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PROFESSIONAL STUDlO AMPLIFIERS Studio Referenc dio Referenee Some models may be exported under the name Asrr@rou@ O "99 8by Crown Ir~ternatit:,nal, fnc.,P.O. Box t COO, Elkhart. lndizn~i46575-?OQO U.S.A. Telephone: 219-2448000.Sfudio Refere?-9c:cawplifiers are produced by Crawn fnterrsaticsnal, Inc, xr'radernark Notice: Skrdio Reference'*and Gronnd~d&!.idge7"are tradcrnarks and Amcnm:'@&IrcswsT10C? ODEP IQ S,ysl'cm.e"and &"i.PF are registered trademarks trf Crcwn BntsrnationaY, Irx. Blher trademarks are the properv of their respecliveowrwrs. @Krawn" , , Stlidio Refgrence Service Manual .-. -""..."" , , , R-*. ~ 6K The information furnished in this manual does not Include all of the de"iaifs sfdesign, production, or variations of the equipment. Nor does it cover every possible 8itua"ii~nwhich may ariss during installation, operation sr maintenance. if you need special assistance beyond the scope of this manuas, please eontact the Crown Technical Suppart Group, Mai/: P.0. BQX4008 Elkhart lN 465?5-1000 Sbippin-ag: Pit. 2 S,W,, 1718 W, Mishawaka Rd., Elkhark EN 46517 Phone: $800)342-6939/(2 19)294-8206 FAX: $2"19) 294-8361 Web:~ w ~ c P Q w ~ ~ u ~ ~ ~ ~ c o ~ TO PREVEMT ELECTRlC SMOCK 80 NQT REMOVE TOP OR B Q n D M COMERS. NQ USER SERVICWBLE . PARTS INSIDE, REFER SERVOCtNC TO QUALIFIED SERVICE PERSOMNEL* DISCONNECT POWER CORD BEFORE REMOVING RmR ENPUT MODULE TO ACCESS GAIN SWITCH, A PR~VENIRLE CHOG ~LECTRIOUEN'ENLEVU PA8 LES CQUVERTURES, RlEM DES PARTlES UTlLES A L"INT~RIEUR, D~BRANCHERu BORNE AVANT DWUVRIR U MODULE EN ARRI~RE. f 0 REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT EXPOSE THlS EQUIPMENT TO RAIN OR MOISTURE! Rev. Q 12-98 Initial Printing This page intentionally left blank Rev.. 8 - Studio Reference Service Manu3l @crown 1 Bntroductisn ...................................................................................................3-1 1-1 1.1 The Stndis Referents ........................................................................ 1.2 Scope ................................................................................................ 1-1 1.3Warranty ............................. ~ . ~ ~ ~ ~ ~ . . . ~ . ~ . . A ~ ~ ~ ~ ~ . . . . , 1-1 . . . . 2 Specifications ................................................................................................ -2-1 2."Berformance ...................................................................................... 2. 1 2.2 Pswei .................................................................................................2-1 23 Cantrofs .............................................................................................2-2 2.4 f ndicators ..........................................................................................2.2 2.5l~putsautput......................................................................................2-3 2.6 Output Signal .....................................................................................2-3 2 2 Protcctisn .......................................................................................... 2.3 2.8 Construction ...................................................................................... 2.3 3 Va1tags Conversion ........................................................................................3-1 4 Circuit Theory ................................................................................................. 4-4 4.1 Overview ...........................................................................................4-1 4.2Features ............................................................................................. 4-2 4.3Frant End Operation ..........................................................................4-2 4.3.1Balanced Gnin Stage (BGS).....................................................4-2 4.3.2 Variable Gain Stage (VGS) ........................................................4-2 4.3.3 Error Amp ..................................................................................4.2 4.4 Voltage Amplification ......................................................................... 4-2 4.4.1 Voltage Transfators ....................................................................4.3 4.4.2 bast Voltage Amplifiers (LVAS)..................................................4-3 4.5 Grounded Bridge Topology ...............................................................4-4 4.5. Wigh Side (HS) ......................................................................... -4-4 4.5.2 Law Side (LS)............................................................................4.4 4.6 Output Device Emulation Prccalectian (OBEP) ....................................4-5 4.7 Ganliol Circuitry ................................................................................4-6 4.7.1DC$LFProtect ............................................................................4-6 4.7.2 fault Circuit ............................................................................... 4-6 4.7.3 Turn On Belay ...........................................................................4-6 4.7.4 Fan Corjtrol ................................................................................ 4-6 4.8 Power Supply ....................................................................................4-6 4.8. 1 AC kine Fiiter ............................................................................4-6 423.2 Soft Start ................................................................................... 4-6 4.8. 3 Over Voltage Protection ............................................................4-7 4.9Display Circuitry .............................................................................. "4-7 4.9.1 1QC ............................................................................................ 4-7 4"9+2ODEP ........................................................................................ 4.7 ........................................................................ 4.7 4 3 3 Signal Indicafis~s . . . . . ........................................................................................................... "....... 5 Electrical Checkout and Adjustment Procedures ,,,.......................................5-1 5 1 General Informatiow ........................................................................... 5-1 5 2 Standard Initiat Conditions ................................................................ 5-1 53 DC Offset .......................................................................................... 5-1 5.4 Output Bias Adjustmen$....................................................................5-1 5 5 OBEP Voltage Adjustment .................................................................5-1 5.6 AC Pawer Draw ................................................................................. 5-1 5.7 High tine Gutsue ................................................................................5-1 5-8 Common Mode Wejects'sn ..................................................................5-1 5.9 Voltage Gain ......................................................................................5-2 533 Level Controls ................................................................................. 5-2 5.1 1 Current bimi"r .. ............................................................................... 5-2 5 1 2 Slew Rate and *a OK Square Wave ....................................................5-2 5.f 3 Crosstalk ..........*<."........................................................................... 5-3 5.1-4 Output Power ................................................................................... 5-9 5.15 Reactive Loads ................................................................................5-3 5.16 ODEP Limiting .................................................................................5-4 5% 17 Mute and Turn-On Delay ..................................................................5-4 5.18 Law Frequency Protection ...............................................................5-4 5. 19 Signal to Noise Ratia .......................................................................545 5.20 Intermadulation Diskoflion ............................................................... 5-5 5.21 LED Functions ................................................................................. 5-5 5.22 Display Set-Up ................................................................................5-5 5.23 Turn-On Transients ...........................................................................5-5 5.24 Turn-OM Transiep-rts..........................................................................5-5 525 Past Testing .....................................................................................5-5 6 Schematics ....................................................................................................6-1 7 Parts Information ............................................................................................7-1 7. 1 General lnfarmation ........................................................................... 7-1 7.2 Standard and Special Parts ............................................................... 7-1 7.3 Ordering Parts ................................................................................... 7-1 ........................................................ 7.4 Shipment .................... .,..... 7-1 7.5 Terms ................................................................................................. 7-7 .., 7.6 Illustrated Parts List ........................ , . , , ................................7-1 .........................7-2 Figure 7.1 Front Panel Exploded View ................... , . . Figure 7.2 Top Main Assembly Exploded View ...................................... 7-4 Figure 7.3 Bottom Main Assembly Exploded View ................................ 7-6 Figure 7.4 Back Pans[ Assembly Exploded View ........,........................ 7-8 Fi%jure7.5Output Assembly Exploded View ....................................... 3-161 Figt,ire 7% Capacitor Assembly Exploded View ................................... 7-12? Figure 7.7 PIP Cage Assembly Exploded View ................................... 7-15 R@K 0,... . _____ylll~1~1111__ ,, Stvd8"~ Reference Service Manuai @CrQWne P, , , P ................................................. 8 Module information ........................................................................................ 8-4 8.1 General information ........................................................................... 