Thank you for viewing. This is a BOSS CH-1 analog board with a pink label. It appears to be from 1994. The following repairs and modifications have been made: Electrolytic capacitors have been replaced with Nichicon MUSE ES (audio-grade non-polar) (← green electrolytic capacitors) and some with Fine Gold. There is a change as if the clouds have cleared, and there is also a change that enriches the sound quality. (This is just my subjective opinion...) Point-to-point wiring has been applied to the bypass line to improve the sound thinning during bypass. The lead wires of each part are used for this wiring. Furthermore, the capacitance of some capacitors has been changed to further improve the sound thinning during bypass. The LED was damaged, so it has been changed to a high-brightness blue LED. Furthermore, it flashes in accordance with the RATE. A bypass capacitor has been added to the power supply section to improve noise countermeasures. The land in the red circle in the 10th photo was slightly peeled off, but it has been point-to-point wired and connected, and there are no problems with the operation. The screws (thumb screws) have been changed to silver screw style. The pedal guide push rubber has been replaced with a new one. The solder used for the modification is: Japanese Almit KR-19RMA for the main power supply section, and KESTER44 for the rest. Operation has been confirmed with an adapter and a 9V battery. There is no scratchiness in the knobs. Body only. Thank you. #Chorus #chorus #super chorus Manufacturer: BOSS