Mackie SR1530 User manual

SR1530
Active Speaker
SERVICE MANUAL
2000 MACKIE DESIGNS, INC.
Go To Bulletins

2
SERVICE ON THIS EQUIPMENT IS TO BE PERFORMED BY
EXPERIENCED REPAIR TECHNICIANS ONLY

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CONTENTS
Introduction..................................................................... 3
Overview.......................................................................... 4
Specifications................................................................... 5
Test procedure................................................................. 6
Safety test ........................................................................ 8
Parts................................................................................... 9
Service bulletins ............................................................... 19
Fold-out Sections
Schematics and PCB layouts
Amplifier board .......................................................... Amp-1
Filter board................................................................. Filter-1
Wiring diagrams ......................................................... Wiring-1
INTRODUCTION
This manual contains basic service information. It is essential that you have a copy of the
user’s manual as this contains the complete operating instructions.
SERVICE TECHNICAL ASSISTANCE
MackieDesigns, Service TechnicalAssistance, isavailable 8AM- 5PMPST, Mondaythrough
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.
DISCLAIMER
The information contained in this manual is proprietary to Mackie Designs, Inc. The entire
manual is protected under copyright and may not be reproduced by any means without
express written permission from Mackie Designs, Inc.
SERVICE ON THIS EQUIPMENT IS TO BE PERFORMED BY
EXPERIENCED REPAIR TECHNICIANS ONLY
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ALL BOARDS

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The SR1530 is a high output, horn loaded, 3-way, wide dispersion, active sound
reinforcement system. It features a one-piece 90º x 40º horn, which includes both the mid
and high frequency sections in a proprietary “Optimal Wavefront” design. Unlike typical
mid/high horn designs, the high frequency section is positioned to fire down into the six-
inch mid-range’s dispersion pattern. This creates a focused, single wave front with
excellentphase and powerresponse characteristics.
The mid-range transducer operates between 700Hz and 3000Hz, eliminating the
placement of a crossover point in the middle of critical voice frequencies. Frequencies
above 3000Hz are reproduced by a 1-inch exit compression driver. The low frequencies
are produced through a high output 15-inch woofer.
The SR1530 accepts a line-level signal via a female XLR input jack. A male XLR Thru jack is
provided for daisy-chaining the signal to additional SR1530 cabinets.
Two built-in power amplifiers provide 100 watts each for the mid-frequency and high-
frequencydrivers. Thelow-frequencydriver ispowered bya high-efficiency,high-current
Class G topology amplifier providing 300 watts of power. The amplifier modules sit on a
large heatsink that eliminates the need for fans, dramatically extending life expectancy,
andeliminatingmaintenance cycles.
The cabinet is constructed using both 18mm multi-layered plywood and pressure injected
structural resin. Two carrying handles are integrated into each side for easy loading and
transport.
OVERVIEW

5
SPECIFICATIONS
System Specifications
FrequencyRange 40Hz–20kHz
Frequency Response (–3 dB)
45Hz–18kHz
Horizonal Coverage Angle (–6 dB)
90º averaged 2kHz to 10kHz
Vertical Coverage Angle (–6 dB)
40º averaged 2kHz to 10kHz
Directivity Factor; DI (Q)10.77 (11.95)
averaged 2kHz to 10kHz
Maximum SPL @ 1m 123 dB
Peak Output @ 1m 126 dB
Crossover Points 700Hz, 3000Hz
DynamicRange > 100 dB
Phase Response ±40º from 500Hz to
10kHz
Input Type Balanced
differential
Input Impedance 50K ohms
Input Protection Monitoring and
limiting of
continuous rms
output of the
amplifiers
Thermal Protection Input stage
muting,
auto-reset
Transducer Specifications
Low-Frequency Transducer
Diameter 15” (381mm)
Voice Coil Diameter 2.5” (63mm)
Power Handling 250 watts rms
Mid-Frequency Transducer
Diameter 6” (152mm)
Voice Coil Diameter 2” (50mm)
Power Handling 60 watts rms
High-Frequency Transducer
Diaphragm Diameter 1” (25mm)
Voice Coil Diameter 1” (25mm)
Power Handling 25 watts rms
Diaphragm Material Mylar
Power Amplifiers
Low-Frequency Power Amplifier
Burst Capability 300 watts
Rated THD < 0.05%
Design Class G, High
Efficiency/High
Current
Mid and High-Frequency Power Amplifiers
Burst Capability 100 watts
Rated THD < 0.1%
Design: Integrated Module
Line Input Power
US 120V, 60Hz
Recommended Amperage Service
8 amps
Europe 230V, 50Hz
Recommended Amperage Service
5 amps
Physical Properties
Height 43.9” (1116mm)
Front Width 19.1” (484mm)
Rear Width 13.9”(352mm)
Depth 18.1” (460mm)
Weight 100 lbs. (45.5kg)
Enclosure 18mm thick multi-layered
plywood, top and bottom
high pressure resin injected
“caps”
Enclosure Geometry
Trapezoidal, 10º angle
sides
Mounting Methods
Floor mount
Disclaimer
Since we are always striving to make our
products better by incorporating new and
improved materials, components, and
manufacturing methods, we reserve the right
to change these specifications at any time
without notice.
“Mackie” and the “Running Man” figure are
trademarks or registered trademarks of Mackie
Designs Inc.
All other brand names mentioned are
trademarks or registered trademarks of their
respective holders, and are hereby
acknowledged.
©2000 Mackie Designs Inc.
All Rights Reserved.
Printed in Italy.

