ART400A

Active Loudspeaker

Service Manual

2002 MACKIE DESIGNS, INC.

 ART400A Service Manual

SERVICE ON THIS EQUIPMENT IS TO BE PERFORMED BY

EXPERIENCED REPAIR TECHNICIANS ONLY

2
ART400A Service Manual

CONTENTS
Safety Instructions ........................................................... 2
Introduction ..................................................................... 4
Active Speaker Safety Test ............................................ 5
Overview.......................................................................... 7
Rear Panel ....................................................................... 8
Specifications .................................................................. 9
Parts .................................................................................. 10
Final Assembly............................................................ 10
Amplifer Assembly ..................................................... 11
Amplifier PCB Assembly ............................................ 12
Input Assembly........................................................... 14
Input PCB Assembly .................................................. 14
Transformer Assembly ............................................... 15
RCF Parts Differences ................................................ 16
Main Board Schematics................................................. 17
Crossover.................................................................... 17
Low Frequency Amplifier .......................................... 18
High Frequency Amplifier And Power Supply ........ 19
Main Board PCB Layout ................................................. 20
Input Board ..................................................................... 22
Schematics................................................................. 22
PCB Layout................................................................. 23

3
 ART400A Service Manual

Introduction

SERVICE ON THIS EQUIPMENT IS TO BE PERFORMED BY

EXPERIENCED REPAIR TECHNICIANS ONLY

About this Manual

This manual contains the basic repair information for the ART series loudspeakers. For
each model, the following information is supplied:
• Safety Information
• Overview
• Rear panel view and features
• Specifications and test details
• Parts list, containing a master parts list and sub-assembly parts
• Parts list differences between RCF and Mackie Industrial ART speakers
• Schematics
• PCB layout drawing
It is essential that you have a copy of the user’s manual as this contains the complete
operating instructions.

Service Technical Assistance

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.

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.

www.mackieindustrial.com
16220 Wood-Red Road NE, Woodinville, WA 98072 USA
TEL 888.337.7404, FAX 425.487.4337, industrial@mackie.com
UK +44.1268.571.212, FAX +44.1268.570.809 +industrial@rcf-uk.com
ITALY +39.0522.354.111, FAX +39.0522.926.208 +industrial@rcf.it
FRANCE +33.3.8546.9160, FAX +33.3.8546.9161 +rcf.commercial@wanadoo.fr
GERMANY +49.2572.96042.0, FAX +49.2572.96042.10 +industrial@mackie.de

4
ART400A Service Manual

Active Speaker Safety Test

You must perform the following leakage test before returning any active speakers 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 leakage current).
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 speaker before returning it to your customer.

5
 ART400A Service Manual

Safety First!
Before connecting and using the equipment, please read the Quick-Start Guide
carefully and keep it for future reference.

Warning
This equipment has been designed to be installed by qualified professionals only! There
are many factors to be considered when installing professional sound reinforcement
systems, including mechanical and electrical considerations, as well as acoustic
coverage and performance. Mackie Industrial strongly recommends that this equipment
be installed only by a professional sound installer or contractor.
1. Never install, connect, or disconnect the unit with the power supply on.
2. Before powering up the speaker, make sure the voltage select switch
corresponds to the AC Voltage supply.
3. Make sure the safety ground on the power cord is properly grounded.
4. To prevent the risk of electric shock, never open the unit. There are no user
serviceable parts inside.
5. To ensure normal cooling of the amplifier, make sure the unit is well ventilated.
Avoid exposure to direct sunlight or proximity to any heat source, dust, or
dampness.

Installation
A 1-3/8" (35mm) socket is provided in the bottom of the cabinet for mounting the
loudspeaker on a speaker stand.
The speaker can be suspended with approved rigging hardware. Always use at least two
M10 threaded inserts located on opposite sides of the enclosure. The speaker must be
positioned so that the weight of the enclosure is equally distributed over the two inserts.

Warning
Never attempt to suspend the ART Series loudspeakers by their handles. Consult a
professional rigger or structural engineer prior to suspending loudspeakers from a
structure not intended for that use. Always know the working load limit of the structure
supporting the loudspeaker array. Always make sure that the rigging hardware minimum
rating is at least five times the actual load.

6
ART400A Service Manual

Overview
The ART400A is a full-range two-way
professional active speaker system
that combines high power and wide
bandwidth in a light-weight enclosure
for fixed-installation systems. The
15" low-frequency transducer, in
combination with a 2" exit compression
driver coupled to an integral 80º x 60º
constant directivity polynomial horn,
form an extremely powerful package
for any small to medium-sized sound
reinforcement application.
It features a balanced XLR input with
a Mic/Line switch and a paralleled
balanced XLR output for cascading
multiple speakers. Rear panel
controls also include Music and Voice
equalization switches, a rotary volume
control, and an input limiter.
The two built-in power amplifiers
provide 300W for the LF driver and
50W for the HF driver. The enclosure
is constructed of high-strength
polypropylene with two internal 16mm
thick multilayer wood panels. It has six
M10 threaded inserts, and an integral
locking 1-3/8" socket in the bottom
for mounting on a standard speaker
stand.

