Mackie ART300A User manual

ART300A
Active Loudspeaker
Service Manual
2002 MACKIE DESIGNS, INC.

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ART300A Service Manual
SERVICE ON THIS EQUIPMENT IS TO BE PERFORMED BY
EXPERIENCED REPAIR TECHNICIANS ONLY

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ART300A 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 Board Assembly and PCB...............................14
RCF Parts Differences................................................15
Main Circuit Board..........................................................16
Schematics
Crossover ..............................................................16
High Frequency Amplifier....................................17
Low Frequency Amplifier.....................................18
Power Supply........................................................19
PCB Layout.................................................................20
Input Board......................................................................21
Schematic..................................................................21
PCB Layout.................................................................22

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ART300A Service Manual
Introduction
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.
SERVICE ON THIS EQUIPMENT IS TO BE PERFORMED BY
EXPERIENCED REPAIR TECHNICIANS ONLY
www.mackieindustrial.com
16220 Wood-Red Road NE, Woodinville, WA 98072 USA
TEL [phone], FAX [phone], [email protected]
UK +44.1268.571.212, FAX [phone] [email protected]
ITALY +39.0522.354.111, FAX [phone] [email protected]
FRANCE +33.3.8546.9160, FAX [phone] [email protected]
GERMANY +49.2572.96042.0, FAX [phone] [email protected]

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ART300A Service Manual
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.
Active speaker safety test