Instruction/ maintenance manual of the product DSP -A780 Yamaha
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NATURAL SOUND DIGITAL SOUND FIELD PROCESSING AMPLIFIER DSP-A780 DSP PRO LOGIC D D S S P P - - A A 7 7 8 8 0 0 CONTENTS PRECAUTIONS & SAFETY INSTRUCTIONS ....................Inside Front Cover SETUP & ADJUSTMENT ................................
1 Read Instructions – All the safety and operating instructions should be read before the unit is operated. 2 Retain Instructions – The safety and operating instructions should be retained for future reference. 3 Heed Warnings – All warnings on the unit and in the operating instructions should be adhered to.
1 1 1 To ensure the finest performance, please read this manual carefully. Keep it in a safe place for future reference. 2 Install your unit in a cool, dry, clean place – away from windows, heat sources, and too much vibration, dust, moisture or cold.
2 Congratulations! Y ou are the pr oud owner of a Y amaha Digital Sound Field Processing (DSP) System—an extremely sophisticated audio component. The DSP system takes full advantage of Y amaha’s undisputed leadership in the field of digital audio processing to bring you a whole new world of listening experiences.
1-1. GETTING ST AR TED Unpac king If you ha v en’t already done so , carefully remo v e this unit and its accessories from the box and wr apping material.
● When you notice that remote control oper ation has become erratic , or the distance from which the remote control will function has decreased, it’ s time to replace the batteries. Alw a ys replace all batteries at the same time. ● This remote control uses an adv anced, highly directional infr ared beam.
This Dolby Pro Logic Surround Decoder emplo ys a digital signal processing system. This system improv es the stability of sound at each channel and crosstalk between channels , so that positioning of sounds around the room is more accurate compared with conv entional analog signal processing systems .
Setting Up Y our Speaker System This unit has been designed to provide the best sound field quality with a full fiv e-speak er system setup , using one e xtra pairs of eff ect speak ers to gener ate the sound field plus one center speak er f or dialog, when using Dolb y Pro Logic Surround decoding.
Speakers and Speaker Placement Y our full fiv e-speaker system will require tw o speak er pairs: the MAIN SPEAKERS (y our normal stereo speakers) and the REAR EFFECT SPEAKERS , plus the CENTER SPEAKER. Y ou ma y also be using a subwoof er . Y ou will probably use y our present stereo speak ers as the MAIN SPEAKER pair .
8 1-2. SETUP Bef ore you star t making connections make sure all related electronic components are turned OFF . REAR P ANEL SINGLE DUAL SINGLE 10dB 0dB - To AC outlet 12 3 7 45 6 89 0 A (General Model.
1 A udio Signal Connection J ac ks (f or A udio Source Equipment) Connect the inputs and/or outputs of y our audio equipment. 2 A udio/Video Signal Connection J ac ks (f or Video Source Equipment) Connect the audio and video inputs and/or outputs of y our video equipment.
10 GENERAL INSTR UCTIONS FOR CONNECTIONS Make sure that y ou hav e the left (L) and right (R) channels correctly connected. That means that jac ks marked “L ” on this unit must be connected to jac ks marked “L ” on other units. Lik e wise with the “R” jacks .
CONNECTING T O S VIDEO J A CKS If your video cassette recorder , video disc pla y er , etc. and your monitor are equipped with “S” (high-resolution) video terminals, connect them to this unit’ s S VIDEO jac ks , and connect this unit’ s S VIDEO MONIT OR OUT jac k to the “S” video input of y our monitor .
CONNECTING SPEAKER SYSTEMS Connect the SPEAKERS terminals to your speakers with wire of the proper gauge, cut as shor t as possible . If the connections are f aulty , no sound will be heard from the speakers . Mak e sure that the polarity of the speaker wires is correct, that is , + and – markings are obser ved.