8-4 8.2Studia Reference 1 Module lnfsrmatisn .............................................8-1 8.3 Studio Reference If Module Infsrmatisn ............................................8-1 8-4 Q.4397 1-6 Main Module ......................... . ..., ..................................$3-2 8 5 Q43369-0 Outp&r"lodeelie .................................................................. 8-8 8.6 Q43183A3 Control Module ..............................................................8-11 8.7 Q43.450-8 Control Module ...............................................................8-14 8.8843584-2Control Module ............................................................... 8-17 8.9a43018-3 Display Modu8e ...............................................................8-20 8.1Q 64331 1-2Main Module ................................................................. 8-23 ............. 8-28 8.11 Q43388-0 Main Module .................... . . .. .,,.. , . , 8.t 2 Q43389-8 Butput Module ..............................................................8-33 8.13 a43312-0 Display Module .............................................................8-36 @crowne .."..- P -....... Studio Reference Service Manusf p w , , , , R ~ 0K P P Figure 2.1 Studio Wefsrence Dimensions .........................................................2-3 Figuss 3.1 Specific Voltage Wiring ...................................................................3-1 Figure 3 2 Circuit Breaker Selection ...................,... ......................................3-11 Figure 4 .t Simplified Studio Refereilea Biock Diagram ...................................4-1 Figure 4.2 Simplified Ampiitier Front End and Voltage Ampiifiication Stages .. 4-3 Figure 4 3 SimpfifiedGrounded Bridge ................... ....., .............................. 4-5 Figure 5.1 Differentiatar Circuit ........................................................................ 5-2 figure 5-2Differentiated Square Wave ................................,,,,..*+.+'......... 5-2 Figure 5 3 10 kHz Square Wave ................... ................................................... 5-2 Figure 5.4 inductive Load CoId ........................................................................5-3 Figure 5.5 5~nd~etive Load Warm ......................................................................5-3 Figure 56 Tartup@Yest Waveform .....................................................................5-4 Figure 5-4OBEP Limiting Waveform ..................................................................... 5-4 Figure 7. 1 Front Panel Parts ............................................................................. 7-2 Figure 4.2 Top Main Assembly Parts ................................................................7-4 Figure 7.3 Bottom Main Assembly Parts ....................... .................................. 7-6 ........................7-8 Figure 7.4 Back Panel Assembly Parts .................... ......... Figure 7 5 Output Assembly Par& ..................., . ........................................7-16 Figure 7 3 Capacitor Asssmbly Parts ............................................................F.12 Figure 7 2 PIP Cage Assembly Parts .............................................................7-14 Figure 8. 1 a43371-6Main Msdule Map ..........................................................8-7 Figure 8.2Q43363-8 Output Module Map ..................................................... 8-18 Figure 823 Q43383A3 Control Maduis Map .................................................... 8-13 Figure 8.4 Q843458-8Control Madula Map .....................................................8-16 Figuse 825 Q4J5Q4-2Control Module Map .....................................................8-19 Figuw 8. 6 643818-3 Bispray Module Map ..................................................... 8-22 Figure 8.7 a4336 1-2 Main Module Mag ...................... .............................. 8-27 figure 8.8 843388-0 Main Module Map ........................................................8-32 Figure 8 3 043389-8Output Modube Map .....................................................8-35 Figurs 8'16Q43312-0 Display Msduls Map ..................................................8-38 t .I Ths Studia Referenee The Studio Reference amplifiers are the flagship sf Crown Internatfsna\.They oRsr the best in sound reproduction with a dynamic range capable of accurately reproducing 20-bit digital recardings. Super low harmonic and intermodulationdis$or$ionprovides the best transfer function in the business. And the ultra-high damping factor af 20,000detivsrs superior foudspeaker motion control for a tight and clean low-end. Schematics are included. Note that a Mexdu%e is comprised a$the circuit board with the component parts [email protected] does not sell blank (unpopulated)cis=. cuiQ boards. CAUTIOH: TRs infermatien in this manual Is Intsndsd to b~ ossd by an exparlenc%dt@~hnlclaa only h 1.3 Warranty Each Reference Manual contains basic pslieies as refated to %he customer. In addition, it should be staked that this ssrviee dacumentalisn is meant ts be used This massr_eaIcontains sewice information for the Grown Studio Reference power amplifiers..It ia designed I ~ P snly by properly trained service personnel. Because most Crawn products carry a 3 Year Full Warranty (inbe used with the appilcable ReferenceManual' Howciud~ng round trip shipping within the United States), ever, some important information is duplicated in this aft warranty service should be referred to the Crown Servica Manual in case t h e Reference Manual is not Factory or Authorized Warran& Sewice Center. See the readily availabls. applicabls Owner's Manual for warranty details,To find the iocation Q theInEarsst Authorired Sarvice Center, This Service Manual includes severaB sections,These or to obtain instructions fcar receiving Crown Factory sectiians include Sp~cifications, Vottag~Conversion, Circuit Thssry? EEfectrieal C h e ~ k o u tParts , Information, Service, piease contact tho Crown Technical Support Module Information, aod Exploded View Drawings, Group (within North Amerrca) or your Crown/Amcrg;bn Importgr (outside North America), 1.2 Scape Plant 2 S.W, 1718 W. Mishawaka Bd, Elkhaa, IN USA 4651'7 Phone: (219) 294-8200 Tall Free: (8QO)M2-6939 F M : (219) 294-8301 Web: .er~wnaudis~com Introduction t -7 Sf ~ d i Reference o Service Manual This pa@@ intentionally left blank introduction 4 -2 Studio Referenee Service ,Msnual The following specifications Mode, with an 8Ohm load, a 26dB, banless stherwise specified. on Bode Wajsctlon [CMR):Better than 100 dB beted full bandwidth power from 20 Hz to 480 Hz, rising tinearly I sbetter than 79 dB at 20 kb4z, Low-.DJ&o~P@@ t kHz Psaar: Refers to maximum average power in watts at 1 kHzwith 0.02% THO and noise.. Full B ~ n d ~ i dPawer; th Refers to maximum average pawer in watts from 20 Hm to 26 kHz with 0.1% THB and noise. Voltage G ~ i n :(With : Isvel controls set far maximum ocntput,) At the 26 d B garn setting, 2 Q : h 3 %or 26 dB ~ 0 ~dB, 25 Studio m , n , & z ; eAtL0.775volt sensitivity? 'I63:1 k 12% or 40 dB 1 dB; at 1.4 volt sensitfvity,57:1 k 12% or 35 dB k 1 dB. Studo i - ..-. At 0.775 volt sen%itiviby, 6 9 : k j2% aor 37 dB 41 dB; at "84 volt sensitivity, 38.1 ~ 1 2 % o r 3 2 d BdB. ~1 2,l PeHormsnee 2,2 pa we^ Ftgquency Response:: ~8,MdB from 20 Hs to 20 kHz at P s ~ eBandwidth: r (At standard 1 kHz power.) &,df-rence6: -^B dB from 5 Mz to 27.5kHz and -3 dB from 3 Hz ta 32.8 kHz. -1 dB from 5 Hz fa 28.6 kHz and --3d B from 2.3 Hz to 34.4 kHz, S t a ~ d ~ r1BkHz Power: Refers ts maximum avsrage pswer in watts at I kHz with 8.1% TkJD and noise, 1 watt. Phase R~$pon%@: +5 to -75 degrees from 20 Hz ta 26 kHz at 3 w ~ t t ~ .- 8ignai-to-noise: (A-weighted) reater than 120 d B belaw rcater than 13 7 dB below full bandwidth powerh Tat@! Harmonic Dldsalon (TWO): Less than 0,02% a4 rated low-distortion I kHz pswer. Less than 0.1% af rated full bandwidth power, tsw-Di%tofllsn f kHz Butput Power: Sfudio .... Rcf@rea& $t~?rea Made with both cchannsbs driven. 1,160 watts per channel into 4 ohms, 768watts per channel into 8 ohms. lntsrmoduEIaZlon Qiatagian {IMDf: (60Ha & 7 kklz 4: 2) Studio R ~ f ~ Less r than w 0,005%from full bandwidth power to 78 watts rising linearly to 8.025% at 78milfl~atks~ Studio Re-f Less than 0.005% from ;Bull bandwidth power ta 36 watts rising lineariy $a 0.025% at 36 mtliiwatts, *- - Damping Factar: Greater than 20,000from "B BHZ to 280 Hz, and greater than 2,568at 1 kHz. Crosstalk: (At rated full bandwidth power,) S b ~ dReferi~ Batter than 106 dB from 245 Hz ta 100 Hz, falling linearly to better than 70 dB at 20 kHz, Betdef khan 180 dB from 20 M E to f 66 Hz,falling tinearly to better than 65 dB at 20 kHz, B~idge-Monomode: 2,228watts Into 8 ohms, 1,580watts into 16 ohms P8~3I/e/-Msn0mode: 2,37 5 watts into 2 ohms, 1,565watts into 4 ohms. m,,B@Stereo Mode with both chag.gne!sdriven: 555 watts per channel into 4 ohms, 355watts per chanilel into 8 ohms. Bridge-Mono mods: "i110 watts into 8 ohms. 715 watts into 16 ohms. Parab/e/*!donsn~ade: 1,115watts into 2 alms. 730watts inta 4 ohms, Stereo mode wid)~both ~haanneIsdriven: 1,190watts per channel into 4 ohms. 800 watts per chaunef iota 8 ohms, Bridge-Mono mode: 2,375 watts inis 8 ohms. 1,595watts into 16 ohms. Enable: A front panel push button used to turn the amplifier on and off, Level: A front panel rotary potentiometer far each ehannel with 3 1 dstents, used $0C B ~ ~ F O I the output level. Stsreomono: A three-pasitiaw back panel switch used to select either Stereo, Bridge-Mano or Parallel-Msns Par~jIef-Mono mode: 2,350 watts into 2 ohms, 1,588watts into 4 ohms. St~d8"o RefefcnceH: S!W@Q mode wifh both cchanne/s drjven: 565 waus pea channel into 4 ohms. 360 watts per channel into 8 ohms. Bridge-Mono m ~ d ~ r 3 ,f 45 waEs into 8 ohms, 720wakk into 16 ohms Par8$/@/-Mono mode: SsnsitivlQ: A three-position switch inside the P,l,I,pcornpartment used ta select the input sensitivity for both ek?annefs:6,795a i 1.4 volts for standard 'IkHz pg;aw~r, or 26 dB voltage gain, Mater OnfBff: A tws-position switch behind the front pane! used to turn the front panel meters on or off, Meter Display Mode: A twa-position switch behind the frsnt panel used to set the display mudc tor t h s front panel meters. Display modes include dynamic range af the output signal in dB or output levels in dB. 7,135watts into 2 ohms. "715waE%into 4 ohms, Ground Lift: A two-position back panel switch used to isslate the irrput phone jack and AC {chassis) grounds. Full Bawdwidth Butput Pewer: (20 Hr lo 28 kHz) Reset: A t w o - p ~ ~ l t i oback n panel switch used fa roset t h e AC mains circuit b~eaker* E@r@o made wjtfi both -lh~aanne/s drivepa: 1,075watts per chanaal into 4 ohms. 768watts per chaalnel ir3Po 8 ohms. BrBdge-M~f?