Service manuals and schematic diagrams are top secret (confidential) and thus not released; even under
https://www.hifiengine.com/manual_library/accuphase/c-2450.shtml
https://www.hifiengine.com/manual_library/accuphase/a-48.shtml
only the owner's manual are available.
in this review under
https://www.accuphase.com/review_pdf/stereo_05-2018_C-2450_A-47.pdf
and the brochure under
https://www.accuphase.com/cat/c-2450_g.pdf
are also several images of the internal units.
Compared to Class-D approaches and other digital stuff like DAC with usb input very simple topology - thus own creating of the circuit diagrams after tear down the devices with help only of the PCB's isn't very difficult.
https://www.hifiengine.com/manual_library/accuphase/c-2450.shtml
https://www.hifiengine.com/manual_library/accuphase/a-48.shtml
only the owner's manual are available.
in this review under
https://www.accuphase.com/review_pdf/stereo_05-2018_C-2450_A-47.pdf
and the brochure under
https://www.accuphase.com/cat/c-2450_g.pdf
are also several images of the internal units.
Compared to Class-D approaches and other digital stuff like DAC with usb input very simple topology - thus own creating of the circuit diagrams after tear down the devices with help only of the PCB's isn't very difficult.
All true, but specific details like idle bias voltage spec and VU meter calibration procedure would be helpful to know.
Thanks for the fast reply.
I wish some day there will be a law that they have to give you a schematic of the device you own.
I do know how to reengineer amplifiers, but it's a pain I the A... And it takes time.
All Accuphase amplifiers are built similar. I did study older schematics that are available.
There don't seem to be very many Accuphase forums around. That's strange.
Maybe I'll open up a Accuphase modification forum.
Cheers from Germany
I wish some day there will be a law that they have to give you a schematic of the device you own.
I do know how to reengineer amplifiers, but it's a pain I the A... And it takes time.
All Accuphase amplifiers are built similar. I did study older schematics that are available.
There don't seem to be very many Accuphase forums around. That's strange.
Maybe I'll open up a Accuphase modification forum.
Cheers from Germany
Hi everyone,
I’m currently restoring an Accuphase P-300X power amplifier and I’m looking for the original service manual, or at least a detailed schematic that includes part specifications and bias adjustment settings. So far, I’ve only found partial diagrams and basic catalogs.
If anyone has access to the official service documentation or a hand-drawn full schematic, I’d really appreciate your help.
Alternatively, if anyone is skilled in reverse engineering and could help me digitize the schematic from board traces or photos, I’d be happy to collaborate.
Thank you in advance for any guidance!
I’m currently restoring an Accuphase P-300X power amplifier and I’m looking for the original service manual, or at least a detailed schematic that includes part specifications and bias adjustment settings. So far, I’ve only found partial diagrams and basic catalogs.
If anyone has access to the official service documentation or a hand-drawn full schematic, I’d really appreciate your help.
Alternatively, if anyone is skilled in reverse engineering and could help me digitize the schematic from board traces or photos, I’d be happy to collaborate.
Thank you in advance for any guidance!