7
 ART400A Service Manual
1 2 3 45 6 7 8
Rear Panel
1. INPUT is a balanced XLR input jack that
accepts mic-level or line-level signals.
2. OUTPUT is a balanced XLR output jack in
parallel with the INPUT jack, allowing the
signal to “loop through” for daisy-chaining
speakers together.
3. LINE/MIC switch for mic-level or line-level
signals at the INPUT.
4. VOICE equalization switch ON provides a
gentle boost at 3kHz and 6kHz.
5. MUSIC equalization switch ON provides a
low-frequency and high-frequency boost.
6. LIMITER indicator illuminates when the limit-
ing protection circuits are activated.
7. OPERATE indicator illuminates when the
POWER switch is turned on.
8. VOLUME control adjusts the input-stage
gain.
9. POWER switch turns the AC power on and
off.
10. AC OUTLET for connecting AC power to
an additional Mackie Industrial active
speaker system.
11. Grounding Terminal provides an additional
safety grounding point.
12. IEC AC Socket. Connect the detachable
power cord to the socket. The protection
fuse is also contained in the AC socket.
CAUTION: Replace fuse only with the same
type as indicated on the rear panel.

Connections
The XLR connectors use the following AES
standard:
Pin 1 = Ground (Shield)
Pin 2 = Hot (+)
Pin 3 = Cold (–)

8
12 11 10 9
ART400A Service Manual

Specifications
System: Amplifiers:
Freq. Range (–10 dB): LF Amplifier Power:
55Hz-19kHz 300 watts RMS
Freq. Response (±3 dB): HF Amplifier Power:
75Hz-18kHz 50 watts RMS
Horz. Coverage Angle (–6 dB): Distortion:
80° nominal < 0.1% THD at rated power
Vert. Coverage Angle (–6 dB): Amp Protection:
60° nominal Thermal, limiter, short circuit
Directivity Factor Q (DI): Power Supply:
10.5 (10.2), averaged 1kHz-10kHz 115/230 VAC, 2A, 50/60 Hz
System Sensitivity:
99 dB, 1W@1m
Physical:
Rated Maximum SPL:
125 dB @ 1 m (3.3ft) peak Enclosure:
HF Protection: Asymmetrical trapezoidal
Dynamic reinforced polypropylene
Mounting:
Lockable 1-3/8" (35mm) stand mount
Transducers: Rigging Inserts:
Low Frequency: 6 points, accepts M10 threaded hardware
380 mm (15") diameter woofer Input/Output Connectors:
High Frequency: 2 XLR balanced
51 mm (2") exit compression driver, horn Dimensions HxWxD:
loaded 29.1" x 17.9" x 14.8"
(740 mm x 454 mm x 375 mm)
Net Weight:
Preamp and Processor: 77.2 lb (35.0 kg)
Input Sensitivity:
Mic In:
8mV Testing:
Line In: DC voltages:
125mV + 78 VDC
Input Impedance: - 78 VDC
Mic In: + 34 VDC
650Ω unbalanced - 34 VDC
1.3kΩ balanced + 15 VDC
Line In: - 15 VDC
10kΩ unbalanced DC offset:
19kΩ balanced less than +/- 0.1 VDC
Crossover Frequency and Slope: Bias:
1.8kHz; 24 dB/octave At idle, into 8 ohm loads
Time Alignment: After warm up
Analog, 0.3 ms HF delay 25 mV R94
Speaker Protection: 25 mV R118
Thermal, over-excursion AC current draw:
Music Equalization: Less than 0.3 A at idle
+4.3 dB @ 65Hz
+4.0 dB @ 12kHz
Voice Equalization:
+4.0 dB @ 3kHz
+4.0 dB @ 6kHz
Indicators:
Power ON, Limiter

