Sequential Circuits Prophet-5 Service Manual - Audiofanzine

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1-4 PCB 3 COMPUTER BOARDPCB 3 is held by the screws identified in Figure 1-2, and by two direct connectors to PCB 2, behind it. Toremove PCB 3 first remove PCB 4.remove screws, and pull while rocking the board to minimize stress.Disconnect back panel cable from P302 and wheel cable from P301^P301/WHEELCABLE 5PANELCABLEFigure 1-2PCB 3 MOUNTINGWhen replacing be sure allAlignment isconnector pins are correctly mated with PCB 2 before fastening screws.insured by machine screw holes with their standoffs. Remember to reconnect the wheelcable, too, before replacing PCB 4.interlock.When reconnecting wheel and back-panel cables, be sure tabs1-4
1-5 PCB 1/2 CONTROL PANELSOnce PCB 3 and PCB 4 have been removed, control pane! removal involves pulling off all knobs,unscrewing all potentiometer mounting nuts—using a half-inch nutdriver—and removing screwsidentified in Figure 1-3.J201/W1KEYBOARDCABLEPCB 2LEFTCONTROLPANELW201PCB 1/2INTERCONNECTFCB1RIGHTCONTROLPANELFigure 1-3PCB 1/2 MOUNTINGWhen replacing, check keyboard cable, that ail pots fit correctly through the front panel, and thatswitches operate freely before tightening pot nuts.v;^f'1-5
Page 1 and 2: ^^. ^ ^s .y ^,-j?^ ^^w^-^>&i^^^V^?v
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: Raise the top panel assembly to ser
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
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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 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 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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