Enclosure not stated · 7 knobs
Roland TB-303
Based on the Roland TB-303
- Category
- Ring Mod / Synth· Full Synths Drum Synths and Misc Synth
- Price
- see vendor
- Tags
- Full Synths Drum Synths and Misc Synth
Schematic
The schematic is the archived file. Open it at Experimentalists Anonymous, or browse its folder.
Parts list 266 rows
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Check before you build · 6 values the reader of this schematic was not sure of
- R102: printed '100 (B) K', read 100K
- R126: value obscured, marked 'Roland typo', read 2.2K
- R86: ladder label reads like R96
- TM4: value not legible
- Cutoff Freq (VR3): no value printed
- C22 and D27: designators printed twice
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 126 | ||||
| R34 | 10K | 10k | read from the schematic by eye | |
| R35 | 100K | 100k | read from the schematic by eye | |
| R36 | 10K | 10k | read from the schematic by eye | |
| R45 | 22K | 22k | read from the schematic by eye | |
| R46 | 47K | 47k | read from the schematic by eye | |
| R47 | 10K | 10k | read from the schematic by eye | |
| R59 | 100K | 100k | read from the schematic by eye | |
| R61 | 10K | 10k | read from the schematic by eye | |
| R62 | 220K | 220k | read from the schematic by eye | |
| R63 | 220K | 220k | read from the schematic by eye | |
| R64 | 10K | 10k | read from the schematic by eye | |
| R65 | 10K | 10k | read from the schematic by eye | |
| R66 | 100K | 100k | read from the schematic by eye | |
| R67 | 2.2K | 2.2k | read from the schematic by eye | |
| R68 | 2.2K | 2.2k | read from the schematic by eye | |
| R69 | 2.2K | 2.2k | read from the schematic by eye | |
| R70 | 2.2K | 2.2k | read from the schematic by eye | |
| R71 | 2.2K | 2.2k | read from the schematic by eye | |
| R72 | 100K | 100k | read from the schematic by eye | |
| R73 | 100K | 100k | read from the schematic by eye | |
| R74 | 200K | 200k | per note '(R74-R90) 200K', matched pairs, 0.1% selected; read from the schematic by eye | |
| R75 | 200K | 200k | per note '(R74-R90) 200K', matched pairs, 0.1% selected; read from the schematic by eye | |
| R76 | 200K | 200k | per note '(R74-R90) 200K', matched pairs, 0.1% selected; read from the schematic by eye | |
| R77 | 200K | 200k | per note '(R74-R90) 200K', matched pairs, 0.1% selected; read from the schematic by eye | |
| R78 | 200K | 200k | per note '(R74-R90) 200K', matched pairs, 0.1% selected; read from the schematic by eye | |
| R79 | 200K | 200k | per note '(R74-R90) 200K', matched pairs, 0.1% selected; read from the schematic by eye | |
| R80 | 200K | 200k | per note '(R74-R90) 200K', matched pairs, 0.1% selected; read from the schematic by eye | |
| R81 | 200K | 200k | per note '(R74-R90) 200K', matched pairs, 0.1% selected; read from the schematic by eye | |
| R82 | 200K | 200k | per note '(R74-R90) 200K', matched pairs, 0.1% selected; read from the schematic by eye | |
| R83 | 200K | 200k | per note '(R74-R90) 200K', matched pairs, 0.1% selected; read from the schematic by eye | |
| R84 | 200K | 200k | per note '(R74-R90) 200K', matched pairs, 0.1% selected; read from the schematic by eye | |
| R85 | 200K | 200k | per note '(R74-R90) 200K', matched pairs, 0.1% selected; read from the schematic by eye | |
| R86 | 200K | 200k | ladder resistor; label reads like 'R96' but R96 is the VCF 10K, so taken as R86; read from the schematic by eye | |
