Sunn-1200S-pwr-sm 维修电路原理图.pdf

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1、 SUNN 1200S p/n 021-3300-000 (120V)SERVICE MANUALCONTENTS:NoticesSpecificationsCircuit descriptionParts lists:PCB assemblyChassis assemblyEnd itemFootswitch assemblyFootswitch PCBSchematicsService diagramssunn is a registered trademark ofFender Musical Instruments Corp. 7975 North Hayden Road Scotts

2、dale, AZ 85258SUNN 1200S(This is the model name for warranty claims)AUGUST 1998IMPORTANT NOTICE:The information contained herein is CONFIDENTIAL and PROPRIETARY to Fender Musical Instruments Corp. It isdisclosed solely for use by qualified technicians for purposes of equipment maintenance and servic

3、e. It is not to bedisclosed to others without the expressed permission of Fender Musical Instruments Co. All specifications subject tochange without notice.For warranty repair service, only Fender specified part numbers are to be used. It is recommended they also be usedfor post-warranty maintenance

4、 and repair.Parts marked with an asterisk (*) indicate the required use of that specific part. This is necessary for RELIABILITY andSAFETY requirements. DO NOT USE A SUBSTITUTE!A coded naming convention is used in the description of certain parts. The codes and what they mean are as follows:CAPACITO

5、R CODES HARDWARE CODES CAP AE=Aluminum ElectrolyticBLX=Black OxideCAP CA=Ceramic AxialCR=Chrome PlatedCAP CD=Ceramic DiskHWH=Hex Washer HeadCAP MPF=Metalized Polyester FilmM=Machine ScrewCAP MY=MylarNI=Nickel PlatedCAP PFF=Polyester Film/FoilOHP=Oval Head PhillipsPB=Particle BoardRESISTOR CODESPHP=P

6、an Head PhillipsPHPS=Pan Head Phillips SemsRES CC=Carbon CompSMA=Sheet Metal A PointRES CF=Carbon FilmSMB=Sheet Metal B PointRES FP=Flame ProofSS=Stainless SteelRES MF=Metal FilmTF=Thread FormingRES WW=Wire WoundZI=Zinc PlatedRadioFans.CN 收音机爱 好者资料库SPECIFICATIONSProduct Release No.:PR 348 (This is n

7、ot a model number)Part Number:120V Version : 21-3300240V Aust : 21-3330230V UK : 21-3340230V : 21-3360100V : 21-3370Preamp sectionInput impedance:470k Full power sensitivity:12.75mVTone controls:Treble: +/- 15dB 3kHzBass: +/- 15dB 40HzGraphic Equalizer:+/- 12dB 31.5Hz, 63Hz, 125Hz, 250Hz, 500Hz, 1kH

8、z, 2kHz,4kHz, 8kHz, 16kHzMid notch:-20dB 700HzLow boost:+10dB 40HzHigh boost:+10dB 6kHzPower Amplifier SectionPower output:1200 Watts RMS into 2 0.2% THDSensitivity:1V RMS (0dBV)Power Requirements:100V AC, 50/60 Hz, 1800W120V AC, 60 Hz, 1800W230V AC, 50 Hz, 1800WSpeaker Complement:Designed for use w

9、ith the Sunn 410H or Sunn 215 BassLoudspeaker EnclosuresDimensions:Height:3.5(8.9 cm)Width:19.0(48.3 cm)Depth:15.0(38.1 cm)Weight:35 lbs(15.9 kg)Product specifications are subject to change without noticeCIRCUIT DESCRIPTIONThe Sunn 1200S Bass Amplifier employs many new technologies in various sectio

10、ns. This document is abrief overview.PreampThe preamp section employs two 12AX7 tubes. Channel one (V1) is fairly conventional, while channel two (V2) uses asecond tube with additional op-amp gain (U2B) to provide a 60s style overdrive sound. The op-amp is used asstraight gain and is never allowed t

11、o become non-linear.In typical operation, the drive channel and the clean channel are presented to the channel 1/2 mix control (R25) so thata blend can be established. The channel select button (S7) on the front panel (or its foot switch counterpart) selectsbetween this channel mix or channel one on