9
 ART400A Service Manual

ART400A Parts
13112025 ART400A Final Assembly
PART # DESCRIPTION QUANTITY NOTES

01811103 ADHESIVE M6R11-003M ......................................................................... 0.04

03606004 WOODEN SHIPPING PALLET 1200X1000 33325 ................................... 0.125
21111130 WOOFER L15................................................................................................. 1
22040930 WIRE ASSEMBLY POWER SUPPLY ................................................................ 1
23102260 ACCESSORIES ............................................................................................... 1
23102920 AMPLIFIER ASSEMBLY 115V.......................................................................... 1 SEE NEXT PAGE
23103370 INPUT ASSEMBLY ........................................................................................... 1 SEE PAGE 14
23103380 TRANSFORMER ASSEMBLY 115V.................................................................. 1 SEE PAGE 15
25110530 TWEETER N 400 ............................................................................................. 1
33090110 CENTER CABINET SECTION 33531 ............................................................... 1
33090120 FRONT CABINET 33530 ................................................................................. 1
33090180 REAR CABINET 33532 ................................................................................... 1
33093280 INPUT SECTION BOX 32759 .......................................................................... 1
33161200 WOOFER GASKET 32605 .............................................................................. 1
33161210 INPUT GASKET 32760 .................................................................................... 1
33161220 ADAPTOR GASKET 32824............................................................................. 1
33182120 REINFORCING PANEL 32784........................................................................ 1
33182130 REINFORCING PANEL 32785........................................................................ 1
33220040 PROTECTION GRILL 33413 ........................................................................... 1
33221140 WOOFER GRILL 32635.................................................................................. 1
33221160 INPUT BOARD SCREEN 32761 ...................................................................... 1
33890100 FEET 34287..................................................................................................... 4
33900090 HANDLES 33533 ............................................................................................ 2
33901270 WIRE GROMMET SEAL 32498....................................................................... 2
33901320 TWEETER ADAPTOR 32875 ........................................................................... 1
33912130 ANTIVIBRATION PIECE 22867 ....................................................................... 6
33912160 TRANSFORMER SPACERS 23128 .................................................................. 6
33921210 MOUNTING INSERT NUTS 22839 ................................................................... 4
33921480 MOUNTING INSERTS 31832 .......................................................................... 4
33921550 GRILL SPACERS 32628 .................................................................................. 4
33950280 MOUNTING INSERT HEX COVER STICKER 23495......................................... 6
33951920 TRADEMARK BADGE 34672 ......................................................................... 1
33960580 WARRANTY MOD.1712 ................................................................................ 1
33961570 INSTRUCTION GUIDE MOD.1744 ................................................................. 1
33993090 SHIPPING BOX 34679.................................................................................... 1
33995210 INTERNAL PACKAGING 32776 .................................................................... 2
33995220 INTERNAL PACKAGING 32777 .................................................................... 2
33995340 INTERNAL PACKAGING 33321 .................................................................... 2
33995390 BOX COVER 33308.................................................................................. 0.25
33995400 ANGLE 1600 33326.................................................................................... 0.5
43040390 SOUND ABSORBER FOAM SP.15 DENS.50 ................................................ 26
43900110 COVER PLUG ................................................................................................ 1
43900810 KNURLED KNOB 32243 ................................................................................. 1
43900820 GASKET 32181............................................................................................ 1.2
43900830 GASKET 32266............................................................................................... 6
51190205 Screw, cylindrical, Allen, black galv, M5 x 10 mm, U5931 ...................... 4
51190245 Screw, cylindrical, Allen, black galv, M5 x 35 mm, full thread ............... 4
51190315 Screw, cylindrical, Allen, black galv, M6 x 18 mm, U5931 ...................... 4
51240416 Screw, cylindrical, Phillips, blck galv, point, 3.9 x 16 mm,U6954 50535.. 4
51992008 Screw, cylindrical, Phillips, black galv, for plastic, 4.2 x 20 mm............ 22
51992010 Screw, roundhead, flange, Phillips, blck galv, for plastic, 4.8 x 50 mm. 8
51992011 Screw, cylindrical, Phillips, black galv, for plastic, 4.2 x 30 mm............ 20
51992012 Screw, roundhead, flange, black galv, for plastic, 4.8 x 60 mm ......... 31

10
ART400A Service Manual

PART # DESCRIPTION QUANTITY NOTES

52100101 Washer, flat, white galv, 15 x 28 mm, U6592 ........................................... 4

52100110 Washer, flat, black galv, 4.3 x 9 mm, U6592 6329 1/2.............................. 4
52100211 Washer, black galv, 4.3 x 12 mm13087 1/2 ............................................ 20
52100216 Washer, flat, black galv, 5.3 x 10 mm, U6592 50239 1/2.......................... 8
52201009 Washer, crinkle, 6 mm DIN6798 50383 ..................................................... 4
59023981 PLASTIC BAG 580+220+220X1500 ............................................................... 1
83483019 LINECORD USA C3C83-012E003 ................................................................. 1

Service Replacement Parts

PART # DESCRIPTION NOTES

21111130 WOOFER L15ART400A WOOFER

11460024 WOOFER RECONE KIT L15ART400A BOXED RECONE KIT
25110530 TWEETER ART400A TWEETER
15410084 TWEETER DIAPHRAGM M84 BOXED TWEETER DIAPHRAGM

23102920 Amplifer Final Assembly 115 VAC

PART # DESCRIPTION QUANTITY NOTES

23020420 AMPLIFIER PCB ASSEMBLY ........................................................................... 1 SEE NEXT PAGE

23103610 WIRE ASSEMBLY, TWEETER............................................................................ 1
33120210 HEATSINK 32762 ............................................................................................ 1
33120290 HEATSINK DX 33423 ...................................................................................... 1
33120300 HEATSINK SX 33424 ....................................................................................... 1
33180020 TRANSFORMER SUPPORT 33358 .................................................................. 1
33912310 INSULATING STRIP 33238 .............................................................................. 1
33950120 UL STICKER 33539.......................................................................................... 1
51150215 Screw, cylindrical, Phillips, white galv, M3 x 8 mm, U7687 50170 ......... 10
51150220 Screw, cylindrical, Phillips, white galv, M3 x 10 mm, U7687 50149 ......... 7
51150230 Screw, cylindrical, Phillips, white galv, M3 x14 mm, U7687 50175 .......... 3
51150326 Screw, cylindrical, Phillips, black galv, M4 x 14 mm, U7687 .................. 15
51180555 Screw, Hex, black galv, V.TE M8 x 75 mm, U5737 .................................... 1
52100105 Washer, flat, 3,2 x 7, white galv, U6592 5320 .......................................... 20
52100113 Washer, flat, 4,3 x 9, white galv, U6592 169 ............................................. 1
52100126 Nut, large flat, white galv, 9 x 24 mm, U6593 ........................................... 1
52201002 Washer, crinkle, 3 mm DIN 6798 11628 1/2 ............................................. 20
52201003 Washer, crinkle, 4 mm DIN 6798-A ........................................................... 15
53101005 Nut, M 3 U5588-A-6S 11625 ........................................................................ 3
53102010 Nut, M 4 U5588-A-6S 01880 1/2................................................................... 1
53301026 Nut, NYLOCK, M8 INOX ............................................................................... 1
81412044 CAPACITOR, FILM C1C12-251K105 250V10% 1U ...................................... 4
81412406 CAPACITOR, FILM C1C12-630K225 63V10% 2.2U ..................................... 2
81533020 CAPACITOR, ELECTROLYTIC C1E33-500*682 50V 6800U .......................... 4
81751097 TRANSFORMER C1T51-082A ........................................................................ 1
82175010 BRIDGE DIODE C2D75-211*402 4A............................................................. 2
83444023 FASTON CONNECTORS, MALE C3C44-013M001 ART.969/4 .................... 1
83811002 INSULATING STRIP C3A11-002 ..................................................................... 3
83811009 INSULATING STRIP C3A11-009 ..................................................................... 4
83812001 INSULATING WASHER C3A12-001 ............................................................... 3