| R87 | 200K | 200k | per note '(R74-R90) 200K', matched pairs, 0.1% selected; read from the schematic by eye | |
| R88 | 200K | 200k | per note '(R74-R90) 200K', matched pairs, 0.1% selected; read from the schematic by eye | |
| R89 | 200K | 200k | per note '(R74-R90) 200K', matched pairs, 0.1% selected; read from the schematic by eye | |
| R90 | 200K | 200k | per note '(R74-R90) 200K', matched pairs, 0.1% selected; read from the schematic by eye | |
| R91 | 1M | 1M | read from the schematic by eye | |
| R92 | 100K | 100k | read from the schematic by eye | |
| R93 | 100K | 100k | read from the schematic by eye | |
| R94 | 10K | 10k | read from the schematic by eye | |
| R95 | 100 | 100 | read from the schematic by eye | |
| R96 | 10K | 10k | read from the schematic by eye | |
| R97 | 10K | 10k | read from the schematic by eye | |
| R98 | 2.2K | 2.2k | read from the schematic by eye | |
| R99 | 100K | 100k | read from the schematic by eye | |
| R100 | 560 | 560 | posistor (PTC); read from the schematic by eye | |
| R101 | 10K | 10k | read from the schematic by eye | |
| R102 | 100K | 100k | value printed '100 (B) K' beside TM4; read 100K; read from the schematic by eye | |
| R103 | 220K | 220k | read from the schematic by eye | |
| R104 | 2.2K | 2.2k | read from the schematic by eye | |
| R105 | 10K | 10k | read from the schematic by eye | |
| R106 | 27K | 27k | read from the schematic by eye | |
| R107 | 2.2K | 2.2k | read from the schematic by eye | |
| R108 | 2.2K | 2.2k | read from the schematic by eye | |
| R109 | 10K | 10k | read from the schematic by eye | |
| R110 | 22K | 22k | read from the schematic by eye | |
| R111 | 22K | 22k | read from the schematic by eye | |
| R112 | 10K | 10k | read from the schematic by eye | |
| R113 | 100K | 100k | read from the schematic by eye | |
| R114 | 100K | 100k | read from the schematic by eye | |
| R115 | 10K | 10k | read from the schematic by eye | |
| R116 | 10K | 10k | read from the schematic by eye | |
| R117 | 22K | 22k | read from the schematic by eye | |
| R118 | 100K | 100k | read from the schematic by eye | |
| R119 | 47K | 47k | read from the schematic by eye | |
| R120 | 22K | 22k | read from the schematic by eye | |
| R121 | 220K | 220k | read from the schematic by eye | |
| R122 | 100K | 100k | read from the schematic by eye | |
| R123 | 1.5M | 1.5M | read from the schematic by eye | |
| R124 | 2.2K | 2.2k | read from the schematic by eye | |
| R125 | 2.2K | 2.2k | read from the schematic by eye | |
| R126 | 2.2K | 2.2k | value digit obscured, annotated 'Roland typo' on the sheet; read 2.2K; read from the schematic by eye | |
| R127 | 47K | 47k | read from the schematic by eye | |
| R128 | 220K | 220k | read from the schematic by eye | |
| R129 | 22K | 22k | read from the schematic by eye | |
| R130 | 100 | 100 | read from the schematic by eye | |
| R131 | 220K | 220k | read from the schematic by eye | |
| R132 | 100 | 100 | read from the schematic by eye | |
| R133 | 2.2K | 2.2k | read from the schematic by eye | |
| R134 | 22K | 22k | read from the schematic by eye | |
| R135 | 4.7K | 4.7k | read from the schematic by eye | |
| R136 | 100 | 100 | read from the schematic by eye | |
| R137 | 1K | 1k | read from the schematic by eye | |
| R138 | 68K | 68k | read from the schematic by eye | |
| R139 | 100K | 100k | read from the schematic by eye | |
