency TransducerDiameter 300mm (12”)Voice Coil Diameter 63.5mm (2.5”)Sensitivity (1W@1m) 98 dBNominal Impedance 8 ohmsPower Han

6OverviewThe SRM450 is an active two-way loudspeaker system capable of extremely high soundpressure levels.The TransducersThe SRM450 active monitors f

7The CrossoverThe built-in electronic crossover is a 24 dB/octave Linkwitz-Riley design.Although more expensive than other crossover designs, the bene

8You must perform the following leakage test before returning the unit to your customer.Take every safety precaution to protect yourself while doing t

9Bias adjustment1. Place the SRM450 on its side so that the heatsink fins are horizontal.2. Connect the power cord and turn it on, with no inputsignal