smarttech.com/docfeedback/171200 SMART Audio 400 classroom amplification system INSTALLATION AND MAINTENANCE GUIDE FOR SCA-400
Trademark notice SMART Board, smarttech, the SMART logo and all SMART taglines are trademarks or registered trademarks of SMART Technologies ULC in the U.S. and/or other countries. All third-party product and company names may be trademarks of their respective owners. Copyright notice 2017 SMART Technologies ULC. All rights reserved. No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system or translated into any language in any form by any means without the prior written consent of SMART Technologies ULC. Information in this manual is subject to change without notice and does not represent a commitment on the part of SMART. This product and/or use thereof is covered by one or more of the following U.S. patents: www.smarttech.com/patents 06-2017
Important information Federal Communication Commission interference statement This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: 1. This device may not cause harmful interference, and 2. this device must accept any interference received, including interference that may cause undesired operation. This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense. Radiation Exposure Statement This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance of 20 cm between the radiator and your body. This transmitter must not be co-located or operated in conjunction with any other antenna or transmitter.
Installing the SMART Audio 400 classroom amplification system Typically, you install SMART Audio on a wall in a classroom or meeting space. See the SMART Audio 400 installation instruction (smarttech.com/kb/171183) for more information. Installation considerations for SMART Audio 400 classroom amplification system SMART provides cables that should be long enough to wire a classroom. If the installation requires longer cables, choose good quality cables. Do not mount the receiver in an enclosed space (such as within a cabinet or the teacher's desk or the space above the acoustic tiles in a ceiling). If the receiver is installed in a confined space, the signal can be weakened when it passes metal or walls, potentially leading to interruptions of the audio. Installation considerations for the speakers SMART recommends installing up to four 8Ω speakers. o o Install any number of speakers as long as the total impedance is 4 8 Ohms. Installing more speakers doesn t make the sound louder but it does spread the sound throughout the room. Make sure there is at least 6' (1.8 m) between the wall speakers and interactive display or interactive flat panel. The closer the teacher microphone is to the speakers, the more likely audio feedback can occur. Make sure the speakers are installed at least 6' (1.8 m) above the ground. The installation height should align with height of the interactive display or interactive flat panel typically.
Pairing the microphones The microphones won t work unless they re paired to the receiver. To verify that if the teacher microphone is paired to the receiver, press the microphone s PWR/MUTE button for 1 second. If the BATT LED flashes green, the microphone is paired. If the BATT LED flashes in another color, turn off the microphone and use the following instructions to pair the microphone to the receiver. To verify that if the student microphone is paired to the receiver, press the microphone s PWR / LINK button for 1 second. If the BATT LED flashes green, the microphone is paired. If the BATT LED flashes in another color, turn off the microphone and use the following instructions to pair the microphone to the receiver. Pairing the teacher microphone To pair the teacher microphone 1. If the teacher microphone is turned on, turn it off by pressing and holding the PWR/MUTE button for three seconds. 2. On the receiver, press the LINK button. The LINK LED flashes yellow. 3. On the teacher microphone, press and hold the PWR/MUTE and REC buttons. A beep is heard through the speakers. The BATT LED on the microphone and the LINK LED on the receiver light green to indicate successful pairing. Pairing the student microphone to the receiver To pair the student microphone 1. If the student microphone is turned on, turn it off by sliding the TALK switch down. The BATT LED is unlit. 2. On the receiver, press the LINK button. The LINK LED flashes yellow.
3. On the student microphone, press and hold the PWR / LINK button and the TALK button. A beep is heard through the speakers. The BATT LED on the microphone and the LINK LED on the receiver light green to indicate successful pairing.
Maintaining the microphones The teacher and student microphones contain a rechargeable lithium-ion battery. Charge the microphones every night and over the weekend. Charging the microphone To charge the teacher or student microphone 1. Connect the wall charging adapter to a power outlet. 2. Connect the USB cable to the adapter. 3. Connect the USB cable to the microphone. The CHG LED flashes red while the microphone charges. The CHG LED shines solid red when the microphone is fully charged. Cleaning the microphone To clean the teacher or student microphone Spray skin-safe disinfectant on a cloth and use the cloth to clean the microphone. CAUTION Make sure no cleaning liquid enters the microphone. Gently wipe the silk screened labels.
About DIP switches SMART Audio 400 classroom amplification system s DIP switches control options for the receiver. DIP switch functions CAUTION Do not change the DIP switch settings unless directed to do so by SMART support. DIP switch number Feature Default setting Function 1 Microphone Override On The microphone override switch is used when the an audio input is connected to the receiver's Line in L/R 3.5 mm audio jack. If this switch is ON, the audio input level is lowered automatically when the teacher speaks into the microphone. 2 Tone On/Off On The Tone On/Off switch controls the indicator tone heard when the teacher uses the volume controls on the microphone. When this switch is set to ON, the indicator tones are present in the mix/line output. 3 Tone level High/Low Off (Low) The Tone level High/Low switch controls the volume level of the indicator tone. When this switch is ON, the level is set to High. When this switch is OFF, the level is set to Low. NOTE The Tone level control applies only when DIP switch 2 is in the ON position.