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 ART400A Service Manual

23020420 ART400A Amplifier PCB Assembly

PART # DESCRIPTION QUANTITY NOTES

32030390 BARE CIRCUIT BOARD MR 33092-3 ............................................................. 1

32120140 HEATSINK 11755 ............................................................................................ 2
42901040 ANTISTATIC STICKER 31101........................................................................... 1
51150220 Screw, cylindrical, Phillips, white galv, M3 x 10 mm, U7687 50149 ......... 2
52100105 Washer, flat, 3,2 x 7, white galv, U6592 5320 ............................................ 2
52201002 Washer, crinkle, 3 mm DIN 6798 11628 1/2 ............................................... 2
53101005 Nut, M 3 U5588-A-6S 11625 ........................................................................ 2
81121000 RESISTOR, C1R21-251J0R0 1/4W5% 0 ....................................................... 14
81121017 RESISTOR, C1R21-251J220 1/4W5% 22........................................................ 2
81121021 RESISTOR, C1R21-251J470 1/4W5% 47........................................................ 7
81121025 RESISTOR, C1R21-251J101 1/4W5% 100...................................................... 4
81121029 RESISTOR, C1R21-251J221 1/4W5% 220...................................................... 5
81121031 RESISTOR, C1R21-251J331 1/4W5% 330...................................................... 2
81121033 RESISTOR, C1R21-251J471 1/4W5% 470...................................................... 2
81121034 RESISTOR, C1R21-251J561 1/4W5% 560...................................................... 1
81121037 RESISTOR, C1R21-251J102 1/4W5% 1K ....................................................... 7
81121039 RESISTOR, C1R21-251J152 1/4W5% 1.5K .................................................... 3
81121041 RESISTOR, C1R21-251J222 1/4W5% 2.2K .................................................. 10
81121043 RESISTOR, C1R21-251J332 1/4W5% 3.3K .................................................... 8
81121045 RESISTOR, C1R21-251J472 1/4W5% 4.7K .................................................... 5
81121046 RESISTOR, C1R21-251J562 1/4W5% 5.6K .................................................... 6
81121049 RESISTOR, C1R21-251J103 1/4W5% 10K ................................................... 12
81121050 RESISTOR, C1R21-251J123 1/4W5% 12K ..................................................... 1
81121051 RESISTOR, C1R21-251J153 1/4W5% 15K ..................................................... 3
81121052 RESISTOR, C1R21-251J183 1/4W5% 18K ..................................................... 1
81121053 RESISTOR, C1R21-251J223 1/4W5% 22K ..................................................... 2
81121054 RESISTOR, C1R21-251J273 1/4W5% 27K ..................................................... 1
81121057 RESISTOR, C1R21-251J473 1/4W5% 47K ..................................................... 2
81121058 RESISTOR, C1R21-251J563 1/4W5% 56K ..................................................... 1
81121061 RESISTOR, C1R21-251J104 1/4W5% 100K ................................................... 5
81121066 RESISTOR, C1R21-251J274 1/4W5% 270K ................................................... 1
81121073 RESISTOR, C1R21-251J105 1/4W5% 1M ...................................................... 4
81121079 RESISTOR, C1R21-501J2R7 1/2W5% 2.7 ..................................................... 4
81121734 RESISTOR, C1R21-251F1002RES.STR. 1/4W1% 10K ...................................... 8
81127123 RESISTOR, FUSIBLE, C1R27-102K100 1W10% 10 .......................................... 2
81182027 TRIM POT C1R82-002K103 10K..................................................................... 1
81231011 RESISTOR, WIRE WOUND, C1F31-202J2R2 2W 5% 2.2................................ 2
81241019 RESISTOR, WIRE WOUND, C1F41-302J3R3 3W5% 3.3................................. 1
81241114 RESISTOR, WIRE WOUND, C1F41-302K222 3W10% 2.2K ............................ 2
81241118 RESISTOR, WIRE WOUND, C1F41-302K472 3W10% 4.7K ............................ 2
81241152 RESISTOR, WIRE WOUND, C1F41-502J4R7 5W5% 4.7................................. 2
81243129 RESISTOR, WIRE WOUND, C1F43-502JR33 5W5% 0.33............................... 2
81412013 CAPACITOR, FILM, C1C12-101K104 100V10% 0.1U .................................. 1
81412021 CAPACITOR, FILM, C1C12-101K225 100V10%2.2U ................................... 2
81412044 CAPACITOR, FILM, C1C12-251K105 250V10% 1U ..................................... 4
81413001 CAPACITOR, FILM, C1C13-101K102 100V10% 0.001U .............................. 2
81413004 CAPACITOR, FILM, C1C13-101K332 100V10% 0.0033U ............................ 2
81413007 CAPACITOR, FILM, C1C13-101K103 100V10% 0.010U .............................. 5
81413009 CAPACITOR, FILM, C1C13-101K223 100V10% 0.022U .............................. 2
81413010 CAPACITOR, FILM, C1C13-101K333 100V10% 0.033U .............................. 3
81413011 CAPACITOR, FILM, C1C13-101K473 100V10% 0.047................................. 5
81413013 CAPACITOR, FILM, C1C13-101K104 100V10% 0.1U .................................. 2
81413022 CAPACITOR, FILM, C1C13-630K474 63V10% 0.470U ................................ 1
81413026 CAPACITOR, FILM, C1C13-500K224 50V10% 0.0220U .............................. 1
81421013 CAPACITOR, CERAMIC, C1C21-500K330 50V10% 33P ............................ 1

