Mackie HR824 Service Manual

High resolution active studio monitor

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Owner's manual (20 pages)

Brochure (2 pages)

Hook-up manual (6 pages)

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HR824

High Resolution

Active Studio Monitor

SERVICE MANUAL

820-183-00

Page 3 is interactive

Table of Contents

Summary of Contents for Mackie HR824

Page 1 ® HR824 High Resolution Active Studio Monitor SERVICE MANUAL ©1999 MACKIE DESIGNS, INC. 820-183-00 Page 3 is interactive...
Page 2 C AU TIO N A V IS R IS K O F E L E C T R IC S H O C K D O N O T O P E N R IS Q U E D E C H O C E L E C T R IQ U E N E P A S O U V R IR C A U T IO N : T O R E D U C E T H E R IS K O F A T T E N T IO N : P O U R E V IT E R L E S...
Page 3: Table Of Contents
CONTENTS SHIPPING .................... 3 INTRODUCTION ................. 4 TECHNICAL SUPPORT ..............4 DISCLAIMER................... 4 OVERVIEW..................5 REAR PANEL .................. 6 FRONT PANEL ................7 SPECIFICATIONS ................8 BLOCK DIAGRAM ................9 WIRING DIAGRAM ................10 PACKAGING PARTS ................11 QUICK PARTS................11-12 TEST PROCEDURES ..............13-19 PARTS LIST ...................
Page 4: Introduction
INTRODUCTION This manual contains service information for the HR824 Powered Studio Monitor. It is recommended that you also have a copy of the owner’s manual as this contains the complete operating instructions. WARNING Service on the HR824 must only be undertaken by experienced service technicians.
Page 5: Overview
The amplifiers’ gain and frequency THE PASSIVE RADIATOR responses are individually hand-trimmed by • The HR824 is a bass reflex 6th-order system, a host of infernal adjustment pots to rotating in geo-synchronous orbit. Rather compensate for typical manufacturing than use ports, the vent takes the form of tolerances.
Page 6: Rear Panel
(8 watts). INPUT SENSITIVITY CONTROL • In the ON position, the power amplifiers • The HR824 expects a line-level signal at its are live and operate normally. (The front input connectors. panel ON/OFF switch must also be ON.) •...
Page 7: Front Panel
ON/OFF SWITCH necessary, to reduce the bass response. This • Use this switch to turn on or off the HR824 may allow the HR824s to play louder and from the front. It works with the POWER eliminate most amplifier clipping.
Page 8: Specifications
(310mm) –3 dB @ 47Hz –3 dB @ 80Hz High Freq Equalization: ± 2 dB @ 10kHz, shelving Mackie Designs is always striving to improve our products by incorporating new and improved materials, components and manufacturing Transducers Low-frequency driver: methods. Therefore, we reserve the right to change these specifications at any time without 8.75-inch (222mm) die-cast magnesium frame,...
Page 9: Block Diagram
BLOCK DIAGRAM...
Page 10: Wiring Diagram
WIRING DIAGRAM WOOFER J5-1 BLACK J5-2 WOOFER PCB (J5) J5-4 WHITE TWEETER BLUE J5-3 TWEETER PCB GROUND (GD1) TO REAR COVER PCB GROUND (GD2) TO BRACKET J11-1 J7-1 WAVEGUIDE J11-2 J7-2 PCB (J7) PCB J11 J7-3 J11-3 J11-4 J7-4 E-29 SWITCH WAVEGUIDE PCB E-41...
Page 11: Packaging Parts
