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Shure AVC20 manual

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Table of contents for the manual

  • Page 1

    Owner's Manual VIDEO / HI-FI SYSTEM EXPANDER 222 HARTREY AVENUE EVANSTON, ILLINOIS 60202-3696 U.S.A TELEPHONE (312) 866-2200 CABLE SHUREMICRO[...]

  • Page 2

    NOTICE The AVC20 offers the choice of three different types of surround-sound effects: Dolby Surround, Spatial Surround, or Concert Surround. The AVC20 is equipped with Four Power amplifiers. The AVC20 allows central control of most video equip- ment. 4 types of easy to operate volume balance controls. The AVC20 is equipped with a sound memory circ[...]

  • Page 3

    SURROUND-SOUND EFFECTS Surround-sound The AVC20 is equipped with three types of surround processors which provide a sense of presence and expan- sion. 4 Every day, we are exposed to sounds coming from our ) surroundings. Some sounds reach our ears directly from the source, some indirectly reflected off of walls or the ceiling. Sounds of voices reac[...]

  • Page 4

    LOCATING SPEAKERS Speaker location will depend in each case on the size and shape of the specific room in which the Home Theater System is installed. The diagrams below may be used as a general guide to speaker placement in rooms of various shapes. To avoid interference with the tv picture, speakers without special magnetic shielding should ordinar[...]

  • Page 5

    CONNECTION OF SPEAKERS Connection of 4 Speakers OPERATE SWITCH +I MONO OUT I I Normally this switch is SPEAKER AC OUTLET Monophonic Output kept to the left (seen OUTPUT (SWITCHED) Terminals from behind). TERMINALS There is one set of four speaker output terminals. Use speakers with an impedance of 8 to 16 ohms. Connection of Speaker Cables Normal S[...]

  • Page 6

    FUNCTION NAMES AND OPERATIONS-FRONT PANEL Function Names and Operations @ Power Switch (POWER) Use this switch to turn the power of the AVC20 on and off. After turning on, allow approximately 4 seconds to pass before using. During this time, the FULL MUTE indicator on the concen- trated indicator panel will flash, indicating that the set is in the [...]

  • Page 7

    DOLBY This is the best position for viewing SURROUND movies. 0 The AVC20 is equipped with the proper Dolby Surround decoder for use especially with video software con- taining the DOLBY SURROUND mark 00 ,,,,,,~ ,,~,,,,,, ,,( '" or movies in which the DOLBY STEREO rnark~OImre*m~mI'"appears at the end. The Dolby Surround system is[...]

  • Page 8

    FUNCTION NAMES AND OPERATIONS-REAR PANEL Function Names and Operations @ A-V INPUT 1 Input/Output Terminals @ A-V INPUT 2 InputIOutput Terminals A-V INPUT @ and @ Input/Output Terminals are used for connection of components on which recording is possible, such as a video deck. @ A-V INPUT 3 lnput Terminals A-V INPUT@ lnput Terminals are used for co[...]

  • Page 9

    @ Operation Selector Switch Use this switch to select NORMAL or Balanced Transformerless (BTL) operation. NORMAL Operation 0 Use this position for independent operation of the four power amplifiers. 0 This is the position in which the AVC20 is normall y used. 0 In this position, the AVC20's output is 30W x 4. BTL Operation 0 Use this position [...]

  • Page 10

    VOLUME-BALANCE CONTROL The AVC20 is equipped with 4 built-in power amplifiers. The volume of each of these can be controlled separately. Volume Control m Press the upper side to simultaneously increase the volume of all four speakers. Press the lower side to simultaneously decrease the volume of all four speakers. IvoLuME Volume increases faster th[...]

  • Page 11

    USE OF WIRELESS REMOTE CONTROL A variety of operations are possible from a comfortable distance when, using the wireless remote control unit. Remote Control Sensor .When using the wireless remote control, always point it toward the remote control sensor on the AVC20. This wireless remote control unit uses infrared rays. Exposure of the sensor on th[...]

  • Page 12

    1. SURROUND-SOUND EFFECT SELECTION The AVC20 provides a choice of 3 surround effects, depending upon the program or software being viewed. For programs for which the surround effect is not nece- ssary, such as news broadcasts, press the BYPASS but- ton. Sound can be heard from the front speakers only. -1- Press this button for movies, etc. 1-1- Pre[...]

  • Page 13

    4. Use of the Preset Volume Buttons It is possible to place in the memory three different volume adjustment settings. When the optimal adjustment is reach- ed as shown in number 3 above, press the STORE button. (There is no need to keep it pressed in.) When this is done, the PRESET VOLUME indicators ( , I, and ( )on the AVC20 will flash. While the [...]

  • Page 14

    USE OF THE IMAGE ENHANCER SWITCH Use of the IMAGE ENHANCER Switch The lrnage Enhancer function is very effective for cleaning up fuzzy pictures, or when watching foreign films, making movie subtitles clearer. The switch works in three steps: .......... 0 3 dB (decibels) For lesser effect. ......... 0 6 dB (decibels) For greater effect. 0 OFF. .....[...]