~ 2,150 watts into 8 ohms+ "3,535watts into f 6ohms. $&2dio Ref-K St~f-sa mode wifk bath chhanng!~db^ven: 495 watts per channel into 4 ohms. 340 watts per chaanel into 8 ohms. Brid~e-Mgbf?~ mode: 1,020watts into 8 ohms. 698watts into 16 o h m s . Load Impedsn~e:Safe with all types of loads, Raked far 4 ts 8 ohms in stereo mode, 8 ts 16 ohms in BridgeMona made, and 2 to 4. ohms in ParalteI-Mon~M O ~ G , Required AC Mains: 56 or 60 Hz; 106,120, 200, 220or 240 VA6 (k 10%)<Both units draw 90watts or less at idle. 2,4lndicatars Enable: This indicator shows the o n / M status of the unit's How-voltage power supply Signal::Each channel has a signal inclicatar that flashes to show audio output. i@C: Each channel has an 18C indicator %hat flashes if the output waveform differs from the input wavsform by 0.85% or more. The LED$ act as sensitive distsrtion indicators to provide proof of di~f~rtian-free performance, In Paralfel-Mono mode the channel 2 /0@ Ilght stays an. 0DEP:Each channel has an ODEPindieator that shows the channel's resewe energy status, Normally, the LEDs are brigfatly tit to show that reserva energy is available. In the rare event that a channel has no reserve, its indicator wisi dim in proportion to BDEPlim- Dynamic Ranga/Lsuel Meter: Each Channel has a fiveInput: Input overload prstectisn is furnished at the segment meter that displays either the dynamic range amplifier input to limit current. of the output sigrrai in dB sr the output love! in dB, (From the factory, the amplifier is set to display dyTurn On: The four second ~ C ~ T M - deilay Q~ prevents dam namic range.) A s dynamic range meters, they show gerous turn-on transier~ts, %heratio sf peak to average power of tach channel, As output level meters they show how high the ~ ~ ~ l p u2,8 t Constrvctlon levels a r e relative to standard 1 kHz powerq Steel chassis with durable b8ack finish, aluminum front panel with super-glass Imronfinish, l e x a ~averiay? , and 2.5 llnputlOutput a specially designed flaw-through ventilation system input Csnneetor: Two balanced '!,is-inch jacks an the from front to side panels. back panel and two balanced three-pin XLR connectors on the factory-installed P..B,?-FX, CoeiJng: Convection cooling with assistance from the computerized, on-demand proportional cooling fan. lnput impsdanee: Nominally 10 K ohms, balanced Pdornina!ly 5 K ohms, unbaianced. Dimen$ions: Standard 19 inch (48.3 em) rack mount width fElA RS-316-B),9 inch (17.8 cm)height, 16 inch I ~ p uSan%itiuiQ: t Settings include 0,775volts sr 1A volts (40'6 CM) depth behind mountingsurface and 2.75inch for standard 1 kHz pswea: or 26 dB voleage gain. (7 em) prstrusion in front sf mounting surface (sea Fig. 2.1 belaw), Output Canaeetam: Two sets of color-coded 5-way binding posts far each cha~3rrel(for connecting barlana plugs, spads lugs si bare wire), Qutput Impsdaase::Less than 10 miBliahms in sarisa with 2,smicr~henries, DC Output 8@ssZ;(Shorted input) 3 2 millivslts. 2.6Output Signal Starsa: Unbalanced, twa-channel. Brldgs-Mona: Balanced, singla-channel. Channel f controis are active; channel 2 should be turned down. Parallai-Mono: Unbalanced, single-channel.Channel "icontmls are active; channel 2 is bypassed. 2,7 Protection WaiigM: Center of gravity is about 6 inches ODEP: ff unreasonable operating conditions $~~g;;urApprsxlmata (15.2cm)behind the front mounting surface. which could stress the output circuitry?the QDEPcircuit limits the output current level until safe operating conditions exist. Trensformer: Transformer overheating will result in a temporary shut-down due ta a ttmerrnal ~wifchin the transformer primaryRF Burnout: Controlled slew-ratevoltage amplifiers pro- 1 60 pounds, 11 ounces unds, 3 ounces (332k g ) shipping weight. 56 pounds, 2 ounces (25.5kg) net; 69 pounds, "10ouncss (31"6kg) shipping weight. tect the unit agairlst RF burnouts, Specifications 2-3 Studio Reference Service ManuaI This page inten&ianally/aft blank Studio Reference Service Manual age Convers -."- corner of module). 3, Cut and remsve the wire ties to access the jumpers and wires, 4. Refer to Figure 3,1 and make the appropriate charrges for the desired operating voltage. 5. lnstaBI wire ties to dress the wires above the con- The Studis Reference Ampfifiers can be wired for 100 VAC? I20 VAG, 200 VAC, 220 VAC or 240 VAC operation, This is made passible by the use of a multitap transformer for the high energy power supplies. Perform the fallowing pracedure and refer %sFigures 3.3 and 3.2 ta convert the operating voltage. YOUmay have to order t h e approprate circuit breaker using the part number listed in Figure 3.2. right hand nections. 6,Note the switch on the ief2 hand side of the module and change, if necessary, for the operating line frequency. 7 , Refer "IFigure 3 2 and change the Circuit Breaker if necessary+ 8. On the rear 05 $he unit, change ?$"re line cord tag to read the correct valtage. This is on the lower right hand side of the rear panel, just above t h e serial tag. 9,ReassembHe the unit. CAUPfO#: B~eausathare 1% a risk of slsctr!~sheek, sniy on gxperisne~dt~ehnicianahould aggmpfk ts altgr the line valtage contlguratiian, 1. Remove tha tap cover of the Studio Referenee amplifier (held on by 8 screws). 2, With the front panel toward you, locate tka controt module {frontcenter) and the tab connectors (upper VOCrAGE JUMPER 1 WPt 6 Figure 3.1 Specific Vo1tage Wifing Ct RCUfT BREAKER SELECTiON 30 AMP, C 7756-7 1 AMP. Cl 0193-8 20 @-.,"-crawma - Studio Reference Service Manuaf . , . , " ' , -- . . . " . - This page intentionally left blank Voltage Conversion 3-2 R@K0 . Studio Reference Service Manual INVERTING LOW SIDE BRIDGE OUTPUT BWUNCE PNP STAGE Circuit Theory 4-1 Bcrcrurn. , , , Sfudjo-,-.-.- Weference Service Manual -.".- .,.".,- R ~0 K k to interrupt around lw~=os via the Ground Lift Switch. The non-inverting (hot) si& of the balanced Studio Referenee amplifiers utilize numerous Crown input is fed to the non-hverting input of the; firs@ opinnovations, including gf@tuflded bridge and ODEP amp stage. The inver"ring (negative) side o f the balteehnofogies. Cooling t~chniquesmake use of what is essentially air conditianer technology.Air flows bottom ancsd input is fed to the inverting input of the firswspamp stags. A potentiometer is provided far esmmon lo top, and front to side. Air ftsws a shafi distance across a wid@heatsink. This type of air flow pro.\rides mod@rejection adjnmstment ( R 5 f2).Electricaiiysthe BGS significantlybetter emling than the "wind $unnel'"tech- is at unity gain, (From an audio perspe~tive,however, this stage actually provides +6dB gain if a fully bainology used by many other manufacturers, Output transistors are of the metal can type, rather than f h ~ anced signal is placsd on its iraput.) Tho BGS is a nsn" plastic case style.This alIo\~s for a significantlyhigher thermal margin for the given voltage and current ratings. Ail devices used are tested and grad~dto ensure maximum reliability,Another electronic technique $putsf the BGS, the signal goes to the used is negative feedback. Almost atl power amplifigain is determined by the position of the ers utilize n~gativa;. feedback80 control gain and proitch, and lev@/ is detc~minedby the level vide stabifity$but Crown uses multiple nested feeds an inverting stage with the input being back imps far maximum stability and greatly impag>k/ed mp stage. Because gain after this stage damping. Studio Reference ampiifiers have damping B (factor s f 2Q), greater amplifier sensiin @XC$S$ af 20,000 in the bass frequencyrange. This s d $y csntrosling the ratio of f~edback feedback,along with our compensation and u t " l 3 - l ~ ~ nee, The Sensitivity Switch sets the indistortion output tapol~gy~ make Grown Studio Refput impedance to this stage and varies the gain such erence amplifier superior* that the overall amplifier gain is 26 dB, or is adjusted or 0.775V ar d.4V input to attain rated Fsatt~resspecific to the Studio Reference include: A high power toroidal Esansfsrmsr;Computer controlad, varjable speed, whisper quiet fan; Built in AC power fiffes; Softstart circuit Za control inrush curroot; Fuji ovtpuX from the VGS is fed to the nonervodtage and internal fault protection, This amplithe Errof Amp op-amp stage through fier can operate in either Bridgge;!or Parallel Mans mode, capacitor $Ct 00)and input resistor as well as in Dual (stereo) made, A sensitivity switch output is led back via the negative a)lowsseiectian sf input voltage requiredfor rated &rutop re~istor(W 1Q3),The ratlo of feedput. Level cnr-llr~ls are mounted on the front panel and are of the rotary type, Front panel indicators let the tpuWof the amplifier at 26 dB, Biuser know the status of amplifier enable, QDEP9signal revent averdriving the Error Amp. presence (SP!), and distortion (90C), Alsa included on mp amplifies the difference bethe front panel is a five-segmet display Tor each chanut signals, any differencein the riel which displays either dynamic range tn d B ar auttwo waveforms will produce a near open loop gain put level in dB, condition which, in turn, results in high peak auWpu&. ths Error Amp, called the Error For addiriauai details s~ferto the specification section, Signal (ES)drives the Voltage Translators, or ta the appficable WaFerence Manual, 4.3 Front End Operation The front end is comprised of three stages: Balanced Gain Stage (BGS), Variable Gain Stage {VGS), and the Error Amp. Figure 4 2 shows a simplifieddiagram of the front end and voltage ampixfieation stages, 4-3,f Balanced Gain Stage (80%) lnpk~tts the amplifier is balanced, The shield from the 1/4" inputs may be isolated from chassis ground by Cir~uitTheory 4-2 4.4Voltage Alnplifi~ation The Voltage Translator stage separates the output of the Error Amp into balanced positive and negative drive vol"s~ge?sfor the Last bltage Amplifiers (LVAS)~ translating the signal from ground referenced n15V to kV@creferenee, LVAS provide the rnak voltage amplification and drive the High Side output stages. Bemuse there is a slight lass of gain in the translator stage, the gain after the translatar is a factor of 25.2, ence. Their outputs drive their respechive tVA, muting transistors, The QQEP transistors steal drive as dictated by th@ BDEP circuitry or shunt the audio as dietated by thg fault circuit, Circuit Theory 4-3 Figure 4.3 is a simplified exampfe of the grounded bridgs output topology. It consists of four quadrants of three deep DarDington (composite) emitter-follsw~r stages per channel: one NPN and one PNP an the High Side of the bridge (driving the Isad), and apse NPN and one PMP an the Low Side of the bridge (controlling the ground reference for %Rerails). The output stages are biased ta operate class AB+B far ultra low distortion in the signal zero-crossing region and high efficiency. 