| R140 | 100K | 100k | read from the schematic by eye | |
| R141 | 100K | 100k | read from the schematic by eye | |
| R142 | 10K | 10k | read from the schematic by eye | |
| R143 | 10K | 10k | read from the schematic by eye | |
| R144 | 10K | 10k | read from the schematic by eye | |
| R145 | 10K | 10k | read from the schematic by eye | |
| R146 | 22K | 22k | read from the schematic by eye | |
| R147 | 22 | 22 | read from the schematic by eye | |
| R148 | 10K | 10k | read from the schematic by eye | |
| R149 | 10K | 10k | read from the schematic by eye | |
| R150 | 22 | 22 | read from the schematic by eye | |
| R151 | 22K | 22k | read from the schematic by eye | |
| R152 | 100 | 100 | read from the schematic by eye | |
| R153 | 100K | 100k | read from the schematic by eye | |
| R154 | 100K | 100k | read from the schematic by eye | |
| R155 | 47K | 47k | read from the schematic by eye | |
| R156 | 100K | 100k | read from the schematic by eye | |
| R157 | 10K | 10k | read from the schematic by eye | |
| R158 | 10K | 10k | read from the schematic by eye | |
| R159 | 33K | 33k | read from the schematic by eye | |
| R160 | 10K | 10k | read from the schematic by eye | |
| R161 | 1K | 1k | read from the schematic by eye | |
| R162 | 2.2K | 2.2k | read from the schematic by eye | |
| R163 | 10 | 10 | drawn '10 x2' for R163/R164; read from the schematic by eye | |
| R164 | 10 | 10 | drawn '10 x2'; read from the schematic by eye | |
| R165 | 100K | 100k | read from the schematic by eye | |
| R166 | 100K | 100k | read from the schematic by eye | |
| R167 | 1.5K | 1.5k | read from the schematic by eye | |
| R168 | 2.7 | 2.7 | FRN 1/4W fusible; read from the schematic by eye | |
| R169 | 1.5K | 1.5k | read from the schematic by eye | |
| R170 | 22 | 22 | read from the schematic by eye | |
| R171 | 3.3K | 3.3k | read from the schematic by eye | |
| R172 | 100 | 100 | read from the schematic by eye | |
| R173 | 1K | 1k | read from the schematic by eye | |
| R174 | 5.6K | 5.6k | read from the schematic by eye | |
| R176 | 6.8K | 6.8k | read from the schematic by eye | |
| R177 | 6.8K | 6.8k | read from the schematic by eye | |
| R178 | 2.2K | 2.2k | read from the schematic by eye | |
| R179 | 1.8K | 1.8k | read from the schematic by eye | |
| R180 | 39K | 39k | read from the schematic by eye | |
| Capacitors 60 | ||||
| C1 | 100uF | 100u | 6.3V electrolytic; read from the schematic by eye | |
| C10 | .01uF | 10n | read from the schematic by eye | |
| C11 | 1uF | 1u | 50V electrolytic; read from the schematic by eye | |
| C13 | 1uF | 1u | 50V electrolytic; read from the schematic by eye | |
| C14 | 1uF | 1u | 50V electrolytic; read from the schematic by eye | |
| C15 | 1uF | 1u | 50V electrolytic; read from the schematic by eye | |
| C16 | 10uF | 10u | 16V electrolytic; read from the schematic by eye | |
| C17 | 1uF | 1u | 50V electrolytic; read from the schematic by eye | |
| C18 | .018uF | 18n | read from the schematic by eye | |
| C19 | .033uF | 33n | read from the schematic by eye | |
| C21 | .01uF | 10n | read from the schematic by eye | |
| C22 | .01uF | 10n | VCA; designator C22 also printed on a 1uF/50V electrolytic in the VCF (see C22-VCF); read from the schematic by eye | |
| C22-VCF | 1uF | 1u | 50V electrolytic in the VCF beside R66; duplicate designator on the drawing; read from the schematic by eye | |
| C23 | 1uF | 1u | 50V electrolytic; read from the schematic by eye | |