PACKAGING CORNERS X 8 MANUAL 810-058-00 Note: Use only the exact packaging shown here. CARDBOARD COLLAR #1 Do not substitute any part 810-059-00 CARDBOARD or the speaker will be COLLAR #2 810-060-00 damaged. 1. Place speaker inside PACKING FOAM 790-019-00 the packing foam (VERY IMPORTANT) bag.
Page 12 QUICK PARTS AMPLIFIER SUB ASSY 080-039-00 (120 VAC) 080-039-01 (230 VAC) 080-039-02 (100 VAC) TWEETER WIRING FOAM HARNESS 080-046-00 810-052-00 PASSIVE RADIATOR ASSEMBLY 080-029-00 PASSIVE RADIATOR GASKET 780-110-00 WOOFER FOAM 810-050-00...
Page 13: Test Procedures
• Manually (and gently) check the woofer for any sticking or rubbing in its travel. NOTE: The four adjustment pots VR2, VR3, VR5 and VR6 are set and glued at the Mackie Factory for optimum performance and should not be touched. The factory settings are made when the speaker is all assembled and its output measured in an anechoic chamber with a calibrated microphone.
Page 14 TEST POINTS NOTE: INSTEAD OF USING J1, YOU CAN MEASURE THE BIAS ACROSS THE EMITTER ENDS OF R22 AND R24 AS SHOWN. +15V EMITTER EMITTER +49V -49V GROUND -56V +56V R166 -15V R170 EMITTER EMITTER NOTE: INSTEAD OF J6, YOU CAN MEASURE THE BIAS ACROSS THE EMITTER ENDS OF R166 AND R170 AS SHOWN.
Page 15 CONNECTING THE LOADS TWEETER LOAD RESISTOR J5 is your time portal vortex to another 8 ohm, 200 Watt realm of audio excitement. If you have a suitable connector, then wire the test loads as shown on the right. If you are not blessed with a spare View from the connector of this type, you can top, looking...
Page 16 LOW FREQUENCY AMPLIFIER TESTS ACOUSTIC SPACE SWITCH Disable the compressor circuit by shorting together pins 1 and 2 of J12. Turn off the amplifier and connect the two resistor loads as shown on the previous page. Set all switches to the NORMAL position and turn on the amplifier. Set your audio signal generator for an output of 300mVrms(-10.46dBV).
Page 17 LOW FREQUENCY AMP TESTS continued LOW FREQ SWITCH TEST Set your audio signal generator for an output of 300mVrms (-10.46dBV) Set the Acoustic Space switch to position A (Quarter Space). Measure the output into the 4 ohm load for the three positions of the LOW FREQ switch. Do these measurements fairly quickly because the amplifier will be warming up.
Page 18 HIGH FREQUENCY AMPLIFIER TESTS. NORMAL RESPONSE TEST Disable the compressor circuit by shorting together pins 1 and 2 of J12. Set your audio signal generator for an output of 300mVrms (-10.46dBV) Set the ACOUSTIC SPACE, LOW FREQ and HIGH FREQ switches to NORMAL. Do these measurements fairly quickly because the amplifier will be warming up.
Page 19 Carefully and gently check by hand that the woofer moves in and out without any rubbing or scraping of the voice coil. • Connect the woofer and tweeter to the HR824 amplifier. • Conduct a listening test and play some low frequency (30 to1kHz) test tones to verify the performance of the woofer driver.
Page 20: Parts List
• Always use the inner box, the outer box and the thin white foam when shipping the HR824 and use all other means of safe-shipping protection. This will protect the finish from getting scuffed up or the woofers from being damaged.