DIP switch number Feature Default setting Function 4 Microphone/Line Mix 5 Feedback Blocker On Off The Microphone/Line Mix switch controls how the receiver sends audio signals. If this switch is set to OFF, the receiver outputs three discreet audio signals on three separate lines. If this switch is ON, the receiver outputs all three signals on the Mix output line. This switch controls the Feedback Blocker, which prevents feedback when the system volume is too high. If the switch is turned ON, the Feedback Blocker is active. NOTE Use the Feedback Blocker only after exhausting all other troubleshooting options for preventing feedback. 6 Remove volume Off This DIP switch should be set to OFF at all times. It controls a feature used only with control systems, and SMART Audio does not support control systems. 7 Mix Out Attenuator 8 RF transmitter power On Off The Mix Out Attenuator decreases the output level from the receiver by 10 db. If the switch is ON, the output is attentuated (decreased) by 10 db. To increase the level by 10 db, turn this switch OFF. When this switch is OFF, the system uses Low power, which is adequate for typical classroom coverage. Turn this switch ON to use the High power setting, which provides greater coverage for a larger-than-usual classroom.
Troubleshooting SMART Audio 400 Use this information to troubleshoot issues with the SMART Audio 400 classroom amplification system. Resolving issues with the microphones Issue The microphone is turned on and paired to the receiver, but MIC1 or MIC2 LED is not lit. The BATT LED is flashing green or orange. The BATT LED is flashing yellow. The BATT LED is flashing red. Solutions Check the pairing again. See Pairing the microphones on page 5. Microphone is muted. Unmute the microphone. The microphone is pairing to a receiver. Wait for the microphone to finish pairing with the receiver. Microphone is out of range of the receiver. Move back into range. There was a pairing error with the receiver. Try pairing the microphone again. See Pairing the microphones on page 5. Resolving issues with audio Issue All components are turned on and the microphones are paired, but there is no audio. Solutions On the microphone, check for the audio from the AUDIO IN port, and then from the MIC IN port. If the audio is working from both ports and but not from the internal mic element, the microphone may be defective. Contact SMART for a replacement. Check the connection from the receiver to the speakers. If the speakers are firmly and properly connected and there is still no audio, contact SMART regarding the receiver.
Issue Solutions The audio is distorted. If a device is connected to the teacher or student microphone using the AUDIO IN port, set the device s volume to 80 90% of its maximum volume. Then use the volume controls on the teacher microphone to adjust the volume. Turn on dip switch 8 on the receiver. Test the microphone from the malfunctioning system with a properly functioning system. If the audio is still distorted, contact SMART regarding the microphone. Test a microphone from a properly functioning system with the malfunctioning system. If the audio is still distorted, contact SMART regarding the receiver. There is audio feedback. NOTE Feedback occurs when the microphone picks up audio from the speakers and transmits it to the speaker again in a loop. Feedback sounds like an intermittent highpitched squealing or burst of sound, and it can occur when you stand in a particular spot (especially if the microphone is very close to the speakers) or randomly in a room. Feedback is distinct from a buzzing or humming, which is a constant low noise that doesn t necessarily change when the microphone is used or turned on or off. Volume is set incorrectly. Set the volume while standing beneath the speaker with the microphone. TIP Have someone else in the room help determine if the volume is not loud enough. Do not stand directly beneath the speakers. This can cause feedback. TIP Have someone else in the room help determine if the volume is not loud enough. Turn on dip switch 5 on the receiver. This will mute your microphone if a feedback loop starts. There is an audible hum. Verify that the cables are connected properly. The speaker cables may be running parallel with power lines. Don t run cables parallel to power lines. Use only good quality cables for input. Make sure no cables are longer than 25' (7.6 m).
Issue The speakers are making a crackling sound. Solutions The speakers and the receiver aren t connected properly. o o If the crackling sound is coming from all the speakers, check the connection at the back of the receiver. If the crackling sound is coming from only one speaker, check the connection at the back of the speaker. Audio is interrupted. Flip dip switch 8 on the receiver to boost the signal. Remove metallic obstructions between the receiver and the microphones. You re experiencing other issues with audio or the solutions above don t resolve the issue. Refer to this article in the SMART knowledge base for additional audio troubleshooting. Resolving issues with power Issue Solutions The receiver isn t receiving power. Test the outlet with a device known to be working correctly. Try a different outlet. If neither solution resolves the issue, contact SMART. Resolving issues with battery charging Issue Solutions The microphone isn t charging. Make sure the charging cable is inserted correctly in the AC adapter and in the microphone. Make sure the cable is oriented correctly in the microphone. The arrow should face out towards the microphone.
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