4,5.%High Side [NS) Thhe High Side (HS) af the bridge operates much like a conventional bipolar push-pull output configuration,As the input drive vsitage becomes more po%itive,the HS NPN conducts and delivers positive voltage to the 10ad, Eventually the NPN devices reach full conduction and +Vcc is acrsss the load, At this time the HS PNP is biased off. When the drive signal is negative going, "Be HS PNP canducts to deliver -Vcc to the load and the HS NPN stage is off. ~ The output of the +LVA drjvm the base of $ 8 . pradriver device. Sgsgethar, the predriver and driver farm the first two parts sf the three-deep Darlingtonand are biased class AB, They provide output drive through the bias resistorxbypassing the output devicas, at Bevels beIsw about 180mW, An RLC network between the predriver and driver provide phase shift csmpensation and limit driver base current $asafs Bevels. Output devices are biased class B,Justbelow s%sculotf. At about 1QOmW blr~tpatthey switch on to eonduct high current to the load. Together with predriver and driver?the output device provides an averall cFass AB+B output, The negative half sf the HS is almsst identical to the positive half, except that the devices are PNP One difference is that the PNP bias resistor is slightly greater in value sa that PNP output devices run closer to the cutoM level under static (no signal) conditions, This is because PNP devices require greater drive current. WS bias is rsgulated by Q18, the Bias Seavs, Q l S is a Vbe multipiier which maintair-rsapproximately 3,2V Vee under static conditions, The positive and negative halves of the WS output are in parallel with this 3.2V With a full base-emitter on voltage drop across predrivers and drivers, tha balance of voltage rasuits in approximately .3V drop across the bias resistors in the positive half, and about .5V acrsss The bias resisi o rthus ~ bias) tor in the negative half, Q J bn$ ~ ~ n d ~ c l{and Circuit Theory 4-4 A diode suing pr~ventsexcessive charge build up within the high conduction output devices whew off, Flyback diodes shunt bask-EMF pulses from reactive loads to the power supply to protect output devices from dangerous reverse voltage levels. An output terminating circuit blocks WF on output lines from entering the amplifier through its output connectors, 4,5,2 L@wSide (L8) The tow Side (LS)operates quite differently. The power supply bridge rectifier is not ground referenced, nor is the secondary of the main transformer, in othsr wards, tha high vsltage power supply floats with respect ta ground, but ~ V c remain c canstant with respect to each other, This allows the pswer supply to deliver +Vcc and -Vcc from the same bridge rectifier and fiitsr as a total difference io potential, regardless of their voltages with respect ts ground. The LS uses inverted feedback from the HS output $0control the ground refer* ence for the rails (AVCC), Both LS quadrants are arranged in a three-deep Darlington and are biased AB+B in the same manner as thc WS, When the amplifisr output swings positive, the audio is fed to an sp-amp stage where it is inverted, This inverted signal is delivered direeIIy to the bases of the positive (NPN) and negative (PNP)LS predrrivers. The negative drive forces the LS PMP devices on (NPN off), As the PNP devices coaduct, VCB af the PNP Darlington drops. With LS dsviics emitters tied to ground, -Vcc is pulled toward ground reference. Since the pswer supply is not ground referenced (and the tatai vsltage from aVcc to -Vcc is constant) +VGC is forced higher above ground potential. This continues until, at the positive amplifier output peak, -Vcc -. OV and +VGC e q ~ a I the s total power supply potential with a positive pslarily' In the Reference 1, for example, %hepower supply produces a totat af14488 from rail ts rail (k72VDC me?asur@dfrom ground with ns signal), therefore, the amplifier output can reach a positiva peak sf +"I 44v* Cosrversely, during a negative swing af the HS output where HS PNP devices conduct, the op-amp would output a positive voltage forcing hS NPN devices to canduct. This would result in +Vcc swinging tsward ground potential and -Vcc swinging further from groidnd patentraf. At tl-$6negative amplifier sutpvt peak, SVCC =z OV and -Vcc equals the tstal power supply potential with a negative pofariWy.Using the same ex- E Sfudio Reference Service Manual Rev 0 -,..- ,,. , @CraUme ! t k rn I k72VDC statically) is capable of produsing 288V rent (negative amplifi~routput) and +Vcc are sensed, An iocrease in positive output signal into a load will measurable by normal means) and the time delay from @crown*-- -.-.-. Studio Refer~nceService ManuaE p.-p " - 4.7 C@~tr@l eireuitry The Reference amplifiers have fault protect circuitry to guard against dangerous DC voltages and turn on/ off transients, At the heart sfthis ~ir~~ifry the windew comparator ~ 1 0 2?kg , fan control girc~ij: monitors the thermal conditions, via the OBEP eireuit, and regulates the fan speed accordingly, 4.7,1 DCBF Pr@t@@ The amplifier output sigf-ralis passed through a low pass filter (R184, C1 19, R186 *and C107)ts the windew comparator (UJQ21, if DC campsnent exceeds a predetermined level, the output of the camparator (pins 1 and 2) goes law. The result is U302 pin 23 going to a high state which turns on the muting transistors and disables the high energy supply by opening the relay K2. 4,7,2 Fsuft Circuit The fau&circuitry is designed to mute audio and disa$le the high energy supply in the event of an output fault. A fau/$is defined as any time in which t h e output semicsnductars, in both the negative and positive sections, draw excessive currents, The [ow side of &ridgefaultdetection consists sf Q128, Q329 and Q130, ff both NPN and PNP output devices are conducting excessive cajirrents,tha output af U'T82 (pin 13) is forcegs$high, This disables the high energy supply and mutes the audio path, The high side sf bridge fault detection consists of a126,Qf 27 and U101. This circuit compares the NPN and BNP drive to the feedback signal, giving a representation of output devics current. If excessive curwnt occurs, the window cegmparatsr U1Q2is triggered through the opto isslatsr U101. 4.1.3 TBFR8 n Bs%ay During power up, the capacitor C'I 18 is charging, which causes %henan-inverting input {pin -4 09of U 182 to be !OW and the output (pin 13)$0be high, With pin 13 high, the high energy taik are disabled by the relay K2,and the audio is mutsd by the muting transistors. A f t ~ rapproximately 4 seconds, C1 "I Qis fully charged and pin 10 is pulled high, thus causing pin 13to go low and the amplifier to :,cams out of standby4,7,4 Fsn Centre! The F8n ContrdSi~na$is t.akenfromthe positive ODE$ bias valfages. Both channel 1 and channel 2 ODEP voltages are eambined to create the fan c~rrtrslsig- Circuit Theov 4-6 --- R@K Q , , ,- nal. As the outpeat transistorlheatsink increases in temPeratu~e,the ODEP voltage kvei will drop fmm +joVBC f3ear ~ ~If ~ 1s aCdropvin one of both QDEP vsltages it will Cause the fan csntroi signal to change,The fan contra& signal starts out around -12.5VDC, 3rd after complete ODEP limiting, ends up at + 12,5VDC0Phis voltage is fed into the inverting input of the op-amp U1B, The initial output sf U1B is high $+24V), and as the fan control signal becomes more positive, this output will became low, thus turnThe output of U1I3 drives ing the fan accordin~j~~ U4,an opts-triac, which in turn drives Q4, a triac in AG supply forf h e fan, Ph@Gating Signadis fed into the nsn-inverting input of $heQP-amP Uj@+This gating signal is a p ~ ~ d uofc t U7 A, Q 3 , and the Fan Enable signal from the display madule., C12 and RE3 farm an RC timing circuit that, from the +15V supply, begins Is charge, U1A rnonitars the tine voltage wave farm and is a O i l crossing detector. Every lime the line waveform crosses OV, Q4 is turned sa?and discharges C12, This causesa ramping type waveform.The higher p~$i$ive portion of .&he waveform is used to turn off %he~pto-triac,aven when the fan contrkal signat itself is aF a value ks turn sn the fan.Therefare,the fancantrod curr~nthas a duty cycle, 'The f%f? Enabje %nai cQm@s from the display !"nodu!@and holds the Gating Si~flafhigh when the amp& fief is in standby<"I^'herefsfe the fan will not turn when the amplifier is in standby* At the heart of the power supply is a muiti-tap torraidaH power transformer, There are two ungrounded, high energy, secondary windings, one for each channel, and there is one low voltaga winding for t h e 24V supplies, "f?er@ is also a thermal eu%off switch built into the transfarmer wtlich will disable the secondary windings in the event of the transformer overheating. 4,8,1 AC tin@Filter 824 and 025 are ir-t the AC primary, They are wired such that they null out any DC compo9-ren"inthe AC pawereThis done because the tarriodiat transformer may develop a mechanical buzz if them is any DC shift in the AC waveform applied to the transfarmer inrush current that is possible with the rmer, a SO%$ Start Circuit has been in- and power is applied diractty to the transformer. 4,9.3 Signal Indlcatlan incorporated on the display module are three modes 4,8.3 Over Voltage Proteetion U l El serves as a window comparator for the purpose of over line voltage cantro!, In the event that the line vslfags sxceeds 10%over the rated line voltage, the high energy power supplies are disabled, W7 %upplies the regulated + I SV to pin "Iof U1B and serves as the window reference level. With pin 10 in csntrof of U1D,&heoutput: (pin 13)has a logic law which is applied across 033 and 014, This prevents csndue- ef signal indication. tisn and allows Q1 to remain on, which thus allows K2 to remain ensrgired Resistors W3, W4, R5 and R6 serve a$ a resistor dropping neWsrk from the unregulated +24V supply to ground, A s the line voltage incraas~s,t h e unregulated supply will increase, The voltage ievsD sn the wiper of R4 is applied to Pin 11 (non-inverting input). When the Hevel exceeds %hewindow level of pin -10, the circuit switches states, This allows Dl3 and 014 to canduet, placing a logic high on t h e base 0%0 1 %This,iu turn, biases off Q 1 and de-energizes K2. 