12、ly. This selection employs JFETS Q1-Q4.Signals are then presented to a second-order Sallen and Key filter set to F0 of 36.6 Hz and a Q of 2.1. This filterprovides about 6.5dB of boost at 41 Hz.The signal path is routed to U4B where low-boost (S2) , mid-notch (S4), and high-boost (S3) equalization sw

13、itches canbe used. These circuits are followed by conventional Baxendall low (R67) and high (R70) equalization. The Baxendallcircuit output is then sent to a graphic equalizer which can be selected by the footswitch or graphic EQ button (S61) onthe front panel. The far-right graphic EQ slider (R660)

14、 is a +/- 10dB trim for graphic EQ gain compensation.Next, the signal is presented to a second-order state-variable filter before being presented to the compressor circuit.Said filter is set to 420 Hz. At the compressor, low-frequency compression ratio (R88) and high-frequencycompression ratio (R98)

15、 are adjustable to suit the user. Audio is presented to the compressor EQ balance (R107).The compressor EQ balance controls the mix ratios of the compressor outputs. A compressor gain trim (R113) isprovided to compensate for the amount of amplification lost due to using the compressor. The compresso

16、r-gain trimcontrol is able to compensate for a compressed signal of up to 10dB.The FETs Q5 and Q6 select between pre- and post-compressor via the front panel switch (S8) or footswitch. Afterpassing through op-amp U10B and master-gain control R116, the signal is sent to output jack J3, effects-loop s

17、end.The signal input at J4, effects-loop return, goes to differential receiver U11B.Signals are forwarded to power amp pass through amplifier U12B and on to J5. At these same nodes, the signal ispassed on to the 1200 Watt class H power amplifier.RadioFans.CN 收音机爱 好者资料库Power AmplifierThe power amplif

18、ier employs class AB topology in the pre-driver circuit Q8-Q11. Quiescent current is established withtransistors Q12-Q13. Driver transistors Q16-Q17 provide drive for Q23-Q26, and Q31-Q34. Transistors Q19,Q21, andQ27-Q30 provide positive “on demand” supply-rail boost. Transistors Q20, Q22, and Q35-Q

19、38 provide the samefunction for the negative rail.Transistor Q18 provides “charge depletion” of Q23-Q26 and Q31-Q34. This allows for the suppression of commonmode current that can occur at high frequencies.Relay K1 and associated components reduce output-stage current gain to unity during power-up a

20、nd over-temperatureevents as monitored by thermistor RT1 on the main heatsink.Power supplyPrimary circuit inrush limiting is accomplished by TH1, a negative temperature coefficient thermistor.The power supply employs a toroidal power transformer with only one tapped-main secondary. Two large bridger

21、ectifiers are used to obtain +/-47VDC and +/- 94VDC.High voltage (356VDC) for vacuum tube sections is generated by half-wave multiplier comprised of CR92-CR95,C125-C128.Low voltage (+/-22VDC) and (+10 +28VDC variable fan) is supplied by the synchronous rectifier system located onthe power supply bre

22、ak-away board. This synchronous system observes the input sine and allows Q81, Q85, and Q88to be forced on until the input sine wave reaches the correct level as observed by Q83, Q87, and Q90. ReferencesQ84 (variably controlled by RT2) CR811 and CR818 are employed. Regulators U21 and U22 reduce the

23、+/-22V linesto +/-16VDCHeater voltage (24VDC for 2 series-connected 12AX7s in the preamp) is derived from the 32VDC supply (+/-16VDC). Excess voltage is dropped across across paralleled ballast resistors, R354-R356, on the preamp PCB.PARTS LISTNOTE: SHADED ITEMS ARE FOR REFERENCE ONLYPRINTED CIRCUIT

24、 BOARD ASSEMBLYQTY PART # DESCRIPTION REFERENCE DESIGNATION 20052047000BRIDGE RECT 35A 800VBR1 BR290048451000BUTTON PUSH OFF WHITE20053930000CABLE RIBBON 3 CKT 3 inP1A P5A10048914000CABLE RIBBON 8 CKT 7 inP4A10054388000CABLE RIBBON 8 CKT 9 inP8A20033606003CAP AE RDL .47UF 50V 20%C116 C64030028494000