| C24 | .033uF | 33n | read from the schematic by eye | |
| C25 | .1uF | 100n | read from the schematic by eye | |
| C26 | .033uF | 33n | read from the schematic by eye | |
| C27 | .1uF | 100n | read from the schematic by eye | |
| C28 | 47uF | 47u | 16V electrolytic; read from the schematic by eye | |
| C29 | 1uF | 1u | 50V electrolytic; read from the schematic by eye | |
| C30 | 10uF | 10u | 16V electrolytic; read from the schematic by eye | |
| C31 | 10uF | 10u | 16V electrolytic; read from the schematic by eye | |
| C32 | 10uF | 10u | 16V electrolytic; read from the schematic by eye | |
| C33 | .01uF | 10n | read from the schematic by eye | |
| C34 | .001uF | 1n | read from the schematic by eye | |
| C35 | .22uF | 220n | read from the schematic by eye | |
| C36 | .033uF | 33n | read from the schematic by eye | |
| C37 | 10uF | 10u | 16V electrolytic; read from the schematic by eye | |
| C38 | 1uF | 1u | 50V electrolytic; read from the schematic by eye | |
| C40 | 10uF | 10u | 16V electrolytic; read from the schematic by eye | |
| C41 | .1uF | 100n | read from the schematic by eye | |
| C42 | 1uF | 1u | 35V electrolytic; read from the schematic by eye | |
| C43 | 1000uF | 1m | 6.3V electrolytic; read from the schematic by eye | |
| C44 | 47uF | 47u | 16V electrolytic; read from the schematic by eye | |
| C45 | .068uF | 68n | read from the schematic by eye | |
| C46 | .01uF | 10n | read from the schematic by eye | |
| C47 | .0068uF | 6.8n | read from the schematic by eye | |
| C48 | 100uF | 100u | 6.3V electrolytic; read from the schematic by eye | |
| C49 | 100uF | 100u | 6.3V electrolytic; read from the schematic by eye | |
| C50 | 10uF | 10u | 16V electrolytic; read from the schematic by eye | |
| C51 | 2.2uF | 2.2u | 50V electrolytic; read from the schematic by eye | |
| C52 | 10uF | 10u | 16V electrolytic; read from the schematic by eye | |
| C53 | 47uF | 47u | 16V electrolytic; read from the schematic by eye | |
| C54 | .047uF | 47n | read from the schematic by eye | |
| C55 | 47uF | 47u | 16V electrolytic; read from the schematic by eye | |
| C56 | 1uF | 1u | 50V electrolytic; read from the schematic by eye | |
| C58 | 1uF | 1u | 50V electrolytic; read from the schematic by eye | |
| C59 | 1uF | 1u | 50V electrolytic; read from the schematic by eye | |
| C60 | 10uF | 10u | 16V electrolytic; read from the schematic by eye | |
| C61 | 10uF | 10u | 16V electrolytic; read from the schematic by eye | |
| C62 | 1uF | 1u | 35V electrolytic; read from the schematic by eye | |
| C63 | 100uF | 100u | 16V electrolytic; read from the schematic by eye | |
| C64 | 10uF | 10u | 16V electrolytic; read from the schematic by eye | |
| C65 | 10uF | 10u | 16V electrolytic; read from the schematic by eye | |
| C66 | .0022uF | 2.2n | read from the schematic by eye | |
| C67 | 10uF | 10u | 16V electrolytic; read from the schematic by eye | |
| C68 | 47uF | 47u | 16V electrolytic; read from the schematic by eye | |
| C69 | 47uF | 47u | 16V electrolytic; read from the schematic by eye | |
| C70 | 10uF | 10u | 16V electrolytic; read from the schematic by eye | |
| C72 | 10uF | 10u | 16V electrolytic; read from the schematic by eye | |
| Diodes 21 | ||||
| D2 | Diode | DIODE | no part number given; read from the schematic by eye | |
| D24 | Diode | DIODE | no part number given; read from the schematic by eye | |