4.9 Display Circuitry 4.9.1 ilOC U3A and U3B serve as a voltage comparator with R13, R15 and R'W 7s the r@sistordropping newark. Pin '7' has a window level of +7V and pin 4 has a window of -7V U3A and U38 have a logic high which turns off and the 1 0LEO ~ El, when ths Signal fro.cam the error amp appears, the 7V window is overcame and switches t h e state of U3A and U3B. Q1 is then biased on and the tOC LED, E l , iliuminates. The capacitor C27 makes sure the LED is lit long enough for the human eye to see it. a1 S B (Signal Presence Bndicnfiow) U1A and D3 serve to rectify the amplifier output signal. U1B takes this rectified signal and drives t h e LED, E3, which illuminates any timg there is signal pre~ent at the autpkdt of the amplifier channel, Dynamic Range With t h e switch 51 in the Dynamic position, this rectified audio signal is placed on the invsrtin~inputs of a sequence of window comparators.This signal is rectified but unfiltered, therefore it contains ah@peak value of %heaudio waveform, U3C,U3D, USA, U5B and U5B serve as the current sources for the five Dynamic Range LEDs. R29,R 3 t R33, W35, R37 and R39 provide a resistor dropping network for the inverting inputs "lathe LED drivers, This same reclifisd signal is placed an the non-inverting i~lputsvia the filtering Function of C3 and the opamp,U1C.This filtered sigr~alis of an RMS value, With the nan-inverting inputs receiving the RMS value, and the inverting inputs receiving t h peak ~ value, the autpull of each LED comparator equals the dynamic ranga of tha signal, Output Leved With the switch, $1, in the Level positian, the peak signal is still placed on the inverting inputs af the cornparatsr drivers. A small DC level is piaced ow all of the non-inverting inputs, This DC level serves as a cali$rated reference far comparatofs. W78 calibrates the display balance between the two channels sf the amplifier" 4,9,2 60EP U1B on the display module is the curr@ntsource far the OBEP LED E15, Under normas operating conditions pin 14 of Uf D is a negative vsitags. This allows BY ts conduct and El5 to illuw~inate.A s the ODEP signal drops ts the point wkiiere OBfP limiting takes Circuit Theory 4-7 @crmwmx "-.". S t ~ ~ dReference ia Servjce Manuaf -...- -.,- " "" This page intentianally left blank Circuit Theory 4-8 R@K0 ----.., ...- - Studio Reference Service Manual -...I.....YIIIIIIIIIIllllYllllllYl ,,, ,, , , , ,, Procedures Checkou t8,9 28.0 -10.31 1039 --10"26 10+26 .-.18.28 18.20 21.7 22.2 --16.14 23.3 .-"i.09 25.0 --toO~W 25,6 26.7 2723 28,9 --9.97 30.0 31.1 5,2 Standard initial Cowdltigns Level controls fully clockwise. StereoBMano switch in Stereo. Sensitivity switch in 26 dB fixed gain pasition. It is assumed,in each step, that Ehe conditions of the amplifier are per these initial conditions unless otherwise specified, 5,3QC Offset Spgc; 8 WBC,k 2 rnV lnltial Ce~dttOax~gr Controls per standard, mputs shorted Preeadurs: Msasure DC voltage at the sutput canncctors (rear panel). There is ns adjustment for output offset. If spec is not met, there is an afectricai rnaifunctian, Sligh8fyout of spec measurEment is usually due to U"iQiU204 0165: of tolerance, 5.4 Output Bias Adjustment Spec: 300 ta 320 rnVDC, ilnitiall Gandstiaa$::Contrais per standard, healsink ternperatare less than 40°C P~oeedurs:Measwe DC voltages or? the output module across R02,adjust R26 if B-eecessary,Measure DC voltages on t h e output module across R21, adjerst R23 if necessary.Repeat for second channel. 5.5 ODEP Voltage Adjustment Spat: Bias Per Chart, ~ 6 , 4 VDC. InltiaiP @oiaridition%:ContnaSs per standard, heatsink at room temperature 20 to 30°C (68to 86°F)" Note: This adjustrnerr"rh8ufd nsrmaliy be performed wilhin 2 r~rintsts% 07 turn an from ambient (esfd) cornditions, If possible, measure healsink temperature; if not, msasure ambient room temperature. Use this infarmation when referencing the $.a/lawingchart, mcrmwn* -,.- --8,9l -.9+86 -9.80 -9.94 -9.69 32.2 -9.63 1Qs?4 1Q,$39 1O.W 9.97 9.91 9.86 9.80 9.44 9-69 9.63 -ODEP Proe8Bure: Measure pin 3 of 3500and, if newssary, adjust R121 to obtain V,, a s specified above. Measure pin 3 of J700 and, if necagsarx adjust R22t to obtain V ,,,,as s~ecifredabove, +OOEP ~rocgiite: ~ e a s u r epin 4 of 3500 and, if necessary, adjust R132 to obtain V+,,,, as specified above. Measure pin 4 of J700 and, if necessary, adjust R232 oblasn v+OL)EP as 5,6BC Power Draw Spbc:: 70 Wazrs nmaximkam quiescent. initial Csnditions: Controls per standard. Procedure: With no input s i ~ n aand l BBQ16ad, measure AC line wattage draw. if current draw is excessive, check.far high AC Iim voltage or high bias vsitaga. 5.7 High Line Gutout Spec: Unit goes into standby when the AC line voftage goes ^f 8% to to 12% aabw onominal, lnltial Gondltionsl: Controls par standard. Proeedgre: No load, no signal, Bring up AC line voltage with a variac 10%to 12% high. Far 120VAC units this is 132VAC is 334.4VAC. Unit should go into standby. Adjust R4 sn the control module if neees- sary. 5.8 Common M o d e Reje~tion Spac: >70 dB at 1 kHz, initial Cendilions: Controls per standard, Prosgdure: No load, Inject a 0 dBil(.775VRMS), 1 kHz sine wav@into each channel, one channel at a time, wieh inverting and non-inverting inputs shorted togetkaer. Adjust R512 ( C h l ) and RE12 (Ch2) for less than 4,9mVRMS (-44 dBu) at the amplifier output. Elcctrfcal Checkout 5-1 Procedures Gheckou 5.9 Voltage Gain Spee 2666 Gg%n;Gain of 20,8 k3%. Spac 0.775V 5 e ~ % i t l v iREF ~ : I ."---Gainat '508.65 &3%, REF ! i - ~ ~ ~ ~af ~ 68,28 ~ ~ ~ ~~E3a% i n. Spec 1.4V S~nsltivlQ:REF I ---Gain of 5521 &3%. REF t l ----Gainst 37 .SOa3%, Inibtia%lEondlti@n%:Controls per standard. 26 dB Procsduf@:Inject a 0,775VAC 1 kHz sine wave with the Sensitivity Switch in ths 26 dB position, Measure 15.5VAC f0.S VAC at the amplifier skstpu2. 0,775V Prosedut~::Inject a 0.775VAC 1 kHz sins wave with the Sensitivity Switch in the 8.975V position*REF i measure 78 VAC, f2.3 VAC, at Zh@amplifies output. REF I I measure 52.9VAC, ;s;. "1.6 VACt at the amplifier output. 1.@V Bros@dure:lnject a 1,4 VAC 1 kHz sine wave with the S~n~itisgify Switch in the 1.4V position. REF 1 meas u m 778VAC, &2,3VAC, st the amplifier output. REF I! measure 52.9VACFA 1.6 VAC, at the amplifier output* Figufe 5.2DiF@r@nZia$ed Square Wave 5,10Level C~ntrsls 5.12 Slsw Rate & 10kHz Square Wave S@@s:kevef cantroiled by level controls, Inltlairl Conditiows: Controls per standard. Bre@adur@: No Laad, lnject a % kHz sine wave. With level controls fully clockwise you should see futf gain, As controts are rotated eountercixkwise, sbsewe sirniIiar gain reduetisn in each channel, &$hen complete, return !eve8 contrsls $0fully clockwise pssitian, Spac: REF 1 -23 d3 V/pS. 5,lf Current Limit REF I f -1 9 ~3 V&S. lnltrai eondltlo~s:Cantrsls per standard, F~ecedurg:Laad each ~hawwelto 8 sk~rns.inject a 10 kHz square wave at a level of 2 ts 5 volts below clip. Observe the slope af the waveform and catculate the sllew rate, Any ringing must die out in lass than "44 of the period, and its amplitude must be less then 2% aOf %bewaveform amplitude. See Figure 5.3. Spec: REF 1 ---Current fimit at 43 amps, 323 amps. REF II -Current limit at 30 amps, k3 amps, lnrtlal Csndftians: ConWols per standard. Procad&~s:Load each channel ta 7 Ohm. Inject at "I kHz differentiated &ear38% duty cycte) square wave. See Figure 5 % f . Insrease output level until current limiting occurs, Refer $0Figure 5 2 for wave Form. REF f will limit (clip) at 43 vstt peak, 2~3voltss. REF II will limit (clip) at 38 v~iwpeak,k3 volts, In -I Out Figure 5.3IQ kHz Square kVave Electrical Checkout 5-2 Procedures Checkau Prccedure Shed: inject a 6QHz sine wave. REF I output level = 46 VAC. REF I! output fewel= 28 VAC. After 5.13 Crosstalk s~@@: -6048at 20 kHz, Injt[g[ C@nd[tisns:Controls per standard. T~rmi~ai;e input of channal not driven with 800 ohms, P ~ @ ~ @ @ u8Pohm @ : load on each channel, Inject a 20 kHz sine wave into the ehannei 1 input and inereass sutput level to full pawer (REF f =78 VAC, REF 11 =52 VAC)* For REF l measure less than 78 mVAC at the output of channel 2,For REF si measure less than 52 mVAG at the output of channel 2. Repeat by injecting the signal into channel 2 and measuring channel 1. 5.14 Output Power For 12@V@@Hzenftg: Spec sf 8 OAm Stereo: REF I z 780W a"lQ.62%THO, REF fl 2 355W at 8,82%THB. Spas st 4 Ohm S ~ ~ P BREF Q : I r 1'I60W at O-02%THD. REF if a 555W at 0,02%THD, Far lntsrnatignal50Hz unl%: %peegt 8 Ohm %tare@:REF Ii a 7750W at O,S % THD, REF I f a 355W at 0.19& TWD, spec af 4 Ohm B8t@reo:REF i 2 1095W at 8.1% I H D . REF : 1 2 535W at 0.1% THD, Inlt%alC@@difi@~$:: Controls per standard. Proced~re:Load each channel tea 8 ahrns. lnject a 1 kHz s i n s wave and measure output power?at speeified TWD, with both channels driven. Next, load each channel to 4 ohms, Inject a 3 kHzsine wavg and measure output pawer* at specified THD, with both channefs driven. Figure 5.4Inductive Load Cojd 5,15 RsaeSIve Loads Spge: No oscillations. Safe with ail types of Soads. llnltlal C@nd%Olons: Controls per standard. Procadurn Capaeitiue: Load each channel to 8 ohms in parallel with 2 yE Inject a 29 kHz sina wave, REF I output ievei = 45 VAC, REF II sutput level -- 30 VAC. Drive load for 10 seconds>No oseiliations. P r o e e d ~ Onductiv~: r~ Load each channel 1s 8 ohms in parallel with 159 yHenriss. Inject a 1 kHz sine wave, REF I output level = 36 VAC* REF f I satput Ieval = 28 VAC, See Figures 5,4 and 5.5 for typical wavsform shapes, Test duration is 5 sscsnds. ProseBure To@uf@:Load each channel with Zhs primary (red and black Beads) sf a PSU transformer $D704051,inject a 20 Hz sine wave into each channe!, REF I output level = 40 VAC* REF 1 1 output Ievd -- 375 VAC. Observe 3 to 7 flyback pulses in both polarities, Test duration is 10 seconds, See Figure 5,6far typical waveform shape, I Electrical Checkout 5-3 Procedures Checkou 5,16 ODEP Limiting Spss: No ascillatisn on ODEP Limiting wave form\ QDEP LED dims and Is out as the amplifier starts QDEP fimiting.Either channel esntrols limiting in ParatiefMoue Mode. initsat Con@itlong:Centrals per standard; rag or other obstruction blocking fan so that it does not turn. Ftacedufe:: Load the amplifier to 4ohms ou each channet, Inject a sine wave with the same frequency as the AC power line. REF i output level .