25、CAP AE RDL 1000uF 35V 20%C802 C805 C80920028476003CAP AE RDL 100UF 50V 20%C806 C81060028463003CAP AE RDL 10UF 50V 20%C39 C43 C46 C50 C55 C5910028458003CAP AE RDL 1UF 50V 20%C53100028459003CAP AE RDL 2.2UF 50V 20%C24 C34-35 C52 C57 C81-83 C85 C8820054204000CAP AE RDL 22UF 450V 20%C130-131370028467003

26、CAP AE RDL 22UF 50V 20%C1-2 C7 C19 C23 C40 C48 C51 C56C61 C64-66 C69 C72-74 C76 C105C134 C137 C601 C603-613 C634 C636C638-63940028460003CAP AE RDL 4.7UF 50V 20%C12-13 C28 C16120053955003CAP AE RDL 47UF 160V 20%C92-9340054206000CAP AE RDL 47UF 350V 20%C125-12810054205000CAP AE RDL 47UF 450V 20%C12960

27、047195003CAP AE RDL 47UF 63V 20%C4 C86 C98-99 C803 C80720037182000CAP AE RDL 6800UF 63V 20%C121-12220053915000CAP AE100V10000uF 20%C123-12410039261001CAP CA 330PF 100VC80340034788003CAP CD .1UF 50V 20% .15CUTC644-649 C94-95 C132-133 C135-136C139-16030051457003CAP CD 100pF 500V 5%C100-101 C6372005196

28、0003CAP CD 180 PF 500V 10%C14 C2090051406003CAP CD 220PF 500V 10%C25 C45 C62-63 C67-68 C70-71 C64140051445003CAP CD 22PF 500V 5%C18 C49 C54 C5830051409003CAP CD 68pF 500V 5%C16 C60 C8920027255003CAP MPF .001UF 100VC5 C1130027257003CAP MPF .0022UF 100VC44 C47 C8710027260003CAP MPF .0039UF 100VC795002

29、7261003CAP MPF .0047UF 100VC38 C84 C96-97 C16220027262003CAP MPF .0068UF 100VC41-4220027264003CAP MPF .01UF 100VC602 C635PRINTED CIRCUIT BOARD ASSEMBLY (CONT)QTY PART # DESCRIPTION REFERENCE DESIGNATION 10047165000CAP MPF .01UF 250VC13890027267003CAP MPF .022UF 100VC31-33 C622-62790027272003CAP MPF

30、.047UF 63VC26-27 C75 C107-108 C114-115 C642-64310027275003CAP MPF .068UF 100VC3010027277003CAP MPF .082UF 100VC1760027280003CAP MPF .15UF 63VC616-C621140027278003CAP MPF .1UF 63V 10%C3 C6 C10 C29 C36-37 C106 C109-111C113 C801 C804 C80810027281003CAP MPF .22UF 63VC11240027283003CAP MPF .33UF 63VC77-7

31、8 C614-61510027286003CAP MPF .47UF 63VC11730024853000CAP MPF RDL .1UF 250V 10%C118-12050024854000CAP MPF RDL .1UF 400V 10%C8 C9 C15 C21 C10410024823000CAP MPF RDL.01uf 400v 10%C2260030937003CAP PFF RDL .0027UF 50V 5%C628-633110050514000CONTROL SLIDER 30MM 50KWR607-616 R66030027945000CONTROL SNAPIN 1

32、00K B TAPERR113 R88 R9810053926000CONTROL SNAPIN 10K 5A 10K 5CR10710053929000CONTROL SNAPIN 10K B 250K BR2520039053000CONTROL SNAPIN 1M 30AR20 R4710053928000CONTROL SNAPIN 250K 30A TAPERR3720031087000CONTROL SNAPIN 25K 2B W/DETENTR67 R7010027941000CONTROL SNAPIN 50K B TAPERR116150064089001DIODE 1N40

33、03 LLCR44-45 CR103-104 CR801-802CR805-808 CR812-815 CR81940026730001DIODE 1n4006 800v LLCR92-95720006260001DIODE 1N4448 SIGNAL LLCR3-27 CR38-39 CR50-53 CR60 CR62-85 CR87-88 CR96-100 CR601-603CR803-804 CR809-810 CR816-81740054209001DIODE 1N5817 1ACR36-37 CR42-4320029045000DIODE 6A 400V 6A4 LEAD FORME

