installation instructions
Contents
1. The Dual Projector Preamp Card has two solar cell preamplifier gain controls marked L1 G etc and two slit loss correction controls marked L1 42 8 D Riz HF etc for each projector There is sufficient gain o 3 ee eee sO BS SLLIS i 7 built into the preamps for narrow slit optical sound o Ul C6 ES 5 A N GO R cit shay 5 lenses when the exciter lamp is run at 80 of its rated R14 R i E R g amp eL 5 rie H value The card is silk screened to make it easier to see R9 a epe sf sean i RiP the location of each preamplifier gain and slit loss cor R52 a a J OU Ris cis esa rection control pot cea auz R51 O N R48 BQ Nd 00 J h Rag 9 F M R19 Rea c10 33 C14 C13 BZA e5 c OR ae MONO BACKUP CARD PO et acg zA MOD2x305 r Q z S Re EO g H The MONO BACKUP card provides t2. process makes If the 3 D feature is activated the but Jumper H3 A SR Jumper H2 em em Z O O OPT DEF SRS ton will remain lit all the time but the 3 D action is only used in Mono mode and only if the option al 3 D Mono card has been installed Without the optional 3 D Mono card the 3 D button has no effect in Mono mode In Stereo Digital and Music modes the 3 D ce SMART DEVICES B390 o ko Zz N C1 i SW1 C11 C10 OQO R8 c16 R9 og O O O action is not part of the signal processing DUAL PROJECTOR PREAMP CARD MOD4x300 O a 5 oO SMART DEVICES MD2BA392 a u iid There are two stereo solar cell preamplifiers in the MODIIB Each preamplifier channel is REMOTE equipped with slit loss correction The Stereo optical preamplifiers on this card increase the mono ae incoming level from the stereo solar cells Electronic changeover circuitry between stereo pairs GEN grota is built on the card to allow use in dual projector booths If the MODIIB is installed in a single pi rusz projector booth leave the second projector inputs unconnected aL mus
3. offer a system that has a sound quality second to none SECTION 2 FEATURES FADER CONTROL To begin the MODIIB has one FILM LEVEL fader that controls the overall playback level for all six channels This master fader is used as the volume control for all formats except music mode The master music level MOD II C 6 Channel Cinema Stereo Processor control is located behind the front panel on the Format Card FORMAT SWITCHING The formats available on the MODIIB are Mono 3 D Mono Stereo A Film SR Digital and Music All for mats may be manually controlled by green pushbut tons on the front panel Format Card The pushbuttons are lighted with internal LED s to indicate which for mat is selected The indicator LED s can be seen from a distance so it is not necessary to be near the proces sor to verify the status Format switching is also possi ble by connecting an automation or remote switch contacts to the FORMAT SELECT terminals on the back of the MODIIB SOLAR CELL INPUTS The MODIIB has stereo solar cell inputs with electron ic changeover for two projectors Each pair of stereo cell inputs is a quasi balanced circuit which helps to reduce any interference pickup on the solar cell leads DIGITAL INPUTS The MODIIB is fully compatible with popular digital formats i e DTS Dolby Digital etc The MODIIB will easily process the stage split surround and sub woofer channels from an external digital deco
4. 125 250 500 1K 2K 4K 8K 16K frequencies are cut and boost 10 dB with single turn trimpots also Remove the MATRIX CARD from its slot and set it aside Plug the PINK NOISE CARD into the MATRIX CARD slot Make sure the NORMAL CHOO CHOO switch is in the NORMAL position Turn on the appropriate switch on the PINK NOISE CARD for the channel you wish to equalize Perform the equaliza tion see diagram 3 and then adjust the output trim pot on the OUTPUT MUSIC CARD so that 79 dBC spl is measured in the auditorium Do this for the five main channels Left Center Right Left Surround amp Right Surround If more gain is needed then the gain pot on the stage EQs can be used which gives an additional 6 dB of gain However do not boost the gain on the EQ cards unless s 4 x z z EME ZIR TOEN IEA FOLNE 6520 The optional 1 3 octave EQ card it is absolutely necessary The optional 1 3 octave stage channel equalizers in the MODIIB allow the same tuning results obtained in professional room tuning filter sets used in high end sound playback applications Sound contractors learned a long time ago that boosting frequency bands adjacent to bands that are cut introduce a phase shift that the ear is very sensitive to Although the test instruments show a nice curve the sound has a col oration that is not natural For this reason we encour age you to apply the minimum amount of boost and cut whenever needed Never ov
5. Digital Time Delay Card MOD5x325 page 26 Output Music Card SRS5x330 page 27 MODIIB Power Supply RPS 20 page 28 3 D Mono Card SRS5x305 page xx 15
6. cell red to the corresponding LEFT projector 1 input terminal of the MODIIB Connect the wire from the right solar cell green to the RIGHT projector 1 input terminal The common solar cell lead black should be connected to the NEUTRAL projec tor 1 input terminal and the shield of the cables should be connected to a GROUND terminal Be sure to cut off the shield at the projector end so that a ground loop is not created Only the shields on the MODIIB end of the cable should be grounded It is good practice to tape or shrink wrap the end of the shielded cable at the sound head to prevent any stray shield wires from grounding out to the sound head case If you have a second projector repeat the above steps except hook your solar cell wires to the projector 2 inputs DOUBLE CHECK your work to see that the solar cell leads arrive at the proper terminals A reversal of leads will cause very strange results You may hear the center channel information through the surround speakers the surround through the stage and the left channel out of phase with the right This is a common 8 error so verify correct wiring before proceeding CHANGEOVER WIRING OF DUAL PROJECTOR PREAMPS Changeover between projectors is done electronically in the MODIIB This necessitates that BOTH exciter lamps be lit at the same time No exciter light changeover is provided in the unit An exciter light changeover has at least 3 dB more circuit noise than an