-- 40 VAC. REF I! &a~fpkifleve1 = 28VA6, After a few minutes observe a wave form similar to Figure 5'9.Remove the input signal from both channels and ailgaw the amplifier to cogs! for a few minutes. Switch the amplifier ta Paraltsi Mono and remove the load from channel 1. inject the si~nal Ento channel 1 and obsarve that QDEP limiting occurs at the output BE both channels. Remove the load from channel 2, and instail the load an channef 3. Again, observe that bath channels lirnik Return all amplifier controls $0standard initiaf conditions. Remove the fan obstruction. Electrical Cheekoast 5-4 5.17 Mute and Turn On Delal Sp@@: Clamps signal; 3 ts 5 second turn on delay, initisi Coadition%:Controls per staradard, PP@@@$u~@: NO load. inject a 1 kHz sine wave into both channels. Observe the output signal with an assillpascope. Turn the amplifier off with the front panel switch. The amplifier should clamp the signal, not allow it to decay with the pswer supplies. Turn the amplifier back an and observe the 3 to 5 second deiay beforeit comes back out of standby"Note thal both channels may not come out of standby at the exact same time. 5.18 Low Frequency Proteclion $@I@: Ampiifier gwutas for low frequency, InibIail C~nditions:C~ntrolsper standard, Frocgdure: No /sad.Inject a 0.5HZ 12 voft peak-topeak square wave, a 2 Hz "I ppgak-to-peak sine wave into each channel, one channel ak:a time, and ygpify tnat $hechannel driven cycles into standby*once in standbysit will lay to cycle out of standby every 3 to 5 seconds. R ~ QK - -.-. @crownq Studio R@f@f@n@e Service Msnuaf -"<,.".-- "..... <."..<. , , I i f Checkou Procedures 5.19Signal to Ncise Ratio Sgse: REF I 120dB, A weighlsd, REF 11 117 dB, A wwsighbed, of each channel. 5.20 !ntarmeduiali@nai%t@@$a@ 5.24 Turn OH Trsnsients spas: Na dangsr~ustransients. Spec at O dB Oatp~t(Fgil Powsr]: 8.005%. 8p@sat -35 db Output:: 0.02%+ Inltia1 Cowdltlons;: Controls per standard, laitis! GonditisnsX~ontrslsper standard. Pro~8lure:From an on condition, turn sff the amplifier and monitor the output noise at the time of turn 08. 35 dB and measurE less than 0.02% IMD, 5,21 hEB Funstions switch is engaged, ODEP limit, 5.22 Display Set-Up Sp@g;Ladder displays balance each other; OadicaWors oilurninate at output voltages per chart below, initial Gssditlo~s:ConlroBs pea standard. Meter Mode Switch in the Bu%putLeve! positioa. Prosedurs: With the display set to read output Bevel inject a 1 kHz sins wave into both channels of the amplifier- Adjust the level se that the -18 dB LEDs puke an and OM. Adjust R78sn "Ihe display board until the Ch 1 and Ch 2 -10 dB LEDs pulse at the same fraquency* Note: "I"@ complete front panel needs to be disassembled in order to access the display board. Next, verify t h a h e a h indicator illuminates per the chart below. Eiiestrical Checkout 5-5 This page intantiarmally ieft blank Electrical Checkout 5-6 6 Schema Schematics 6-1 Phis page intentionally left bblank Schematics 6-2 Rex 0 --..-."."---"",,~.".- 7,1 General Ilnfo~matian Studgo Referenee Sgrvice Manual , . . , , , .., , ,,, . @CrOUme , 7 7 5 Terms . This chapter confairas il[usiratisns and parts lists for the Studio Reference ampfifi*ers.The parts lists in this chapter are for all mechanical parts and parts not iwcluded on a module (circuit board). Chapter 8 CODtains artwork and parts lists For alf modules. Normal terms are pre-paid, Net-30 days applies to 0111y those firms having pre-established a~caknntswith Crown. If pre-paying, the order must be packed and weighed before a total bill can be estabJisked, after which an amount due will be issued and shipment made upon r@ceipla$ pre-payment, New parts returned $orcredit are subject fs a 10% re-stocking fee, authorization from the Crown Parts Department must be obtained before returning parts for credit. 7.2 Standard md Spe~ialParls Many smaller electrical and elsctronic parts used in ths Studio Wefersnce amplifiers are stacked by, and avaiiabfe from, electranie supply houses, However, some electronic parts that appear to be standard are actually speerial, A part ordared from Crown will assur~ aa~racceptabje replacement.Structural items such as covers and panels are available only from Crown. The Crown Parts Department is not a general parts warehause. Parts sold by Crown are solely For servicing Grown products, I 7.3 Ordering Pads When ordering parts, be sure to give the amplifier model and serial number at-ed include a description and Crown Part Number (CPN)from the parts listing. Price quotes are available on request. 7.4 Shipment Shipment wfif be normally mad^ by UPS or best other method unless you speciQ %,thewise. %hipm.wenlsare made $0and from Elkhart, IN, only. Established accounts with Crown will receive shipment freight prepaid and will be billed, A11 others will re~eiveshipment on a C,O,D. sr pre-payment (check or credit card) Part prjces and avai!abi/ityare S U ~ ~ @to Cc $ hang~ withour notice. 7,6 Illggtrated Pa@$Lists Contained within this section are the illustrated parts lists far the Studio Reference B and I & amplifiers, The electrical and elec"lrsnic parts in ths assembly drawings are referredto by Crown Part Number $@PN),and quantities used are indicated. Thosa parts are also shswn in the circuit schematics {chapter61,and are idoatified there by circuit designation. basis, Crawn P a ~ Department s MailingAddress: PO Bsx 1080 Efkha~? IM USA 46$"s5-100$$ Plant 2 SxWe 19% W, Mishawaka Rd, EQkhaa,%NUSA 48519 Phone: (219)294-8280 $obi E r e : (Ma)M24939 Parts fnfarmation 7-1 crownv - Studs Refercs?r_;le Service Manual,,..,",."--- ,".-"-- - --.Y..._YY_I Parts Information 7-2 "- , , 1 $crew,8-32x .75FLSHD 2 End Cap 3 Handls 4 Screw,8-32 x 0.5 FLTHD 5 Main Chassis 6 Hoidea;Gablo Fishpaper 9 SCFGW,6-32 x .3f 2 QNHB T15 8 #8 Star Washer 9 DPDT On/Off Push Button Switch 10 Screw,6-32 x 318 PNHO TrI Covers, etc. 31 SCWW,4.40 x 395 OnlBfF Switch 22 Screw,6-32x .3125 Display 13 Dtsplay Module, REF I End Cap Handlss Display Brkf Display Module, REF I I 14 Pot, 5K ohm Linear 31 Det. 25 t solatsf?LED Foam 16 Display Bracket 37 Front Pane!, Top Extrusion 18 Overlay, REF t Overlay?REF i l 19 Air Filter 20 Screw!8-32 x -37 WDWB 21 #8 Star Washer Btm Extrusion 22 Front Panel, Bottom Extr~aion 23 Finger Gr~ard Sub Front 24 Knob Level Set Screw, 6-32x ,I8 Level Knobs Not Shown Screw, 8-32 x .5PNHD Taptits Mandlas 25 Push Button On80ff Parts Information 7-3 @crawm* -..- . Studio Referer7ce Service Manual - 1 . *.11 m . - . RevK0 P Parts information 7-5 @crown* . p " s . - " - p - Parts lnfsrmatiorl 7-6 Studio Refergnee Service Manual --,.-P, ,, P " Studio Reference Service Manuaf Screw, 8-18x 1.375PNWD 8$1018%10822 Main Madufe Spacefx3 7 5 Toggle Nut Plastic Board Support, 7$8Lock Screw, 6-32 x -3f 2 Par? Hd. T15 Clamp, TO-22On8-3P Output Assambly crew, 6-32 x .56 Washer Head T ? 5 1 x .625 Rubber Grommet Back Pan& Assembly W8sher8 112 Steel Power Transfarme& REF 1 POW@% Tran~forrner, REF I! $crew, f 12-20 x 4 Hex Cap I I i Parts information 7-7 @Crownx -...- Studio Reference Service Manua$ ,,, ,, , , , , , , , , -,-." .,.p" Rev+0 p u Back Pane Bask Panel Plate Shield, Circuit Breaker Screw, 8-32x 38 PNHD Screw, 6-32x .25 WasherEW6 lnt, Shar REF I Circuit Breaker$30A REF I! Circuit Breaker) 288 Strain Relief Pip Cage Assom bty Dual Binding Past, Gald PItd Jumper, 2 Position Wire, # I 2 BLK 22 in, Wire, #I2 BkK 15 in, Wire?#12 RED 20 in. Wire, R 12 RED 13 in. Solder Lug, #8 Hole Jumper, Four Output Ground PIP-FX input Connector Washer* #8 Star Screw, 8-32 w 37 RDHB A f W86-70806 REF I Power Cord, 10-3m30P A1 1993-Q587F REF II Powss Card, 12-3Wd15A Parts Information 7-9 SCYGW, 8-42x "332T I 5 NPN Power Transistor$REF I NPN Power Transistor, REF II PNP Power Transistor* REF I PNP Power Transisto6 REF II Meatsink with Fins, REF I Haatsink with Fins, REF f t Sil Pad, 237 x 1457 7 Mil Parts information 7-7 f Pa& Infarmalion 7-12 -Rev" 0 * -,--,,,.. "...-,, Studio Ref@r@bac@ Service Manual , , - , . " . - -% , , P @ c r o u m-* -* Capacitor, 6300yF 150V (REF 9) Capacimtail, 406300pF 186V (REF I!) Shoulder Wssk-rer Washee; "Id" 'Believille Spring Lack Washer* #I0 Inl, Tooth Wire, W16 Blue (Gh 1) Wire, #16 Blue (Ch 2) Wire, #16 Wed (Ch I ) Wire, #I8 Red 46R 2) Screw, 10-32x .5 A f 0088-27008 Parts Informatian 7-t 3 Parts informahian 7-14 mcrawm, ".".".-."".- pp,,.-.~.. Studio Man~~sf ---- Reference Service ---- ~-"-".~..."...,~ ....,". This page intantionalty left blank Parts Infarmatian 7-f 6 --- Rev. 0 Studio Refereace amplifiers, there has been several updates and revisions. list:af madules is comptete up tu this date,August 1996. output module built on PC board P10423- Csntrst Msduie: I.% on PC board O 8165A7. . For parts list see page Fallowing the module information is the parts list for each mada6le. Iwctuded in the parts list is a map isca,, kt on PC board O 8853Far parts Iist see page itt on PC board D 9099-9. nation. Belaw is a code ts help detarmine what type af part each designatloas is: C = Capacitor D -- Diode E = LED HW -. Hardware J = Sack& or connector K -- Relay L z Inductor N = Resistor Netwark For parts list see page display module built an PC board D 79486. For schematic see For parts list see page 8.3 Studis Rsfe~enceIIModute Informatisn Main Module: P = Terminal - Q .-- Transistor R Resistor S -- Switch TP -- Test Point U = fntegrated Circuit -- M i s ~ , X Z z on PC board B 8688-Q, FOBparts list see page marn moduls built on -7,For schsmalic see :st see page 8-28, Jumper output module built an them wwil be two map iocaklans,The first for channel 1 and the seesnd for channel 2. PC bsard P10423- ~antralfnadui@built on PC board D B"I5SA4. For parts list see page Far parts list see page 8-2Studio Wef@rsncai m@d@!@ fnfarmatlen m - 2c~nlralmodule built ou PC board D 9099-9. For schematic sca . For parts list see page Main Module: see page 8-2. It on PC board D 9940Far parts list see page Module Information 8-2 . .. E 100/200 C 9857-1 EIQ1/261 G9857-1 Wed LED Wed LED J5/F5 J6/F6 C 8812-7 C 883 2-9 C 8812-7 C 8832-7 5.5" Cable Tie 5.5" Cable Tie 5+5'T~abie fie 5.5"Cable Tie A5 J2 C 4508-5 J 100i200 C 8432-4 J 10OXf200X C 6778-2 16 Pin IC Ski. 3CondPhJk PhJkCsver 7,75"I2pin Gbl 2.5" 12pin Cbl H4 11jG1 I1BG1 HW16 HW17 HW48 HW29 3580 D 8395-2 J600 J7QO J8QO B 8397-8 B 8399-8 D 8395-2 B5 N5 65 0% N5 2.5" 12pin Cbl B5 7,$5"12pin 6bl A5 N101B201 D 8248-3 7 pin Rss Net N3021202 B 6082-8 Res Net-C N3 81A1281A --- NsW~sed--N 1Ol&/201B --- Not Used --N102C/281@--- Nat Usad --N101Dl201El Not U5ed NJ 01E/2QS E --- No%Used --N 1QIF/20I F ---- N QUsed ~ ---+,++ PI P6 ~ 1 1 *I+ @ 7593-4 e 7593-4 PI2 --- Nc~tUsed --- 5pas H ~ a d e r H2 3pas Header H2 ~ p o Headef s H5 P101/201 C 7592-6 4pos Header C 8418-3 64 3 ViFI AJ0265-18021 10Ml% A?Q265-"IQ521 18.5K1% --- No%Used --A 10266-433"143K 5% A.dO265-7502W5M 1% --- Not Used ----- Not Usad ----- Not Used --A ?0265-75021 75K 1 % A16266-433? 43M 5% A10266-2872 2.7 5?&.5W --- Not Ussd --A18265-10273 f,62K 1% Al0266-5111 5105% A10265-28523 20.5K 1% 1W A"f025-226711 2,67K 1% A"IQ25-26911 2.6'7K l % Al0265-"11821 I 1.