  • Page 15

    APPLICATIONS (1) Balanced Transformerless (BTL) Mode The AVC20 has a built-in 4-way 30W amplifier system, but by switching to BTL operation, it can be used as a 2-way 6oW amplifier system. BTL . . . Balanced Transformerless Switching CAUTION TURN OFF AVCZO POWER BEFORE OPERATING I BTLSWITCH. I Adding Amplifiers in the BTL Mode Adding amplifiers whi[...]

  • Page 16

    Connection (6) @ To use the AVC20 on the two rear channels and use the two front channels with an added amplifier, change the U-shaped short pins as shown in the diagram. @ Connect the FRONT-PRE OUT terminals to the input terminals of the other amplifier using pin plug cables. @ Use the outside speaker terminals for the Rear speakers. @ When this i[...]

  • Page 17

    (2) Using as Surround Processor The AVC20 can be used by disconnecting both the front and rear pre-amplifiers and main amplifiers. To use the AVC20 as a surround processor with different main amplifiers, remove the four short pins as shown in the diagram, and use pin cords to connect the PRE OUT termi- nals to the input terminals of the other ampli[...]

  • Page 18

    Center Speaker Center Speaker Center Arnpl~f ier SPEAKER (3) MONO OUT Many audio/video systems are set up with a television centered between two speakers. Sometimes, however, if the speakers are located far away from the tele- vision, the resultant center localization can become confusing. To provide better center localization, connect one of the A[...]

  • Page 19

    (4) Connections for "Use of WI Input/Output Terminals - Example 1" AVCZO Connections Color Monitor Lm/ Video Deck IHiFil Video Disc Player (etc.) I m Audio Output Terminal - From Video Output To Video Input Terminal To Audio lnput Terminal AVCZO From Monitor Output Terminal I To Tape lnput Terminal Audio Component (Compact Disc Player, Ca[...]

  • Page 20

    EXAMPLES OF USE WITH A VARIETY OF DIFFERENT EQUIPMENT (Monophonic Video Deck) As shown in the diagrams below, video signals are supplied to the television through the antenna line, and audio signals pass through the AVC20 to produce sound from the speakers. Turn down the TV Volume whenever the AVC20 amps are used. Antenna Antenna Line ---* Audio Si[...]

  • Page 21

    EXAMPLES OF USE WITH A VARIETY OF DIFFERENT EQUIPMENT (Stereo Video Deck) USE OF INPUT SELECTOR SWITCHES SOURCE SELECTOR SWITCH DISPLAY Mono MONO Off Mono SYNTHETIC STEREO Stereo BYPASS [m Stereo CONCERT SURROUND r . - g..l -_I I Stereo SPATIAL SURROUND stereo DOLBY SURROUND Television VHF Antenna UHF Antenna pxial 1 I I I r -- J - - - 3 7- Cable S[...]

  • Page 22

    EXAMPLES OF USE WITH A VARIETY OF DIFFERENT EQUIPMENT (Two Video Decks) First, decide which deck is to be used primarily. In the axample below, a stereo video deck is used as the primary deck, while a monophonic video deck is Uxed as the secondary deck. The monophonic video deck's video signals pass through the AVC20 into the LINE input termin[...]

  • Page 23

    EXAMPLES OF USE WITH A VARIETY OF DIFFERENT EQUIPMENT (Video Deck and Video Disc Player) The video disc player's video signals entering the AVC20, are sent from the AVC20 output terminals to the video deck's LINE input terminals, and then from the video deck's VHF terminal to the televi- sion. - - - - - - - - - - - - - - - - - - . - [...]

  • Page 24

    EXAMPLES OF USE WITH A VARIETY OF DIFFERENT EQUIPMENT (TV Equipped with Video lnput Terminal) This combination brings out the best in the AVC20. Output from all audiolvideo equipment is input to the AVC20, the video signals are sent from the Monitor Output Terminal to the television's Video lnput Terminal, and the audio signals are sent to the[...]

  • Page 25

    EXAMPLES OF USE WITH A VARIETY OF DIFFERENT EQUIPMENT (Overall Connections) Connect equipment for playback and recording, such as a video deck, as below for best results. Connect equipemrnt for playback only, such as a TV tun(( video disc kplayer, here for best results. EX: Video Disc Player Color Monitor or TV with Video Input Terminal Color Monit[...]

  • Page 26

    CAUTIONS ON USAGE For Safety Power Source Connect to a household power ac outlet. Power Cord Do not bend or twist the power cord or place heavy objects on top of it. A damaged cord may result in fire or electric shock. Do Not Open Do not remove the cab~net, as this is both dangerous and could damage the AVCZO. Leave inspection and service to author[...]

  • Page 27

    SPECIFICATIONS Symptom = Power does not come on No sound or picture is produced No sound is produced No SURROUND is produced Amplifier Section Rated Output (all channels driven, Main Amplifier Input) In Normal Operation ........ Front ..... 30W + 30W (20 - 20 kHz 8 Ohm) ...... Rear 30W + 30W (20 - 20 kHz 8 Ohm) In BTL Operation ...... 60W + 60W (20[...]