CrownStudioRefScrvsManual电路图.pdf

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1、PROFESSIONAL STUDlO AMPLIFIERS Studio Referenc dio Referenee Some models may be exported under the name Asrrrou O 99 8 b y Crown Irternatit:,nal, fnc., P.O. Box t COO, Elkhart. lndizni 46575-?OQO U.S.A. Telephone: 219-244- 8000. Sfudio Refere?-9c:c awplifiers are produced by Crawn fnterrsaticsnal, I

2、nc, xrradernark Notice: Skrdio Reference* and Gronndd bn Importgr (outside North America), Plant 2 S.W, 171 8 W. Mishawaka Bd, Elkhaa, IN USA 4651 7 Phone: (21 9) 294-8200 Tall Free: (8QO) M2-6939 FM: (21 9) 294-8301 Web: .erwnaudiscom Introduction t -7 Sf d i o Reference Service Manual This pa inte

3、ntionally left blank introduction 4 -2 Studio Referenee Service ,Msnual The following specifications on Bode Wajsctlon CMR): Better than 100 dB be- Mode, with an 8 Ohm load, a ted full bandwidth power from 20 Hz to 480 Hz, 26dB, banless stherwise specified. rising tinearly I s better than 79 dB at 2

4、0 kb4z, Low-.DJ Refers to maximum average pawer in watts from 2 0 Hm to 2 6 kHz with 0.1% THB and noise. 2,l PeHormsnee Ftgquency Response: 8,MdB from 20 Hs to 20 kHz at 1 watt. Phase R$pon%: +5 to -75 degrees from 20 Hz ta 2 6 kHz at 3 w t t 8ignai-to-noise: (A-weighted) reater than 120 dB belaw rc

5、ater than 1 3 7 dB below full bandwidth powerh Tat! Harmonic Dldsalon (TWO): Less than 0,02% a 4 rated low-distortion I kHz pswer. Less than 0.1% af rated full bandwidth power, lntsrmoduEIaZlon Qiatagian IMDf: (60 Ha Bull bandwidth power ta 36 watts rising lineariy $a 0.025% at 36 mtliiwatts, Dampin

6、g Factar: Greater than 20,000 from B BHZ to 280 Hz, and greater than 2,568 at 1 kHz. Crosstalk: (At rated full bandwidth power,) S b d i Refer- Batter than 1 0 6 dB from 2 4 5 Hz ta 100 Hz, falling linearly to better than 70 dB at 20 kHz, Betdef khan 180 dB from 20 ME to f 66 Hz, falling tinearly to

7、 better than 65 dB at 20 kHz, Voltage Gin: (With Isvel controls set far maximum ocnt- put,) At the 2 6 dB garn setting, 2Q:h3% or 26 dB 0 2 5 dB, Studio m,n,eL At 0.775 volt sensitivity? I 63: 1 k 12% or 40 dB .- 1 dB; at 1.4 volt sensitfvity, 57: 1 k 12% or 35 dB k 1 dB. S t u d i o - At 0.775 volt

8、 sen%itiviby, - .-. 6 9 : k j 2% a o r 37 dB 41 dB; at 84 volt sensitivity, 38.1 12%or32dB1 dB. 2,2 pa we Pser Bandwidth: (At standard 1 kHz power.) awr, Std8o Refefcnce H: or 26 dB voltage gain, S!WQ mode wifh both cchanne/s drjven: 565 waus pea channel into 4 ohms. Mater OnfBff: A tws-position swi

9、tch behind the front 360 watts per channel into 8 ohms. pane! used to turn the front panel meters on or off, Bridge-Mono m d r 3, f 45 waEs into 8 ohms, 720 wakk into 16 ohms Par8$/-Mono mode: 7,135 watts into 2 ohms. 715 waE% into 4 ohms, Meter Display Mode: A twa-position switch behind the frsnt p

10、anel used to set the display mudc tor ths front panel meters. Display modes include dynamic range af the output signal in dB or output levels in dB. 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

11、kHz) Reset: A two-pltion back panel switch used fa roset the AC mains circuit beaker* Ero made wjtfi both -lhaanne/s drivepa: 1,075 watts per chanaal into 4 ohms. 2,4 lndicatars 768 watts per chaalnel ir3Po 8 ohms. Enable: This indicator shows the on/M status of the units How-voltage power supply Br

