Sansui AU-X410R - no bias voltage on either channel. PIC incl.

Hi guys,

a little stumped with this one. I picked the amp up for next to nothing from a local charity shop. Fired it up via my dim bulb, and it worked, but only just. The output/volume is extremely low. I measured voltage across the emitter resistors, and I'm getting 0 on all 4 of them.

I have checked the power section, and the main rails, and I'm getting around 45v per rail, so that seems ok, Output transistors appear to be ok, and measure fine.

To complicate matters, I cannot find a service manual/schematic for this amp anywhere.

Any help, pointer, tips, would be much appreciated!

Thanks!!