KIT M AN UAL
INTR OD U C T I ON BUILDING YOUR KIT --------------------------------------------------------WELCOME TO THE KIT MANUAL FOR ASSEMBLING THE 7-75 DIY KIT. THIS MANUAL CONTAINS THE BASIC INFORMATION NEEDED TO ASSEMBLE THE KIT, BEFORE STARTING IT S A GOOD IDEA TO GATHER AS MUCH INFORMATION ON THE BUILD AS POSSIBLE. SEARCH FORUM THREADS FOR THINGS THAT BUILDERS BEFORE YOU MIGHT HAVE ENCOUNTERED AND SOLVED. THERE S NO REASON FOR YOU TO SOLVE WHAT SOMEONE ELSE ALREADY HAVE FIGURED OUT! IT S ALSO A GOOD IDEA TO READ THROUGH THE OLD SERGE INSTRUCTIONS, FOUND HERE http://www.serge.synth.net/documents/kit/kbm.html BEFORE STARTING. A FEW POINTERS BEFORE STARTING:, MODULES ARE NOT CONNECETD. SO THEY CAN BE TESTED INDIVIDUALLY, BUT IT ALSO MEANS YOU HAVE TO RUN POWER WIRES TO EACH AND EVERYONE, POWER IS APPLIED TO PADS W, X, Y, Z. AND WIRES HAVE THE FOLLOWING
STANDARD: W, GND (BLACK) X, +V (RED) Y, +6V (GREEN) Z, -V (WHITE), RESISTORS WITHOUT SUFFIX IS OHMS, SO 5 IS 5 OHMS. IF IT S A PREFIX IT S 0.x, SO u IS 00n. 4, MAKE SURE EVERYTHING WORKS BEFORE PUTING ON THE PANEL! NO REALLY, MAKE SURE IT S 00% OPERATIONAL BEFORE FINAL ASSEMBLY. EVERYTHING CAN BE TESTED WITHOUT MOUNTING THE JACKS. USE CROCODILE CLIPS AND RESISTOR LEGS AS PATCH CORDS IF NEEDED. 5, BE CREATIVE! THE COLORS FOR KNOBS AND JACKS ARE JUST SUGGESTIONS. IF YOU FEEL LIKE DOING A YELLOW/PURPLE/ORANGE COMBINATION INSTEAD, PLEASE DO. DON T LIKE THE KNOBS? CHANGE THEM! NOTHING IS SET IN STONE, IT S UP TO YOU TO SHAPE THIS TO THE INSTRUMENT YOU WANT TO PLAY. A GOOD LOOKING INSTRUMENT PLAYS BETTER THAN AN UGLY ONE. 6, TAKE YOUR TIME, HAVE FUN! NO REASON TO STRESS AND MAKE ERRORS JUST BECAUSE YOU WANT TO PLAY. THE JOURNEY IS MORE IMPORTANT THAN THE DESTINATION. Jon, 7-75.com
OS C I LLATOR BOM 4k7 --------------- 6 k Qty Value k p 8k 47p 00k 8p 5 0k 0n M 7n M5 4u7 M 47u 4M7 5k TRIMMER 4 5k LINEAR POTENTIOMETER N448 N904 LM900 5 4 0 0k 5k k k k
TRIM INSTRUCTIONS ----------------------------THERE S THREE TRIMMERS FOR THE OSCILLATOR. TRIMMER, INITIAL OFFSET. SET FOR DESIRED LOWEST FREQUENCY. SUGGESTED 5-0Hz. TRIMMER, RANGE. ADJUST FOR SPAN OF 5-0Hz TO 0-4kHz. TRIMMER, SINE ADJUSTMENT IN SAW TO SINE WAVESHAPER. ADJUST FOR CLEANEST POSSIBLE SINEWAVE OUTPUT. BACKSIDE OF CIRCUIT BOARD
OSCILLATOR SCHEMATIC ---------------------------------------------------------
TRI PLE BOM --------------Qty Value 00p 470n 47u N448 LM900N 0 6 k 0k 50k 9 M5 5k TRIMMER 5k POTENTIOMETER WAV E SH AP E R
TRIM INSTRUCTIONS ------------------------THERE S ONE TRIMMER FOR EACH SECTION OF THE TRIPLE WAVE SHAPER. ADJUST THE TRIMMER (WITH THE INPUT PUT TURNED FULLY CLOCKWISE) SO THE OUTPUT AMPLITUED IS THE SAME AS THE INPUT AMPLITUDE. BACKSIDE OF CIRCUIT BOARD
TRIPLE WAVE SHAPER SCHEMATIC ---------------------------------------------------------
PEA K BOM --------------Qty Value 0 N448 N904 N906 5 k 5k 50k 0k AND T ROU GH
PEAK AND TROUGH SCHEMATIC ---------------------------------------------------------
TRI P LE COM PARATO R BOM --------------Qty Value 00p 470n 47u N448 LM900N 0 6 k 0k 50k 9 M5 5k TRIMMER 5k LINEAR POTENTIOMETER
TRIM INSTRUCTIONS ------------------------ONE TRIMMER FOR ALL THREE COMPARATORS. INPUT A SAWTOOTH 0-5V, ADJUST FOR 50% PULSWIDTH WITH POT AT NOON. BACKSIDE OF CIRCUIT BOARD
TRIPLE COMPARATOR SCHEMATICS ---------------------------------------------------------
D UAL PROC ESSOR BOM --------------Qty Value 4 0n 4 N448 4 LM74 0 80 0k 00k 0k 8 5k LINEAR POTENTIOMETER
DUAL PROCESSOR SCHEMATICS ---------------------------------------------------------
