DM-6 Installation and Service Manual
Contents
1. DB25F 6 CHANNEL BUSS AIN e C L LEFT EQ She ees we 6 I e OC Q d wid E RLY3 DTS RS n BET CENTER EQ Sth lace OR SUB iran rll BLS N C R RIGHT EQ Se RRS t N C RLY6 t L vho LS sm 2 St Ce whe L SURR EQ She B s os R we RS 57c LS we R SURR EQ Rok RELAYS RS vk a Ara SUB nes SUB 2 SUB EQ S gt C DIGITAL GAIN STAGES BUSS SWITCHES Vaia D N STADES L R 2 Jumpers around EQ cards OUTPUT CARD k a O INPUTS INPUT CARD on motherboard if customer SUR doesn t want eq s S J1 J6 S OPTICAL INPUTS RiGee ENARE ICN A DGT ENABLE ADIS CLOSED PDO IG OPT SELECTION DTS ad vv are H s OPT oa CONTROL Seca et LeveL amp sypassi e cv de de de oe DIG IPAS OBEN DETECT kev E rva oe ays rive a ae pa OPT s 1 1 1 1 1 1 15V_IN DIGITAL y PUSHBUTTONS RE O V IN OPTICAL 4 SWART DEVICES INC rae SCALE DATE APPROVED DRAWN BY FORMAT CARD N A 4 19 94 OLN COMMENTS DRAWNGF DIG1BLOK Operation Normally there is no operator intervention required to use the DM 6 except to initially set the volume and to manually go to bypass during certain types of failures The DM 6 is running under the com mand2. Made Kight in the AMSA Installation and Service Manual DM 6 Digital Cinema Sound Adapter THEATRE SYSTEMS 5945 Peachtree Corners East Norcross Georgia 30071 1 800 45 SMART or 404 449 6698 Digital Magic Model DM 6 Digital Sound Adapter Digital Magic a 4 Thumb screws will allow the front panel to be removed This is generally done only one time duirng installation The SMART Model DM 6 Digital Magic Digital Sound Controller is an interface unit designed to connect the audio outputs from digital signal pro cessors such as the DTS or Dolby DA20 to an exist ing sound system It does not matter what stereo processor you are now using The outputs from your stereo processor are simply disconnected from the amplifier inputs and re connected to the Optical Inputs on the DM 6 The DM 6 outputs are then connected to the amplifier inputs The DM 6 will then pass either the optical signals or the signals from the digital processor to the amplifiers All switching is automatic and there are manual as well as automatic fallbacks to the optical processor should the digital system or the DM 6 fail The DM 6 has been made as failsafe as possible Once the film is running the operator does not have to do any switching except in certain types of failures Block diagram shows overall signal flow
3. i cal ey Rm Chg ay 7 C8 R26 R34 R6 A O lea a a cau i La bitr 4 cer oa amp i R cis ce O O ERR 3 x R 27 6 fare z nj Trimpots on the OUTPUT CARD allow final level matching the first set of digital inputs will be set for DTS lev els If you hook a DA20 up to the first set of digital inputs i e you are connecting to the first or only DB25 on the DM6 you will probably have to ad just the Sub Bass level upward using the Sub Bass trimpot on the DM6 Input Switching Card to accomodate the lower Sub Bass level from the DA20 If you must make adjustments to the factory set tings on the DM 6 then use the trimpots on the INPUT SWITCHING card first The top row of trimpots is for the DTS DB25 inputs and the bot tom row of trimpots is for the DIGITAL INPUTS ter minals If this still does not give proper levels then use the OUTPUT card trimpots to get additional range of adjustment The optional sub bass equalizer card allows smoothing of the subwoofer system seperately from the stage channel equalizers Output Card This card contains theVCAs and output gain stages The trimpots are used to vary the output signal lev els which will feed the power amps Do not adjust these unless the digital processor level controls will not give sufficient level If necessary set the
4. EQ FORMAT CARD OUTPUT CARD DUAL ONE OCTAVE EQ FOR SURROUND CHANNELS The first model of the DM 6 had on DB25 connector wired for the DTS system SAMIR 02200000000000 ay 000000000000 DIGITAL MAGIC SIGNAL PROCESSOR CAUTION NO USER SERVICEABLE PARTS INSIDE NO VOLTAGES OVER 40 VOLTS REFER SERVICING ONLY TO QUALIFIED SERVICE PERSONNEL DTS INPUTS SURR URR Y H SND UB SMART SERIAL NUMBER The first production run of the DM6 has one DB25 connector on the rear panel This may be used for either the DTS or DA20 connection with the ap propriate cable although the labeling on the front panel pushbuttons indicates this input as the DTS The other digital input is labeled DIG on the front panel pushbuttons If both DTS and DA20 proces sors are being used on the same DM6 the the DA20 will have to be wired to the input terminal strip on the DM6 while the DTS will plug into the DB25 The second production run has anadditional DB25 socket on the back of the p roduct so that plugging in both the DTS and the DA20 simultaneously will be possible without having to wire directly to the terminal strips Now wire the digital processor outputs and control lines to the appropriate inputs on the rear of the DM 6 If you are using the DTS System and have ordered the DTS to DM 6 cable from SMART it is only necessary to plug the c