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TEST EQUIPMENT
Audiogenerator/analyser
Oscilloscope
Voltmeter
2 load resistors 16 ohm, 200W
1 load resistor 8 ohm, 100W
Variac with voltage and current-draw meters
1 INSPECTION
1.1 Inspect all components, solder, wires, connectors, screws, heatsink screws. Make
sure all transistors and IC amps are secured correctly to the heatsink.
2 CONNECTIONS
2.1 Connect the two 16 ohm loads to the Low and High outputs (Low+ Low- and Hi+ Hi -).
2.2 Connect the 8 ohm load to the Mid outputs (Mid+ and Mid -).
2.3 Connect the audio generator’s output to the XLR input of the SR1530.
2.5 Initially connect the analyser and scope to the 16 ohm load on the Low Freq section.
2.6 Connect the variac to the AC connector of the SR1530.
2.7 Set the frequency to 200 Hz, at minimum output.
2.8 Turn on the SR1530 Power Switch
3 POWER UP
3.1 Slowly bring the Variac up to 115 Vac (230 Vac for European models).
3.2 Verify that the green led is illuminated.
3.3 Verify an ac current draw of: 340 mA ± 10 % (115 Vac)
170 mA ± 10 % (230 Vac).
3.4 Verify with a DC voltmeter the values of the two DC rails (± 25 Vdc; ± 50 Vdc)
with a tolerance of approx 1.5 Vdc for the 25V rail and approx 2 Vdc for the
50V rail.
Amplifier Test Procedure
NOTE: The amplifiers are
operated in mono, so the negative
output terminals must not be
grounded by your test equipment.
Use an oscilloscope in Differential
mode.

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4 VERIFICATION OF THE LOW FREQUENCY SECTION.
4.1 Initially set the input signal to 30 mV at 100Hz.
4.2 Increase the input signal slowly until the limiter starts to stabilize the output to
35V (approximately 76.7W) with an input of approx 250 mV.
4.3 Lower the input signal until the limiter is not operating. The input signal should be approx
220\230mV) and the output signal should be 32V (approx 63.5 W into the 16 ohm load).
4.4 Bypass the limiter temporarily by shorting the led section of the optocoupler, and
increase the input signal until the output signal is clipping. Verify this occurs at approx 53
volts (180 W into the 16 ohm load). The input signal should be approx 380mV.
4.5 Remove the short circuit and verify that the limiter kicks in after 7 or 8 seconds.
5 VERIFICATION OF THE HIGH FREQUENCY SECTION.
5.1 Connect the analyser and scope to the 16 ohm load on the High Freq section.
5.2 Initially set the input signal to 100 mV at 10 kHz.
5.3 Increase the input signal slowly until the limiter starts to stabilize the output to
10.1V (approx 6.4W into 16 ohms) with an input of approx 240 mV.
5.4 Lower the input signal until the limiter is not operating. The input signal should be approx
190\200mV) and the output signal should be 7.9V (approx 3.9 W into 16 ohms).
5.5 Bypass the limiter temporarily by shorting the led section of the optocoupler, and
increase the input signal until the output signal is clipping. Verify this occurs at
approx 19.2 volts (23 W into 16 ohms). The input signal should be approx 441 mV.
5.6 Remove the short circuit and verify that the limiter kicks in after 6 to 7 seconds.
6 VERIFICATION OF THE MID FREQUENCY SECTION.
6.1 Connect the analyser and scope to the 8 ohm load on the Mid Freq section.
6.2 Initially set the input signal to 120 mV at 1 kHz.
6.3 Increase the input signal slowly until the limiter starts to stabilizes the output to
14.6V (approx 26.7W into 8 ohms) with an input of approx. 560 mV.
6.4 Lower the input signal until the limiter is not operating. The input signal should be approx
490\500mV) and the output signal should be 12.9V (approx 20.9 W into 8 ohms).
6.5 Bypass the limiter temporarily by shorting the led section of the optocoupler, and
increase the input signal until the output signal is clipping. Verify this occurs at
approx 24 volts (72 W into 16 ohms). The input signal should be approx 940 mV.
6.6 Remove the short circuit and verify that the limiter kicks in after 5 to 6 seconds.