GAT E BOM 5k TRIMMER --------------- 5k LINEAR POTENTIOMETER Qty Value 0p 0n 470n N448 LM07 CA080 N906 0 k k 5k 4 k k 68k 4 0k (TL07)
TRIM INSTRUCTIONS ------------------------INPUT A AUDIO SOURCE INTO AC-INPUT. SET TO CENTER. MONITOR OUTPUT AND ADJUST AND FOR SAME OUTPUT AMPLI- TUDE AS INPUT. INPUT DC SOURCE INTO DC IN. ADJUST FOR MINUM OUTPUT OFFSET. BACKSIDE OF CIRCUIT BOARD
GATE SCHEMATICS ---------------------------------------------------------
RING MOD U LATOR BOM 5k TRIMMER --------------- 5k LINEAR POTENTIOMETER Qty Value 0n 0p 470n N448 LM07 CA080 N906 0 k k 5k k 4 47k 50k 4 0k 68k (TL07)
TRIM INSTRUCTIONS ------------------------START BY SETTING TO CENTER POSITION, SET TO FULL CCW. INPUT A 500Hz SAWTOOTH, INTO X AND PAD A. ADJUST FOR A SYMMETRICAL OUTPUT. A DISCONNECT SAWTOOTH FROM X. ADJUST FOR MINUM FEED THROUGH. REPEAT ADJUSTING NOW THAT IS SET. CONNECT khz SAWTOOTH TO BOTH X AND Y. ADJUST FOR A SYMMETRICAL OUTPUT. BACKSIDE OF CIRCUIT BOARD
RING MODULATOR SCHEMATICS ---------------------------------------------------------
PRE AMP & REV ERB BOM 0k --------------- k Qty Value 470k 00p 6k8 0n 0p 5k LINEAR POTENTIOMETER 0n n RCA CONNECTOR 47p 6 u N904 LM458 LM900 N906 0 4 0 4 00k 0k 50k M
REVERB SCHEMATICS ---------------------------------------------------------
PREAMP SCHEMATICS ---------------------------------------------------------
POS ITI V E BOM --------------Qty Value 00p 470n 47u N448 LM900N 0 6 k 0k 50k 9 M5 5k TRIMMER 5k POTENTIOMETER SLEW
TRIM INSTRUCTIONS ------------------------PATCH BOTTOM PULSE OUTPUT TO INPUT FOR CYCLE ACTION. ADJUST TRIMMER TO TASTE. ORIGNAL TRIMMING IS MAX FREQUECNY OF KHz FOR TOP SLEW AND 500Hz FOR BOTTOM SLOW. IT MIGHT BE PREFERABLE TO SET THEM TO THE SAME FREQUENCY THOUGH... BACKSIDE OF CIRCUIT BOARD
POSITIVE SLEW SCHEMATICS ---------------------------------------------------------
NE GAT I V E SLEW BOM M --------------- 5k TRIMMER Qty Value 4 5k LINEAR POTENTIOMETER 0n 0p 0n CA086 LM900 4 0 4 4k7 4 6k8 6 0k 4 8k 4 k 00k 6 0k 0k 8 470k 80k
TRIM INSTRUCTIONS ------------------------PATCH PULSE OUTPUT TO INPUT FOR CYCLE ACTION. ADJUST TRIMMER TO TASTE. ORIGNAL TRIMMING IS MAX FREQUECNY OF KHz FOR TOP SLEW AND 500Hz FOR BOTTOM SLOW. IT MIGHT BE PREFERABLE TO SET THEM TO THE SAME FREQUENCY THOUGH... BACKSIDE OF CIRCUIT BOARD
NEGATIVE SLEW SCHEMATICS ---------------------------------------------------------
EN V ELOP E BOM 68k --------------- 8k Qty Value k 00p k 0n 5 00k 0p 0k p 7 470k 470n M M5 6 N448 6 N904 0k TRIMMER LM900 5k TRIMMER N906 4 5k 5 470 0M k k 6k8 5k 7 k LINEAR POTENTIOMER
TRIM INSTRUCTIONS ------------------------PATCH END TO START, SET RISE AND FALL CCW. ADJUST UNITL YOU HAVE 4.00V AT PIN 0 OF THE BOTTOM LM900. PLUG A GATE OUTPUT INTO THE HOLD WHILE THE ENVLOPE CYCLES. ADJUST SO THE OUTPUT IS STABLE PIN 0 BACKSIDE OF CIRCUIT BOARD
ENVELOPE SCHEMATICS ---------------------------------------------------------
POWE R BOM SU P P LY FOR A SLIM VERSION OF THE PSU. --------------Qty Value OMIT EVERYTHING BUT THE POLAR- 00n IZED CAPS IN THE +V AND -V u SECTION. BRIDGE MARKED PINS ON 4 0u THE REGULATORS. AND REPLACE THE ±5V DC-DC CONVERTER WITH A ±V 6 N4004 INSTEAD. THE +6V LINE CAN BE RUN LM7 WITH A MUCH SMALLER HEATSINK LM7 THAN SUGGESTED, SINCE CURRENT 00nH CONSUMPTION ON SAID LINE IS VERY LED S4DE50R5PDFA BUILDERS CHOICE. LOW. ADJUST ALL TRIMMERS FOR +.00V 0 AT PAD X, +6.00V AT PAD Y, AND 470 -.00V AT PAD Z. 0k k5 4k7 500 MULTI TO-0 HEATSINK TURN TRIMMER
PSU SCHEMATICS ---------------------------------------------------------