7. electronic changeover and is NOT recommended in high quality systems Projector changeover is accomplished by using only a single pair of wires and either a manual switch or relay contacts in the automation system A relay clo sure in the automation equipment will execute a changeover by grounding the CHNG OVER terminal Run a 2 conductor shielded cable to the dry contacts of the automation projector changeover relay On the other end connect one wire to the CHNG OVER ter minal on the MODIIB Ground the other wire to the nearest ground terminal on the MODIIB Connect the shield of the wire on the MODIIB end to a ground terminal Cut off the shield on the automation end When the automation relay closes PROJECTOR TWO of the MODIIB will be enabled and the first pair of stereo preamplifiers PROJ ONE will be disabled Releasing the relay will cause the reverse action to occur In other words PROJ ONE is always ON until the CHNG OVER terminal is grounded The CHNG OVER terminal must be held low to activate PROJ 2 It is not a pulse input MUSIC INPUT The non sync music inputs for the MODIIB feature a special music matrix decoder that separates in phase and out of phase signals on a standard two channel recording CD player or tape and creates four chan nels of auditorium music Connect your stereo music source to the MUSIC LEFT and MUSIC RIGHT inputs on the back of the MODIIB Occasionally a theatre may use a m
8. four channels S required for normal stereo mode 408 u6 Bi u4 US xg R pe oe te cy There is a surround null adjustment trimpot on the r Os i 25 S Matrix Card which the installer can adjust to mini D6 J pren R38 i g mize surround channel crosstalk without disturbing Q sneer Tuearee everene Ft the input signal calibration settings of the preamplifier O O ale MD O and noise reduction circuits GLRE u3 A a We OPTIONAL 1 3 OCTAVE EQUALIZER CARDS rea ntl S Uso ot mi MOD4x320 Bo u E Z m s 00 a Hl f CD CD R140 Three one third octave room tuning equalizers can be i co Z OEY specially ordered or added later for the front stage R3 S Ss KOG 5 td an h R11 Cla at speakers Left Center and Right Each adjustable fre mn Ls cor io ml oii 3 quency band in the stage EQs may be cut or boost 10 aq be Fee se a ne o Lou dB A 6 dB gain adjustment is also on each card For a S ALA ui C Za 0 overall unity gain leave the gain pot in the CCW posi B Se sa e gis tion For unity gain on each of the frequency band Se oe nr 2 S Add naana a eee SM CES H adjustments leave the pot in the mid position All aed eer ne nooued 0 4c gt R aA E LO pots are the single turn type P sa 58 WO Se U Eg a S 3 A J Sel ONE OCTAVE EQUALIZER CARDS MOD4x324 ne as wG DE aG DE os G 2 G 2 KG 200 aG p0
9. g Ca azi cy R2 Co oc 1a cs 2 c z a COO il a or C n27 Coy nzn Ca na OF M Ta R X z O8 He e Q O O iD iD u ee 5 MODZC305 MOND BACKUP The two LED arrays on this card are used to monitor the levels of various points in the circuitry These are used during calibration for setting preamp levels and also during normal operation for monitoring other levels DIP switches on the card select what will be monitored There are five DIP switches The top two switches 5 amp 4 control the top LED array The bottom three DIP switches 3 1 control the bottom LED array A DIP switch to the right means that it is on and the corresponding LED array will indicate the selected channel or output Only two DIP switches should be on at one time one for the top LED array and one for the bottom LED array All other DIP switches should be set to off to the left E uG BS LED 1 foredio ras TEGA va monau po F EEEE ett Ce gVeYo TETE orses 000080 Ago gt s S000 g Fii n ta ih MD2Bx374 Note In order to make the overall appearance of the MODIIB look symmetrical as viewed from the front the LED s on the Meter Card were moved to the sol s pen der side Because of this the Meter g 3 Nutt Card will have to be removed any E2 RPRE time it is necessary to remove the left MML 1 S Buss Noise Reduction Card If not then the LED s on the Meter Card wil
10. 0 wG os aG Jo wG oJis wG 2 0 63 Ce Js vG DA C R82 R81 R88 R79 R78 R77 R76 R75 R32 R31 R30 R29 RES R27 R26 RES This card is the standard EQ for the Stage Channels and ahg Lets and Right ouground Channels There is 63 125 250 500 1K 2K 4K 8K 63 125 250 500 1K 2K 4K 8K 6 Va Os A S AS d CES mg pi AS 5 4 aa w D E lt P i 4 gt f R L l ot MM asi t lt gt S SMART MOD4C317 MATRIX R DNR THRESHOLD U11 R128 R129 no gain adjustment pot on the one octave EQ card For the stage channels only the top eight trimpots are stuffed and used on each EQ card For the surround channels one 1 octave EQ card is configured as a dual channel card The top eight trimpots are for Left Surround and the bottom eight trimpots are for Right Surround see dia gram DIGITAL TIME DELAY CARD MOD5x325 The digital time delay portion of the MODIIB system is contained on this card The surround channel passes through the time delay whenever any Stereo Optical format is selected by the operator Music or digital inputs are NOT time delayed There is a rotary switch on this card that is used to set the time delay setting The rotary switch has 16 positions 0 9 amp A F Position 0 is 10 milliseconds of delay which is the mini mum delay setting Each position clockwise adds 10 millisec
11. 5 SECTION for specific pinout designation Another application of the Digital Input terminals is for external sync sources Sound Interlock from a 35 mm reproducer or a single 16 mm projector may be fed into the DIGITAL INPUTS and selected with the front panel DIGITAL program switch on the MODIIB Format Card REAR CHASSIS DB25 CONNECTOR The computer type DB25 connector marked DIGITAL INPUTS on the back of the processor is for an external digital decoder SMART provides the proper cables for the different digital decoders available on the mar ket See below for specific pinout configuration The DIGITAL DB25 inputs Pin1 Left Pin3 Center x a ASR N C 6 OQ cnD Al O 9S 9O pic usc cnD SMART MOD IIC STEREO PROCESSOR co mMono BACKUP MAIN PS MAIN PS oe NO USER SERVICEABLE PARTS INSIDE NO VOLTA OVER 40 VOLTS REFER SERVICING ONLY TO QUALIFIED SERVICE PERSONNEL z S A rd Q z 1c REM SEND LEFT SURR RIGHT SURI SUB GND a Ege 466 ro 8 8 8 8 8 8 FORMAT SELECT MAIN OUTPUTS Job INSTALLATION amp OPERATION Pin5 Right Pin6 Left Surr Pin7 Right Surr Pin8 Sub Pin 12 Digital Select Pin 13 Stereo A Stereo SR Default Pin 14 25 Ground see Default Optical Selection below DEFAULT OPTICAL SELECTION External digital decoders available on the market have a function that instructs the proces
