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INTERNAL AUDIO SYSTEM

FEDERAL COMMUNICATIONS COMMISSION

AND INDUSTRY CANADA

RADIO FREQUENCY INTERFERENCE STATEMENT

Class B Digital Device. 

This equipment has been tested and found to comply

with the limits for a Class B computing device pursuant to Part 15 of the FCC
Rules. These limits are designed to provide reasonable protection against
harmful interference in a residential installation. However, there is no
guarantee that interference will not occur in a particular installation. This
equipment generates, uses, and can radiate radio frequency energy, and, if
not installed and used in accordance with the instructions, may cause harmful
interference to radio communications. If this equipment does cause harmful
interference to radio or telephone reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct 
the interference by one of the following measures:

Reorient or relocate the receiving antenna.

Increase the separation between the equipment and receiver.

Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.

Consult an experienced radio/TV technician for help.

Caution:

Changes or modifications not expressly approved by the party
responsible for compliance could void the user’s authority to operate the
equipment.

To meet FCC requirements, shielded cables and power cords are required 
to connect this device to a personal computer or other Class B certified device.

This digital apparatus does not exceed the Class B limits for radio noise emission from 
digital apparatus set out in the Radio Interference Regulation of Industry Canada.

Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites
applicables aux appareils numériques de la classe B prescrites dans le Règlement sur le brouillage
radioélectrique publié par Industrie Canada.

TRADEMARKS

Any other trademarks mentioned in this manual are acknowledged to be the property 
of the trademark owners.

Содержание AC470A

Страница 1: ...support 24 hours a day 7 days a week Call 724 746 5500 or fax 724 746 0746 Mail order Black Box Corporation 1000 Park Drive Lawrence PA 15055 1018 Web site www blackbox com E mail info blackbox com OCTOBER 1994 AC470A Internal Audio System Internal Audio System MIN MAX AMPLIFIER DIRECT CD INPUT SOUND BOARD PC SPEAKER MIN MAX ...

Страница 2: ...wing measures Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult an experienced radio TV technician for help Caution Changes or modifications not expressly approved by the party responsible for compliance could void the user s authority...

Страница 3: ...osure Amplifiers Built in 4W 10W direct driven Power 12 VDC from the PC Size 1 7 H x 5 7 W x 7 9 D 4 3 x 14 5 x 20 1 cm Weight 1 5 lb 0 7 kg 1 Specifications WARNING Permanent or temporary hearing loss or impairment may result from excessive amplification of the sound through the headphone jacks Before wearing any headphones please hold them away from your ears to prevent any injury from unexpecte...

Страница 4: ...you better frequency response and volume control Can be used with third party sound boards to capture display and edit audio waveforms Convenient front panel access to headphone output and microphone or CD input jacks Independent left right volume controls Direct Driven Amplifier selection PC Speaker Sound Board selection 2 2 Your Package Includes Unpack the Internal Audio System from its original...

Страница 5: ...ccurate assistance if you have a complete description including The nature and duration of the problem When the problem occurs The components involved in the problem Any particular application that when used appears to create the problem or make it worse 2 5 Shipping and Packaging the Unit If you need to transport or ship your Internal Audio System We recommend that you use the original packaging ...

Страница 6: ...o stereo output from your own headphones or earphones 3 Left LED This LED is frequency modulated and flashes during audio output 4 Amplified Direct Driven Selection Switch A This switch allows you to amplify the audio input through the Internal Audio System s built in amplifier or be directly driven by an external amplifier 5 Left Volume Control Controls the audio output level to the left speaker ...

Страница 7: ...ce as input Figure 3 2 Back Panel Connectors 10 Sound Board Stereo Input This input accepts audio that comes from your sound board and can be internally amplified by the Internal Audio System 11 PC Speaker Input Mono Use this input to divert audio output from your PC Speaker to the Internal Audio System 12 Power Input Connector This connector accepts your PC s standard internal power plug and prov...

Страница 8: ... unit into the 51 4 inch disk bay in your PC You may have to apply slight steady pressure to seat the unit completely in the disk bay Step 3 Skip to Step 5 if your PC does not have a sound board Find a vacant slot opening in the back panel of your PC and remove the existing metal blanking panel if any Insert the Metal Bracket with the attached colored stereo cables provided with the Internal Audio...

Страница 9: ...ure 4 2 Connecting the Metal Bracket to a Preinstalled PC Sound Board Back Panel View Step 5 Find an unused internal power plug located inside your PC and plug this into the Power Input Connector on back of the Internal Audio System See Figure 4 3 Step 6 Plug the black cable from the Metal Bracket into the Microphone Stereo Output jack on back of the Internal Audio System Plug the green Metal Brac...

Страница 10: ...r the right or left prong of the PC motherboard connector labeled SPEAKER See Figure 4 3 NOTE You can verify whether you ve attached to the correct SPEAKER prong by listening for an amplified beep after you switch on power to the computer Step 9 If you do not hear the beep repeat Step 7 but attach the Mono Cable motherboard connector to the opposite end SPEAKER prong S P E A K E R 10 INTERNAL AUDI...

Страница 11: ... housing cover Then switch on power to the computer Step 10 Check the front panel LEDs on the Internal Audio System to ensure that they re lit If they aren t remove the cover from your PC and confirm that all the Internal Audio System connections have been made and that the connectors are properly seated If the LEDs still don t light call Black Box for technical support ...

Страница 12: ...DIO SYSTEM 5 Operating Modes Use Action Switch A Switch B Microphone CDInput Receive audio from the sound board Easy front panel access to an external sound source Applications requiring better audio output than that provided by your PC s internal speaker Voice annotation using third party sound boards Allows non amplified sound to be received at the back panel if Metal Bracket is installed Source...

Страница 13: ...rted LEDs aren t lit Volume up too high Bad or incorrect connections Input level from sound card or other external sound source is too low Connections are loose Switch A is set to DIRECT when input is driven by sound card Sound source is not present Switch B is not set to SOUND BOARD In Connection to the internal PC power source may not be secure Reduce the volume Make sure that all connections ar...

Страница 14: ...1000 Park Drive Lawrence PA 15055 1018 724 746 5500 Fax 724 746 0746 Copyright 1994 Black Box Corporation All rights reserved ...

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