Sequential Circuits Prophet-5 Service Manual - Audiofanzine

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FFFFDBKFETFFFILTFINFINEFOAFREQFSKFTFTSWCGATEGENOLDGNDCRNFaradfuse (designator)Farenheitfeedbackfield -effect transistorflip-flopfilter (VCF)finalfine(for FACTORY USE ONLY)frequencyfrequency-shift keyingfootfootswitchgategeneratorglidegroundgreenH, HEX hexadecimal (base 16)HzHertz1 inhibit1 input (solid state switch)labcICININITINTINVI/OIRQJjSTKKKBDL,LDLEDLFOLETLIMLINLOGLSBLSILVLmMMAXMEMMINMIXMODM05MSBMSIMSUMMTUNMUXamplifier bias current (3280 control)integrated circuitinputinitialinterruptinversion, inverterinput/outputinterrupt requestjack (fema)e pins)joystickkeyboardowerload*light-emitting diodeow frequency oscillatorleftlimit, limiterlinearlogarithmicfeast significant bitlarge-scale integrationlevelkilo-mili-mega-maximummemoryminimummixermodulationmetal-oxide semiconductormost significant bitmedium-scale integrationmaster summermaster tunemultiplexing, multiplexernNNCNCNEUTNONOMNORMNSENVMOOBSOFSTORGOSCOTAOUTOVPPneutralnormally open contactnominalnormanoisenon-vo atile memoryoutput (solid-state switch)obsoleteoffsetorangeoscil ator (VCO)operational transconductance amplifieroutputna nonon-invertinginputno connectionnormally closed contactoverf owpicoplug(designator)P- polyphonic (modulation)PBNDPCPCSPEDPNKPNLPOSPOTPRPRGMPRCMRPROMPRSTPSPSBPWPWMPWRQQAQTYRRARAMRECREFREGRELRESREVRGTRIPROMRSRSTSSSASARSECpitch bendprogram counter (in CPU)printed circuit boardpedalpinkpanelpositivepotentiometerpairprogramprogrammerprogrammable read-only memorypresetprogram selectpower supply boardpulse widthpufse-width modulationpowertransistor (designator)transistor array (designator)quantityresistor (designator)resistor array (designator)random-access memoryrecordreferenceregulation, regulatorreleaseresonancerevisionrightripple clockread-only memoryresetrestartswitchanalog switch signalswitch array (designator)successive approximation registersecond6-2
SELSEQSERS/HSHTSICS/NS/NSPADSPKSPKRSRCSTSTRBSUMSUSSYMSYNCSYNTHSYSTlbTCTHRSIPTRITRIGTRIMTTLTUNselectsequencerserialsample and holdsheetsignalsignaUto-noise ratioserial numberscratchpad (RAM)spare parts kitspeakersourcestartstrobesummation, summersustainsymmetrysynchronization, synchronizersynthesizersystemtransformer (designator)terminal board (designator)time constantthresho dtest point (designator)triangle-wavetriggertrimming, trimmertransistor-transistor logictuneuUmicro-u. upperUARTUNIUSARTVV{A)V(D)v-cVCAVCFvcoVDACVIOLVMUXV/OCTVOLVPEDVRVRECWintegrated circuit (designator)universal asynchronous receiver-transmitterunisonuniversal synchronous-asynchronousrecei ver-tra nsm1tterVoltsVsuppy, analog circuitV supply, digital circuitvoltage-to-current convertervoltage-controlled amplifier (AMP)vottage-controlled filter (FILT)voltage-con trolled oscillator (OSC)DAC output voltagevioletPOT MUX output voltagevolts-per-octavevolumepeda voltage (or, voltage pedal)voltage regulator (designator)voltage recordwiring or cableW- wheel (MOD)WHT whiteXORYYELexc!usrve-ORcrystalyellow,«6-3/6-4
Page 1 and 2:
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Page 3 and 4:
PROPHET-5 SYNTHESIZERTECHNICAL MANU
Page 5 and 6:
iJTable of ContentsISECTION 1MECHAN
Page 7 and 8:
