Took in an ailing 2275 recently, the FM tuner is nothing but static across the whole dial, no meter deflection. AM tuner works fine, but doesn't drive the signal strength meter. I've started tracking things down in hopes of fixing it. First thing, I only have 10.2V from the power supply where I should have 13.4. The board is mostly rebuilt, I figure I should take a look at the diodes here. With that in mind, here's the info from the tuner boards. The front end seems to be OK, I was able to sniff out the 10.7MHz from the front end fed to J201 of the IF board using my scope. Not sure how strong this signal should be, but it's there. H201, 202, 203, and 209 on the IF board are all reading 0 on all legs. H204 thru 208 and H210 all seem to have reasonably close voltages to the schematic, considering the weak power supply feed. It's obvious to me why the tuner doesn't work, H201 - 203 killed the IF, but why are they dead when other transistors in the IF stage are fine?