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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.
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 750mVAC (note: this is equivalent to 0.5mA of
leakagecurrent).
4. Flip the plug over in the receptical so the hot and neutral are swapped.
Verify that the reading is still less then 750mVAC.
5. If either reading is greater than 750mVAC, then you must investigate and repair the unit
before returning it to your customer.
Safety test

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SR1530 PARTS LIST
WARNING: IN THE PAGES WHICH FOLLOW, PARTS WHICH ARE
MARKED WITH THE WARNING TRIANGLE SHOULD ONLY BE REPLACED
WITH EXACT REPLACEMENT PARTS. THIS IS REQUIRED TO MAINTAIN
PRODUCT SAFETY.
PART# DESCRIPTION PAGE
13110050 SR1530 ASSEMBLY 10
23103130 AMPLIFIER SUBASSEMBLY 11
23103130 AMPLIFIER SUBASSEMBLY (dual volt) 11
23103130 AMPLIFIER SUBASSEMBLY (115V) 11
23103810 AMPLIFIER SUBASSEMBLY (100V) 12
23103710 AMPLIFIER SUBASSEMBLY (230V) 13
23103820 AMPLIFIER SUBASSEMBLY (240V) 13
3020490 AMPLIFIER PCB ASSEMBLY 14
23030110 FILTER PCB ASSEMBLY 15
EARLY AMPLIFIER ASSEMBLY 16
LATEST AMPLIFIER COMMON PARTS 18
RECONEKIT 18

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13110050 SR 1530 ASSEMBLY 115V
PART# DESCRIPTION QTY COMMENTS
SC034351 WIRING DIAGRAM REVD 1
21110110 LOUDSPEAKER L15-64-MAS 1530 REVA 1 WOOFER
21110120 MR 160-MAS 1530 REVA 1 MIDRANGE
23020480 LED BOARD ASSEMBLY 1
23030110 FILTER ASSEMBLY 1 SEE PAGE 13
23103130 AMPLIFIER SUBASSEMBLY 1 SEE PAGE 11
23103150 LOUDSPEAKER CABLE ASSEMBLY 1
23103490 LED CABLE ASSEMBLY 1
25110160 TWEETER N 270-MAS 1530 REVA 1 TWEETER
33090410 CABINET 34231 1
33090460 HANDLE HOUSING 34278 2
33161060 WOOFER GASKET 23630 1
33180120 TOP VENTILATION PLATE 34332 1 FITS ON TOP OF AMPLIFIER
33180360 LOWER VENTILATION PLATE 35271 1 FITS ON BOTTOM OF AMPLIFIER
33221510 FRONT GRILL 35723 1
33890150 VIBRATION-DAMPING MATERIAL 23418 1 MOUNTS INSIDE, NEAR THE HOLE
FOR THE STAND
33890190 CABINET FEET 34344 4
33900120 SIDE HANDLE BAR 33939 2 HANDLE BAR
33900360 CIRCULAR PLUGS 34360 2 TOP/BOTTOM PLUGS WITH LOGO
33900470 REFLEX PORT 35255 2 CIRCULAR BASS REFLEX PORTS
33910660 ABSORBENT FOAM 35724 1
33910670 ABSORBENT FOAM 35739 2
33920590 PLASTIC SIDE HANDLE GRIP 34280 2 HANDLE GRIP
33920650 TOP HANDLE 34335REV B 2 TOP HANDLE
33951530 MACKIE LABEL 34342 1
33951540 MACKIE ACTIVE LOGO 34343 1
33951980 RUNNING MAN LOGO 34844 1
33990990 PACKAGING BOX 34357 1
33991000 INTERNAL PACKAGING 34358 1
33991010 INTERNAL PACKAGING 34367 4
33994410 INTERNAL PACKAGING 35551 1
33995370 ANGLE 1800 33302
33995500 PACKAGECOVER35706 1
33995510 PALLET 35705 1 WOODEN PALLET PACKAGING
43900580 RUBBER “U” PROFILE 200S 1
43900600 GROMMET 34582 2
43900820 GASKET 32181 1
51150351 SCREW V.TC+M4 X30ZNN U7687 8
51170415 SCREW V.TSC+M5 X10ZNN U7689 8
51190230 SCREW V.TCEI M5 X20 ZNN U5931 10559 1/2 2
51240211 SCREW V.TC+AB 2,9X9,5ZNN U6954 12600 1/2 1
51310402 SCREW V.TC+SL 3,5X10 ZNN 1
51310523 SCREW V.TC+SL 4X20 ZNN 6175 1/2 16
51310545 SCREW V.TC+SL 4X40 ZNN 22
51510221 SCREW V.TC+AUTOP.DK3,5X19ZNC UNI 8118 4
51991009 SCREW V.TC+AUTOM. SW M4X10 ZNN U8112 4
51992013 SCREW V.T1/2T+SL 4X16 ZNN 34462 12
52100110 WASHER 4,3X 9ZNN U6592 6329 1/2 39
52100116 WASHER 5,3X10ZNC U6592 11618 1/2 2
52201004 WASHER 5 DIN6798 0239 2
54302001 LOCK WASHER 35059 2
83483019 POWER CORD-USA C3C83-012E003 1
83483013 POWERCORDEU 1
83483021 POWERCORDU.K. 1
Components noted with this symbol shall be replaced only by the
component specified. This is required to maintain product safety.