12. 9 R63 R72 7915 7815 REO Rea CO R73 1 L R65 Cag C31 o LO fry LO h T Rean is 3 R62 R61A bod Oc systems the Power Supply is mounted on the floor of the rack and the rack mounted processor is placed at eye level for easy visibility of the system operation status Make sure that the processor is not immediately adjacent to hum producing components Run the factory sup TB2A 1 DIGI 13 O Of A0 Q 1 A 1 a 1 A 1 A 1 a 1 lA 1 A 3 B B IB B IB iB 3 c 3l c 3l c 3l Ic 3 e a Ic 3 Ic D D D ID D ID ID 5 E 5 E 5 E s E s E 5 E 5 E F F F IF F IF F 7 H 7 H 7 H 7 H 7 H 7 H 7 H J J J a J J J 9 K J Kk 9 Kk 9 k 9 k 9 Ik 9 K L L L L l IL L 1 m 1 mM 1 M 1 M 1 Mi M 11 M N N N IN IN IN IN 13 P 13 P 13 P 13 P 13 P 13 IP 13 P R R R IR R IR R x x z ja a Z be i v e fs i Fa I gt in E3 la a ga Zau Em ty by ey N o 5o uo ipa ao Ico o Ear Ear bain Ha an ir fey TB4 Ce e E a E EQ CENTER TBL J3 INSERT Ja FoR O CHASSIS GROUND 1 la 1 lay a 1 la 1 la B IB B IB B 3l c a Ic 3 c 3 Ic 3 c D ID D ID D 5 E 3 E 5 E 5 E 5 E F F F F n F 7 H 2 H 7 H 7 H s na 7 H J J J J H J 9 k 9 k 9 k 9 K 9 K L L L L L 1 not M 1 1 IM Bs ea In IN IN N IN ef ce IN 13 P 13 P 13 lig 13 IP 13 P R R R R zeL s 79Lis R x gt z z k Z a amp lo a g 5 A z s w Ru in fa od o5 Fara 55 55 fni fete z8 Bin ae p
13. Film Tech The inf or mation contained in this Adobe Acrobat pdf file is provided at your own risk and good judgment These manuals are designed to facilitate the exchange of infor mation related to cinema projection and filmhandling with no warranties nor obligations fromthe authors for qual ified field service engineers If you are not a qual ified technician please make no adjuatments to anything you may read about in these Adobe manual downloads www filmtech com Copyright 1995 by SMART Devices Inc 5945 Peachtree Corners East Norcross GA 30071 1337 Table of Contents SECTION 1 INTRODUC TION sierussintauttiaanacanerpancidesenniudssmipdiseacsiiuundonnunts 2 SECTION 2 FEATURES cder ce re panee EEEE A E A 2 SECTION 3 CARD DESCRIP TION ssseseeseesseseeerrsesreserrrrrerrrresseeee 3 SECTION 4 INSTALLATION vesccisicasuicaticsatincarsunbacndareenrelsadscnnanaianenwenneiaeen 8 WIRING HOOKUP INSTRUCTIONS eceeeeeee eee eee eee ee 8 SECTION 5 CALIBRATION siacciisccnrispecatsaiavaiiantaniaieiiavadanemabeimmiatitadnis 10 A CHAIN CALIBRATION iisesaccacentartcescnsendsacsesaneaneamssendcenns 10 B CHAIN CALIBRATION ceeeeeeeeeeeeeeeeeeeeee a 12 SECTION 6 OPERATING INSTRUCTIONS tt assctcnessecccasncnctrcrsmnamonisnne 14 SECTION 7 SCHEMATICS sarrosioiacinir ct sanosiisauastsxnntesedeuniulionerieartexcrants 15 SMART products are designed to deliver unsurpassed quality in workmanship and perfor mance The following i
14. MART Systems guide The Sound Systems should be turned on for at least one hour before alignment All doors should be closed and the exhaust fan should be run ning if the MODIIB is placed in an equipment rack Note Before plugging or unplugging cards in the MODIIB during calibration be certain power is removed from the MODIIB Otherwise damage to cards or the processor may result EQUIPMENT REQUIRED Sound Pressure level meter real time analyzer RTA with a calibrated microphone dual trace oscilloscope multimeter a tuning wand and appropriate test loops A CHAIN CALIBRATION The A chain is usually considered to be the signal path 10 originating from the solar cell and continuing to the processor s master fader This signal path includes the preamp noise reduction and matrix stages PRELIMINARY 1 Clean soundhead optics exciter lamp optical lens and solar cell before attempting a soundhead align ment 2 Set exciter lamp voltage for at least 80 of rated voltage BXM 9 volt 4 amp 7 2 volts BXN 10 volt 5 amp 8 volts Most foreign 6 3 volt 4 amp 5 volts 3 Make sure film cell spacing is approximately 1 mm with the slit image striking the top one third of solar cell 4 Connect oscilloscope and real time analyzer to the Left and Right Preamp outputs on the rear terminals of the MODIIB marked LEFT PRE amp RIGHT PRE 5 Locate the Gain and Slit Loss controls on the Preamp Card Turn Gain contr
15. NULL reading Select the STEREO A button on the Format Card Adjust the SURROUND NULL trimpot on the Matrix Card until a minimum number of LED s are lit on the bottom LED array of the Meter Card A good null is when only two or three LED s are lit This setting is crucial because a good null means minimum crosstalk in the surround channel For normal operation leave switch es 2 amp 5 on to the right and all others off The most likely cause of difficulty in obtaining a good null is the azimuth alignment of the optical sound lens This is a very critical soundhead adjustment if you expect to get the best performance BYPASS Run a film soundtrack Listen to the CENTER channel on the booth monitor Switch from Normal to Backup the switch on the Format Card and adjust the backup level pot on the Mono Card to achieve equal levels while switching from Normal mode to Backup mode This completes the A Chain and BYPASS calibrations B CHAIN CALIBRATION The B chain calibration is generally considered to be the signal path from the processor s master fader to the speakers This signal path includes the equalizers and output stage Before continuing with the B Chain calibration check the wiring of all auditorium speak ers to make sure the phase is correct The SMART EZ Phase Checker is a perfect unit for verifying proper phase of speakers PRELIMINARY It is desirable to have a SMART PINK NOISE GENER ATOR CARD and an E
