Accuphase C-280, E-303X, P-266, P-300L, P-500 and others diagrams, repair etc

[StevenOH]

Will this be a good place to start?:
https://www.hifi-archiv.info/Accuphase/index.html

 

[as_audio]

What do you mean ?

 

[Mr Yamaha]

Will this be a good place to start?:
https://www.hifi-archiv.info/Accuphase/index.html

Thank you for this! Lot’s of owners manuals which were not available before.

 

[Vunce]

Any luck finding the P-300X service manual or at least the schematics?

 

[StevenOH]

Is this the correct sch?
https://www.diyaudio.com/community/...0-p-300s-schematic-wanted.350149/post-6279763

Also,
https://www.accuphase.com/cat/p-300xen.pdf

 

[as_audio]

In this picture I read P330x and it does not look like an Accuphase factory schematic.
The second one can be your guide.

However, you may be able to perform a repair without precise schematic knowledge.
Ler us know what is wrong with the amp.

 

[Vunce]

I don't believe that's an official schematic from Accuphase.
Nothing wrong yet….
I might have the opportunity to get one and wanted to check for supporting documentation for rehab and bias current settings.
HiFiengine has the p-300L and 300V service info. 300X is a mystery 😂

 

[StevenOH]

<<In this picture I read P330x>>
And I read "P300X" - in the bottom right corner of the drawing, not counting
Japanese language presence.
Maybe the whole thread discussion will help to handle any sch deviations,
if any...

 

[as_audio]

I might have the opportunity to get one and wanted to check for supporting documentation for rehab and bias current settings.

Do not touch the "bias".

 

[Vunce]

I hope there isn’t a reason to touch it, but 45 years can change things.

 

[as_audio]

Seems I have to repeat myself.

 

[m0rten]

A-45 SM

🙂 morten

 

[m0rten]

If someone is interrested, I could post others:

 

[as_audio]

Where did you find these ?

 

[m0rten]

On WWW 🙂

Sorry, but I don't remember. Hifiengine & Electrotanya are my favourites, but also other places like Chinese and Japanese forums.

 

[as_audio]

The few schematics I own (post 1) are factory papers, but the supply is gone.

 

[Vunce]

Seems I have to repeat myself.

I don't understand this response?

 

[as_audio]

Do not touch the "bias".

 

[m0rten]

If you want some, send me a PM

🙂 morten

 

[Xoverman]

Hi everyone,
I'm urgently in search of a schematic for my C-2450 and my A-48 . I would like to modify the input stage power supply's.
And a service manual is always helpful in such a case.