13 CONNECTING THE MAIN SPEAKERS AND THE REAR EFFECT SPEAKERS T O THIS UNIT Connect the MAIN speak ers to the MAIN SPEAKERS terminals of this unit. Connect the REAR eff ect speak ers to the REAR SPEAKERS ter minals of this unit. CONNECTING THE CENTER SPEAKER(S) T O THIS UNIT Connect the CENTER speak er to the CENTER SPEAKERS ter minals.
14 For connecting two CENTER speaker s ADDING A SUBW OOFER Y ou may wish to add a subw oof er to reinf orce the bass frequencies. This unit provides a line-le v el subw oof er output, which contains only the frequencies under 200 Hz from the main and center channels.
ADDITIONAL INFORMA TION ON CONNECTING SPEAKERS (f or Europe, U .K. and A ustralia models) This unit is equipped with line output jac ks f or main, rear eff ect and center channels. If you will use an e xternal power amplifier f or driving main speakers , connect input jac ks of the e xternal power amplifier to the MAIN OUTPUT jac ks of this unit.
16 1-3. CONTR OLS & ADJUSTMENTS FR ONT P ANEL 1 P o wer Switch * ST ANDBY Mode (Europe model only) While the pow er is on, pressing the PO WER k ey on the remote control unit s witches the unit to the ST ANDBY mode. (In this mode, the indicator is half illuminated.
5 PRO LOGIC Indicator Illuminates while the b uilt-in Dolb y Pro Logic Surround Decoder is being activ ated. 6 DSP Indicator Illuminates while the b uilt-in Sound Field Processor is being activ ated. 7 Input Selector Switch Sequentially selects the input source that you w ant to listen to and/or watch in the § § or © © direction.
REMO TE CONTR OL UNIT 1 P o wer K e y T ur ns this unit on and off . * (Europe model only): T ur ns the PO WER on mode to the ST ANDBY mode and vice versa. 2 CD Function K eys Operate functions on Y amaha CD play ers designed f or remote control compatibility .
8 Set Menu/P arameter Select K eys Select DSP program par ameters or titles of settings/adjustments in the SET MENU mode, or used in the main/center/eff ect speaker le v el balance adjustment. 9 T uner Function K e ys Operate functions on Y amaha tuners designed for remote control compatibility .
1-4. ADJUSTMENT MAIN/CENTER/REAR EFFECT SPEAKER LEVEL B ALANCE ADJUSTMENT This operation uses an internal test-tone generator f or balancing the le v els of the main, center and rear eff ect speak ers . All speak ers should be adjusted to the same apparent sound le v el f or proper Dolby Pro Logic decoding.
21 INPUT LEVEL ADJUSTMENT This adjustment is impor tant for obtaining the best perf ormance from the inter nal circuits of this unit. The optimum input le v el of this unit is pre-adjusted on the basis of the CD source le v el.
O THER IMPOR T ANT SETTINGS AND ADJUSTMENTS IN THE “SET MENU” MODE The f ollo wing f our types of settings and adjustments should be done bef ore enjo ying audio and video sources . Note that these settings and adjustments cannot be done without monitoring the displa y inf ormation (or the information display ed on the monitor screen).
3. Changing brightness of the display (DIMMER) Y ou can select one of the five le v els of brightness of the displa y . 4. Locking DSP parameter s and other adjustments (MEMOR Y GU ARD) If you wish to pre v ent accidental alter ation to DSP par ameters or other adjustments on this unit, select “ON”.
24 2-1. PLA YING A SOURCE 1. Set the MASTER V OLUME control to minimum. 2. T ur n the power on. 3. Select an input source. (The selected source is shown b y the displa y panel, the monitor screen and illumination of the corresponding indicator o v er the input selector s witches .
25 T o recor d an input sour ce to be pla y ed 1. Press the REC OUT s witch (so that “REC OUT ... ” appears on the displa y and the monitor screen).