16. Pt LEFT P1 NEUT P1 GND P1 RIGHT P2 LEFT P2 NEUT P2 GND P2 RIGHT 8 O 8 8 8 8 8 8 LO MODIIB STEREO PROCESSOR Convenient GROUND GND terminals are provided near the outputs A balanced subwoofer output is available on the MODIIB to provides an easy means to mono bridge the sub amplifier The subbass output may also be operated in an unbalanced configuration by connecting to the SUB terminal and GROUND MUTING FUNCTION A convenient MUTE terminal on the back of the MODIIB allows all output channels of the MODIIB to be silenced whenever this terminal is grounded REMOTE FADER OPERATION The volume control of the MODIIB can be operated remotely at another location independent of the FILM LEVEL fader This can be accomplished by adding a remote linear taper 10k ohm pot to act as a volume control between the REM SEND and GROUND ter minals on the back of the MODIIB Connect the wiper of the remote pot to the REM RETURN terminal The toggle switch on the right hand side of the Format Card labeled REMOTE LOCAL allows the operator to select either local or remote volume control of the MODIIB This switch is easily accessible by removing the four thumb screws that attach the front plate to the MODIIB Note Remote operation is for film formats only and will not affect the music level SECTION 5 CALIBRATION For more detailed information about setting up SMART processors see the Theatre Sound for S
17. XTENDER CARD for perform ing the calibration and testing of the MODIIB Note Make sure the SMART Pink Noise Generator Card has the following minor modification There must be a jumper wire between pins 4 amp 5 of the edge connector as viewed from the component side This allows the 12 Surround switch to simultaneously feed pink noise to both Left and Right Surround channels A future ver sion of the Pink Noise Generator card will have sepa rate Left and Right Surround switches The PINK NOISE card may be plugged directly in without the extender card if the metal cover is removed from the Pink Noise Card However it is easier if the extender card is used with the PINK NOISE card The PINK NOISE card plugs into the MATRIX CARD position for setting house EQ levels and sub bass levels The PINK NOISE CARD has seven switches Make sure the bottom switch is in the NORMAL position The top six switches are used to turn individual channels on and off These channel switches are three position with center position being off the top position giving an in phase signal and the bottom position giving an out of phase signal There is a built in high quality pink noise source which feeds these switches If a Pink Noise Card is not available for the MODIIB calibration then an external pink noise source may be used instead Feed the external pink noise source into the DIGITAL INPUTS on the rear DB25 input connec tor of the MODIIB for the fol
18. a TB3 SMART DEVICES SRS5B370 MULTI USE MOTHERBOARD plied power supply wiring harness along the left side of the equipment cabinet when viewed from the rear to the MODIIB processor Dress the wires for appearance and craftsmanship The wiring harness has a terminal MODIIB STEREO PROCESSOR strip that screws onto the back of the MODIIB Make sure to observe polarity As you are looking at the back of the MODIIB the top left terminal strip is where the power supply harness attaches The power supply wires will exit from the bottom of the terminal strip The red wire should go to the terminal marked MAIN PS the yellow wire to MAIN PS and the black wire to GND The emergency power supply is contained within the Main Power Supply There is a white wire with a red stripe that is part of the power supply harness and it should be connected to the MODIIB terminal marked BACKUP Remember to check all connections before applying power to the system A wire that is reversed could be very destructive to the system WIRING HOOKUP INSTRUCTIONS EASY HOOKUP All connections are made to rear of the MODIIB via terminal strips Inputs Outputs Power and Control connections are carefully laid out in groups Make sure each group has good separation between low level and high level signals SOLAR CELL HOOKUP Using two conductor shielded cable connect the wire from the left solar
19. accurate as possible OPTICAL PREAMP CALIBRATION Run a Dolby CAT 69 Test Film Dolby tone side Locate the Meter Card and set DIP switches 2 and 5 ON to the right All other DIP switches should be off This causes the top LED array to indicate the left chan nel preamp level and the bottom LED array the right channel preamp level Make sure you are changed over to the correct projec tor by observing the CHANGEOVER LED s on the Preamp Card The top LED is Projector 1 Turn Projector 1 left channel gain control counter clockwise until the bottom red LED on the top LED array of the Meter Card just blinks out All green and yellow LED s on the Meter Card should be lit on the channel you are adjusting Repeat the above procedure for the right channel gain control using the bottom LED array on the Meter Card as a reference You can verify that the LED meters are indicating cor rectly by connecting an AC voltmeter to the LEFT PRE 11 MODIIB STEREO PROCESSOR and RIGHT PRE terminals on the rear panel You should read between 700 to 714 mV AC at these test points If this is a two projector system change over from Projector 1 to Projector 2 by grounding the CHNG OVER terminal on the back panel Then repeat the above A chain calibration steps for the second projec tor SURROUND NULL Turn off switch 2 to the left on the Meter Card Now turn on switch 3 to the right which makes the bottom LED array the
