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Yamaha CA-810 Schematic Issues

Yamaha5000 said:
Any thoughts on these waveforms?
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Not really.. I'd be more concerned with measured DC voltage with a multimeter. I'm assuming your volts/div. is 5v per div. on the scope.. Can't tell by your photo.
 
At this point I have absolutely no confidence in the validity / accuracy of the published schematic.Without a CA-810 physically sitting in front of me.
 
I have to go drain a water heater. :D Damn thing crapped out on me.
 
clinic-audio said:
And what do you think about this :

https://www.grosfichiers.com/xBF6xnviRA6

you will download CA810 SM high definition scanned pages

I don't think you will find better than that anywhere on the web except on AK !
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Patric

THANK YOU VERY MUCH! THIS WILL BE OF GREAT ASSISTANCE! :)

I will see here if I can explain my concern again: As Avionic has stated many times, we have no faith in the information provided by Yamaha on 810 is accurate, this was first proven with the location of the transistors. Would it not make sense that since this error that the board traces and component values and locations could also be incorrect? Have you compared these power supply drawings to the actual board in your possession? Have you verified the values of the resistors R801-R824, diodes D801-D812 and capacitors C801-C813 as shown in the schedules and schematic match the drawings you have sent this morning?
 
Hello

No , sorry , I did not . Not enough time , many customers waiting . I will probably make a clean service manual for CA810 but not now

PATRICE
 
Just for the heck of it I just went to the bench and checked the voltage at jumper 9 and 10. 9 now reads -26v, 10 still reads +1v
 
Patric

I am not sure what you are trying to tell me with this schematic, maybe you could explain in detail?
 
I just made this schematic to make a sure base at 100% . Forget all the papers or info coming from the service manual . My schematic precise you exactly what TR is , with the adequat reference for example TR806 should be a 2SD234 nothing else

I honestly don't understand why it is so complicate .

I did take a quick look in the parts list of the service manual and all semi-conductors are not referenced with TR603 or TR604 . There is just the manufacturer reference like 2SD234

To resolve your problem , I think you need nothing more
 
clinic-audio said:
I just made this schematic to make a sure base at 100% . Forget all the papers or info coming from the service manual . My schematic precise you exactly what TR is , with the adequat reference for example TR806 should be a 2SD234 nothing else

I honestly don't understand why it is so complicate .

I did take a quick look in the parts list of the service manual and all semi-conductors are not referenced with TR603 or TR604 . There is just the manufacturer reference like 2SD234

To resolve your problem , I think you need nothing more
Click to expand...
Honnêtement, je ne comprends pas pourquoi il est si compliqué pour vous de comprendre la différence entre un transistor et une résistance.
 
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