Enclosure not stated
Roland 703EFG VCF
Based on the Roland 703EFG VCF
- Category
- Other· Filters Wahs and VCFs
- Price
- see vendor
- Tags
- Filters Wahs and VCFs
Schematic
The schematic is the archived file. Open it at Experimentalists Anonymous, or browse its folder.
Parts list 113 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
Check before you build · 7 values the reader of this schematic was not sure of
- C2: no value drawn
- C3: no value drawn
- VR9: taper '(S)' unclear, designator smudged
- VR15 trimmer: designator printed twice (5K trimmer and 50K pot)
- VR17: value faint, read 100K
- R44: leading digit faint, read 100K
- IC3/IC7: type smudged, read CA3140AT
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 60 | ||||
| R1 | 100k | 100k | read from the schematic by eye | |
| R2 | 100K | 100k | read from the schematic by eye | |
| R3 | 100K | 100k | read from the schematic by eye | |
| R4 | 100k | 100k | read from the schematic by eye | |
| R5 | 100K | 100k | read from the schematic by eye | |
| R6 | 470K | 470k | read from the schematic by eye | |
| R7 | 68K | 68k | read from the schematic by eye | |
| R8 | 1K | 1k | read from the schematic by eye | |
| R9 | 1K | 1k | read from the schematic by eye | |
| R10 | 33K | 33k | read from the schematic by eye | |
| R11 | 220 | 220 | read from the schematic by eye | |
| R12 | 220 | 220 | read from the schematic by eye | |
| R13 | 22K | 22k | read from the schematic by eye | |
| R14 | 22K | 22k | read from the schematic by eye | |
| R15 | 15K | 15k | read from the schematic by eye | |
| R16 | 470k | 470k | read from the schematic by eye | |
| R17 | 220 | 220 | read from the schematic by eye | |
| R18 | 220 | 220 | read from the schematic by eye | |
| R19 | 22K | 22k | read from the schematic by eye | |
| R20 | 22K | 22k | read from the schematic by eye | |
| R21 | 15K | 15k | read from the schematic by eye | |
| R22 | 470K | 470k | read from the schematic by eye | |
| R23 | 220 | 220 | read from the schematic by eye | |
| R24 | 220 | 220 | read from the schematic by eye | |
| R25 | 22K | 22k | read from the schematic by eye | |
| R26 | 22K | 22k | read from the schematic by eye | |
| R27 | 15K | 15k | read from the schematic by eye | |
| R28 | 470K | 470k | read from the schematic by eye | |
| R29 | 220 | 220 | read from the schematic by eye | |
| R30 | 220 | 220 | read from the schematic by eye | |
| R31 | 22K | 22k | read from the schematic by eye | |
| R32 | 22K | 22k | read from the schematic by eye | |
| R33 | 560 | 560 | read from the schematic by eye | |
| R34 | 150K | 150k | read from the schematic by eye | |
| R35 | 100K | 100k | read from the schematic by eye | |
| R36 | 22K | 22k | read from the schematic by eye | |
| R37 | 12K | 12k | read from the schematic by eye | |
| R38 | 100K | 100k | read from the schematic by eye | |
| R39 | 100K | 100k | read from the schematic by eye | |
| R40 | 100K | 100k | read from the schematic by eye | |
| R41 | 100K | 100k | read from the schematic by eye | |
| R42 | 150K | 150k | read from the schematic by eye | |
| R43 | 18K | 18k | read from the schematic by eye | |
| R44 | 100K | 100k | leading digit faint, reads '.00k'; read from the schematic by eye | |
| R45 | 12K | 12k | read from the schematic by eye | |
| R46 | 3.9K | 3.9k | read from the schematic by eye | |
| R47 | 1.5K | 1.5k | read from the schematic by eye | |
| R48 | 100K | 100k | read from the schematic by eye | |
| R49 | 330K | 330k | read from the schematic by eye | |
| R50 | 1M | 1M | read from the schematic by eye | |
| R51 | 1M | 1M | read from the schematic by eye | |
| R52 | 100K | 100k | read from the schematic by eye | |
| R53 | 4.7M | 4.7M | read from the schematic by eye | |
| R54 | 100K | 100k | labels run together ('R54 10k / 100k'); R55 10K horizontal, R54 100K to ground; read from the schematic by eye | |
| R55 | 10K | 10k | labels run together ('R54 10k / 100k'); R55 10K horizontal, R54 100K to ground; read from the schematic by eye | |
| R56 | 1M | 1M | read from the schematic by eye | |
| R57 | 10K | 10k | read from the schematic by eye | |
| R58 | 10K | 10k | read from the schematic by eye | |
| R59 | 2.2K | 2.2k | read from the schematic by eye | |
| R60 | 1K | 1k | read from the schematic by eye | |
| Capacitors 14 | ||||
| C1 | 10uF | 10u | drawn 10/16: 16V electrolytic; read from the schematic by eye | |
