Mackie HR824 Wartungshandbuch

HR824High ResolutionActive Studio MonitorSERVICE MANUAL1999 MACKIE DESIGNS, INC.820-183-00Page 3 is interactive

10WIRING DIAGRAMJ4J5J7J8&9J5-1J5-2J5-4J5-3J7-1J7-2J7-3J7-4J4-1J4-2J4-3PCB (J4)PCB (J7)PCB (J5)REDWOOFERWOOFERTWEETERTWEETERBLACKWHITEBLUEPCB GROUN

11780-102-00WAVEGUIDE GASKET 490-003-00TWEETER551-501-00WAVEGUIDE500-016-00SWITCH490-001-00WOOFER480-103-00WOOFERGASKETTWEETERGASKETPART OF480-103-00L

12AMPLIFIER SUB ASSY080-039-00 (120 VAC)080-039-01 (230 VAC)080-039-02 (100 VAC)PASSIVE RADIATORASSEMBLY 080-029-00PASSIVE RADIATORGASKET780-110-00TWE

13TEST PROCEDURESREQUIRED TESTSThe following pages contain the test procedures for the amplifier section disconnectedfrom the woofer and tweeter. For

14SW5 SW3 SW4SW2R184VR1J1J6VR4+15VE1-15VE80+56VE89-49VE32GROUND+49VE13-56VE34R24EMITTERENDR22EMITTERENDR170EMITTERENDR166EMITTERENDNOTE: INSTEAD OF US

15WOOFERLOAD RESISTOR4 ohm, 200 WattTWEETERLOAD RESISTOR8 ohm, 200 WattBlueRedBlackWhiteJ5SW5 SW3 SW4SW2R184TWEETERPOSITIVE(= WHITE J5)TWEETER NEGATIV

16LOW FREQUENCY AMPLIFIER TESTSACOUSTIC SPACE SWITCHDisable the compressor circuit by shorting together pins 1 and 2 of J12.Turn off the amplifier and

17LOW FREQUENCY AMP TESTS continuedLOW FREQ SWITCH TESTSet your audio signal generator for an output of 300mVrms (-10.46dBV)Set the Acoustic Space swi

18HIGH FREQUENCY AMPLIFIER TESTS.NORMAL RESPONSE TESTDisable the compressor circuit by shorting together pins 1 and 2 of J12.Set your audio signal gen

19POWER TESTSDisable the compressor circuit by shorting together pins 1 and 2 of J12.Set all of the switches to NORMAL and measure the output power of

2 CAUTION AVIS RISK OF ELECTRIC SHOCKDO NOT OPENRISQUE DE CHOC ELECTRIQUENE PAS OUVRIRCAUTION: TO REDUCE THE RISK OFELECTRIC SHOCK DO NOT REMOVETHE C

20Parts Numbering guide040- Cables055- Finished PCB Assy100- Pots and resistors200- Capacitors300- Semiconductors400- Jacks/Connectors500- Switches510

21PART NO. DESCRIPTION QTY NOTES080-029-00 PASSIVE RADIATOR ASSEMBLY 1 (ORDER AS A COMPLETE ASSEMBLY)055-094-00 PCB ASSEMBLY 1 (SEE PAGES 22-24 FOR TH

22PART NO. DESCRIPTION REFERENCE DESIGNATORS040-127-00 DIS 22GA BLK 1C 2.SIN QD400-091-00 TERM ODISC .187 F 18-22GA610-012-00 WIR 22GA 1007 BLK 2.5 ST

23PART NO. DESCRIPTION REFERENCE DESIGNATORS145-358-00 RESISTOR MF SMT 4K75 1% R44-45 R66 R85 R87 R98 R121 R128 R185-186145-361-00 RESISTOR MF SMT 5K1

24PART NO. DESCRIPTION REFERENCE DESIGNATORS224-004-00 CAP FILM SMT .0022 2.0% C31224-006-00 CAP FILM SMT .0047 2.0% C11 C34 C38 C40224-007-00 CAP FIL

25123443218765STYLE REF DESIG. PART NUMBER DESCRIPTION112344U1-14-15V+15V320-004-00 NJM4560DUAL OP AMPSTYLE REF DESIG. PART NUMBER DESCRIPTIONLDR1 329

26STYLE REF DESIG. PART NUMBER DESCRIPTION TYPE310-023-02Q14,15,28,39 2SC2362K NPN310-032-02Q16,17,27,38 2SA1016K PNPQ5, Q37 310-025-00 2SD1047 NPNQ7,

3CONTENTSSHIPPING ...3INTRODUCTION ...

4INTRODUCTIONThis manual contains service information for the HR824 Powered Studio Monitor. It isrecommended that you also have a copy of the owner’s

5THE AMPLIFIERS• The Fast Recovery amplifier design uses lownegative feedback, yet allows theamplifiers to maintain low distortion andstability even w

6LOW FREQ SWITCH• The LOW FREQ switch inserts a steep low-frequency rolloff into the response curve.• For most applications, use the 47Hz setting.• If

7and volume for the monitors. Change theLOW FREQ switch to 47Hz or 80Hz, ifnecessary, to reduce the bass response. Thismay allow the HR824s to play l

8SPECIFICATIONSAmplifier SectionLow-frequency amplifier:Rated power output: 150 watts, 4Ω loadBurst power output: 350 wattsDistortion: THD: < 0.035

9BLOCK DIAGRAM