20. der MUSIC INPUTS The MODIIB is designed to process both stereo and mono music sources from tape CD or cartridge play ers The music processing circuitry contains a simple matrix which derives four channels of sound from a stereo music source piciTat vusic INSTALLATION amp OPERATION SURROUND CHANNEL TIME DELAY The MODIIB has a digital time delay circuit for the surround channel while playing optical stereo prints Time delay of the surround channel in optical stereo mode is necessary for two reasons 1 to mask any front to sur round crosstalk and 2 to synchronize the stage and surround channels to eliminate echo caused by different sound path lengths from the stage and surround speakers MAIN OUTPUTS The MODIIB has six output channels LEFT CENTER RIGHT LEFT SURROUND RIGHT SURROUND AND SUB woofer The SUB outputs are balanced with SUB and SUB terminals available This allows a standard dual channel amplifier to be used in mono bridged mode to feed a subwoofer speaker MAIN POWER SUPPLY A heavy duty fully regulated power supply is furnished with the MODIIB processor This bipolar supply is heavily filtered and supplies ample current for both the positive and negative 20 VDC supplies This external power supply minimizes the chances of hum pickup when high gain electronic circuits are placed in the same chassis as a power supply Also the large power capacity of the supply provides a very stiff voltage to a
21. e or CD player MOTHERBOARD SRS5x370 SECTION 4 INSTALLATION INSTRUCTIONS PROCESSOR PLACEMENT IN THE RACK Before mounting the MODIIB processor in the equip ment rack or projector console be sure to select a well ventilated area that allows cool air to circulate around the individual components In SMART prewired rack oy SMART DEVICES R36A SRS5B330 l z Rape R75 O O x ze Y R37 R100 1 mE R38 4 R1 v4 w IN R76 x Re 4 z Re RTA E yyogoR10 BE R3 R39 vvv R7 a R4 a o R102 KG RA F S R46 R48 RG x ceg wit Sh oh Rel ox i pa Ree S RIB R mii RZ8A R5 R23 s Ip Pe ewe RS q x D R52 5 4 So Ct R Ree RII y eR 3 R104 a J ug 8 CARERS R53 y _ Pe A d O h Rigs E79MUSIC ROA te a Fi i R33 R35 C23 to FT S g H1 RP Rega R57A wee ee End u Ria ys R57B c26 Roe 2 rit 398 RS7C R57 R58 REZ GC z 18 Ce n ci 19 C2 cee c3 n m z E N KR g u C3 15 O wl 5 O R5
22. er equalize the sys tem All frequencies may be cut and boosted by as much as 7 dB in each of the 1 3 octave bands without creating the above problems The use of bass and tre ble controls on the equalizer has also been avoided to further minimize phase shift Each filter section uses a single turn trimpot for adjustment The equalizers are factory set for a flat response during final QC test Before attempting to equalize be sure the stage speak er connections are properly polarized the polarity of the components in each speaker system is correct and the speaker devices are mechanically aligned accord ing to the manufacturer s recommendations Remember that equalizers are used to tune the room NOT to correct poor speaker installation and align ment SUB BASS LEVELS With the Pink Noise Generator Card plugged into the Matrix Card slot turn on the LEFT and RIGHT pink noise switches Turn off the Left and Right channel amplifiers to prevent sound from the Left and Right stage speakers from affecting this adjustment Adjust the SUB LEVEL trimpot on the Output Card for 90 dBC spl from the subwoofer The installer may wish to adjust for another level depending on the amount of subwoofer desired Turn the Left and Right channel amplifiers back on An alternative procedure is to turn on the LEFT and RIGHT pink noise switches and adjust the SUB LEVEL on the Output Card to level out the lower end fre quencies as viewed on a
23. erent format changes available are MONO 3 D MONO STEREO A Dolby type A encoded prints FILM SR Dolby type SR encoded prints DIGITAL and MUSIC A format is active when the corresponding button is illuminated The 3 D Mono feature is active when the 3 D Mono button is lit Electrical power to the other cards in the system is distributed through this card The Format Card is where the FILM LEVEL fader MUSIC LEVEL control and REMOTE LOCAL volume control switches are located The NORMAL BACKUP switch is also located on this card Flipping this switch to BACKUP gives an emergency mono center channel The backup audio level is set by a multi turn pot on the Mono Backup Card There are two jumpers on the Format Card that select different defaults Jumper H3 is used to select default opti cal selection for digital movies see DEFAULT OPTICAL SELECTION in the WIRING HOOKUP INSTRUC MODIIB STEREO PROCES TIONS section Jumper H2 is used to select whether or not the 3 D feature is on or off for Mono mode when the processor is powered on see diagram Units are shipped to power up with the 3 D function active Either way the 3 D feature can be activated or disabled by simply pushing the g m 74 1 boo ONG 3 D button on the Format Card By toggling the 3 D feature on and off you can hear the difference the 3 D
24. es no warranties express or implied including warranties of merchantability or fitness for a particular purpose RETURN POLICY Factory authorization MUST be obtained before returning any product A 15 restocking charge will be issued on unused equipment in original box that is returned for credit Credit is issued to the dealers account The credit may be used against future purchases and no cash transactions are offered All returns must be shipped freight prepaid by the dealer Equipment returned without a factory RA Return Authorization will be refused Installation and Service Manual MODIIB Digital Optical Cinema Processor SECTION 1 INTRODUCTION The MODIIB Cinema Stereo Processor is a full four channel system featuring the latest technology in opti cal stereo soundtrack reproduction This advanced processor comes standard with many features yet is easy to operate The MODIIB has the ability to play spectral recording encoded soundtracks with the built in SR emulation noise reduction Digital soundtracks may be processed in four channel mode Intelligent design superb sound quality and the many features push the MODIIB processor into a class all its own To achieve optimum results from your new MODIIB cinema processor the theatre engineer installing the system should be totally familiar with all features and adjustments Careful attention to detail and familiarity with the installation instructions will allow you to
