Sequential Circuits Prophet-5 Service Manual - Audiofanzine

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4-21 FINAL VGA BAL1. Switch PRESET off and set controls according to Figure 4-8.2. Turn MIX OSC A to 0.3. Switch FILTKBD off.4. Switch UNISON on.5. Tie any key on by clipping J-wire to bus bar.6. Referring to Table 4-5, turn down Voice 2 - 5 volumes with trimmers listed.7. Check that R4529 is set for maximum Voice 1 volume.8. Probe U480-5 at left end of R4565-569.9. Trim R4520 for .000-V reading.10. Turn Voice 1 volume all the way down.11. Turn Voice 2 Volume up fully, and trim in the same way.12. Repeat for Voices 3 - 5.13. Untie key.Table 4-5FINAL VGA BALVOIGE VOLUME FINAL VGA BAL1 R4529 R45202 R4528 R45213 R4527 R45224 R4526 R45235 R4525 R45244-22 VOIGE VOLUME1. Switch PRESET off and set controls according to Figure 4-1 or faaory program 1-8.2. Adjust OSC A FREQ to 5.3. With scope, probe U480-7 at right end of R4564.4. Check that all Voice Volume trimmers are set for maximum volume {see Table 4-5).5. Play polyphonically and measure each voice level on scope. (To identify the voices, touch the OSCAs.).6. Turn down louder voices to volume of the softest voice.b.4-16
11rJSECTION 5PARTS5-0 CHASSIS 5-2 PCB 2NOTE. FOR ITEM DESCRIPTIONSSEE PARAGRAPH 5-6,BILL OF MATERIALSC201-04C205D201-23C-045C-031D-005DESIGNATORITEMNOFlE-05DS201-22DS224SEE S201-22L-005J 1/2J3J4-10JllJ12J13J14J-001J-014J-001J-029/P 028J-043/P 022.1-007 (SEE SAD(.I-044/P-022J201P201P202Q201J-007P-025, P-032P-040T-002QA20T-011PIE-037Rl/2SIS2S3TlAlR-207S-025S-032S-03S-027E-04SR201/02R203R204/05R20d.R207/08R209R210/11R212R213-17R213-20R-221R-008R-221R-008R-221R-008R-221R-OlOR-221R-OlOW2E-080E-078RA201RA202R-300R-3015-1 PCB 1S201-20 S-02SS-029S-030S-031ClOlC-04DlOl-14D-005DSlOl-14SEE SRlOl-13 R-221U201-03U204/05U206U207/08U209/10U211U212III211227I _o 271-2161-228I-21SSlOlS102-12S113S114S-028S-029S-028S-029W201*iE-0715-1
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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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Figure 1-5KEYBOARD REMOVAL1 -7/1 -8
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Page 35 and 36: SECTION 3DOCUMENTS3-0 DOCUMENT LIST
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Page 62 and 63: 4-S FILTER TEST.STEP'MODULE CONTROL
Page 64 and 65: 4-8 POLY-MOD TEST—A.STEP MODULE C
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Page 118 and 119: SECTION 13PROPHET-5 REV 3.3 UPDATET
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