Help an Idiot not Destroy a Yamaha CR 2040

[avionic]

There may be a service bulletin on the CR-2040 as well.

Not aware of any..

 

[avionic]

Yamaha wired the lamps in series pairs, so if one goes out, so will its pair. So, all the lamps are most not likely bad, but should be replaced.

Yep wired series-parallel. Burn't out lamps will also cause power down popping in the speakers.

 

[Dingman]

Copy that. I'll look at the service manual and see if it seems scary; if so I'll just pretend I don't know anything about it.

Is there some really basic test I can do to see if things are COMPLETELY whacked?

Yeah I just looked at the service manual I'm not messing with that. Dummy loads, etc. Over my head. Plus it can kill me.

This should be entered into "Post of the Year" contest. If only more people had this clarity of ignorance.