25. he necessary vE R28 ko Rat J A Ale B gi T Ray ha Be frequency response shaping and level shifting to pro y imi bag Ree gt R38 e vide a quality mono signal from mono prints In addi Q ey carl ms tion a special open ended noise reduction circuit O al O R52 BS Pg called Dynamic Noise Reduction is used to eliminate R58 ue s n O Rai O much of the hiss and film scratch noise often pre rer YRI 7915 VR SMART THEATRE SYSTEMS MOD4E308 P sent on film The MONO BACKUP card contains the necessary circuitry for the emergency backup system in the event of loss of sound within the MODIIB processor The multi turn pot on this card is for setting the emergency backup level 3 D MONO BACKUP CARD SRS5x305 This optional card can be ordered to replace the above Mono Backup card The 3 D feature a design patent ed by SRS Labs will generate a very realistic two channel Left Right stereo sound from any mono print The MODIIB can be figured to power up with the 3 D feature active for Mono prints see Format Card description or it can be activated by simply pushing the 3 D Mono button on the Format card The 3 D Mono feature is only used in Mono mode Both the Mono and 3 D Mono lights will be lit when this fea ture is active The 3 D Mono Backup card also contains the circuitry for the emergency backup system METER CARD MOD2x335 INSTALLATION amp OPERATION Hi gt Onon oo
26. l block the Noise Reduction Card from being removed NOISE REDUCTION CARDS The SMART noise reduction cards provide noise reduction for decoding Dolby type A stereo prints and Spectral Recording SR encoded prints The noise reduction circuitry is automatically switched to the proper mode when selected by the format switches on the front of the processor There are four trimpots and two test points on each NR card These are for factory use only Do not attempt to adjust these trimpots or use the test points MODIIB STEREO PROCESSOR m m Ul SR ui ly i GB T g 85 co i BH El F MATRIX CARD ut i TLOW THI O MOD4x317 ea cen ip ee a ZL L This is the heart of the stereo conversion process The S COP G kits to Wide Trac Deluxe Matrix card takes the signal from Re E PR the preamp and noise reduction circuits and converts one S TEBRA zO the two channel soundtrack into the
27. ll cards in the MODIIB to prevent power sag momentary drop of the supply output due to heavy loads This gives excellent transient response and superior stability EMERGENCY SOUND BACKUP POWER SUPPLY A backup power supply is included with the MODIIB to power the backup preamp built into the MODIIB This will ensure that you will never lose a show when using the MODIIB processor The backup supply is located within the main power supply package and delivers about 15 VDC at 100 mA The backup capability is a stan dard feature on the MODIIB and is not an extra cost option as it is on other systems MODULAR CIRCUITRY The MODIIB system is housed in a card cage rack mount assembly All circuitry in the MODIIB is on individual plug in cards that allows for easy servicing and future expansion of the system Each card has its own voltage regulators that stabilize the circuits locally as well as filter unwanted signals that may be present on the main power buses SECTION 3 CARD DESCRIPTION Test points are included on some cards for the sound engineer to access vital circuit points with his scope or meter These terminals will accept a meter probe or alligator clip Power must be turned off to the MODIB before any attempt is made to remove or install a card If not then damage to individual circuit cards may result FORMAT CARD SRS5x390 Audio format selection both manual and through automation is controlled by the Format Card The diff
28. lowing checks Set the pink noise source level for 55 volts RMS You must use an analog meter to measure this voltage level Special Note If you will be installing an external digi tal decoder do so AFTER setting house levels See the DIGITAL LEVEL SETTINGS at the end of the B CHAIN CALIBRATION section for more information For the following procedures select STEREO A by pushing the appropriate button on the Format Card Also set the FILM LEVEL fader to the one o clock PINK NOISE GENERATOR SWITCHING CARD Qoooa00000 FOR EACH CHANNEL SWITCH UP Positive Phase let 00 CHOO CHOOo NORMAL EXTERNAL MOD2 319 wg eur Guo P S7 The optional extender card can be used with the Pink Noise Card to calibrate the MODIIC This allows easier access to the Pink Noise Card position EQUALIZATION AND HOUSE LEVELS The equalizers are normally shipped with the 10 individual trimpots set for a flat frequency 5 response The optional 1 3 octave equalizers used for the stage channels are capable of cutting and dB 0 dB octave rolloff above 2K INSTALLATION amp OPERATION ISO Cinema playback standard states that 1 3 octave bands should be tuned for flat response to 2 kHz with a 3 Diagram 3 boosting each frequency band 10 dB The indi 5 vidual trimpots are single turn types with the mid position of each pot being flat unity gain 10 15 On the standard one octave equalizer cards all 31 5 63
29. n RTA set up in the auditori um Do not turn off the Left and Right channel ampli fiers for the alternative method Plug the MATRIX Card back into its slot OPTIONAL 3 D MONO FUNCTION No adjustments are necessary for units equipped with the optional 3 D Mono Backup Card MUSIC LEVELS Set the MUSIC LEVEL control located behind the front panel on the right side of the Format Card two 13 MODIIB STEREO PROCESSOR thirds up from its counterclockwise position Select Music mode and turn on the music source that is feed ing the MODIIB Turn the left and right music level trimpots on the Output Music Card to obtain a nor mal house level These trimpots are factory set and may not need adjustment DO NOT TURN THESE UP TOO HIGH as music to film crosstalk may occur Adjust the trimpots so that right and left music are set to the same level A way to accomplish this is to play a stereo music selection with a good vocal track and adjust either the left or right music trimpots for mini mum vocals in the surround channel The music circuit in the MODIIB has a simple matrix which generates four channels of music from any 2 channel stereo music source TIME DELAY Locate the 325 DIGITAL TIME DELAY Card The bot tom of this card has a rotary switch Each position clockwise on the rotary switch equals 10 mSec mil liseconds of delay Position 0 is the minimum delay setting which equals 10 mSec of delay Position 1 pro duces a to
