4558칩 : https://www.eleparts.co.kr/goods/view?no=8313964
RC4558DR
OP AMP, DUAL GEN PURPOSE, SMD, 4558
www.eleparts.co.kr
볼륨 가변저항 : https://ko.aliexpress.com/item/1005005400589877.html?spm=a2g0o.order_list.order_list_main.132.3c38140fAHSjZt&gatewayAdapt=glo2kor
2804.0₩ |게임보이 컬러 GBC 마더보드용 볼륨 온/오프 수리 부품, 2 개입| | - AliExpress
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