SERVICE PARTS SERIES 300 MIXER
mono
| CHANNEL | FUNCT. | POTENTIOMETER | KNOB | CAP | MISC. |
| MONO | PHANTOM | Switch/10550400 | Black/10450184 | n.a. | n.a. |
| MIC/LINE | Switch/10550400 | Black/10450184 | n.a. | n.a. | |
| MIC/LINE | GAIN | 10KCB/10300106 | Black/10450193 | Red/10450152 | n.a. |
| HIGH | 100KLIN/10300113 | Black/10450193 | Green/10450194 | n.a. | |
| MID | 100KLIN/10300113 | Black/10450193 | Green/10450194 | n.a. | |
| LOW | 100KLIN/10300113 | Black/10450193 | Green/10450194 | n.a. | |
| AUX1 | 10KLOG/10300104 | Black/10450193 | Gray/10450195 | n.a. | |
| AUX2 | 10KLOG/10300104 | Black/10450193 | Gray/10450195 | n.a. | |
| PANPOT | 10KLIN/10300103 | Black/10450193 | Gray/10450195 | n.a. | |
| PFL | SwitchAlps/10550400 | Black/10450184 | n.a. | n.a. | |
| MUTE | SwitchAlps/10550400 | Red/10450189 | n.a. | n.a. | |
| MK1 | FADER | 58mm Radiohm /10300443 | Black/10450088 | n.a. | n.a. |
| MK2 | FADER | 100mm JP/10300089 | Black/10450088 | n.a. | n.a. |
| Transistors | BC560/10250327 | BC546/10250328 | |||
| IC's | TL074/10250305 | TL071/10250303 | |||
| INPUTS | XLR | XLR fem/10600427 | JackSt/10600433 | JackBr/10600432 |
stereo
| CHANNEL | FUNCT. | POTENTIOMETER | KNOB | CAP | MISC. |
| STEREO | |||||
| MIC/LINE | Switch/10550400 | Black/10450184 | n.a. | n.a. | |
| MIC/LINE | GAIN | 100KAx2/10300114 | Black/10450193 | Red/10450152 | n.a. |
| HIGH | 100KAx2/10300114 | Black/10450193 | Green/10450194 | n.a. | |
| MID | 100KAx2/10300114 | Black/10450193 | Green/10450194 | n.a. | |
| LOW | 100KAx2/10300114 | Green/10450194 | n.a. | ||
| AUX1 | 22KLOG/10300109 | Black/10450193 | Gray/10450195 | n.a. | |
| AUX2 | 22KLOG/10300109 | Black/10450193 | Gray/10450195 | n.a. | |
| PANPOT | 10KLIN/10300103 | Black/10450193 | Gray/10450195 | n.a. | |
| PFL | SwitchAlps/10550400 | Black/10450184 | n.a. | n.a. | |
| MUTE | SwitchAlps/10550400 | Red/10450189 | n.a. | n.a. | |
| MK1 | FADER | 58mm Radiohm /10300444 | Black/10450088 | n.a. | n.a. |
| MK2 | FADER | 100mm JP/10300089 | Black/10450088 | n.a. | n.a. |
| Transistors | BC546/10250328 | ||||
| IC's | TL074/10250305 | TL072/10250304 | 5532/10250307 |
master
| MASTER | FUNCT. | POTS/MISC. | KNOB | CAP | MISC. |
| AUX1 mstr | 10KLOG/10300104 | Black/10450193 | Gray/10450195 | n.a. | |
| AUX2 mstr | 10KLOG/10300104 | Black/10450193 | Gray/10450195 | n.a. | |
| AUX2 returns | 10KLOG/10300104 | Black/10450193 | Gray/10450195 | n.a. | |
| AUX2 returns | 22KLOGSt/10300109 | Black/10450193 | Gray/10450195 | n.a. | |
| PHONES | 22KLOGSt/10300109 | Black/10450193 | Red/10450152 | n.a. | |
| Power switch | Switch /10550406 | ||||
| IC's | TL072/10250304 | TL074/10250305 | TL071/10250303 | UAA180/10250308 | |
| Transistors | BC337/10250332 | BC546/10250328 | n.a. | ||
| POWERSUPPLY | 7815/10250320 | 7915/10250321 | 7824/10250324 | ||
| MK1 | FADER | Radiohm/10300443 | Black/10450181 | n.a. | n.a. |
| MK2 | FADER | 100mm JP/10300089 | Black/10450088 | n.a. | n.a. |
| IN/OUTPUTS | Jack Break Cliff | part nr 10600432 |