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.
@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.
Rev.
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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 ......
........................................................................................................... "....... 5 Electrical Checkout and Adjustment Procedures ,,,.......................................5-1 5 1 General Informatiow ........................................................................... 5-1 5 2 Standard Initiat Conditions ................................................................ 5-1 53 DC Offset ..................................................................................
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 ...................
@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.
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.
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.
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.
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.
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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.
@-.,"-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.
ence.
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.
E Sfudio Reference Service Manual Rev 0 -,..- ,,.
@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.
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.
@crmwmx "-.". S t ~ ~ dReference ia Servjce Manuaf -...- -.
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.
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.
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.
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.
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.
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6 Schema Schematics 6-1
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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.
crownv - Studs Refercs?r_;le Service Manual,,..,",."--- ,".-"-- - --.Y...
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.
@crawm* -..- . Studio Referer7ce Service Manual - 1 . *.11 m . - .
Parts information 7-5
@crown* . p " s . - " - p - Parts lnfsrmatiorl 7-6 Studio Refergnee Service Manual --,.
Studio Reference Service Manuaf Screw, 8-18x 1.375PNWD 8$1018%10822 Main Madufe Spacefx3 7 5 Toggle Nut Plastic Board Support, 7$8Lock Screw, 6-32 x -3f 2 Par? Hd. T15 Clamp, TO-22On8-3P Output Assambly crew, 6-32 x .56 Washer Head T ? 5 1 x .
@Crownx -...- Studio Reference Service Manua$ ,,, ,, , , , , , , , , -,-." .,.
Back Pane Bask Panel Plate Shield, Circuit Breaker Screw, 8-32x 38 PNHD Screw, 6-32x .25 WasherEW6 lnt, Shar REF I Circuit Breaker$30A REF I! Circuit Breaker) 288 Strain Relief Pip Cage Assom bty Dual Binding Past, Gald PItd Jumper, 2 Position Wire, # I 2 BLK 22 in, Wire, #I2 BkK 15 in, Wire?#12 RED 20 in. Wire, R 12 RED 13 in.
SCYGW, 8-42x "332T I 5 NPN Power Transistor$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 .
Parts informahian 7-14
mcrawm, ".".".-."".- pp,,.-.~.. Studio Man~~sf ---- Reference Service ---- ~-"-".~..."...,~ ....,". This page intantionalty left blank Parts Infarmatian 7-f 6 --- Rev.
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.
. .. 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.
$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
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 $4 TP 1 TP2 Ul01/201 C 641 1-0 tJ f 02/202
This page intentionally left bDank Maduie Information 8-6
Rev" 0 8 Modu ormation
12 Pin Header J3 "'UP47NPN 14 2SC4029 NPN E5 C05 C 6806-1 COG CJ0 C 6886-f C 6887-9 C 6810-3 @ G889-5 C 6807-9 GI2 C 6886-7 --- Nat Used --- C67 COB C09 el 1 C13 .Q1&aF186V .OfgF10OY .001vF106V 180pF 166V 220pF l 0OV .881pf 1QQV .OlpFlOOV 2SA1559 PNP J5 2SC4029 NPN G5 2SA1553 PNP H 5 2SC4793 NPN F4 TIP47 NPN F4 2SA4837 PNP 14 34 G4 F3 E3 J3 14 14 --- No$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.
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.
@crawmz Studio Reference Service M3nua$ R ~ 0K pm m. o , , , , , , , , -"."_ .-p 8.
@CTaWm8 -. .".
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.
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 .
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% .
- 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 .
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
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.
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.
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% 2
Module lnformati~n 8-38