12、Bdge-Mf? 2,150 watts into 8 ohms+ 3 , 5 3 5 watts into f 6 ohms. $ 106, 120, 200, 220 or 240 VA6 (k 10%)k/ed s an inverting stage with the input being damping. Studio Reference ampiifiers have damping mp stage. Because gain after this stage in XC$S$ af 20,000 in the bass frequency range. This B (fac

13、tor s f 2Q), greater amplifier sensi- feedback, along with our compensation and u t l 3 - l sd $y csntrosling the ratio of fedback distortion output tapolgy make Grown Studio Ref- nee, The Sensitivity Switch sets the in- erence amplifier superior* put impedance to this stage and varies the gain such

14、 that the overall amplifier gain is 26 dB, or is adjusted Fsattres specific to the Studio Reference include: A or 0.775V ar d.4V input to attain rated high power toroidal Esansfsrmsr; Computer controlad, varjable speed, whisper quiet fan; Built in AC power fiffes; Soft start circuit Z a control inru

15、sh curroot; Fuji ov- ervodtage and internal fault protection, This ampli- tpuX from the VGS is fed to the non- fier can operate in either Bridgge;! or Parallel Mans mode, the Errof Amp op-amp stage through as well as in Dual (stereo) made, A sensitivity switch capacitor $C t 00) and input resistor a

16、)lows seiectian sf input voltage required for rated Gain of 20,8 k3%. Spac 0.775V 5e%itlvi: REF I .-Gain at 508.65 s;. 1.6 VACt at the amplifier output. 1 .V Brosdure: lnject a 1,4 VAC 1 kHz sine wave with the Snitisgify Switch in the 1.4V position. REF 1 mea- Figufe 5.2 DiFrnZia$ed Square Wave sum

17、7 7 8 VAC, e in- put of channal not driven with 800 ohms, PuP: 8 ohm 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 i s measure l

18、ess than 52 mVAG at the output o f channel 2. Repeat by injecting the signal into channel 2 and measuring channel 1. 5.14 Output Power For 12V Hz enftg: Spec sf 8 OAm Stereo: REF I z 780W alQ.62% THO, REF fl 2 355W at 8,82% THB. Spas st 4 Ohm SPBQ: REF I r 1 I 60W at O-02% THD. REF if a 555W at 0,02

19、% THD, Far lntsrnatignal50Hz unl%: %pee gt 8 Ohm %tare: REF Ii a 7750W at O,S % THD, REF If a 355W at 0.1 9 3 ts 5 second turn on delay, QDEP LED dims and Is out as the amplifier starts QDEP initisi Coadition%: Controls per staradard, fimiting. Either channel esntrols limiting in Paratief Moue PP$u:

20、 NO load. inject a 1 kHz sine wave into both Mode. channels. Observe the output signal with an assillpa- initsat Conitlong: Centrals per standard; rag or other scope. Turn the amplifier off with the front panel switch. obstruction blocking fan so that it does not turn. The amplifier should clamp the

21、 signal, not allow it to Ftacedufe: Load the amplifier to 4 ohms ou each chan- decay with the pswer supplies. Turn the amplifier back net, Inject a sine wave with the same frequency as the an and observe the 3 to 5 second deiay before it comes AC power line. REF i output level .- 40 VAC. REF I! back

22、 out of standby Note thal both channels may not : Controls per standard, 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 Spg; Ladder displays balance each other; OadicaWors oilurninate a

23、t output voltages per chart below, initial Gssditlos: ConlroBs pea standard. Meter Mode Switch i n the Bu%put Leve! positioa. Prosedurs: With the display set to read output Bevel in- ject a 1 kHz sins wave into both channels of the ampli- fier- Adjust the level se that the -18 dB LEDs puke an and OM

24、. Adjust R78 sn Ihe display board until the Ch 1 and Ch 2 -10 dB LEDs pulse a t the same fraquency* Note: I complete front panel needs to be disas- sembled in order to access the display board. Next, verify thaheah indicator illuminates per the chart below. Eiiestrical Checkout 5-5 This page intanti

25、armally ieft blank Electrical Checkout 5-6 6 Schema Schematics 6- 1 Phis page intentionally left bblank Schematics 6-2 Rex 0 -.-.-,.- , ., ., , , , , . , Studgo Referenee Sgrvice Manual CrOUme 7,1 General Ilnfomatian 77.5 Terms This chapter confairas ilusiratisns and parts lists for Normal terms are

26、 pre-paid, Net-30 days applies to 0 1 1 1 y the Studio Reference ampfifi*ers. The parts lists in this those firms having pre-established acaknnts with chapter are for all mechanical parts and parts not iw- cluded on a module (circuit board). Chapter 8 COD- tains artwork and parts lists For alf modul

