Sequential Circuits Prophet-5 Service Manual - Audiofanzine

4-17 POLY-MOD FILTER ENVELOPE VCA BALANCE1. Switch PRESET off and set controls according; to Figure 4-8.2. To trim Voice 1, first turn P-MOD FILT ENV to 103. Probe U422-13 by clipping to right end of R4108.4. With no keys hit, trim R494 for .OOOV.5. Trim Voices 2 - 5 in the same way, referring to Table 4-1.Table 4-1POLY-MOD FILTER ENVELOPE VCA BALANCEVOICEOTAPROBE(RIGHT END)TRIMMER1U422-13R4108R4942U423-13R4109R4963U424-13R4118R4984U425-13R4119R41005U426-13R4128R41024-18 POLY-MOD OSCILLATOR B VCA BALANCE1. Switch PRESET off and set controls according to Figure 4-8.2. Turn P-MOD DSC B to 10.3. Probe U428-13 by clipping to right end of R4108.4. With no keys hit, trim R4138 for .OOOV.5. Trim Voices 2 - 5 in the same way^ referring to Table 4-2.Table 4-2POLY MOD OSC B VCA BALANCEVOICEOTAPROBE(RIGHT END)TRIMMER1U 428- 13R4108R4138234U428-12U429-13U429-12R4109R4118R4119R4139R4140R41415U430-13R4128R4142D.2 4-13