Help finding schematic of Korean amplifier Seoum SA-4130 (Tanol/Straut KA-4130)

[samnmax]

Hi,
I'm looking for the schematic of a Korean amplifier from the late 70's/early 80's. It was sold in Spain as Tanol KA-4130, but originally it's a Seoum SA-4130.
Also sold as Straut KA-4130, Siemens RV-630.

Some general info I found:
http://www.hifi-archiv.info/Voelkner/1983-84/8384_0275.jpeg
http://tsf-schoser.e-monsite.com/pages/restaurations-mai-2013/amplificateur-stereo-sa-4130-seoum.html

It seems there's also a 4130B which is a slimmer version with a different circuit.
This one is a discrete transistor amplifier with a pair of D586+D616 per channel.

I managed to burn some components when the voltmeter probe slipped. I changed R129 and some shorted transistors, (I know, the ebay ones may be counterfeit).
Now it seems it only amplifies the top part of the sine wave, and only when I turn on the source, afterwards the output wave diminishes a bit. Both channels behave similarly. I'm reverse engineering the schematic, but it's a bit complicated.

Thank you!

[pmh_9@hotmail.com]

Hello! i have this same amp. Produces distortion at low volume but not at high volume.
With headphones it sounds great but as soon as you connect an 8 ohm load, it distorts in the channel where it is, including headphones.
I changed the four main transistors and nothing ... they usually get 0.4V instead of 0.7V that they should be, so the problem will be with the power supply. I have also changed almost all the capacitors and it remains the same ...
Any clues ??, does anyone have the service manual ??
I'm going crazy without him ...
Thanks!!