34、DCR58-59120025821001DIODE HV FDH-400 SWITCHING LLCR28-35 CR46-47 CR54-5520052050000DIODE MUR1520 200PRV 15AMPCR56-5710041261000DIODE VOLT REF LM4040DIZ-10.0U1520009165001DIODE ZEN 1n4744a 15v 1w 5%CR90-9110027329001DIODE ZEN 1n5228b 3.9v 5% LLCR8640027327001DIODE ZEN 1n5234b 6.2v 5% LLCR40-41 CR101-

35、10210029898001DIODE ZEN 1N5236B 7.5V 5%CR8950031635001DIODE ZEN 1n5240b 10v 5% LLCR1-2 CR48-49 CR6120038686001DIODE ZEN IN4737A 7.5V.5W 5%CR811 CR818110025802000FSTN TAB MALE .250 x .032 PCB MTCP1-1120025996000FUSE CLIP PCB .250 5MM FUSEXF110053654000GASKET HEATSINK 1200SPRINTED CIRCUIT BOARD ASSEMB

36、LY (CONT)QTY PART # DESCRIPTION REFERENCE DESIGNATION 10027408000HDR .1 CTR 2 CKT SQ PINP920027410000HDR .1 CTR 3 CKT SQ PINP1 P520027416000HDR .1 CTR 8 CKT SQ PINP4 P810053864000HEATSINK DRVR 1200S FRNT10053865000HEATSINK DRVR 1200S REAR10053488000HEATSINK MAIN SUNN 1200S10053866000HEATSINK RECTIFI

37、ER 1200S20025796000HEATSINK TO-220170051198000IC DUAL OP AMP BA4560N SIPU5-7 U11-13 U16-17 U19-20 U61-6770016795000IC DUAL OP AMP TL072U1-4 U9-10 U1410051680000IC DYNAMIC RANGE PROCESSOR DUALVCA SSM2120U810013562000IC REGULATOR 15V MC7815CTU2110013564000IC REGULATOR 15V MC7915CTU2210051856000IC QUAD

38、 2-IN NAND GATE 4011U1810027387000INDUCTOR AIR CORE RDL 2.5UHL140017974000INSULATOR MICA TO-220200038815000INSULATOR SILICONE TO-3P10051006000JACK 1/4 PCB DUAL TIP MONOJ120051658000JACK MONO R/AJ2 J1240029175000JACK PHONE 1/4 HI CURRENT PCJ8-1140053450000JACK STEREO RAJ3-610049892000JACK XLR MALEJ74

39、0028039000LED RED 5x5MM SLB-55VR3LD3-5 LD6120053951000LED RED, T-1.75 ClrLD1-210033177000LED RED/GREEN 5x5mm BI-COLORLD610053616000PCB MAIN SUNN 1200S10036613000RELAY DPDT DIP 24 VOLT 8.3mAK120026505001RES CF 1/2W 5% 1 OHM LLR813 R81930026368001RES CF 1/2W 5% 100 OHMR3-540025116001RES CF 1/2W 5% 100

40、KR18 R23 R36 R4440026493001RES CF 1/2W 5% 2.7K LLR238 R244 R268 R67530026512001RES CF 1/2W 5% 3.9K LLR802 R809 R81520025941001RES CF 1/2w 5% 560 ohm LLR6 R29240024967001RES CF 1/4W 5% 1.2KR13 R22 R31 R63720028862001RES CF 1/4W 5% 1.3KR159-16070024969001RES CF 1/4W 5% 1.5KR43 R58 R155-156 R179-180 R2

41、2920025073001RES CF 1/4W 5% 1.5MR86 R9620024937001RES CF 1/4W 5% 10 OHMR230 R301PRINTED CIRCUIT BOARD ASSEMBLY (CONT)QTY PART # DESCRIPTION REFERENCE DESIGNATION 20024952001RES CF 1/4W 5% 100 OHMR119 R130180024997001RES CF 1/4W 5% 100KR12 R16 R33-34 R56 R122 R133 R135-136 R140 R196-197 R228 R277-279