| D25 | Diode | DIODE | no part number given; read from the schematic by eye | |
| D26 | Diode | DIODE | no part number given; read from the schematic by eye | |
| D27 | Diode | DIODE | no part number given; D27 printed twice (VCA, before R120, and ENV chain D28-D27-D26), see D27-ENV; read from the schematic by eye | |
| D27-ENV | Diode | DIODE | no part number given; duplicate designator in the ENV chain; read from the schematic by eye | |
| D28 | Diode | DIODE | no part number given; read from the schematic by eye | |
| D30 | Diode | DIODE | no part number given; read from the schematic by eye | |
| D31 | Diode | DIODE | no part number given; read from the schematic by eye | |
| D32 | Diode | DIODE | no part number given; read from the schematic by eye | |
| D33 | Diode | DIODE | no part number given; read from the schematic by eye | |
| D34 | Diode | DIODE | no part number given; read from the schematic by eye | |
| D35 | Diode | DIODE | no part number given; read from the schematic by eye | |
| D36 | Diode | DIODE | no part number given; read from the schematic by eye | |
| D37 | Diode | DIODE | no part number given; read from the schematic by eye | |
| D38 | Diode | DIODE | no part number given; read from the schematic by eye | |
| D39 | Diode | DIODE | no part number given; read from the schematic by eye | |
| D40 | RD6.8EB3 | RD6.8EB3 | 6.8V zener; read from the schematic by eye | |
| D41 | Diode | DIODE | no part number given; read from the schematic by eye | |
| D42 | RD15EB3 | RD15EB3 | 15V zener; label printed 'RD15 EB3'; read from the schematic by eye | |
| D43 | 1SZ46A | 1SZ46A | zener; read from the schematic by eye | |
| Transistors 38 | ||||
| Q8 | ? | ? | no part number given; NPN by symbol; read from the schematic by eye | |
| Q9 | ? | ? | no part number given; NPN by symbol; read from the schematic by eye | |
| Q10 | ? | ? | no part number given; NPN by symbol; read from the schematic by eye | |
| Q11 | ? | ? | no part number given; NPN by symbol; read from the schematic by eye | |
| Q12 | 2SC1583 | 2SC1583 | dual (matched pair) transistor; read from the schematic by eye | |
| Q13 | ? | ? | no part number given; ladder-filter transistor; read from the schematic by eye | |
| Q14 | ? | ? | no part number given; ladder-filter transistor; read from the schematic by eye | |
| Q15 | ? | ? | no part number given; ladder-filter transistor; read from the schematic by eye | |
| Q16 | ? | ? | no part number given; ladder-filter transistor; read from the schematic by eye | |
| Q17 | ? | ? | no part number given; ladder-filter transistor; read from the schematic by eye | |
| Q18 | ? | ? | no part number given; NPN by symbol; read from the schematic by eye | |
| Q19 | ? | ? | no part number given; NPN by symbol; read from the schematic by eye | |
| Q20 | ? | ? | no part number given; NPN by symbol; read from the schematic by eye | |
| Q21 | 2SC1583 | 2SC1583 | dual (matched pair) transistor; read from the schematic by eye | |
| Q22 | 2SC2291 | 2SC2291 | dual (matched pair) transistor; read from the schematic by eye | |
| Q23 | ? | ? | no part number given; ladder-filter transistor; read from the schematic by eye | |
| Q24 | ? | ? | no part number given; PNP by symbol; read from the schematic by eye | |
| Q25 | ? | ? | no part number given; PNP by symbol; read from the schematic by eye | |
| Q26 | 2SC1583 | 2SC1583 | dual (matched pair) transistor; read from the schematic by eye | |