Page 21 PACKING FOAM “THE WHITE STUFF” 800-067-00 BOX INNER - HR824 800-068-00 BOX OUTER - HR824 810-050-00 FOAM CABINET HR824 810-052-00 FOAM TWEETER HR824 810-058-00 INST CORNER - HR824 810-059-00 INST COLLAR - HR824 810-060-00 INST COLLAR 2 - HR824 840-074-00 LBL MACKIE LOGO 3D...
Page 22 PCB Assy 055-094-00 Rev A and B (A/B differences marked in bold print) PART NO. DESCRIPTION REFERENCE DESIGNATORS 040-127-00 DIS 22GA BLK 1C 2.SIN QD 400-091-00 TERM ODISC .187 F 18-22GA 610-012-00 WIR 22GA 1007 BLK 2.5 ST2 040-135-00 DIS 18G 1010 GRNYL 4 LGTM 400-172-00 TERM SOLDER-IN 18AWG 611-038-00...
Page 23 PART NO. DESCRIPTION REFERENCE DESIGNATORS 145-358-00 RESISTOR MF SMT 4K75 R44-45 R66 R85 R87 R98 R121 R128 R185-186 145-361-00 RESISTOR MF SMT 5K11 R16-17 R60-61 R145 145-367-00 RESISTOR MF SMT 5K90 145-381-00 RESISTOR MF SMT 8K25 R41 R51 R113 145-383-00 RESISTOR MF SMT 8K66 R193...
Page 24 PART NO. DESCRIPTION REFERENCE DESIGNATORS 224-004-00 CAP FILM SMT .0022 2.0% 224-006-00 CAP FILM SMT .0047 2.0% C11 C34 C38 C40 224-007-00 CAP FILM SMT .0068 2.0% C35 C53 224-009-00 CAP FILM SMT 2.0% C20-21 C25 C27 C29 C36 C51 224-010-00 CAP FILM SMT 2.0%...
Page 25: Ic And Transistor Charts
PART NO. DESCRIPTION REFERENCE DESIGNATORS 710-020-00 WASHER, COMPRESSION Z46-58 (FOR TRANSISTORS) 710-022-00 WASHER, FLAT Z62-74 (FOR TRANSISTORS) 730-003-00 ADHESIVE, 3M 4799 730-025-00 LOCKTITE 222 510-025-00 FUSE SB 1.25A 5X20 250V UL 230V UNITS FUSES 510-026-00 FUSE SB 3.15A 5X20 250V UL 100V UNITS 510-029-00 FUSE SB 2.5A 5X20 250V UL...
Page 26 STYLE REF DESIG. PART NUMBER DESCRIPTION TYPE Q14,15,28,39 310-023-02 2SC2362K Q16,17,27,38 310-032-02 2SA1016K Q5, Q37 310-025-00 2SD1047 Q7, Q35 310-024-00 2SB817 Q1, Q2, Q41 310-029-00 2SD1264A Q9, Q30, Q32 310-028-00 2SB940A Q6, Q36 310-037-00 MJE340 Q10, Q33 310-036-00 2SC3788 Q3, Q42 310-035-00 2SA1478 Q19, Q20, Q43...
Page 27 Rev A board. See the parts list for details. (There is no need to change to the new parts if you have a Rev A board). HR824 SCHEMATIC REV A and B sheet 1 of 2 ©1998, ©1999 Mackie Designs Inc. All Rights Reserved...
Page 29 2SB817 2SB940A 1/4" STEREO JACK 400-166-00 XLR (FEMALE) CONNECTOR 400-131-00 IEC CONNECTOR 400-132-00 2SB940A 2SB940A 2SB817 MJE340 2SD1047 2SD1264A 67F070 THERMOSTAT 310-028-00 310-028-00 310-024-00 310-037-00 310-025-00 310-029-00 500-026-00 HR824 BOARD REV A ©1998, ©1999 Mackie Designs Inc. All Rights Reserved...
Page 31 IEC CONNECTOR 400-132-00 2SB940A 2SB940A 2SB817 MJE340 2SD1047 2SD1264A 67F070 THERMOSTAT 310-028-00 310-028-00 310-024-00 310-037-00 310-025-00 310-029-00 500-026-00 HR824 BOARD REV B, Oct 98 ©1998, ©1999 Mackie Designs Inc. All Rights Reserved...
Page 38 MAKE SURE IT IS PUSHED ALL THE WAY DOWN TOWARDS THE TWEETER WOOFER FOAM GLUE TO H BRACE WITH LOCTITE 410 AND BLACK MAGIC ACCELERATOR MAKE SURE THE FOAM DOES NOT TOUCH THE PASSIVE RADIATOR. A-12 HR824 ASSEMBLY ©1998, ©1999 Mackie Designs Inc. All Rights Reserved...
Page 39 THE WIRES ARE CAREFULLY TYRAPPED AT THE FACTORY. TAKE CARE THAT THE WIRES ARE TIGHT AND DO NOT TOUCH THE PASSIVE RADIATOR, OR HANG DOWN AND TOUCH THE CIRCUIT BOARD. A-13 HR824 ASSEMBLY ©1998, ©1999 Mackie Designs Inc. All Rights Reserved...

Mackie HR824 Service Manual

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