12
ART400A Service Manual

PART # DESCRIPTION QUANTITY NOTES

81421123 CAPACITOR, CERAMIC, C1C21-500J820 50V5% 82P............................... 1

81422005 CAPACITOR, CERAMIC, C1C22-500*221 50V10% 220 P .......................... 2
81422010 CAPACITOR, CERAMIC, C1C22-500*681 50V10% 680P ........................... 2
81426045 CAPACITOR, CERAMIC, C1C26-500K105 50V10% 1U .............................. 1
81511046 CAPACITOR, ELECTROLYTIC, C1E11-250*4R7 25V 4.7U............................ 1
81511049 CAPACITOR, ELECTROLYTIC, C1E11-250*470 25V47 U ............................. 6
81511072 CAPACITOR, ELECTROLYTIC, C1E11-630*010 63V 1 U .............................. 1
81511073 CAPACITOR, ELECTROLYTIC, C1E11-630*2R2 63V 2.2 U........................... 1
81511092 CAPACITOR, ELECTROLYTIC, C1E11-101*101 100V100U .......................... 1
81533020 CAPACITOR, ELECTROLYTIC, C1E33-500*682 50V 6800U ......................... 4
81632055 INDUCTOR C1L32-040A331 ......................................................................... 1
82112001 DIODE C2D12-750*151-DIODO 1N4148 ................................................... 19
82112002 DIODE C2D12-201*251-DIODO BAV21 ...................................................... 4
82122015 DIODE C2D22-101*402-DIODO MUR410.................................................... 2
82131050 ZENER DIODE C2D31-501J120-ZENER 0.5W 12V ........................................ 2
82131052 ZENER DIODE C2D31-501J150-ZENER 0.5W 15V ........................................ 3
82172012 DIODE C2D72-401*312-DI0DO MR854 ....................................................... 2
82212002 TRANSISTOR C2T12-101B450 BC560/C ....................................................... 4
82212017 TRANSISTOR C2T12-600B150- 2N5401 ......................................................... 3
82212018 TRANSISTOR C2T12-600A160- 2N5551 ........................................................ 3
82212019 TRANSISTOR C2T12-101C450- BC550.......................................................... 5
82231022 TRANSISTOR C2T31-802A151- MJE15030 .................................................... 1
82231023 TRANSISTOR C2T31-802B151- MJE15031..................................................... 1
82231028 TRANSISTOR C2T31-153B231- 2SC5200....................................................... 1
82231029 TRANSISTOR C2T31-153A231- 2SA1943....................................................... 1
82232016 TRANSISTOR C2T32-152A800- BD139 .......................................................... 1
82232020 TRANSISTOR C2T32-102B101- TIP30 ............................................................. 1
82232021 TRANSISTOR C2T32-102A101- TIP29............................................................. 1
82262005 TRANSISTOR C2T62-800A250- J108 ............................................................. 1
82262014 MOSFET TRANSISTOR C2T62-313A101- IRFP140.......................................... 1
82262015 MOSFET TRANSISTOR C2T62-193A101- IRFP9140........................................ 1
82312005 INTEGRATED CIRCUIT, C2A12-25532 -CIRC.INT. NE5532........................... 8 SEE NOTE BELOW
82322010 INTEGRATED CIRCUIT, C2A22-1*3886 -CIRC.INT. LM3886......................... 1
82512008 GREEN LED C2F12-008 -............................................................................... 2
82561001 OPTOCOUPLER, C2F61-001*5C8- VTL ........................................................ 1
83111049 FUSE, C3P11-001F252- 2.5AF ....................................................................... 2
83111053 FUSE, C3P11-001F632- 6.3 AF ...................................................................... 2
83142005 CAPACITOR, FILM, C3P42-251K224- 250V10%0.22 ................................... 1
83182005 FUSE CARRIER C3P82-005 -.......................................................................... 4
83432033 6-PIN CONNECTOR, C3C32-012M006- 6P ................................................. 1
83444020 FASTON CONNECTOR, MALE, C3C44-020M001 .........................................