&K 7 5% 8%0266-683t 68K 5% AI8266-8212 8205% A18266-9"11 9"Q% A2 0266-6831 68K 5% A18265-11821 31+8f% A10265-4992Mg9.9K^6 % AlQ265-48"$1 J4,87K I % AlS266-1521 1,5K 5% A"BQ26-5141 51QK 5% A10266-335t 3.3M 5% A1 6266-4931 47K 5% A1 0265-40281 48% 1 % A10265-12?11 1,21K 1% A10265-40201 482 176 C 5062-2 10BK LIN P8T A 10266-274 1 27BK 5'h A 10266-2832 20K 5% .5W $tud8'8 Refe:rt;1sA)~e Service ManuaI 8 Madu R 124/Z2 410266-682t 6,8K 5% 91/A1 R125/225 AI0266-1011 1005% 02/A2 8126i228 A10266-1811 1005% Q2dA2 R127/227 A10266-6821 6,8K5% N3jA3 R1281228 A1 0266-1 331 13K 5% N2/A2 R 1298229 A10266-104 " iOOK 5% N3iA3 RI30/236 A10268-704 l l ODK 5% h31D3 R131/231 A10266-1331 13K 5% %3/D3 R f 32/232 C 5062-2 1BQKLfNPOT Kt/E1 R 1331233 A1 0266-2741 27QK 5% M2/E2 R1341234 A10266-2032 20K 5% *5W Mag131C3 R"I3/233 510268-101 1 I00 5% K24E2 R"161226 A"I2266-682 1 6,BK 5% 12/02 R137j237 A10268-1011 1005% K2/E2 R1381238 A10266-6821 6,8K 5% t3$D3 R1391239 A"38266-821j 820 5% M4/A4 R140/240 A18266-9107 9"1% M4/A4 R141f24f Al0286-1541 150K 5% N3fA3 RS 42/242 A10266-1541 150K 5% L3$D3 8 43[243 a?0266-4713 470 5% K6fD6 R1441244 A18266-471-470 5% M5$05 R1451245 A1Q266-4711 4705% KGIEB W 1461246 A1Q265-11821 I 1<BK1% 04/84 R1476247 A1 0124-24 #24 Buss Wire 05/05 11 2K 1% W 148j248 A18265-290 M4BC4 W149$249 A16266-3012 I Q 8 5 % . 5 W L5fA5 M4IA4 R 7 50/250 A 10265-200"r 22K 1% W151j251 AI8265-11821 1"I,8K1% L4$A4 021A2 R1521252 818265-31827 "Bt8K1% W153f253 AlO-i24-24 JSt24BussWire J4B63 R354/254 A"1066-5603 56 5% K5/D5 R155f255 A10266-4731 47K5",'0 J4%F4 R156/256 Al0266-1321 f.3K5% N2dA2 R157/257 A10266-1322 1.3K5% &2$D2 R1588258 A10286-9221 9 , I K 5% K2BE2 W '11591259 A10266-1331 13K 5% J3/F3 REOR26 AA18266-5601 56 5% K6ID6 R1611261 A10266-4701 47 5% N3/B3 Rl62/262 A18266-4701 47 5% N38B3 R163$283 Al8286-5601 56 5% K5$D5 R 1641264 A10266-4711 4785% K58D5 R165/265 AZQ266-4"$1 1436 5% KS$D6 W1661266 AWg3266-4711 4785% K5fD5 W^969$267 A10265-10811 1K1% 02BA2 W "168f268 A16265-95301 953 1% 02IA2 R 3 69/269 AS 6266-"%41 I OOK 5% N3dC3 8170/270 A10265-"i611 1K 1% &&3/E3 W "i'8$271 810265-95301 953 1% M3gE3 R172/272 A10266-1041 1OOK 5% M68131A3 R 17312"$ 3A1 8266-560 1 56 596 K5f D5 R"B4j274 A"18025-1072"1 "f07h.I:1% 121G2 Rf75/275 A10265-26911 26fM1% H2/G2 Module information 8-4 R176/276 818365-10721 "i BK 1% Rf77J247 A10265-66411 C.04Kls W?79/279 Al8266-'4321 1.3K5% R180/280 Al8266-4711 470 5% R181$28t A10285-48711 4.87KlYo RI82/282 A1 0266-2201 22 5% R183/283 A1 0266-4731 47K 5% R1841284 A10266-4741 49OK 5% R185/2$5 A10266-4731 47K5% R1861286 A1Q268-2751 2,7M 5% W187/289 A10266-3321 3.3K 5% R 1881288 A 10266-3321 3+3K5% R"r89/289 A10266-2731 27% 5% RlgQ/290 A1 8266-2851 2M 5% R191f291 A1Q266-4731 47K 5% R"B921292 A1O266-4731 47K 5% R193/293 A t 0265-20021 10K 1% R194j294 A18265-20821 20K 19& R195/295 A18266-4701 47 5% R 3961296 A I "166-3921 J,9K 5% W1971297 A1Q265-10821 18K1% R1988298 AlQ266-3921 3.9K 5% Rj991299 A18265-?O$k27 ?OK 1% 8508/686 A 10266-304 1 38OK 5% R5&31/6Ol A10266-3847 30QK5% W5021602 A f 0266-3043 300K 5% R5Q3/'sQ3 Al0266-4382 47 5% *5W R504/@$4 A'40266-5143 5 % O K 5 % WS05$685 A 10266-514.E. 510%5% R506/6g86 A18266-1521 ? .5K 5% R507/607 A10266-4915 4785% W5084688 A10266-2731 27K 5% W509%669 A10265-49911 4.99K1% R516/610 830265-49933 4 99M 1% R511/@1"8A30265-4993 1 4.99K '8% R5 12/612 C 9079-2 2QQd220Pot R5331613 A18265-49911 4.99K 1% R514f614 C734o-0 24 5% 3W W515/61S AlQ266-1821 1,$M 5% R516$6%8 A18266-1851 1M 5% R517/617 810268-9181 915% R5181618 Aj8266-9181 925% R5%9$619 A18265-121"t L2IK 1% R528/620 A10268-1521 1.SK 5% R52V621 AfB265-11021 41!%1% W522/622 A10266-4741 47OK 5% W5231623 A10266-1 521 1.5K5% R524/624 A10266-4741 478K 5% W525$625 A 10265-11821 1"I1% W5268626 A%0265-18023 1OK 1 % W527/8%MA00266-3921 3.9K 5% R5281628 A18265-10021 1OK 1% R530/630 A10265-16821 1OK 7 % W53 9 j63 1 8'10266-493" 1 9 K 5% W532/632 A10265-1002U OK 1% R533/633 A 10265-3 QQ2"i "IO K Ya R534$634 A 10265-li 0021 10K 1 % 8535j635 A10266-1R01 1 5% R538{636 A 18266-4701 47 5% R537g637 A10265-J0021 1OK 1% W538[@38 A1Q265-'50821 ?OK 1% R539/639 --- Not Used --R540!64&8 --- Nst Used --WS4 4/64? --- Not Used --WS42/642 --- Not Used --R5438643 --- N ~ " k ~ s e--d R544/644 A"12266-2831 20K 5% R5458645 Af 0266-2031 20K 5% $2 53 $4 TP 1 TP2 Ul01/201 C 641 1-0 tJ f 02/202 C 4445-2 U 102X/%B2XC 3456-1 H1 C 7325-1 G 7960-5 C $781-6 BPBT Switch 3 Pss $witch 6P3T Switch C1 C $564-6 C 6564-6 'd6P Header 16P Header tS B5 HZ MC7915CT G% Hf1C2 35$E5 LM339N 15/G5 14 pin IC Skt 15/G5 U183/283 C6910-1 UPA78 U 1041204 @ 7558-7 MC33079P U l04X1284X r5: 3450-1 14 pin I@ Skt U 10QBj30QB --- Nat Used --U"i03BiS203B --- Nat Used --- L21D2 it3fF3 --- Not Used ----- Not Used ----- Not Ussd ----- Mot Used ----- Net Used --- PC Board D 8825-8 ar D 8920-7 134F3 N2/B2 L2/D2 D1 CI C1 C2 C2 Main #2 Main 443 Module lnfarmaf ion 8-5 This page intentionally left bDank Maduie Information 8-6 Rev" 0 8 Modu ormation 12 Pin Header J3 "'UP47NPN 14 2SC4029 NPN E5 C05 C 6806-1 COG CJ0 C 6886-f C 6887-9 C 6810-3 @ G889-5 C 6807-9 GI2 C 6886-7 --- Nat Used --- C67 COB C09 el 1 C13 .Q1&aF186V .OfgF10OY .001vF106V 180pF 166V 220pF l 0OV .881pf 1QQV .OlpFlOOV 2SA1559 PNP J5 2SC4029 NPN G5 2SA1553 PNP H 5 2SC4793 NPN F4 TIP47 NPN F4 2SA4837 PNP 14 34 G4 F3 E3 J3 14 14 --- No$Used --- A10266-8803 68 5% F4 AJ0266-18'11 1865% E4 5.6 5% ,5W FP F3 1005% 5,65%5W A"18266-2R74 2,75% 2W A 10266-6801 68 5% AIQ266-2R74 2.75%2W A10266-1011 HW1 A 10894-2 HW2 HW3 HW4 HW5 HW6 A 3 0094-2 A 10094-2 A "1094-2 C 748 1-2 HW? HW8 HW9 HW?6 C 7481-2 A 10668-3 A-f 0608-3 A 16608-3 A I6608-9 #4 Lockwashcr I 1 #4 Lockwasher It #& Lockwa~herG2 #4 Lockwasher @ 2 4WayConnh ill 4 Way Conn. G2 4-40x368 SPCT 1 0 4-48x318 S P C ~11 4-4OX3i8 Spcr 62 4-40x388 Sper G2 HW?2 HW13 HW14 HWf 5 A 10020--8 A '4 0020- 1 A 10020-f A 10020-l 4-40X.25 Stud I I 4-40X,25 Sf~d II 4-40X.25 Stud G2 4-40X,25 Stud 6 2 LOO LOl D 7701-2 C 35 30-2 LO2 6 35 10-2 2.S~l-4Csi! G2 470pH Choke F4 490pH Choke J4 $4 H2 CC1 J4 MaBZ-I 5*65% .5W FP F1 AIQ266-13331 "B3K5% A'I 8268-222"F2.2K 5% F4 A16266-3911 G4 14 F3 D3 3985% A16266-1331 14K5% A10266-510"%51 5% A18265-10261 1625% 5.65%5W --- Not Used ----- Not Used --- G2 @t --- $?$at Used --- Ct B1 A10266-,1RO2 1 5% .5W A18266-1882 1 %%,5W K4 D4 Module Information 8-8 It It It R43 R44 R45 R46 847 R48 A18268-5101 51 5% A10266-2021 2K 5% A18266-7511 750 5% --- Not tlsed ----- Not Used ----- Nat Used --- I 6 Ohm Jrnp O Ohm Jmp O Ohm Jrnp Q Ohm Jrnp 0 Ohm 3mp Q Ohm Jmp 8 Ohm Jmp O Ohm Jrnp 8 Ohm 3mp 0 Ohm Jmp 8 Qhm Jmp 0 6Rm Jrnp O Ohm Jrnp 0 Ohm 4mp 0 Qhm Jrnp 6 Ohm 4mp 8 Ohm Jrnp O Ohm Jmp 6 Ohm Jmp Q Ohm Jmp O Ohm Jmp O Ohm Jrnp Module In.lormatisn 8-10 @crawmz Studio Reference Service M3nua$ R ~ 0K pm m. o , , , , , , , , -"."_ .-p 8.6 04318383 Control Msdule Pad$ List G1 Ct C2 C3 64 @5 66 C 6804-6 C 6696-9 C 78 19-3 C 7829-3 C 5362-6 C 5362-6 c7 e 9943-9 C8 C9 C 9943-9 ~ 1 0 CI1 C12 C13 B1 D2 D3 04 D5 86 87 88 DS Dl0 D11 012 Dl3 014 Dl5 Dl6 D?7 018 D19 D20 027 D22" D23" 024* D25' E2 E5 T022Q HTSNK A4 TO228 WTSNK E2 TO220 HTSNK E5 6-32 Hex Nut 8-32Hex Nut @ 9943-9 9943-9 C 8804-6 C 6804-6 C 8963-8 e C 2859-4 C 2851-1 G 2851-1 6 2851-1 C 2851-3 C 2851-1 C 2851-1 f2 285-8-1 C 2851-1 C 3181-2 C 2851-1 C 3781-2 C 3781-2 C 3381-2 C 3181-2 C 3181-2 G 2851-1 G 2859-1 G 3549-0 C 3181-2 C 3181-2 C 10437-9 C16437-9 @ 16437-9 C16437-9 3.3pF 50V TQ220Spre~dsrA4 TO220 Spreader E2 TO220 Spreader E5 Wires H5B 15 F5 18OOyF35V 2.2yF 50V 2.2uF SQV . I VF 2 5 0 ~ . I pF 250V .1pF 258V .I YF 2 5 0 ~ .1 PF50V .lyF5QV .47pF 250V Molder C 4508-5 C 4508-5 C 4508-5 C 9442-2 F34 1N4004 1N4Q04 1N4084 1N4004 1N4004 1M4804 1N48Q4 1N4004 2 N4004 1N4j48 1 N4004 IN4148 t N4148 IN4148 IN4148 IN4748 1 N4004 1 N4004 1N961B, 1BV 1N4?48 fN4t48 Bridge Wect, Bridge Wect. Bridge Rect. Bridge Reel.. E4 16 Pin Sockst A2 --- Not Used --- 16 Pin Socket A1 16 Pin Socket C l "i Pin Conn. 14 82 C 9787-0 C 9787-0 C 9787-0 30A 24V Relay E3 30A 24V Relay G 1 30A 24V Relay G2 .25Tab ,25Teb 25 Tab -25k b -25Tab .25 Tab .25Tab ,2%Tab .25 Tab .25 Tab 5 Pin Header 4 Pin Header 2 5 Tab '25 Tab C3 HI II A3 A4 "Nst included with module, order separately* C 8960-4 58hmPTC A10265-82521 82.5K 15% C 3893-9 1OK Helitrim A28265-18031 IOOK 1% A16265-30031 WOK%% A1 0266-3351 33K 5% --- Not Used --A10266-3921 3,9K 5% A10266-2221 2,2K5% 810266-2221 2.2K 5% A 10266-4733 47M 5% G4 04 84 H3 H4 D4 D4 03 D% 61 04 Module informatian 8-11 @CTaWm8 -. .".--- Studio R@fef@nce Service M38-sua$ -25 Tab "25Tab 2 5 Tab 25 Tab REF Control Module infarmation 8-32 HI HI 11 1% --- Rex 0 I S Module information 8-13 R@K 0 Studio Referenee Service Manual Loe -- e 84 F1 C 6510-9 C 6510-9 C 6541-4 F5 E2 C 6541-4 04 @ 6541-4 E5 H43267-6 12 C 8982-8 H2 H2 12 e4 C3 H4 6-32 Hex Nut E2 6-32Hex Nut E5 TO220 WTSNK A4 TO220 HTSNK E2 "TO226 HTSNK E5 TO220 Spreader A4 TO220 Spreadsir E2 TO228 Spreader E5 Wires H5 & f5 Holder G4 A1 0102-5 A1 0102-5 651s-9 "i Pin Socket A2 "1Pin Socket Al 16 Pin Sseks"l1 15 Pin Conn. 14 --- Not Used -B2 gl= 4588-5 @ 4508-5 C 4588-5 C 9442-2 1N4004 1N4084 6 3787-8 C 9787-0 1N4004 1N40Q4 1N4084 C 9787-0 3BA 24V Relay 38A 24V Relay 308 24V Wejay .25Tab -25Tab .25 Tab .25Tab 25 Tab f N4084 1N4004 ^4 N4804 1N4064 IN4148 1 N4004 1 N4148 .25Tab f N4148 .25T8b 1N4I4$ IN4248 1N4148 "i4804 1N40Q4 1N961B,1OV IM4348 1 N4148 Bridge Rect. Bridge Reet, Bridge Re@%. Bridge Rect, "Nst included with module, order separately. HW1 HW2 HW3 HW5 Ht&6 HW7 HW1O A 10086-"106656-32X03725 A4 At 0086-10605 6-32X.3 I 25 EZ A '4 0086-10605 6-32X.3 11 25 E5 A 18094-4 #6 Lockwasher A4 A t 0894-4 #6 Lock~askerE2 A 10094-4 #6 lockwasher E5 A 4 Q"IQ2-5 6-32Hex Nut 4 4 G3 GI G2 -25 Tab 2 5 Tab .25 Tab 5 Pin Header 4 Pin Header -25 T i b .25Tab G 8960-4 5OhnPVC G4 A10265-82521 C 3093-9 A10265-16091 A"16265-10831 A"iQ66-3331 --- Nsk Used --- 82.5K1% D4 04 898266-3921 A1 0266-2224 441 0266-2221 A1 8266-4731 1OK Hsiitrim 1OOK 1% JBBK 1% 33K 5% H3 H4 D4 04 3.9K5% D3 2.2K 5% 2,2695% 02 C1 47K 5% 84 Module information 8-14 52 6 7325-1 BPDT 62 LM339 C4 f 4 Pin Socket @4 MCSBl5CT E2 E5 F4 MC7915CT MOC3011 -25Tab "25Tab 2 5 Tab 25 Tab PC Board D 8853-0 REF Control 82 HI HI I1 I "& 8 Modu nformation R ~ 0K . -- , 8 8 843504-2 Gontrgl Mod@!