42、R282 R668610024981001RES CF 1/4W 5% 10KR8 R10 R14 R24 R26 R28-29 R32 R38R48 R50-51 R54 R60 R69 R72-74 R77R79 R82-83 R89 R99 R106 R110 R115R117-118 R120-121 R124-129 R131-132 R137 R141 R157-158 R236 R241R253 R265 R276 R285 R290 R601-606R657-658 R664-665 R67110024998001RES CF 1/4W 5% 120KR213002498300

43、1RES CF 1/4W 5% 12KR143 R188-18920029539001RES CF 1/4W 5% 13KR61-6250024999001RES CF 1/4W 5% 150KR41 R95 R251 R256 R27140024985001RES CF 1/4W 5% 15KR642 R647 R651 R65620024986001RES CF 1/4W 5% 18KR633 R638110024965001RES CF 1/4W 5% 1KR17 R93 R103 R151 R153 R646 R655R803-804 R811 R817180025069001RES

44、CF 1/4W 5% 1MR9 R15 R27 R30 R39 R59 R64 R94R104 R139 R240 R246 R270 R274R302-303 R670 R67360024971001RES CF 1/4W 5% 2.2KR235 R248 R257 R652 R810 R81610025075001RES CF 1/4W 5% 2.2MR28950029455001RES CF 1/4W 5% 2.4KR87 R97 R198-199 R63410024942001RES CF 1/4w 5% 22 ohm LLR80660024956001RES CF 1/4W 5% 2

45、20 OHMR90-91 R100-101 R123 R13410025059001RES CF 1/4W 5% 220KR19180024987001RES CF 1/4W 5% 22KR46 R52 R227 R242-243 R252 R261R263-264 R266-267 R272 R286 R288R661-662 R672 R67420024988001RES CF 1/4W 5% 27KR144-14510029005001RES CF 1/4W 5% 2KR64370024973001RES CF 1/4W 5% 3.3KR40 R617-618 R620 R622-623

46、 R62520026504001RES CF 1/4W 5% 3.6KR65-6640024975001RES CF 1/4W 5% 3.9KR192-193 R628 R64040028865001RES CF 1/4W 5% 30KR639 R644 R648 R65330025061001RES CF 1/4W 5% 330KR49 R262 R27530024989001RES CF 1/4W 5% 33KR627 R630 R63510024960001RES CF 1/4w 5% 390 ohmR80710025063001RES CF 1/4W 5% 390KR537002499

47、1001RES CF 1/4W 5% 39KR68 R80 R84 R105 R109 R186-18740029610001RES CF 1/4W 5% 3KR619 R621 R624 R62610029472001RES CF 1/4W 5% 4.3KR64950024977001RES CF 1/4W 5% 4.7KR55 R57 R142 R176 R63110025079001RES CF 1/4w 5% 4.7m LLR28410029592001RES CF 1/4w 5% 43 ohm LLR18420029451001RES CF 1/4w 5% 430 ohm LLR17

48、4-175PRINTED CIRCUIT BOARD ASSEMBLY (CONT)QTY PART # DESCRIPTION REFERENCE DESIGNATION 50024947001RES CF 1/4W 5% 47 OHMR81 R85 R146 R194-19590024961001RES CF 1/4W 5% 470 OHMR1-R2 R204-207 R280 R287 R29350025065001RES CF 1/4W 5% 470KR7 R45 R233 R247 R669140024993001RES CF 1/4W 5% 47KR42 R71 R108 R111

49、-112 R114 R147-150 R152 R154 R163 R28110028034001RES CF 1/4W 5% 5.1KR29150024978001RES CF 1/4W 5% 5.6KR11 R35 R76 R659 R66320025066001RES CF 1/4w 5% 560k LLR258-25940024994001RES CF 1/4W 5% 56KR75 R78 R641 R65010028948001RES CF 1/4W 5% 6.2KR6330024979001RES CF 1/4W 5% 6.8KR237 R666-66710029596001RES

50、 CF 1/4W 5% 62 OHMR18570024995001RES CF 1/4W 5% 68KR92 R102 R138 R181 R234 R629 R63220025942001RES CF 1/4W 5% 7.5KR645 R65410028153001RES CF 1/4W 5% 75KR28320029581001RES CF 1/4W 5% 8.2 OHMR170-17110024980001RES CF 1/4W 5% 8.2KR63620024964001RES CF 1/4w 5% 820 ohm LLR172-17340025068001RES CF 1/4W 5%