30. nformation gives detailed instructions on the installation and opera tion of the SMART MODIIB processor We strongly encourage new owners of the MODIIB to thoroughly read this entire manual before placing their new SMART product into service This will ensure that the MODIIB will be operated properly to give the superior performance that it was designed to deliver For service or installation assistance please call our Technical Support Department between the hours of 8 a m 5 p m E S T Mon Fri 1 800 45 SMART LIMITED WARRANTY SMART products and accessories are warranted against malfunction or failure due to defects in workmanship or materials for a period of one year from the date of shipment If a problem occurs during the warranty period the unit will be repaired or replaced at our option without charge for materials or labor If air freight is requested by the dealer the difference between air and surface charges will be billed to the dealer This limited warranty does not cover products that have been abused altered modified or operated in other than specified conditions Prior factory approval is required on all returns Returned equipment or defective parts must be shipped freight prepaid to us by the dealer or customer Our limited warranty does not cover damages resulting from accident misuse or abuse lack of responsible care or failures not attributable to manufacturing defects except as provided herein SMART Devices Inc mak
31. ols fully clockwise Turn Slit Loss controls fully counterclockwise 6 Turn the FILM LEVEL fader all the way down to avoid excessive noises in the auditorium for the next steps SOUNDHEAD ALIGNMENT 1 Play a S M P T E Buzz Track loop Adjust the lateral film guide assembly or exciter lamp assembly Monitor the preamp signals with the oscilloscope Adjust for minimum signal on the left and right chan nels Refer to specific instructions in the projector soundhead manual Minor variations in alignment procedure depend on the individual mechanical design of the soundhead 2 Play CAT 97 Stereo Cell Alignment Film Move solar cell laterally and vertically until you have achieved minimum crosstalk between channels see diagram 1 3 Repeat steps 1 and 2 until no further improvement can be obtained 4 Play Pink Noise side of CAT 69 Test Film Switch oscilloscope to X Y Mode Adjust soundhead optical lens azimuth for narrowest diagonal trace see dia gram 2 Observe the real time analyzer and focus the lens for maximum high frequency output while main Diagram 1 He Bl Low crosstalk between channels taining the best azimuth This is not easy but it is one of the most critical adjustments affecting the overall system performance and is often not done as well as it should be 5 Adjust the vertical and lateral alignment of the EXCITER LAMP for maximum output on both chan nels This is especially critical with a na
32. onaural sound player such as a background music cartridge player that does not have stereo capabilities A jumper on the OUTPUT CARD in the MODIIB is moved to the MONDO position for this use The music source should then be connected to both LEFT and RIGHT MUSIC inputs Music will appear on all stage channel and sur round speakers when mono material is feeding the sound system FORMAT SELECT TERMINALS A momentary ground contact to one of the FORMAT SELECT inputs on the rear of the MODIIB will switch the processor to any desired format including music When the MODIIB is in music mode and any one of the film formats are pulsed the film sound will appear at the main outputs and the music will slowly fade out While the processor is in one of the film formats and the music terminal is pulsed the MODIIB will fade from the film mode to music Note The MODIIB powers up in Music mode DIGITAL INPUTS The MODIIB system has six inputs Left Center Right Left Surround Right Surround and Sub via a DB25 input connector marked DIGITAL INPUTS that can be used to process the outputs from an external digital decoder i e DTS Dolby Digital The DIGITAL INPUTS accept any high level multi channel source The audio signals are processed through the individ ual equalizers Output Card and Master VCA circuit before they appear at the Main Outputs These signals do not pass through the Matrix or Time Delay circuits See the REAR CHASSIS DB2
33. onds of delay for a maxi mum setting of 160 milliseconds position F UL i 1 A SG R8 A D ye c2 u3 R5 4 Op p G R6 C1 10 R12 E R13 C3 R1 S1 RII Ja 7 RUN TEST P cioe _XTAL 8 5 Z R24 218 c1a5 Y c1a4 U 0 arr i osd g 3 ua kig ez Oe Z aha Cia oo 2 7 3 VRB cil 18 R15 Rig 14 O06 i cist SZ Rea C16 z om Ri cray gt Es CYT C13 A smart MODSB325 Q DEVICES R23 DIGITAL DELA INSTALLATION amp OPERATION OUTPUT MUSIC CARD SRS5x330 Six channels of audio Left Center Right Left Surround Right Surround and Sub pass through the MASTER VCA Voltage Controlled Amplifiers locat ed on the Output Music Card The digital inputs also allow for separate Left Surround and Right Surround channels in addition to a separate subwoofer input The VCAs exhibit very close tracking between chan nels and are controlled by the FILM LEVEL fader con tained on the Format Card Music Fade in and Fade out controlled by the automation or front panel for mat switch is also on the output card along with a special music matrix to generate a four channel non sync sound from a standard two channel music tap
34. rrow slit opti cal lens because there is a much smaller window for the light to pass through 6 Check the high frequency output on both channels Diagram 2 INSTALLATION amp OPERATION Make sure the response is the same on both channels With a narrow slit optical lens the response should be flat within 3 dB to about 12 kHz with NO slit loss correction If not this MUST be corrected before proceeding with the next steps It is not permissible to use slit loss correction to correct poor high frequency response caused by misalignment of the opti cal soundhead An EXCITER LAMP out of alignment the barrel of the optical lens crooked or oil in the optical lens will all affect output and balance SLIT LOSS CORRECTION Run the Pink Noise side of the CAT 69 Test Film Observe the frequency response on your RTA which should be still connected to the preamp testpoints Adjust the left and right slit loss correction trimpots on the PREAMP CARD for optimum flat high frequency response Do not over adjust the slit loss cor rection in an effort to obtain extended response This will result in an undesirable frequency response peak Note While adjusting the slit loss correction aim for as flat a high frequency response as possible If one of the preamp channels is slightly worse than the other then adjust the better responding preamp to match the lesser This will ensure that the matrix steering in the MODIIB will be as