@Pa@%kist m&t& C? C2 C3 C4 C5 G6 @7 C8 CS CIS C11 C12 C13 C14 G15 C1G ~ f 7 C18 &51 02 D3 84 D5 D6 07 D8 09 Dl0 B1"I 012 D13 814 Dl5 B16 Dl7 D18 Dl9 028 0 2I 022* D22X 822XX D23" D23X D23XX 024" D35" @Grown" Studio Reference Service Manual 4-6 C 6096-9 C 7819-3 C 7819-3 C 5462-6 C 5362-6 C 9943-9 6 9943-9 C 8554-5 C 8554-5 C 8804-6 C 6804-6 C 8963-8 C10326-4 C18325-6 @ I 0325-6 C 8554-5 C 8554-5 C 2851-1 6 2851-3 C 285f-1 C 2851-1 C 2851-1 C 2851-1 C 2852-1 C 2856-4 C 2851-1 C 3181-2 C 2851-1 C 3181-2 C 3183-2 C 3183-2 @ 3181-2 G 31852 e 2851-1 C 285'5-1 C 3549-0 @ 3181-2 c 3e1-a C16437-9 C 7817-7 6 787 7-7 C10437-9 C 7817-7 C 78327-7 C7 0437-9 C10437-9 .JpF 56V 3,3pF50Y 18QQpF35V F2 2.2pF 50V 2.2gF 50V . I y F 25QV "1VF 250V .22yF250V -22~F250V 1VF 50V .1y F 58V ,47pF258V fpF 350V 2288pF 25QV 2280pF 25QV .22pF%5QV .22p%25QV HWI HW2 HW3 HW4 HW5 HW6 HW7 HW8 HW9 HW1O HWl 1 HW12 A 10086-10605 6-32X%3 "32 E2 Tsrq, Spreader E2 C 654 1-4 A 16094-4 #6 Lockwasher E2 8 "%81 82-5 A 16686-10605 C 6541-4 A "f0094-4 A10102-5 6-32 Muf. C 4508-5 16 Pin S ~ c k e t 16 Pin Socket 16 Pin Socket 6 Pin Header 9 Pas Hsader H2 32 HW13 G5 J5 M5 J3 J4 J12 J13 C 4508-5 6 4508-5 C 8537-0 H5 J14 c 10304-1 K1 CJ 0304- 1 Ct 0304-1 H2 92 1N4004 E2 6-32X,3 3 25 E5 Tarq, Spreader E5 #6Lockwasher E5 6-32 Nut E5 A16086-10605 6-32X.3125 G5 6 854 1-4 Tarq. Spreader G5 A "I909-4 #6 Lsckwashai @5 A18182-5 6-32 HEX Nut G5 H4326F-6 Wires 85 A2 Af C1 14 13 K2 K3 C^d6304-1 3QA 24V Refay G4 30A 24V Relay C1 3QA 24V Retay E2 L1 W 43598-4 Choke 1N4684 1N4004 1N40Q4 1N4804 t N4804 1 N4604 1N48Q4 1N4604 1N4148 1N4004 IN4148 1N4148 IN4148 IN4148 IN4348 1M4004 1N4004 $13 .25Tab $14 P75 25 Tab 25 "4"b PI6 .25Tab .2%Tab PI9 P18 $19 PZO P21 P26 P27 P28 P5Q P5f 15 -25Tab .25Tab .25Tab .25 Tab .25Tab 5 Pin Header 4 Pin Header 25 Tab ,25"!?ab 1M961B,lOV C3 1N4148 1~4148 Bridge Rect. 25 Tab 25 Is,b Brtdge Re@!. -25 "Tb -25Tab Bridge Rect, Bf-rdgeRect. *Not included with module, order separately a1 HI 02 Q3 Q4 Q4X 11 81 R1X A4 A3 83 R4 R5 C 8960-4 5OhmPTC C 8982-8 Plastic Holder A10265-,8252'1 82,5M176 6 3893-9 l@rKHelitrim 04 04 A'10285-10031 188K 1% F4 H4 H4 R6 R7 R8 R9 W10 W1"S R32 R13 R14 R15 W16 W37 A10265-"to031 Af 8266-3331 --- Not Used --A10266-3924 A f 0266-2221 A"19266-2221 lOBK 1Yo 33K 5% A10266-2031 A10266-4731 20K 5% 3.9K5% 2.2% 5% 2.2K5% 818266-4791 47K 5% 49K 5% At8266-I021 1K5% A1 0266-4731 47K 5% R28 A10266-3321 3.3K 5% A10286-1231 12K 5% Al0265-11031 lmOKt% AIQ266-4721 4,7K5% A10266-4721 4,7K 5% A4 0286-4741 490K 5% A16266-474 1 478K 5% A18266-2221 2-2K5% A10266-"8812 1885% ,5W A1 0266-3682 3@5% .5W W27 810266-3821 3%5% 832 A18266-5141 R18 R19 W20 R21 R22 R23 W24 W25 578K5% LM339 "B Pin Socket MC9815CT B 9099-9 Module Information 8-18 C4 C4 E2 Heatsink E2 MC7915CT E5 E5 Heatsink MQC3811 1 G5 G6 F4 REF Control Board - OVER V O L T AGE CUT gaFF r--------- I i Studio Refergnee S@ra/iceManua$ R ~0 K - - @CraWma P --- ---rsen LED 27pF 286V Green LED Green LED Graen LED Green LED Green LED 27pF 200V .47pF%k%V .47pF 50V ,fpF 50V . I pF 56V .I pF 50V . l yF 5OV , l yF 58V .1 pF 58V . 1pF 50V .I pF 58V .1pF56V l yF 50V .47pF 50V .47pf 56V .801gF 108V 80I biF 10BV .001pF 1OOV .&CdO'?pyF168V .001pF106V .801yF 1BOV AOO1yF160V -682yF 1QQV ,081yF4Q8V ,081pF 1OOV .1pF 50V * l y F58V J1 Green LED Grsen LED Amber LED D 6990-2 16 pin cable IN4148 1 N4148 IN4148 1N414R lN4148 1N4148 f N4148 "14148 1N4148 1N4148 IN4148 jN4f48 Y~llowLED Veiiow LED Green LED Green LED Green LED Green LED Green LED Msduie Information 8-28 Studio Reference Sewice M~nual 8 Modu @ CraWms ormation Module lnfsrmatisn 8-22 R"14/244 R1458245 W1461246 R 147j247 R 1488248 R149/24S R 150j250 R"11/251 R152/2%2 W 153/253 R 1541254 R"r5!%55 R1568256 R157/257 R1581259 R159/259 W 1G0/2GO RlG"g1281 W 3 62/262 W 3638263 R164/264 W 165628% W "i6/266 W1671269 R 168j268 R"Q9j269 R178/27Q R171/271 R172f272 R 1731273 W1741274 R1751275 W176/276 R177/277 R"%9/2279 W 188/280 R181/281 R %82$282 W 3 83/283 R"i841284 81858285 R1861286 R9878287 R1881288 81891289 R190/290 R"i1/291 8192/292 8193j293 R 1948294 R1958295 8196/296 A1 0266-47"i 470 55% A10266-4713 470 5% A10265-11821 t1,8K 1% G 5868-2 0 OHM A10265-200 f 1 2K 1% A10266-la12 tOO5%.5W A10265-20011 289 1% A18285-11821 11.8K";h A16265-"19W21 11.8K 196 A10124-24 #24 Buss Wire At 0266-5601 56 5% A18266-4751 47M 5% A38266-1321 1.3K5% Al0266-"6321 1.2% 5% A30266-9121 9.1K5% A10266-133W13K 5% A 10266-5601 56 5% 410266-4701 47 5% A 18266-470-47 5% A10266-5601 543 5% A1Q266-4711 478 5% A1 0266-47f 1 470 5% A18266-47 f *i 470 5% A10265-1001UK1% A 10265-95301 953 196 A10266-1041 lOOK 5% A10285-"10011 1K 1% A10265-95301 9531% A"&026-1041 108M 5% A 18266-5601 56 5% A"10265-10721 1%%.7K1% A30265-4644 1 4,64K1"h Aj0265-10721 W0.7Kf% A10265-13021 13,6K1% AI0266-332% "i.9K5% A10266-4711 470 5% A10265-48711 4,87K 1% A28266-2201 22 5Yo A 10266-473 " B 7 K 5% A"IQ266-4741 470K 5% $10266-473% 47M 5% A10266-2751 2.7M5'"gPo Al0266-332t 3*3K5% A10266-3321 3.3K 5% A10266-2731 27K 5% AlQ268-2051 2M 5% AtQ266-4731 47K 5% A38266-4731 47M 5% A10265-1002"f*IQK1% A1 0265-20021 30K 1% A10266-4786 47 5% A18266-3921 3.8K 5% K5/85 J6/E5 04804 05/05 N4/C4 RSQO86OQ A10268-304 7 388K 5% R501f601 A16286-3041 300K 5% L58A5 R5828602 A 10266-3041 300M 5% M4/A4 8503/603 A10266-4702 47 5% <5W L4jA4 R5041604 A10266-1041 108K 5% Q2/A2 R505f605 A18266-1041 100K5% ll3/G3 R506/@06 A10266-1521 1.5K 5% K5fD5 R507/609 A10266-491 t 476 5% l49F4 R508j608 A10266-1041 180K 5% N2/A2 R50Qj609 A10265-49911 4.99K1% ~ 2 f ~ 2 8510/610 A"IQ25-449911 4,99K1% K2/E2 R511/611 A10265-49911 4.99K 1% J3/F3 RS16 ! 2 12 C 9879-2 200/220 Pat M5fD% 8513JG13 810265-49911 4,99K1% MgqB/B3 R514/E 14 C 7340-0 24 5% 3W M3/RS R51586"H $10266-1821 1.8K5% K5/D5 W5 t6BG16 --- Not Used --K5fD5 R5171617 A"&026-9101 Q15% K51D5 W5184648 Al0266-9301 91 5% K4[D4 W519/619 AJ0265-12111 "t.21K 7 % 02/A2 R526$62Q --- Not Usad --O2/A2 R5218621 --- Not Used --N3163 W5221622 --- Nat Used --K3JE3 85231623 --- Nat Usad --K3E3 W524/624 --- No%Used --M38A3 R5258625 --- Not Used --K5fD5 R526/626 A t 0265-10021 1OK 1% I2/G2 R527!627 A10266-392 f 3.9K5% H2/G2 R528$628 A18265-10021 I 6 K l?L 328F2 W5294629 A10266-4731 47K 5% H21G2 R538/630 A18265-"1021 "BOM 1% M4/E4 W531/631 A10266-473"147K 5% M3/A3 R532/632 A10265-10021 "iK 1% M4/84 R533/63J A10265-1002t 1OK f % ek28F2 W 5346634 A3 8265-1002"8 1OK 1% a38D3 K%/D5 04/03 J5/E5 35/E5 J6jE6 J5/E5 J5dFs L3/A3 t3/A3 J54F5 J2/F2 J4jF4 K4JE4 S2 @ 7325-1 $3 6 7960-5 BPDT Switch 3 Pos Switch $4 C 6781-6 6P3TSwitch TP1 TP2 TP3 TP4 @ 6564-6 C 6564-6 10P Header 9 8P Headsr $7'873-0 2P Header C 7873-6 2P Header A102@6-6$21 A10266-1011 Al0266-1011 Al0266-6821 A10266-1331 At 0268-1041 A10266-1842 A10266-1331 6,8K5% 106 5% 7005% 6,8K5% 13K5% 7OOK 5% 108M5% O"I/Al 02/A2 821A2 N3/A3 N2/A2 N3IA3 L3fD3 L3JD3 13K 5% lO0K LIN POT K1/EI At 0266-2741 270K 5% K28E2 A10266-2032 20K 5% -.5W M3iC3 A10286-1611 WQO% K2$E2 A 10266-6821 6.8%5% k2f02 A10266-10"a 1005% K2JE2 A 10266-6821 8.8K 5% t3f D3 A 10266-8261 820 5% M4/A4 A3 8266-1 9 1-% 1 185% M4/A4 A102@6-1541 158K5% N3BA3 ~10266-7543 1 5 0 ~ 5 % t31a3 A 10266-47I 1 4705% K69D6 A1 0266-471f 470 5% K5$DS 816266'9-4711 4705% 46/E6 A1Q265-1182"SI 8K 1% O4/D4 5868-2 0 OHM asms A10265-20011 %K 1% N49C4 Al0266-"rQ12 1005% +5VJ k59A5 A I 0265-20031 2K 1% M4/A4 A18265-11821 fl @MI% L4BA4 A18265-"&382"11 .8K1% 6238A2 AtQ124-24 #24B~assWir@J4163 A10286-560-6 5% K54D5 A10266-4731 47K5% J4/F4 A30266-1321 1,3K570 N2dA2 A10266-1321 1.3K5% 12JB2 A18266-9121 9'1KS?& K#E2 A10266-1331 13K 5% J3$F3 A10266-5607 56 5% K61D6 A10266-4701 47 5% NYB3 A 10266-4703 47 5% N3BB3 A1 0266-5601 56 5% K54D5 A10266-4711 4705% K5fD5 A10266-4715 4705% K5JD6 Al9266-47 13 470 5% M5/D5 A18265-1Q61f t K I % 02$A2 A 10265-9530I 953 1% 82/A2 A18266-1041 100K5% N3BC3 A16265-1001-9 1K^4% Hr138E3 A18265-95381 953 1% K3/E3 A40266-1047 100K5% M3/A3 A1 0266-5601 56 5% K5/D5 A18265-11821 "I.8K 9 2/G2 A10265-48711 487K 1 % WdSG2 C 5062-2 c W1799279 A"i6266-1321 "r3#5% R 180/280 A10266-477*B 4785% W181(281 A16265-48711 4.87K 1% 8182/282 A18266-2281 22 5% R "1338283 A10266-4733 47K 5% R"184j284 A10266-4741 470K 5% Rd 85/285 A70266-4731 47K 5% W 1861286 A10266-2751 2.7M5% R1&7/"$287 A10266-332"13,3K 5% W 1881288 A18266-3321 3.3K5% R 189f289 A1 8266-2731 27K 5% R 190j290 A 10266-205" i 2 M 5% R1918291 A10266-4731 49K 5% R1928292 A ?8266-4731 47K 5% R193/293 A10265-10021 10K 1% W 1948394 A 10265-20021 20K 1 % Rl95/295 A30266-4701 47 5% W 1968296 A 10266-3921 3 9M 5% R1 97/297 A1Q265-10021 2QM 15% R1988298 A"IO266-3929 3.9K5% W199j294 A10265-10821 l O K l % WSQOjEOO A90266-3041 388%5% R5Orlj6Cl A1 8286-3041 300K 5% R50266C2 A10266-3041 3OOK 5% R503j603 870266-4702 47 5% -5W FC504/604 A1 0266-51 4 1 540K 5% R5858685 A1 0266-5941 5"1QK 5% R506/606 A10266-1521 1.5K 5% W507/6Qf A18266-4711 4785% WS68/GQB A1 0266-273 1 27K 5% R509/609 A"1225-49911 4.99K 1% R516/630 A10265-49911 4.99Kt % R51146"r 1 18265-49911 4'99%1 9Q W5 12I6d 2 C 9079-2 2804226 Pat R513/613 A10265-49911 4.99K1% R5 14/63 4 C "7340-0 24 5% 3W R515!615 AlQ26G-1821 1.8K5% R516f616 810266-1051 1M5% R517/614 A1&5266-*B1111105% 8518/618 A16266-1111 110 5% R519/619 8162G5-"H21"1 Ia2^IK1% R5281620 --- No%Used --R521862 f --- NOS.Used --W522/622 --- Nat Used --R523/623 --- Not Used --R5241624 --- Not Used --R5%5!625 --- Mob Used --W526/E26 A10265-tQ02T 5 OK 1% R5276627 830266-3921 3 9K 5?40 R%28/628 810265-36021 10K 1 % 8 Modu ormation Module Information 8-32 aa 000 0aa aaa O-mNahmf3 O O O T y F y y OOCOOOOO O ~ N ~ ~ ~ ~ ~ ~ ~ O ~ O O O O O O O a O O ~ ~ - ~ ~ ~ r ~ ~ ~ W W W W W m & % b ~ e $ d e % m M m ~ ~ E E E E ~ ~ ~ E ~ E E E E E ~ E ~ E E E E K E E K K E E E E E E E 8 Ohm Jrnp O Ohm Jrnp 0 Ohm Jmp O Ohm Jrnp O O k n Jrnp O Ohm Jmp O Ohm Jmg O Ohm 3mp 0 Ohm Jrnp 6 Qhm Jmg 0 Ohm Jmp 0 Ohm Jmp O Ohm Jrnp 6 Ohm Jrnp O Qhm Jrnp O 8hm Jrnp O Ohm 3mp O Ohm Jrnp 8 Ohm Jrnp O Ohm Jrnp 8 Qhm J n p THC #2 8 Modu nformation A@@ Rag $ NPN Figure 8.904338Q-8Bu$ut M o d ~ &M2p Module Information 8-33 5 f u d i ~Refgrenc~Service Manual R43 W44 W45 R46 R47 R48 R49 R50 851 R52 R53 R54 R55 W56 857 R58 R59 R60 R61 Re2 W63 864 R66 Re8 W69 R7B A10266-2231 A10266-2231 A16266-2231 A10266-2231 A"f026-2231 A18268-2231 A10266-2231 A10266-2231 A16266-3971 A10268-3911 A10266-391 1 A10268-3911 A10266-3911 A10266-3911 A 10266-391 ? A10268-3911 A1 8266-39 11 A1 8268-39 11 AIQ2GE-lO5J A10268-1051 A18266-3351 A10266-3351 810266-4931 AIQ266-102% A1026&-5151 A18266-5151 Module Information 8-37 22K 5% 22K 5% 22K 5% 22K 5% 22K 5% 22K 5% 22K 5% 22K 5% 3985% 3905% 390 5% A1 0266-8211 A"i066-"I221 A"B8266-182Al0286-3321 A10266-3321 A1Q265-12VI 820 5% 1,8M5% ,.8K 5% 3,3K 5% 3.3K 5% 12.1K 1% M%Bl 12 MI 12 L1 GI A 10266-474 "I7 OK 5% A10266-4741 470K 5% AlO266-1521 1.5K 5% 410266-I521 f ,5K5% LJ 12 L2 --- Not Used ----- Not U58d --- 61 K2 4905% 390 5% 3985% 390 5% 390 5% 390 5% 3985% 7M 5% 1M 5% 3.3M 5% 3.3M5% 47K 5% 1K5% GI 5.1M55% 5,IM 5% B 7948-8 Display Board Module lnformati~n 8-38 ">

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