| C2 | ? | ? | no value drawn; integrator cap of IC3, likely 470P like C4/C5; read from the schematic by eye | |
| C3 | ? | ? | no value drawn; integrator cap of IC5, likely 470P like C4/C5; read from the schematic by eye | |
| C4 | 470P | 470p | read from the schematic by eye | |
| C5 | 470P | 470p | read from the schematic by eye | |
| C6 | .01uF | 10n | read from the schematic by eye | |
| C7 | .01uF | 10n | read from the schematic by eye | |
| C8 | 1uF | 1u | drawn 1/50: 50V electrolytic; read from the schematic by eye | |
| C9 | .1uF | 100n | read from the schematic by eye | |
| C10 | .1uF | 100n | read from the schematic by eye | |
| C11 | 10uF | 10u | drawn 10/16 NP: 16V non-polar; read from the schematic by eye | |
| C12 | 10uF | 10u | drawn 10/16: 16V electrolytic; read from the schematic by eye | |
| C13 | 10uF | 10u | drawn 10/16: 16V electrolytic; read from the schematic by eye | |
| C14 | 10uF | 10u | drawn 10/16: 16V electrolytic; read from the schematic by eye | |
| Diodes 1 | ||||
| D1 | Diode | DIODE | no part number given; read from the schematic by eye | |
| Transistors 6 | ||||
| Q1 | 2SC945Q | 2SC945Q | read from the schematic by eye | |
| Q2 | 2SA733Q | 2SA733Q | read from the schematic by eye | |
| Q3 | ? | ? | NPN, no part number given; read from the schematic by eye | |
| Q4 | ? | ? | NPN, no part number given; read from the schematic by eye | |
| Q5 | 2SC945Q | 2SC945Q | read from the schematic by eye | |
| Q6 | 2SA733Q | 2SA733Q | drawn '2SA733Q' (smudged); read from the schematic by eye | |
| ICs 11 | ||||
| IC1 | CA3080 | CA3080 | OTA; read from the schematic by eye | |
| IC2 | CA3080 | CA3080 | OTA; read from the schematic by eye | |
| IC3 | CA3140AT | CA3140AT | label smudged; read from the schematic by eye | |
| IC4 | CA3080 | CA3080 | OTA; read from the schematic by eye | |
| IC5 | CA3140AT | CA3140AT | read from the schematic by eye | |
| IC6 | CA3080 | CA3080 | OTA; read from the schematic by eye | |
| IC7 | CA3140AT | CA3140AT | label smudged; read from the schematic by eye | |
| IC8 | CA3080 | CA3080 | OTA; read from the schematic by eye | |
| IC9 | CA3140AT | CA3140AT | read from the schematic by eye | |
| IC10 | uPC1458 | UPC1458 | dual op amp, sections A and B; read from the schematic by eye | |
| IC11 | ? | ? | quad 2-input CMOS NOR gate (A-D), no part number given; read from the schematic by eye | |
| Potentiometers 15 | ||||
| VR1 | A100K | A100k | Potentiometer | VCO-1 level; read from the schematic by eye |
| VR2 | A100K | A100k | Potentiometer | VCO-2 level; read from the schematic by eye |
| VR3 | A100K | A100k | Potentiometer | VCO-3 level; read from the schematic by eye |
| VR4 | A100K | A100k | Potentiometer | noise level; read from the schematic by eye |
| VR5 | A100K | A100k | Potentiometer | external input level; read from the schematic by eye |
| VR6 | B100K | B100k | Potentiometer | read from the schematic by eye |
| VR7 | B100K | B100k | Potentiometer | read from the schematic by eye |
| VR8 | B100K | B100k | Potentiometer | read from the schematic by eye |
| VR9 | 100K | 100k | Potentiometer | taper letter reads '(S)', unclear; designator smudged ('VF7'); read from the schematic by eye |
| VR10 | B100K | B100k | Potentiometer | read from the schematic by eye |
| VR11 | B100K | B100k | Potentiometer | ADSR CV; read from the schematic by eye |
| VR12 | B100K | B100k | Potentiometer | LFO CV; read from the schematic by eye |
| VR13 | B100K | B100k | Potentiometer | keyboard CV; read from the schematic by eye |
| VR14 | B100K | B100k | Potentiometer | external CV; read from the schematic by eye |
| VR15 | B50K | B50k | Potentiometer | read from the schematic by eye |
| Trimmers 2 | ||||
| VR15-trim | 5K | 5k | trimmer in IC10A feedback with R43, also labelled VR15 on the drawing (designator clash; probably VR16); read from the schematic by eye | |
| VR17 | 100K | 100k | offset trimmer between B+ and B-; value faint; read from the schematic by eye | |
| Switches 1 | ||||
| ×1 | SPDT | SPDT | ADSR1/ADSR2 select switch; read from the schematic by eye | |
| LEDs 2 | ||||
| D3 | GL32AR | GL32AR | red LED; read from the schematic by eye | |
| D4 | GL32PG | GL32PG | green LED; read from the schematic by eye | |
| Other 1 | ||||
| D2 | SDT-1000 | SDT-1000 | thermistor-like device in the Q1 base network; read from the schematic by eye | |