| Q27 | ? | ? | no part number given; NPN by symbol; read from the schematic by eye | |
| Q28 | 2SK30(O) | 2SK30(O) | read from the schematic by eye | |
| Q29 | ? | ? | no part number given; NPN by symbol; read from the schematic by eye | |
| Q30 | ? | ? | no part number given; PNP by symbol; read from the schematic by eye | |
| Q31 | ? | ? | no part number given; PNP by symbol; read from the schematic by eye | |
| Q32 | ? | ? | no part number given; NPN by symbol; read from the schematic by eye | |
| Q33 | ? | ? | no part number given; PNP by symbol; read from the schematic by eye | |
| Q34 | ? | ? | no part number given; NPN by symbol; read from the schematic by eye | |
| Q35 | ? | ? | no part number given; NPN by symbol; read from the schematic by eye | |
| Q36 | ? | ? | no part number given; PNP by symbol; read from the schematic by eye | |
| Q37 | ? | ? | no part number given; NPN by symbol; read from the schematic by eye | |
| Q38 | ? | ? | no part number given; PNP by symbol; read from the schematic by eye | |
| Q39 | 2SK30(Y) | 2SK30(Y) | read from the schematic by eye | |
| Q40 | ? | ? | no part number given; NPN by symbol; read from the schematic by eye | |
| Q41 | ? | ? | no part number given; NPN by symbol; read from the schematic by eye | |
| Q42 | 2SC536 | 2SC536 | read from the schematic by eye | |
| Q43 | 2SD667C | 2SD667C | read from the schematic by eye | |
| Q44 | 2SB647(C) | 2SB647(C) | read from the schematic by eye | |
| Q45 | 2SB596(O) | 2SB596(O) | read from the schematic by eye | |
| ICs 8 | ||||
| IC9 | 4174 | 4174 | hex D flip-flop; read from the schematic by eye | |
| IC10 | 4050 | 4050 | hex buffer; read from the schematic by eye | |
| IC11 | AN6562 | AN6562 | dual op amp, sections a/b; read from the schematic by eye | |
| IC12 | 4066 | 4066 | quad bilateral switch; read from the schematic by eye | |
| IC13 | HD14013 | HD14013 | dual D flip-flop; read from the schematic by eye | |
| IC14 | LA4140 | LA4140 | headphone amp; read from the schematic by eye | |
| IC15 | BA662A | BA662A | OTA (VCA); read from the schematic by eye | |
| IC16 | AN6562 | AN6562 | dual op amp (power supply reference); read from the schematic by eye | |
| Potentiometers 7 | ||||
| Tuning | B50K | B50k | Potentiometer | VR2, drawn '50K(B)'; read from the schematic by eye |
| Cutoff Freq | ? | ? | Potentiometer | VR3, no value printed (page 3 parts list shows the panel pots as 50kA/50kB/1MA); read from the schematic by eye |
| Resonance | B50K | B50k | Potentiometer | VR4, dual-gang, drawn '50K(B)'; read from the schematic by eye |
| Env Mod | A50K | A50k | Potentiometer | VR5; read from the schematic by eye |
| Env Decay | A1M | A1M | Potentiometer | VR6; read from the schematic by eye |
| Accent | B50K | B50k | Potentiometer | VR7; read from the schematic by eye |
| Volume | A50K | A50k | Potentiometer | VR8; read from the schematic by eye |
| Trimmers 4 | ||||
| TM3 | 470K | 470k | FREQ; read from the schematic by eye | |
| TM4 | ? | ? | TUNE; value not clear ('(B)' printed beside it); read from the schematic by eye | |
| TM5 | 4.7K | 4.7k | WIDTH; read from the schematic by eye | |
| TM6 | 4.7K | 4.7k | CV; read from the schematic by eye | |
| Switches 2 | ||||
| S1 | SPDT | SPDT | waveform select; read from the schematic by eye | |
| Power | SPST | SPST | power switch; read from the schematic by eye | |