Mackie SRM450 Service Manual
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Mackie SRM450 Service Manual

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See also: User Manual
Go To Bulletins
SRM450
Powered Speaker
SERVICE MANUAL
©1999,©2000 MACKIE DESIGNS, INC.
820-184-00
Page 3 is interactive

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Summary of Contents for Mackie SRM450

  • Page 1 Go To Bulletins SRM450 Powered Speaker SERVICE MANUAL ©1999,©2000 MACKIE DESIGNS, INC. 820-184-00 Page 3 is interactive...
  • Page 2 SERVICE ON THIS EQUIPMENT IS TO BE PERFORMED BY EXPERIENCED REPAIR TECHNICIANS ONLY...

  • Page 3: Table Of Contents

    Mackie Designs, Service Technical Assistance, is available 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 available, leave a detailed message and a qualified Mackoid will return your call asap.

  • Page 5: Specifications

    Since we are always striving to make our products better by incorporating new and improved materi- als, components, and manufacturing methods, we reserve the right to change these specifications at any time without notice. ©1999 Mackie Designs Inc. All Rights Reserved.

  • Page 6: Overview

    FR Series Power Amplifiers To power these beautiful things, each SRM450 includes two of our acclaimed FR Series “Fast Recovery” power amplifiers. Our exclusive design uses low negative feedback, yet allows the amplifiers to maintain low distortion and stability and to quickly recover when driven into clipping.
  • Page 7 20 feet away. The Cabinet The SRM450 cabinet was designed to be the strongest molded composite cabinet on the planet. This material is as strong as concrete, and rigid enough to prevent unwanted vibrations in the cabinet. It has built-in fly points for hanging, and a socket in the bottom for mounting on a tripod stand.

  • Page 8: Safety Test

    Safety test You must perform the following leakage test before returning the unit to your customer. Take every safety precaution to protect yourself while doing this test. 1. Make a small loading RC circuit as shown in the diagram below, and connect the AC volt meter between the AC power source ground and any exposed metal on the unit under test.

  • Page 9: Bias Adjustment

    Bias adjustment The Amplifier Bias of every SRM450 must be carefully adjusted as follows. 1. Place the SRM450 on its side so that the heatsink fins are horizontal. 2. Connect the power cord and turn it on, with no input signal applied.

  • Page 11: Parts

    SRM-450 PARTS LIST PART# DESCRIPTION PAGES Parts Numbering guide 040- Cables 090-132-xx Master Parts 055- Finished PCB Assy 080-136-00 Cabinet subassembly 100- Pots and resistors 200- Capacitors 055-227-00 Main Board 300- Semiconductors 400- Jacks/Connectors 500- Switches Click on any item to open that page 510- Fuses 550- Chassis Metalwork 600- Transformers...
  • Page 12 510-011-00 FUSE SB 4A 5X20 250V IEC For 230V units 510-024-00 FUSE SB 8A 5X20MM 250V For 100V units 550-398-00 SCRN BACK PNL MAIN SRM450 550-460-00 SHLD M6 PC SRM450 550-488-00 SHLD .015 M6X 4 3/4 ID 1 A1 551-071-00...
  • Page 13 710-052-00 FLYING HW INS WASH BLK 712-068-00 FLYING HW INSERTS 712-069-00 GROMMET LEAD WIRE 750-015-00 FEET 760-115-00 SIDE HANDLE GRIP SRM450 760-116-00 PLASTIC SIDE HANDLE 780-135-00 GASKET WOOFER SRM450 Woofer Gasket 780-138-00 FOAM DA COMP DR TO CASE 780-139-00 FOAM D COMP D TO THROAT...
  • Page 14 227c 055-227-00 Main pcb assembly PART NO. DESCRIPTION VALUE REFERENCE DESIGNATORS 040-311-00 DIS 18GA 1010 GNYL 5 HKLG 100-084-00 RES CF .125W 5% 30K OHM R189 R215 105-464-00 RES MF .125W 1% 60K4 OHM 60K4 R177 R203 110-025-00 RES CF .25W 5% 100 OHM R266 115-361-00 RES MF .25W 1% 5K11 OHM...
  • Page 15 227c PART NO. DESCRIPTION VALUE REFERENCE DESIGNATORS 145-358-00 RES MF SM .1W 1% 4K75 OHM 4K75 R42 R99-100 145-361-00 RES MF SM .1W 1% 5K11 OHM 5K11 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 145-371-00 RES MF SM .1W 1% 6K49 OHM...
  • Page 16 227c PART NO. DESCRIPTION VALUE REFERENCE DESIGNATORS 200-004-02 PLY .047UF 10% 100V TR 0.047 C130 C141 200-023-00 PLY/BX .001UF 20% 250V Y2 .001uF 20% C168 C169 200-024-00 PLY/BX .01UF 20% 250V Y2 .01uF C172 200-027-02 PLY .1UF 5% 100V TR C118 C123 C128 C133 C136 C144-145 C152 C163-164 200-041-00...
  • Page 17 J2-5 400-223-00 XLR PCMNT NEUTRIK-AP SER 400-243-00 HDR 2P .098X1 SHRD J13 Z100 400-307-00 HDR 6P .098X1 SHRD RTA 450-227-00 PCB, SRM450: AMPLIFIER 500-026-00 THERMOSTAT 67F070 PCMNT 67F070 500-037-00 SWITCH 2PDT PUSH V SNAPIN 2P2T SW1-3 510-013-00 FUSE SB 7A 5X20MM 250V...
  • Page 18 Problem: The Amplifier Bias of every SRM450 must be carefully adjusted as follows. Procedure: 1. Place the SRM450 on its side so that the heatsink fins are horizontal. 2. Connect the power cord and turn it on, with no input signal applied.
  • Page 19 THE MACKIE FIXER • MACKIE DESIGNS SERVICE NEWS SRM450 Bias Adjustment, sheet 2 of 2 SRM450 Bias SSE June 1999...
  • Page 20 Description Date Initial Release SRM450 Pole Mount Insert Rework Instructions 851-033-00 REV A Prepared by: ______________________________Date: _____________ Chad Trani Manufacturing Engineer Approved by: ______________________________Date: _____________ Ray Vancour Field Service Manager Approved by: ______________________________Date: _____________ John Ray Quality Assurance Manager...
  • Page 21 SRM450 Pole Mount Insert Rework Instructions Note: These instructions are to be used along with Mackie kit P/N 020-006-00 to repair SRM450s which already have the pole mount insert stripped out. The pole mount bolt assembly (bolt, knurled brass insert and alignment bushing) must still be with the unit as the parts will be recycled and also used during the rework.
  • Page 22 Installation Tool Assembly Insert Installation 6) Place the tool (insert first) into the pole mount hole. 7) Using the small pipe, gently tap the bushing into place so it fits snug. The bushing only needs to be partially installed (as a guide) since it will be removed shortly.
  • Page 23 9) Reverse the drill and back the tool out. A quick, sharp twist once you start to back the tool out will break the tool free from the insert. You do not need to remove the tool slowly as with the installation. The metal bushing will easily pull out along with the installation tool.

  • Page 24: Stabilizing Feet

    SRM450/C300 stabilizing feet ©2000 Mackie Designs Inc. All rights reserved The following are trademarks or registered trademarks of Mackie Designs Inc.: “Mackie” and the “Running man” figure. Part No. 820-158-01 Rev A 8/2000...

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