FROM NOV 2002:

82312005 I.C.NE5532 has been replaced with
0004634 NJM4580

13
 ART400A Service Manual

23103370 Input Assembly

PART # DESCRIPTION QUANTITY NOTES

23020360 INPUT PCB ASSEMBLY................................................................................... 1 SEE BELOW

23102730 WIRE ASSEMBLY UL ....................................................................................... 1
33170150 INPUT MACHINED PLATE 36026 ................................................................... 1
51240211 Screw, cylind, Phillips, blk galv, point, 2.9 x 9.5 mm, U6954 12600 1/2... 4
83881020 KNOB, C3A81-020 ........................................................................................ 1
83882016 BLACK BUTTONS, C3A82-016 ...................................................................... 3

23020360 Input PCB Assembly

PART # DESCRIPTION QUANTITY NOTES

33032120 BARE CIRCUIT BOARD MR 31850-3 ............................................................. 1

52201005 Washer, crinkle, 8 mm DIN6798 176........................................................... 1
81121025 RESISITOR, C1R21-251J101- 1/4W5% 100.................................................... 2
81121030 RESISITOR, C1R21-251J271- 1/4W5% 270.................................................... 1
81121033 RESISITOR, C1R21-251J471- 1/4W5% 470.................................................... 1
81121034 RESISITOR, C1R21-251J561- 1/4W5% 560.................................................... 2
81121037 RESISITOR, C1R21-251J102- 1/4W5% 1K ..................................................... 2
81121041 RESISITOR, C1R21-251J222- 1/4W5% 2.2K .................................................. 1
81121049 RESISITOR, C1R21-251J103- 1/4W5% 10K ................................................... 3
81121051 RESISITOR, C1R21-251J153- 1/4W5% 15K ................................................... 1
81121061 RESISITOR, C1R21-251J104- 1/4W5% 100K ................................................. 1
81121073 RESISITOR, C1R21-251J105- 1/4W5% 1M .................................................... 4
81132089 RESISITOR, METAL, C1R32-501G473- 1/2W2% 47K ..................................... 4
81311074 POT, C1P11-063A503- 50K........................................................................... 1
81413001 CAPACITOR, FILM, C1C13-101K102- 100V10% 1N .................................... 2
81413005 CAPACITOR, FILM, C1C13-101K472- 100V10% 4.7N ................................. 2
81413007 CAPACITOR, FILM, C1C13-101K103- 100V10% 10N .................................. 1
81413013 CAPACITOR, FILM, C1C13-101K104- 100V10% 100N ................................ 1
81421013 CAPACITOR, CERAMIC, C1C21-500K330- 50V10% 33P ........................... 2
81421015 CAPACITOR, CERAMIC, C1C21-500K470- 50V10% 47 P .......................... 2
81521075 CAPACITOR, ELECTROLYTIC, C1E21-630*100- 63V10U............................. 2
81572003 CAPACITOR, BIPOLAR, C1E72-350*222- 35VDC20% 2.2U ........................ 1
82112001 DIODE, C2D12-750*151- 1N4148 ................................................................ 4
82312005 C2A12-25532 -INTEGRATED CIRCUIT NE5532............................................. 2
82511006 RED LED, C2F11-006 .................................................................................... 1
82512008 GREEN LED, C2F12-008................................................................................ 1
83231021 DOUBLE SWITCHES, C3S31-0210202- .......................................................... 3
83414019 CONNECTOR, MALE XLR, C3C14-017M003............................................... 1
83414020 CONNECTOR, FEMALE XLR, C3C14-017F003............................................. 1
83432033 CONNECTOR, MALE, 6-PIN, C3C32-012M006 ........................................... 1
83822029 TIE DOWN, C3A22-029 ................................................................................ 1
97123005 YELLOW WIRE 1.5 MMQ............................................................................... 8

14
ART400A Service Manual

23103380 Transformer Assembly, 115V

PART # DESCRIPTION QUANTITY NOTES

23102650 WIRE ASSEMBLY UL ....................................................................................... 1

23102670 WIRE ASSEMBLY UL ....................................................................................... 1
23102680 WIRE ASSEMBLY UL ....................................................................................... 1
23102700 WIRE ASSEMBLY UL ....................................................................................... 1
23102710 WIRE ASSEMBLY UL ....................................................................................... 1
23102720 WIRE ASSEMBLY UL ....................................................................................... 1
23102760 WIRE ASSEMBLY UL ....................................................................................... 1
33170110 TRANSFORMER MACHINED PLATE 34678 ................................................... 1
43900130 GROUND TERMINAL 33610 .......................................................................... 1
51250211 Screw, flat, CSK, Phillips, blck galv, point, 2.9 x 9.5 mm, U6955 12596 ... 4
52100113 Washer, flat, 4,3 x 9, white galv, U6592 169 .............................................. 1
52201003 Washer, crinkle, 4 mm DIN 6798-A ............................................................. 2
53102010 Nut, M 4 U5588-A-6S 01880 1/2................................................................... 2
83111142 FUSE, C3P11-003T502- 5 AT.......................................................................... 2
83242016 ILLUMINATED POWER SWITCH C3S42-016 .................................................. 1
83444023 FASTON CONNECTOR, MALE, C3C44-013M001ART.969/4 ...................... 1
83482004 RECESSED AC SOCKET-MALE, C3C82-004M003 ....................................... 1
83482006 RECESSED AC SOCKET-FEMALE, C3C82-006F0031 ................................... 1

15
 ART400A Service Manual

RCF 400A Parts

Summary of Differences
The main differences between the RCF brand and the Mackie brand ART400A are:
the rear panel silkscreens, the front badges, the shipping boxes and literature.
The following parts are used in the RCF brand ART400A. The other parts, not shown, are
the same as the Mackie model.

