yamaha ca 1000 schematic wanted

Tomac · 3rd February 2007, 05:07 PM

Good people, help me please.
If someone has schematic of this amplifier, I would be extremely happy if he/she could post it here, or mail it to me. I managed to get a schematic of Ca-1010, but they are not really the same and I need a schematic so I could repair it. Even Yamaha Europe said they don't own schematic for this amplifier so if there is a good soul with a schematic...
thanks in advance

forr · 3rd February 2007, 05:26 PM

Hi Tomac,
I have the schematics you are looking for, send me an email.

forr · 3rd February 2007, 05:27 PM

O sorry, my schematics is CA1010.

forr · 4th February 2007, 01:57 PM

Could Yamaha 810 schematics help ?

Tomac · 4th February 2007, 02:25 PM

Don't know, it is probably more simmilar to 1010 than to 1000 as it is model from them 1010 series. Thanks for the effort anyway.

triode_al · 30th March 2012, 01:11 PM

Quote:

Originally Posted by Tomac

Good people, help me please.
If someone has schematic of this amplifier, I would be extremely happy if he/she could post it here, or mail it to me. I managed to get a schematic of Ca-1010, but they are not really the same and I need a schematic so I could repair it. Even Yamaha Europe said they don't own schematic for this amplifier so if there is a good soul with a schematic...
thanks in advance

Still need it?
I have parts of it but I miss the power supply board schema.

kjcolt · 30th March 2012, 06:23 PM

try schematics unlimited
meaby you can find your luke there
gr

Antoinel · 30th March 2012, 07:14 PM

Try also www.stereomanuals.com . Specify the make, model and your need for a service manual. The agent's name is Rick; accepts paypal.

zeonrider · 30th March 2012, 07:23 PM

Is it that one?

Regards zeoN_Rider

triode_al · 31st March 2012, 07:48 AM

Thanks,
I have already found the CA-800 service manual. It is for the most like the CA-1000, just that the output is beefier (it uses 2SC1079 in output) and the CA1000 also has that very nice MC board - - - you might be able to plug in a I/V output of a current output (PCM58 . . ??).
The power supply board is the same.

The power supply board regulates 45V AC to +50V and -50V DC. The capacitors for the plus were completely gone (one in the first filter section fell apart as I took it out, and the second was dead too! [My sister always left the amp on ...]
Replaced the caps with Philips 63/220 muF and the amp works good again. Ripple extremely low - predominantly zener noise.

I ran it on the scope: high frequency roll off above 150 KHz, with a low shelving (it does not decrease fast; there are obviously several local compensations that work well).

Why only one half of the power supply was fried?
The power supply for the pre-amp stages (+50V) all go through the same filter bank as the +50V and -50V for the driver stages of the power amp. The preamps have one power supply: each stage has a capacitor on the input!.
-->> What I should do: make a second filter line for the preamp output of +50V.

I listened to it yesterday, using the pre-amp out (decoupled the power amp) with my F5 as amplifier.
I must say the sound is relaxed, the Loudness works well (sweet!). Sounds of singers are well staged, natural. But there is some veiling, in depth.
Easier, a more natural and relaxed sound than the Aikido, but lacking the direct attack of my standard tube stage [that tends to be a bit fatiguing at times]. . . but that is a different story.

3rd February 2007, 05:07 PM	#1
Tomac diyAudio Member Join Date: Dec 2003 Location: Zagreb	yamaha ca 1000 schematic wanted Good people, help me please. If someone has schematic of this amplifier, I would be extremely happy if he/she could post it here, or mail it to me. I managed to get a schematic of Ca-1010, but they are not really the same and I need a schematic so I could repair it. Even Yamaha Europe said they don't own schematic for this amplifier so if there is a good soul with a schematic... thanks in advance

31st March 2012, 07:48 AM	#10
triode_al diyAudio Member Join Date: May 2004 Location: Westland Blog Entries: 1	Thanks, I have already found the CA-800 service manual. It is for the most like the CA-1000, just that the output is beefier (it uses 2SC1079 in output) and the CA1000 also has that very nice MC board - - - you might be able to plug in a I/V output of a current output (PCM58 . . ??). The power supply board is the same. The power supply board regulates 45V AC to +50V and -50V DC. The capacitors for the plus were completely gone (one in the first filter section fell apart as I took it out, and the second was dead too! [My sister always left the amp on ...] Replaced the caps with Philips 63/220 muF and the amp works good again. Ripple extremely low - predominantly zener noise. I ran it on the scope: high frequency roll off above 150 KHz, with a low shelving (it does not decrease fast; there are obviously several local compensations that work well). Why only one half of the power supply was fried? The power supply for the pre-amp stages (+50V) all go through the same filter bank as the +50V and -50V for the driver stages of the power amp. The preamps have one power supply: each stage has a capacitor on the input!. -->> What I should do: make a second filter line for the preamp output of +50V. I listened to it yesterday, using the pre-amp out (decoupled the power amp) with my F5 as amplifier. I must say the sound is relaxed, the Loudness works well (sweet!). Sounds of singers are well staged, natural. But there is some veiling, in depth. Easier, a more natural and relaxed sound than the Aikido, but lacking the direct attack of my standard tube stage [that tends to be a bit fatiguing at times]. . . but that is a different story. __________________ See my 2SK175/2SJ55 F5.. CS8412/SAA7220/TDA1541 ; SP-6 Light ; MC30 Super--> two stage RIAA 2SK240-ECC88/6SL7.

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3rd February 2007, 05:26 PM	#2
forr diyAudio Member Join Date: Dec 2004 Location: Next door	Hi Tomac, I have the schematics you are looking for, send me an email.

3rd February 2007, 05:27 PM	#3
forr diyAudio Member Join Date: Dec 2004 Location: Next door	O sorry, my schematics is CA1010.

4th February 2007, 01:57 PM	#4
forr diyAudio Member Join Date: Dec 2004 Location: Next door	Could Yamaha 810 schematics help ?

4th February 2007, 02:25 PM	#5
Tomac diyAudio Member Join Date: Dec 2003 Location: Zagreb	Don't know, it is probably more simmilar to 1010 than to 1000 as it is model from them 1010 series. Thanks for the effort anyway.

30th March 2012, 06:23 PM	#7
kjcolt diyAudio Member Join Date: Nov 2011	try schematics unlimited meaby you can find your luke there gr

30th March 2012, 07:14 PM	#8
Antoinel diyAudio Member Join Date: Jan 2012 Location: Pennsylvania	Try also www.stereomanuals.com . Specify the make, model and your need for a service manual. The agent's name is Rick; accepts paypal.

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