'1SECTION 1MECHANICAL1-0 GENERALThi
Page 9 and 10:
Raise the top panel assembly to ser
Page 11 and 12:
1-5 PCB 1/2 CONTROL PANELSOnce PCB
Page 13 and 14:
Figure 1-5KEYBOARD REMOVAL1 -7/1 -8
Page 15 and 16:
TOADDITIONALVCOsTOADDITIONALENV GEN
Page 17 and 18:
2-2 THE PROPHETThe Prophet is a sub
Page 19 and 20:
COMMON ANALOGVOICE(VOiCES e-5 ARE S
Page 21 and 22:
'IAll processed CVs originate from
Page 23 and 24:
ajMim—2-8 AUDIO OUTPUTAs shown in
Page 25 and 26:
.'2-10 MICROPROCESSOR, MEMORY, AND
Page 27 and 28:
For troubleshooting, it should be e
Page 29 and 30:
2-12 ADC, DAC, AND CV OUTPUTSThe DA
Page 31 and 32:
iirH- - jMg 1— -^ 'iVMUX, U201-3^
Page 33 and 34:
the same CV and trigger pattern to
Page 35 and 36:
SECTION 3DOCUMENTS3-0 DOCUMENT LIST
Page 37 and 38: TOP PANEL ASSEMBLY1CHASSiSLAST \NOT
Page 39 and 40: TB/0i/20f 32 22 30 20 19 25 233 2 I
Page 41 and 42: TBZOf/^fOtP^2C20ZTBZOI/IOl17FUT ATK
Page 43 and 44: OA* Y*tMOlooMtt'O o)i:i'^.^^.1 I5-
Page 45 and 46: —' i+6V+5d^1—+I5V+ SV+ V ff^ U3
Page 47 and 48: 1+ I5V£/JJiJ-5|T> -TUNEWBOtWfOiAMP
Page 50 and 51: P40I+I6V(TUNE MUX)P40iP40f3ft wMIK
Page 52 and 53: + I5VOSCP40i^Q ^ |PMOPFR£QASFINAL
Page 54 and 55: M+I5VP40/ x|5v301 K|%34^fM0O£WASR4
Page 56 and 57: IU504ft50647C5042Z00|iFMCTBMtZCT2 1
Page 58 and 59: Inpreparation for service, set up t
Page 60 and 61: 4-2 OSCILLATOR B TESTSTEP MODULE CO
Page 62 and 63: 4-S FILTER TEST.STEP'MODULE CONTROL
Page 64 and 65: 4-8 POLY-MOD TEST—A.STEP MODULE C
Page 66 and 67: i4-11 PITCH WHEEL TRIMThis trim rem
Page 68 and 69: A)I4-16 VCO SCALE TRIMBE SURE RECOR
Page 70 and 71: 4-19 FILTER ENVELOPE AMOUNT VCA BAL
Page 72 and 73: 4-21 FINAL VGA BAL1. Switch PRESET
Page 74 and 75: 115-3 PCB 3BT301 E-040L-\:!Oi 0-U45
Page 76 and 77: I ]U374U375U376U377U37SU379U380U381
Page 78 and 79: 1R419SR4199R4200R4201R4202R4203R420
Page 80 and 81: 51» IR44S7/488 R-025R44S9 R-009R44
Page 82 and 83: kL096 E-066098 E-071100 E-078102 E-
Page 84 and 85: IJ310 M-156312 M-157314 M-158316 M-
Page 86 and 87: JJ51S R-161520 R--162522 R-163524 R
Page 90 and 91: 11 IJSECTION 8THEORY8-0 INTRODUCTIO
Page 92 and 93: 1 1for the 2 to 5-foot range. The c
Page 94 and 95: IiSECTION 9PRCX^RAMMING9-0 INTRODUC
Page 96 and 97: I3JIJThe Prophet will not accept st
Page 98 and 99: ByteByte 23Switch Bit (7)OSC A PULS
Page 100 and 101: t J IISECTION 10REVISION 3.1 and 3.
Page 102 and 103: I+ I5V+5dI^1-+5V 2'2pF+I6V+5V^^' U3
Page 104 and 105: T&=* PANEL ASSE^^mtYSAfKEYBOARD,'r-
Page 106 and 107: .^^'»_ u jj'/X H"r,P-*tQ( p5^f -^"
Page 108 and 109: 4/J«-5[E> -TUNER57a12wzofwiOi^^^^^
Page 110 and 111: —T8502J/fRSOBWMfrS/IC5045.iiU502i
Page 112 and 113: ^ 1 1 ;4 PINFigure II-OFigure11-TM1
Page 114 and 115: I 111-2 REVISION 3.0 MEMORY TESTRev
Page 116 and 117: Tr1 1-5 WHEEL BALANCE TRIM1. See pa
Page 118 and 119: SECTION 13PROPHET-5 REV 3.3 UPDATET
Page 120 and 121: iFigure 13-1PCB 3 TOP MODIFICATIONT
Page 122 and 123: T 1ttSillniiinMIttltltlltlillll^- ^
Page 124 and 125: i/*5-tft/jj4-y,6-C90H202 >7-CS0H5Q3
Page 126 and 127: '^'K'..v''
Page 128 and 129: tV t IEPROM1000.3.0V.8.0V.8.1V.8.21
Page 130 and 131: IJmemory interface1000.3.01000.3.11
Page 132 and 133: ittKRAM, non-volatile (NV)1000.3.01
Page 134: 1voltage-current convertervoice ass
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