13110192 RCF ART400A Final Assembly

These parts differ from the Mackie ART400A final assembly:

PART # DESCRIPTION QUANTITY NOTES

23102470 INPUT ASSEMBLY ........................................................................................... 1

23102570 TRANSFORMER ASSEMBLY 115V.................................................................. 1
32960240 WARRANTY MOD.575-3 ............................................................................... 1
32962750 WARRANTY MOD.1810 ................................................................................ 1
32970150 BOX LABEL 31167 ......................................................................................... 2
33950530 SERIAL NUMBER STICKER 50487 ................................................................... 3
33955180 RCF TRADEMARK BADGE 32180 ................................................................. 1
33960810 INSTRUCTION GUIDE MOD.1673-3 .............................................................. 1
33995200 SHIPPING BOX 32775.................................................................................... 1

23102470 RCF ART400A Input Assembly

These parts differ from the Mackie ART400A final assembly:

PART # DESCRIPTION QUANTITY NOTES

33170830 INPUT MACHINED PLATE 33272 ................................................................... 1

23102570 RCF ART400A Transformer Assembly, 115V

These parts differ from the Mackie ART400A transformer assembly:

PART # DESCRIPTION QUANTITY NOTES

33950140 MARKINGS LABEL 33547 .............................................................................. 1

16
 1 2 3 4 5 6 7 8

R8 +15V
+15V 2K2

8
+15V R10 2.2K R14 5.6k IC3A
A
C11 3
A

8
+15V 100n +15V +
C7 C8 1
HIGH

8
-15V 3 47n 47n C9 C10 2

8
+ 1 -15V - NE5532
5 47n 47n
+

4
R7 C4 2 7 5 C72
1.5k 33n - + 7
IC1A 6
- 6

4
NE5532 IC2B -15V
-

4
+15V -15V NE5532 IC3B 3.3n R21
C3 NE5532

8
IC1B

4
C6 33n R6 R9 -15V D5 D4
NE5532
5 3.3K R11 -15V R23 R22 4.7K
+ 4.7K
7 R19 C15
JP1 100n 6 4.7K ? ? 1K 3.3K
- C5 +15V
1

4
2
RESISTORS 2k2
3 100n R20
-15V HERE 330
4
5 R3 12K

+
6
C14 C13
CONN\IN R2 10K C1 1u
C2 +15V R17
330

8
820p R18 56K LOW OUT
4 3 3
+ 1
2
-
IC2A

4
2 1 NE5532
R146
B +15V 4.7K C26 100n -15V B
ISO1 +15V +15V

8
T2 C28 47n NE5532 +15V

8
3 1 BC560 5 -15V R46 R47
+ 5.6k IC7B

8
7 5
R54
+ 7
5.6K R53 5.6K IC7A
R4 6 5.6k 3 NE5532
100K - + 1
R12 R39 R41 IC6B 6

2
BC550 NE5532 - 2
2K2 470 C34 C33

4
100K -

4
T3 C27 470n C25

4
1u -15V C30 R44 22n 10n C35 C32
+ T1 R145 100n 1K -15V R60
C12 BC550 +15V 22n 10n -15V R51 R50 10K 1% R59 R63 10K 1% R56 R55 10K 1% R61 10K 1%
4.7u 3K3 R48 R43 15K

8
R5 R1 3 470 10K 1% +15V 10K 1% +15V 10K 1% +15V 10K 1% +15V
+ R42 15K
1
8
8
8

IC8B IC8A IC10B IC10A

8

1M 100 -15V R49 2 C29 R4 R45

- 5532 2 5532 5532 2 5532
IC6A 220n ? 6 6
270K 3.3K 1
NE5532 7 7 1

4
5 3 5 3
-15V +15V
4
4
4

-15V -15V C36 -15V -15V

R52 R58 100n R57 R62

R13 1M D1 10K 1% C31 10K 1% C38 10K 1% C40 10K 1%

1 10n 10n 10n C39
C 10n C

R16 1M
A
R15
100K
Delay Circuit

D D

Note: Diodes which are not marked are type 1N4148 SE233092
Note: Parts marked here with a question mark are not installed
ART400A
1 2 3 4 5 6 7 8

ART400A Crossover

17
ART400A Service Manual
 1 2 3 4 5 6 7 8

18
A
D6 D7 C47
+65V
4148 4148 R87 220 1% LED GREEN
C49 R99 680
R72 D17
T21 100n
+15V 18K 2R2 3W R101

2
D14 R103 C51 BAV21
1 2N5401 T15

8
R73 4K7 1n
R71 3 IRFP140 47
5 IC9B 3.3K 3W
3.3K
A + A

2
3
6 D13 D18
- NE5532
1N4148 R102
MJE15030 1

4
R69 D12
BAV21 R88 100 15V 47
2 T22 T18

2
10K
-15V 1 2N5551 C46 D16
1 + 12V
D20
R70 R82 47u

3
1K 25V
10K R89
R64 10K R68 10K MUR460
47
+27.5V
F3
R84 6.3A
C37 220p C44 D23 NOT USED
22K
33p R96, R97, R100, R104, R105
D15, D19, D21
IC9A R90

