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Need help identifying the audio path

KinoRodori

KinoRodori

Member
Hi all, I'm a budding DIYer and I need help identifying the audio path in this schematic I have. I want to understand what parts touch the audio. :music:

I plan to do a recap soon and I know many would say it's not necessary as long as it works, but i for one like the peace of mind especially with "audio grade" caps. Of course I'm not going all out with the real boutique brands but i'm taking the learning process step by step; so for now I just really need help knowing what's on the path. :idea:

A suggested recap list is also welcome :bowdown:

I could also appreciate if anyone could go the extra mile and highlight parts that i should look closer into like fusibles, capacitors, resistors, transistors etc that are prone to deteriorate/fail due to the nature of the circuit design. :) or those worthy of a modern replacement/upgrade

My integrated is a Sony TA-F222ESA (TA-F570ES in the west) and I love it for being a versatile little beast. Though what does concern me is its phono stage, very subpar against my Sansui AU-555's phono stage. If anyone could help me understand how to make its phono stage better, that'd be swell too. :biggrin:

If I may share, i replaced its stock RC4560 opamp with an LM4562 from National. Its sound improved in all sources except phono, where it has become very flat toned and somewhat sharp. Initially i would just use the drop in replacement NJM2068 but I only had the LM4562 on hand. Now, I also have an OPA2134 my friend suggests I try. Now I'm basically asking another favor with this but I'd appreciate advice on what parts I need to change to adapt the OPA2134 into the circuit. I don't mind wasting effort as long as it's a learning experience :rockon:

Here's a link to the schematic
https://drive.google.com/file/d/1cpHwH30UVTwhekj4luV8eizhsFxZjw51/view?usp=sharing

Pretty please help me!
 
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KinoRodori said:
Hi all, I'm a budding DIYer and I need help identifying the audio path in this schematic I have. I want to understand what parts touch the audio. :music:

I plan to do a recap soon and I know many would say it's not necessary as long as it works, but i for one like the peace of mind especially with "audio grade" caps. Of course I'm not going all out with the real boutique brands but i'm taking the learning process step by step; so for now I just really need help knowing what's on the path. :idea:

A suggested recap list is also welcome :bowdown:

I could also appreciate if anyone could go the extra mile and highlight parts that i should look closer into like fusibles, capacitors, resistors, transistors etc that are prone to deteriorate/fail due to the nature of the circuit design. :) or those worthy of a modern replacement/upgrade

My integrated is a Sony TA-F222ESA (TA-F570ES in the west) and I love it for being a versatile little beast. Though what does concern me is its phono stage, very subpar against my Sansui AU-555's phono stage. If anyone could help me understand how to make its phono stage better, that'd be swell too. :biggrin:

If I may share, i replaced its stock RC4560 opamp with an LM4562 from National. Its sound improved in all sources except phono, where it has become very flat toned and somewhat sharp. Initially i would just use the drop in replacement NJM2068 but I only had the LM4562 on hand. Now, I also have an OPA2134 my friend suggests I try. Now I'm basically asking another favor with this but I'd appreciate advice on what parts I need to change to adapt the OPA2134 into the circuit. I don't mind wasting effort as long as it's a learning experience :rockon:

Here's a link to the schematic
https://drive.google.com/file/d/1cpHwH30UVTwhekj4luV8eizhsFxZjw51/view?usp=sharing

Pretty please help me!
Click to expand...
In that schematic, the signal path is indicated by an arrow. Follow the arrow from the input to the speaker output.
 
elnaldo said:
In that schematic, the signal path is indicated by an arrow. Follow the arrow from the input to the speaker output.
Click to expand...
I can't exactly get the arrow's path... There's 2 arrows from the input section and the arrows aren't consistently along the track. There's also plenty of branches along any of the paths so I can't be so sure on what I'd say is "along" the audio path :dunno:
 
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