5. of the digital processor and changes between digital mode and optical stereo are initiated by the digital processor If the digital processor no longer sees a valid digital signal or timecode then it will tell the DM 6 to go to Optical mode If the digital processor or DM 6 fails but does NOT automati cally go into optical mode then the operator needs to push the optical button on the DM 6 front panel If this still does not correct the problem then the operator must throw the toggle switch on the DM 6 front panel to the bypass position This will force the DM 6 into optical mode regardless of what the lighted pushbuttons are telling you Installation Locate the DM 6 close to the stereo processor and the digital processor There are 3 cable sets which may be ordered with the DM6 One cable set is for connecting the DTS digital system to the DM6 and the other 2 are for the Dolby DA20 These cables are about 30 inches long so keep this in mind when selecting a location Also install any additional power amps if needed at this time e g for split surrounds The existing rack wiring harness may have to be extended or re wired to accomodate the locations of the processors and to make new con nections for any new amps Install the power sup ply in the bottom of the rack and bring the power supply wiring harness up to the top left terminals amaia INPUT CARD ONE OCTAVE EQ 3 SMART DEVICES INC DIGIB308 DIGITAL 1 LEVEL
6. 20 end This cable set allows easy plug in o p eration The 2 DB25 s on the DA20 end plug into the Audio and Control connectors on the DA20 DM6 DA20 2 Fanning strip for terminals on DM6 end to 2 DB25 s on DA20 end The 2 DB25 s0_ n the DA20 end plug into the Audio and Control con nectors on the DA20 Please refer to the DA 20 manual for other wiring considerations In particular the Motor Start con nector must be jumpered from Pin 1 to Pin 5 This is explained in the DA20 Manual Zz a 5 pins from the top of the Pink Noise Card on the component side In this configuration the surround switch on the Pink Noise Card will feed LS and RS simultaneously so you will have to turn the LS Amplifier channel down while EQ ing the the RS channel and vice versa Next play the test disc or film and set the audito rium levels as recommended by the digital proces sor manufacturer Please note that the DM 6 has several points in the signal path where the gain may be adjusted However it is suggested that you make all level adjustments on the digital processor itself and only use the internal trimpots on the DM 6 if a normal level cannot be obtained he EE POR RRR EE ts ea E i i wi DM 6 shown with 1 3 octave stage channel equalizers Setup It is necessary to feed pink noise at a 0 5 volt level into each digital input in order to properly set the EQ Feed each channel and set the house EQ as y
7. S ca m eg R100 R101 et Re R3 R5 Rige R25 R103 U6 u2 R104 i 1 SUBI RS1 LS1 Rt CI 16 15 R1a5 14 13 v OG an oF R106 R26 R107 cee 3 3 oF R24 i R1 Re F R2 7 R 21 R110 R188 o O C105 a a4 R189 A 7 oe a ae ae R111 SUB2 RS2 LS2 Re Ce L2 DIGITAL 2 LEVELS yf LO O The input card has two sets of input level controls for each of two digital sources This allows you to match the levels between the players on the DM 6 Please note that the PlusVoltage lead is red the Minus Voltage lead is yellow and the Ground lead is black Do not connect the leads in correctly as damage could result Disconnect the outputs from the stereo processor which go to the power amp inputs These leads to the power amps will now connect to the output ter minals of the DM 6 Add any new leads as needed for additional power amps Make a new wiring harness which will connect the outputs of the stereo processor to the OPTICAL IN PUTS on the top left terminal strip on the rear of the DM 6 Please observe standard wiring practice i e use 2 conductor shield cable and ground the shield at one end only SUB BASS