27、es. 7.2 Standard md Speial Parls 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 as- sur

28、aar acceptabje replacement. Structural items such 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 rceipl a$ pre-payment, New parts re- turned $or credit are subject fs a 1 0 % re-stocki

29、ng fee, authorization from the Crown Parts Department must be obtained before returning parts for credit. The Crown Parts Department is not a general parts warehause. Parts sold by Crown are solely For servic- ing Grown products, as covers and panels are available only from Crown. Part prjces and av

30、ai!abi/ity are S U C $ to chang with- 7.3 Ordering Pads I our notice. 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 normal

31、ly mad by UPS or best other method unless you speciQ %,thewise. %hipm.wenls are made $0 and from Elkhart, IN, only. Established ac- counts with Crown will receive shipment freight pre- paid and will be billed, A 1 1 others will reeive shipment on a C,O,D. s r pre-payment (check or credit card) basis

32、, 7,6 Illggtrated Pa$ Lists Contained within this section are the illustrated parts lists far the Studio Reference B and I le Service Manual - ,.- - ,., , . . - , , - Parts Information 7-2 1 2 3 4 5 6 9 8 9 10 3 1 22 13 14 2 5 16 3 7 18 19 20 21 2 2 23 24 Not Shown 2 5 $crew, 8-32 x .75 FLSHD End Ca

33、p Handls Screw, 8-32 x 0.5 FLTHD Main Chassis Hoidea; Gablo Fishpaper SCFGW, 6-32 x .3f 2 QNHB T1 5 #8 Star Washer DPDT On/Off Push Button Switch Screw, 6-32 x 318 PNHO TrI SCWW, 4.40 x 395 Screw, 6-32 x .3125 Dtsplay Module, REF I Display Module, REF II Pot, 5K ohm Linear 3 1 Det. t solatsf? LED Fo

34、am Display Bracket Front Pane!, Top Extrusion Overlay, REF t Overlay? REF i l Air Filter Screw! 8-32 x -37 W D W B #8 Star Washer Front Panel, Bottom Extraion Finger Grard Knob Set Screw, 6-32 x ,I8 Screw, 8-32 x .5 PNHD Taptits Push Button End Cap Handlss Display Brkf Covers, etc. OnlBfF Switch Dis

35、play Btm Extrusion Sub Front Level Level Knobs Mandlas On80ff Parts Information 7-3 crawm* - . . . . . . . . . - Studio Referer7ce Service Manual . 1 * 1 .-.m1.- RevK 0 P Parts information 7-5 crown* -p-.sp. , , , Studio Refergnee Service Manual P - - - , . . - P - Parts lnfsrmatiorl 7-6 Studio Refe

36、rence Service Manua f - - Screw, 8-1 8 x 1.375 PNWD 8 $ 1 0 1 8 % 1 0 8 2 2 Main Madufe Spacefx 375 Toggle Nut Plastic Board Support, 7$8 Lock Screw, 6-32 x -3 f 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 Id Believille Spring L

37、ack Washer* #I0 Inl, Tooth Wire, W 1 6 Blue (Gh 1) Wire, #16 Blue (Ch 2 ) Wire, #16 Wed (Ch I) Wire, #I8 Red 4 6 R 2) Screw, 10-32 x .5 A f 0088- 27 008 Parts Informatian 7- t 3 Parts informahian 7-1 4 mcrawm, pp,.-. . . . . - . . . - Studio Reference Service Mansf - - -., . ,. - - - Rev. 0 This pag

38、e intantionalty left blank Parts Infarmatian 7- f 6 Studio Refereace amplifi- output module built on PC board P10423- ers, there has been several updates and revisions. list: af madules is comptete up tu this date, August 1 9 9 6 . Csntrst Msduie: Fallowing the module information is the parts list f

39、or I.% on PC board O 8 165A7. each mada6le. Iwctuded in the parts list is a map isca, . For parts list see page k t on PC board O 8853- Far parts Iist see page nation. Belaw is a code ts help detarmine what type af itt on PC board D 9099-9. part each designatloas is: For parts list see page C = Capa

40、citor D - Diode E = LED display module built an PC board D 7948- HW -. Hardware 6. For schematic see For parts list see page J = Sack1sA)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 6,8K 5% N3jA3 R12

41、81228 A1 0266-1 3 3 1 13K 5% N2/A2 R 1 2 9 8 2 2 9 A1 0266-1 04 i OOK 5% N3iA3 RI 30/236 A1 0268-7 04 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 A1 0266-2032 20K 5% *5W M a g 1 3 1 C 3 RI3/233 510268-1 01 1 I0