2
T17 T14, T16, F4, C48
0

4
NE5532 T20 R93 2SC3281 (these parts are used in the more

3
BC560
2 powerful amplifier for the ART500A,
1 R78 1K5 R80 560

3
R65 10K - 2 2R7 which has the extra output transistor T16)
3 R85 1/2W
LOW + C45 L2 4uH
C42 33K R83

1
T19

8
100n
C41 100n 1 BD139 10K
B 1
T23 B
+15V -15V 2 BC550 R95
100n CFL1
LOH +
+15V 3
R66 3 2.2K
47K D22
4R7
LOW
R94 MUR410
R107
R86 0.33 5W OUT
R125 R127 C50 CFL2
R79 1 2K2 2.2K R98 5W
3 15K 10K 680 100n
MUTE T4 LOW -
J108 R92 R91
100K RTD1 47 22
2 R106
4R7

3
R124 5W
220
D37
R76 R123 R119
10K 680 22 R118
0.33 D25
D34 T24 R122 5W MUR410
3 220
1N4148 2N5551 R120
D36 2
C43 2.2K
1

+
T8 BC560 NOT USED
R81 R109, R111, R113, R115, R116
D35 3
47u/25V 10K R117 1 T10 D24, D27, D28 C64
C C
D33 2SA1302 T11, F1, C61 + D31
2R7 1/2W 2
(these parts are used in the more 12V
D11 powerful amplifier for the ART500A. 47U
D32 R121
D9 47
It has the extra output transistor T11)
R126 F2
3

T5 220 BAV21 6.3A

1
R67 -27.5V
47K 2N5401 T9
D10 MJE15031 D26 MUR460
2

R140
1
T6
2K2 3 D29
2N5551 R75 100 2 T7
C60 2N5401
3

-15V R77 100n 15V R112 R110 C63

R108 47
3

1 4K7 1n D30
2R2 3W
1K T12 3W BAV21
R114
IRFP9140 47
2

D8
R74
LED GREEN
220 1% C62
680
D -65V D

Note: Diodes which are not marked are type 1N4148 SE233092
ART 400A
1 2 3 4 5 6 7 8

ART 400A Low Freq Amplifier

ART400A Service Manual

 +65V
+ C54 C52
6800u
50V 1u/100V
CF1 AC1 R143
48Vac
CFVA 2K2
CI2 +27.5V 3W
A 21Vac A
CFVB D44 D45
BRIDGE35v
3 2 BRIDGE77V + C55 C53

+
6800u
CI3 CFgnd
TO TRANSFORMER - FROM TRANSFORMER 50V 1u/100V R142
IN V AC 0V 2 4 1 3
CFVC + -
115-230V CI4 C59 0
220n
C56

-
+ C66
1 4 6800u
CI5 21Vac 50V 1u/100V
CFVD
-27.5V
CI6 CFVA CFVE 48Vac R144
2K2
3W
+ C57 C65
6800u
50V 1u/100V
-65V

B B

T25 TIP31 R128 2.2

+27.5V -27.5V R131
2 3
+15V
+27.5V
10 1
1 Watt R129
2K2 R130
F5 F6 Fusible 4K7
2.5A 2.5A
+ C70
HIGH C71 47u 25V
C24 1

+
220P
100u/100V
T27 2
BC550

D38 R141 C68

MUTE 15V 10K 2.2u +
MUTE
C23 C22
C 2.2u 2.2u 63V 3 C
+ C67 R139 1M
2
47u 25V
1K
LM3886
D40 T29
R33 IC5 1N4148 1
D41 1N4148

6
BC560

2
C19

NC
NC
220P 10 1
+V R137 10K 1
1K Vin+ D39
R31 9 4 CFL3 1N4148 2
-V +

+
Vin- 33n T28 C69
R34 R35 C21 ADD WIRE R133 3
C16 10u 3 5
+V BC550 47u 25V
10K OUT
R30 1K 22K 100
8 11 R138 R132
MUTE NC

GND
100K 5K6
R134
7 2K2 T26
1 TIP32 R135 2.2
R38 3R3 R136 2
2W -27.5V 3 -15V
CFH2 10
1 Watt
Fusible
Hi-
Note: These parts are not used: R32
R24, R25, R26, R27,R28, R29, R36, R37, 3.3K

C17, C18, C20, High Frequency Amplifier R26A 1.5K

D D
L1, IC4, D2, CFH1
(These are used on the ART500A which D3
uses IC4 for extra power to the High Freqs)
1N4148
A

Note: Diodes which are not marked are type 1N4148 SE233092
Note: Parts marked here with a question mark are not installed ART400A
1 2 3 4 5 6 7 8

19
ART 400A High Freq Amp and Power Supply

ART400A Service Manual

20
Note: This is the same board as used in the more powerful ART500A, so not all parts are stuffed.
The ART400A uses one pair of output transistors for the Low Frequency Amplifier, the ART500A uses two pairs.
The ART400A uses one IC amplifier for the High Frequency Amplifier, the ART500A uses two.

ART400A Service Manual

 +77VDC
2SA1302 2SA1302 -77VDC
(+65VDC)
PNP PNP IRFP9140 IRFP9140 (-65VDC)
E C B E C B FET FET

B C E B C E IRFP140 IRFP140
2SC3281 2SC3281 FET FET +35VDC -35VDC
NPN NPN (+27.5VDC) (-27.5VDC)

21
ART 400A Main board ART400A Service Manual
22
ART 400A Input board

ART400A Service Manual

 ART400A Service Manual
VOLUME
POT

OPERATE
LED

LIMITER
LED

MUSIC
SWITCH

VOICE
SWITCH

LINE/MICRO
SWITCH

XLR OUTPUT

XLR INPUT

ART 400A Input board

Note:
The same input board is used on the ART300A,
ART400A and ART500A.

23