GAS Thoebe Preamp schematics

[wakaz]

Hi,
I have a GAS Thoebe Preamp that needs repair on both phono outputs, as they suddenly stopped working. As my local repair shop is working to fixing this, we came across on a couple of more issues and we are in need of the following board schematics.

• gas-528c
• gas-333f
• gas522c

After some internet search I found a couple sches but non of the above. If someone can point me to a link or share with me the sches ill be grateful! I am very eager to repair this pre-amp, not only cos it's a great module but also due to its sentimental value.

Thanks in advance!