Sequential Circuits Prophet-5 Service Manual - Audiofanzine

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ByteByte 23Switch Bit (7)OSC A PULSEOSC A SAWOSC A SYNCOSC B SAWOSC B TRIOSC B PULSEOSC B KBDUNISONPOLY-MOD FREQ APOLY-MOD PW APOLY-MOD FILTLFO SAWLFO TRILFO SQUAREFILT KBDRELEASEW-MOD FREQ AW-MOD FREQ BW-MOD PW AW-MOD PW BW-MOD FILTOSC B LO FREQXXPot Bits (Q-6)FILT ATKFILT DECFILT SUSFILT RELAMP ATKAMP DECAMP SUSAMP RELFILTER CUTOFFFILT ENV AMTMIX OSC BOSC B PWMIX OSC AOSC A PWMIX NOISEFILT RESONANCEGLIDELFO FREQW-MOD SOURCE MIXP-MOD OSC BP-MOD FILT ENVOSC A FREQOSC B FREQOSC B FINEFor use with this interface, the Prophet maintains a pointer to NV RAM addresseswhich allows implied addressing. The pointer initially indicates the first NV RAMaddress. Whenever the Prophet receives a code 08(H), it outputs the NV RAM bytecurrently being pointed to, then increments the pointer. Therefore to read all of the NVRAM, the sequencer will have to supply exactly 102
I9-10 STATUS 6: INITIALIZE SEQ LOWER PROGRAMThis status byte ^O(H) was inherited from the Prophet-iO but should not be sent to theProphet-5.9-li STATUS 9: DISABLE TUNECode 09(H) isused to disable the Prophet*s TUNE switch. An ideal application would befor the sequencer to disable TUNE before executing a LOAD FROM TAPE operation(STATUS ^).9-12 STATUS A: ENABLE TUNECode OA(H) reverses STATUS 9, to allow the Prophet to be tuned. This code doesn'tstart the TUNE routine, it just enables you to hit the switch.9-13 STATUS B: RECEIVE PROGRAM CHANGECode OB(H) prepares the Prophet to change programs, without the Prophet sending anACK as with STATUS 1. The program byte has the format described under STATUS 0,and should follow STATUS B after 2 milliseconds. If it arrives before 2 ms, an overrunerror may occur. If it doesn't arrive within ^ ms, the Prophet will then expect to bereceiving status bytes again.9-U STATUS C: SYSTEM CONNECTThis status byte is best used for initial testing of your system hardware. The Prophetresponds to code OC(H) by sending an AA(H). The sequencer thus learns that the Prophetis connected and listening.9-15 STATUS E: RECEIVE SHORT KEYBOARD DATAThis status byte is similar to STATUS 1, except that the keyboard data is limited toseven bytes (56 notes), and there is no program byte. There is also no ACK. In short, thesequencer ideally sends code OE(H), waits 2 ms, then sends seven bytes at iOO-usintervals. There is a ^-ms timeout.9-6TM1000D.2 10/81
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PROPHET-5 SYNTHESIZERTECHNICAL MANU
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iJTable of ContentsISECTION 1MECHAN
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'1SECTION 1MECHANICAL1-0 GENERALThi
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Raise the top panel assembly to ser
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1-5 PCB 1/2 CONTROL PANELSOnce PCB
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Figure 1-5KEYBOARD REMOVAL1 -7/1 -8
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TOADDITIONALVCOsTOADDITIONALENV GEN
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2-2 THE PROPHETThe Prophet is a sub
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COMMON ANALOGVOICE(VOiCES e-5 ARE S
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'IAll processed CVs originate from
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ajMim—2-8 AUDIO OUTPUTAs shown in
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.'2-10 MICROPROCESSOR, MEMORY, AND
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For troubleshooting, it should be e
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2-12 ADC, DAC, AND CV OUTPUTSThe DA
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iirH- - jMg 1— -^ 'iVMUX, U201-3^
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the same CV and trigger pattern to
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SECTION 3DOCUMENTS3-0 DOCUMENT LIST
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TOP PANEL ASSEMBLY1CHASSiSLAST \NOT
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TB/0i/20f 32 22 30 20 19 25 233 2 I
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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 88 and 89: FFFFDBKFETFFFILTFINFINEFOAFREQFSKFT
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 100 and 101: t J IISECTION 10REVISION 3.1 and 3.
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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
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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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Sequential Circuits Prophet-5 Service Manual - Audiofanzine

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