8. able in and all con nections are made for you This cable DM6 DTS has a DB50 plug on one end which plugs into the mating connector on the DTS The other end has a DB25 plug which plugs into the DB25 receptacle on the rear of the DM 6 If you are wiring a Dolby DA20 connections will be made to either the DIGITAL INPUTS terminals on the bottom right terminal strip or to the DB25 connector on the rear of the DM 6 The 2 DA20 cable sets are configured as follows The current models have two DB25 connectors One is wired for the DTS system and the other is for the Dolby DA20 eeste Ja ja coeccceccece9 Je DIGITAL MAGIC SIGNAL PROCESSOR REFER QUALIFIED SERVICE PERSONNEL DTS INPUTS DA20 INPUTS DIGITAL INPUTS ae Ie gt a 4 T SURR CONTROL TER Sl EFT GND ENTI RIGHT GND ae RIGHT GN A CEI LE SERIAL NUMBER REMOVED Mz The DTS system is active when the front panel DTS button is lit The Dolby DA20 is active when the DIGITAL light is lit TRhe OPTICAL button may be pressed to return to the backup optical soundtrack when necessary Additional digital inputs are provided for other systems The signals are connected to the individual terminals of the barrier strip The DB25 for the DA20 is wired in parallel with the input terminal strips DM6 DA20 1 DB25 on DM6 end to 2 DB25 on DA
9. e oh MOR SO CESCE6 C67 78 MOD4B324 R82 R81 R8 R79 R78 R77 R76 R75 R32 R31 R3 R29 R28 R27 R26 R25 l 8K 63 125 63 125 25 500 1K 2K 4 Dual one octave EQ card for split surround channels Top set of pots is Left surround channel Frequencies are printed on the edge of the card for each band Special factory made 3 foot cords are available for the DTS 6 channel system and the Dolby DA20 Digital These cords have a pre wired DB 25 on one end and fit the specific digital decoder on the other end All control and audio signals are carried by the cord and no additional wiring is required These cords may be ordered by your SMART dealer Cords may be extended when extra length is required by purchasing a standard com puter cable with a DB25 on each end Make sure the cord has all pins wired Some computer cords do not
10. ou normally would for an optical stereo proces sor The easiest place to inject the Pink Noise is at the Digital Inputs Terminal Strip on the rear of the DM6 If you have already made connections to the terminals then just unplug the cable at the DTS or DA20 Now you can feed these inputs with no load ing on your Pink Noise source After EQ is done on all channels just re plug the connectors Alternatively you can use your Smart Pink Noise Generator card plugged into the left end slot to set the EQ First remove the Input Switching Card and then plug in the Pink Noise card It is neces sary to remove the Input card because if both were plugged in simultaneously both cards would be fighting for control of the signal buss Please note that the original Pink Noise card does not have LS and RS outputs It is necessary to modify the pink noise card so that the one surround channel feeds LS and RS Simply add a jumper wire from Pin 4 to Pin 5 on the Pink Noise Card These are 4th and 5th Please note that the DA20 Sub Bass output is 10 dB lower than the stage channels The Sub Bass chan nels on the DM6 Input Switching card have suffi cient range to accomodate this lower level The fac tory settings on the DM6 will already be set to com pensate for this lower level on the second set of digital inputs The factory settings on the DM6 for C13 ice e 4 pe RIs Ct co OE i cue Co T Reo oR ga to R15 p
11. se while the test disk or film is running to achieve the film level recommended by the digital processor manu facturer Input Switching Card This card receives the six audio channels from the digital processors and switches the appropriate source to the DM 6 signal path It also contains trimpots to adjust the signal levels if needed These trimpots will not normally require re adjustment from the factory settings except for the Sub Bass level as mentioned in the SETUP section Equalizer Card The card shown is the full octave EQ card Please note that only the top half of the card is used for the stage channels Both top and bottom sections are used for the split surrounds The top is Left Surround and the bottom is Right Surround This same card is also used for the optional SubBass EQ but fewer parts are installed Optional 1 3 octave EQ cards may be installed for stage channels IZc C182 C184 183 C1 Ul o U u3 250 500 1K 2K 4K BK QoL Omo C108 7 YR C101 JOL OL Qi O OC 3 C107 CI R63 67 o so ho hol N N N yl il Io ot t2 F J R N O SMART_THEATRE 0 Os af I Ds OO N O SYSTEMS 5 ped tee e
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