Hello to everyone,
I have a simple question: Can I replace NEC UPC4570 with OPA1642 at DAC output?
My new toy MiniDisc recorder deck SONY MDS-JE640 will get all new audio caps instead of JAMICON... so that's fun!
I removed yesterday all NEC UPC4570, original circuit from service manual shows M5218 opamps (Mitsubishi Electric), see page 41, components IC160 and IC260.
Service manual in pdf is here.
I think I could use OPA1642 also for IC390 as headphones opamp and IC350 as analog input opamp. Any thoughts about my plan please? 🙂
I appreciate your opinions, thank you very much!
Best wishes, Milan
I have a simple question: Can I replace NEC UPC4570 with OPA1642 at DAC output?
My new toy MiniDisc recorder deck SONY MDS-JE640 will get all new audio caps instead of JAMICON... so that's fun!
I removed yesterday all NEC UPC4570, original circuit from service manual shows M5218 opamps (Mitsubishi Electric), see page 41, components IC160 and IC260.
Service manual in pdf is here.
I think I could use OPA1642 also for IC390 as headphones opamp and IC350 as analog input opamp. Any thoughts about my plan please? 🙂
I appreciate your opinions, thank you very much!
Best wishes, Milan
Hi Milan, yes, you can change it to OPA1642. Op amps stability will be great and then let us know how is your progres. 🙂
Thank you, yes M5218 is in service manual but my minidisc came out from Sony factory with UPC4570. I will see, perhaps I will change headphones opamp later. Now I have replaced also all caps. Tomorrow I will put it back together and I see the results. 🙂