26 T o recor d a sour ce other than the input sour ce to be pla yed This unit has a function of selecting a source to be recorded to tape deck or VCRs independent of the selection of input source . 1. Press the REC OUT switch (so that “REC OUT ... ” appears on the displa y and the monitor screen).
NO TE: Adjusting the MASTER V OLUME, BASS , TREBLE controls , etc., or selecting a sound field progr am has no eff ect on the material being recorded. NO TE: Composite video and S video signals pass independently through this unit’ s video circuits .
2-3. DIGIT AL SOUND FIELD PROGRAMS This unit has 16 progr ams f or digital sound field processing, 4 from actual acoustic en vironments from around the world, and 12 programs f or A udio/Video sources including sources encoded with Dolby Pro Logic surround.
29 2-7. DESCRIPTIONS OF THE SOUND FIELD PR OGRAMS The f ollo wing list giv es brief descriptions of the sound fields produced by each of the DSP prog r ams. K eep in mind that most of these are precise digital recreations of actual acoustic en vironments .
5. CONCER T VIDEO: This program produces an enthusiastic atmosphere and lets y ou f eel that y ou are in the midst of the action, as if attending an actual jazz or roc k concer t.
9. TV THEA TER: The data of the sound field of a relativ ely narro w space is used f or the front presence side. A moder ately siz ed spatial sound field without e xcessiv e sound e xtension and re v erber ations giv es reality to the characters in a dr ama.
32 13. 70 mm MO VIE THEA TER 1: This program is ideal f or precisely reproducing the sound design of the new est mo vies . The sound field is made according to the design of the new est mo vie theaters , so the re v erberations of the sound field itself are restrained as m uch as possib le .
33 3-1. SELECTING AND EDITING PR OGRAM P ARAMETERS WHA T IS A SOUND FIELD? In order to e xplain the impressiv e functions of the DSP system, we need to first understand what a sound field really is . What really creates the rich, full tones of a live instrument are the multiple reflections from the w alls of the room.
Each sound field progr am has a set of parameters that allo w y ou to change the characteristics of the acoustic en vironment to create precisely the eff ect y ou w ant. These par ameters correspond to the many natur al acoustic f actors that create the sound field y ou e xperience in an actual concer t hall or other listening environment.
35 3-2. DESCRIPTIONS OF THE DIGIT AL SOUND FIELD P ARAMETERS Not all of the f ollo wing par ameters are f ound in e v ery program. ● INIT DL Y (Initial Delay) How it Aff ects the Sound: Changes the apparent distance from the source sound.
36 ● REV . TIME (Reverberation Time) How it Aff ects the Sound: The natural re v erberation time of a room depends primarily on its size and the char acteristics of its inner surf aces . This parameter , theref ore , changes the apparent siz e of the acoustic en vironment ov er an e xtremely wide r ange .
37 PROBLEM POSSIBLE CAUSE WHAT TO DO Power does not come on. AC cord not properly plugged in. Carefully plug AC plug into outlet. Hum. Bad cable connection. Firmly plug in all connection cables. No sound. Bad or incorrect input connection. Check connections.
38 Minimum RMS Output Power Per Channel Main (20 Hz – 20 kHz 0.015% THD 8 Ω ) [U.S.A. and Canada models] ............................................................. 65W+65W [Australia, Europe, U.K. and General models] ...........................
39 Video Section Video Signal Type [U.S.A. and Canada models] ..................................................................... NTSC [Australia, Europe and U.K. models] ............................................................ PAL [General Model] .
YAMAHA ELECTRONICS CORPORATION, USA 6660 ORANGETHORPE AVE., BUENA PARK, CALIF. 90620, U.S.A. YAMAHA CANADA MUSIC LTD. 135 MILNER AVE., SCARBOROUGH, ONTARIO M1S 3R1, CANADA YAMAHA ELECTRONIK EUROPA G.m.b.H. SIEMENSSTR. 22-34, D-25462 RELLINGEN BEI HAMBURG, F.
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