hifi engine

Yaqin MC-10B

Hi All,
I'm new here. Just bought myself an old Yaqin MC-10B with a valve complement of 4 x KT88s, 4 x 6N1-P, 2 x ECF82.

The amp has a few issues, burnt out 10 Ohm cathode resistor, burnt out 330 Ohm grid resistors, one failed KT88, split insulation on the smoothing caps.

I can't find any info on this model at all and I'm guessing it was an interim model between the MC-10Ls and the MC-100B as it seems to share parts and design from both.

Does anyone know anything about this amp or more importantly, have a circuit diagram.