42、0 5% K24E2 R161226 AI2266-682 1 6,BK 5% 12/02 R137j237 A10268-1011 1005% K2/E2 R1381238 A1 0266-6821 6,8K 5% t3$D3 R1391239 A38266-821j 820 5% M4/A4 R140/240 A18266-9107 91% M4/A4 R141f24f Al0286-1541 150K 5% N3fA3 RS 42/242 A1 0266-1 541 150K 5% L3$D3 8 43243 a? 0266-47 1 3 470 5% K6f D6 R1441244 A

43、1 8266-471 - 4 7 0 5% M5$05 R1451245 A1Q266-4711 4705% KGIEB W 1461246 A1Q265-11821 I 1 BK 1 % 04/84 R1476247 A1 01 24-24 #24 Buss Wire 05/05 W 148j248 A1 8265-290 1 1 2K 1 % M4BC4 W149$249 A16266-3012 IQ85%.5W L5fA5 R 7 50/250 A 10265-200 r 2 2 K 1 % M4IA4 W151j251 AI8265-11821 1I,8K1% L4$A4 R15212

44、52 818265-31827 Bt8K1% 021A2 W153f253 AlO-i24-24 JSt24BussWire J4B63 R354/254 A1066-5603 56 5% K5/D5 R155f255 A10266-4731 47K5,0 J4%F4 R156/256 Al0266-1321 f.3K5% N2dA2 R157/257 A1 0266-1322 1.3K 5% h L4jA4 R152/2%2 A16265-19W21 11.8K 196 Q2/A2 W 153/253 A1 0 124-24 #24 Buss Wire ll3/G3 R 1541254 At

45、 0266-5601 56 5% K5f D5 Rr5!%55 A1 8266-4751 47M 5% l 4 9 F 4 R1568256 A38266-1321 1.3K5% N2/A2 R157/257 Al0266-6321 1.2% 5% 2 f 2 R1581259 A30266-9121 9.1K5% K2/E2 R159/259 A1 0266-1 33W13K 5% J3/F3 W 1 G0/2GO A 10266-5601 56 5% M5f D% RlGg1281 410266-4701 47 5% M g q B / B 3 W 3 62/262 A 18266-470

46、-47 5% M3/RS W 3638263 A1 0266-5601 5 4 3 5% K5/D5 R164/264 A1Q266-4711 478 5% K5fD5 W 165628% A1 0266-47f 1 470 5% K51D5 W i6/266 A1 8266-47 f *i 470 5% K4D4 W1671269 A10265-1001UK1% 02/A2 R 168j268 A 1 0265-9530 1 953 1 9 6 O2/A2 RQ9j269 A1 0266-1 041 l OOK 5% N3163 R178/27Q A10285-10011 1K 1% K3J

47、E3 R171/271 A10265-95301 9531% K3E3 R172f272 A&026-1041 1 0 8 M 5% M38A3 R 1 731273 A 18266-5601 56 5% K5fD5 W1741274 A10265-10721 1%.7K1% I2/G 2 R1751275 A30265-4644 1 4,64K 1h H2/G2 W176/276 Aj0265-10721 W0.7Kf% 328F2 R177/277 A10265-13021 13,6K1% H21G2 R%9/2279 AI0266-332% i.9K5% M4/E4 W 188/280

48、A1 0266-471 1 470 5% M3/A3 R181/281 A10265-48711 4,87K 1% M4/84 R % 8 2 $ 2 8 2 A28266-2201 22 5Yo e k 2 8 F 2 W 3 83/283 A 1 0266-473 B7K 5% a38D3 Ri841284 AIQ266-4741 470K 5% K%/D5 81 8 5 8 2 8 5 $10266-473% 47M 5% 04/03 R1861286 A10266-2751 2.7M5gPo J5/E5 R9878287 Al0266-332t 3*3K 5% 35/E5 R1881288 A1 0266-3321 3.3K 5% J6jE6 8 1 8 9 1 2 8 9 A10266-2731 27K 5% J5/E5 R190/290 AlQ268-2051 2M 5% J5dFs Ri1/291 AtQ266-4731 47K 5% L3/A3 8192/292 A38266-4731 47M 5% t3/A3 8193j293 A10265-1002f*IQK1% J54F5 R 1948294 A1 0265-20021 30K 1% J 2/F2 R1958295 A10266-4786 47 5% J4jF4 8 196/296 A1 8266