Marshall 9005 stereo power amp issues.

[Captain chunkulus]

So,  I picked up this 9005 stereo power amp. I need it had issues however I figured an output tranny or tube or something. Thus far I've  that it seems to have an after market power tranny. There is only 1 stand by switch wired. It. Looks like they wired the standbys to just one switch. Just trying to figure out the lay of the land how to put this back as a true stereo 50 watt aside power amp.

[Captain chunkulus]

More pics.

[sluckey]

My first step would be to find a schematic.

[Captain chunkulus]

Here it is.

[sluckey]

I see the problem. You're missing an entire channel!   

[Captain chunkulus]

Lol. 

[Captain chunkulus]

Got it sorted out.  Bad output transformer on the right side.