35. s used to set the system level for any film format but not for music level The system was calibrated with the FILM LEVEL fader at the one o clock posi tion which is where most prints will play at a normal level MUSIC LEVEL CONTROL The music level should have been preset by the installer of the sound system However if any change in music level is desired then the MUSIC LEVEL con trol can be turned to change the overall volume level This trimpot is located on the lower right side of the Format Card The four screws holding the front panel of the MODIIB must be removed to access the MUSIC LEVEL control EMERGENCY BYPASS SWITCH The MODIIB contains a backup system that will keep the show sound on the screen in the event of a failure of the processor This special circuitry is located on the Mono card in the main card cage unit and is activated by the NORMAL BACKUP switch located just above the Format pushbuttons SECTION 7 SCHEMATICS Format Card SRS5x390 page 16 Pushbutton Card MD2BX392 page 17 Dual Projector Preamp Card MOD4x300 page 18 Mono Backup Card MOD2x305 page 19 Meter Card MOD2x335 page 20 Noise Reduction Card MD2Bx374 page 21 Matrix Card MOD4x317 page 22 STEREO MASTER FADER b The Normal Backup switch and Stereo Master Fader Optional 1 3 Octave EQ Card MOD4x320 amp 321 INSTALLATION amp OPERATION page 23 24 One Octave EQ Card MOD4x324 page 25
36. sor to switch to an optical format in the event that the digital decoder fails or loses time code When this happens the digital decoder will pulse a special terminal to ground to alert the processor to switch to the optical format On the MODIIB Digital DB25 input connector this ter minal is the Stereo A Stereo SR pin see above The MODIIB will switch to either Stereo A or Stereo SR depending on the location of a jumper H3 located on the Format Card The MODIIB is shipped to default to Stereo A in the event of a digital decoder problem In this default mode jumper H3 on the Format Card jumpers the center pin to the A pin For a default setting of Stereo SR you must move the H3 jumper to jump the center pin to the SR pin The factory default setting of Stereo A should be adequate for most theatres However if Stereo SR default is desired then the Format Card must be removed to access the H3 jumper Make sure power is removed from the system before removing any card or plugging one in OUTPUTS The MAIN OUTPUTS are labeled LEFT CENTER RIGHT LEFT SURROUND RIGHT SURROUND SUB and SUB Shielded cable should be run between these terminals and the next piece of equip ment in the sound system equalizer amplifier etc I 220090900000000 6 000000000000 DIGITAL INPUTS cnD MUSIC LEFT cnD MUSIC RIGHT E MUTE CELL INPUTS gt J SUB LEFT PRE RIGHT PRE CHNG OVER
37. tal of 20 mSec of delay position 2 30 mSec etc The maximum amount of delay possible is 160 mSec Measure the distance in feet from the ideal seat which is usually 2 3 of the way back from the stage speakers centered side to side to the stage speakers Now measure the distance from the ideal seat to the nearest surround speaker Subtract the two measure ments Now add 20 to this number to get the delay in milliseconds required in the auditorium Set the rotary switch to the nearest setting in milliseconds DIGITAL LEVEL SETTINGS Incoming signals feeding the DIGITAL INPUT termi nals MUST be trimmed externally to match levels from the Stereo Optical signals These adjust ments can be made at the output of the external digital decoder or interlock audio tape machine see manufacturer s manual Make sure that all other B chain calibra tion adjustments have been made prior to adjusting the digital lev els see special note in the PRE LIMINARY section of the B CHAIN CALIBRATION POSITION DELAY mSec 0 10 nM OO ojl BD gt of cof Ss am co amp co ro al El zl S SIS of of 2 al gt S S 3 S 3 3 Sls 3 3 5 S S This completes the B chain cali bration SECTION 6 14 OPERATING INSTRUCTIONS The MODIIB system is one of the easiest systems to operate The Manager Operator of the sound booth should review the operation instructions to ass
38. ure that emergency functions are also understood should they ever be needed TURNING ON THE SYSTEM The sound engineer who installed the sound system has provided a way to apply power to the system through a master power switch or circuit breaker Also several of the individual components in the equipment rack have their own power switches Become familiar with all switches or breakers that con trol power to the sound equipment If the components are normally turned on individual ly it is important that the processing components are turned on first and the power amplifiers are turned on last This will allow time for the low level circuits to stabilize so that the power amplifiers will not pass a turn on thump to the auditorium speakers Repeat in reverse order when turning off the system MUSIC SELECTION It is likely that the sound system will be turned on before the arrival of the first audience of the day The MODIIB powers up in Music mode If the music play er CD player or tape machine is running music will be heard in the auditorium and on the booth monitor Music may also be selected by pressing the front panel MUSIC button PROGRAM SELECTION The automation should be set to select the proper for mats when needed However any format may be overridden by simply pushing one of the Format but tons located on the front of the MODIIB FILM LEVEL FADER This control is located on the MODIIB Format Card and i
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