NAD 541i CD Player: purpose of four resistors?

I got a service manual (thanks, Mario!) for the NAD 541i (requests please with subject "NAD 541i": [email protected]).

I have a question, concerning four resistors: what is the purpose of the 220R resistors in the power supply part for the opamps?

Are this current limiters, for safety reason?

Do you think, they influence the sound (in a positive or negative sense)?

Kind regards
Franz
 

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Franz G said:


I have a question, concerning four resistors: what is the purpose of the 220R resistors in the power supply part for the opamps?


Hi

If you inspect with a scope , the power rails inside a CD player, you will find to much digital noise.
This RC filter , do the filtering of this high frequency rubbish ,specially because , at this high frequencies , the PSRR of the op-amps are poorer...

Regards

Jorge