Hi Ed, I don't think I am very far ahead of you in skill, but I think I can offer you some starting advice.
Worked before he shipped it, huh? Well if you say so...
The only things I can think of that would be affected by a simple shipment, or things that can be temperamental, are wire connectors, jacks, and pots. From the diagram, it looks like those input jacks have a lot of switch going on. I would try some continuity tests or resistance checks through a guitar cable - e.g. one probe on the tip of the free end of the cable, the other to the jack's output pin (#2) - and also through the closed contacts on the input you're not using.
From where you are now, #1 question would be, Is it even the right fuse? Hopefully there's a label on the board or chassis, make sure you get correct replacements, and buy a few.
The bottom left of the diagram seems to show the power supply circuit, it has some test points with values marked "VDC". After you get a new fuse, you can check the supply. Connect multimeter ground to chassis and check the DC voltage at these points to see if your supply is.. supplying the proper voltages.
If those look ok, you can try to isolate the problem to preamp or power amp.
Connect the ipod to one input, then run a cord from the PREAMP OUT over to the POWER AMP IN on your Yamaha amplifier. Power them on and see if the preamp in the Fender is passing the signal. I think this is similar to what you did already? Did you use a 'preamp out' signal from your Yamaha into the "POWER AMP IN" on the Fender when you did that? One thing I've learned, jacks and pots are the most suspicious things on a used amp. Wiggle everything to try to make sure it isn't a scratchy pot not letting the signal through, or a stubborn jack.
If you don't get anything through the preamp, you can check the voltages at the supply pins on the ICs in the preamp path; if those look good, you can set up an audio probe and see if you can follow the signal through the circuit to find how far it gets.
That's probably long enough for starters, and will get some more information for others to consider. Get the right fuse; check proper connectivity on all of the pins on the input jacks before trying the amp again.
Hope this helps!
Worked before he shipped it, huh? Well if you say so...
The only things I can think of that would be affected by a simple shipment, or things that can be temperamental, are wire connectors, jacks, and pots. From the diagram, it looks like those input jacks have a lot of switch going on. I would try some continuity tests or resistance checks through a guitar cable - e.g. one probe on the tip of the free end of the cable, the other to the jack's output pin (#2) - and also through the closed contacts on the input you're not using.
From where you are now, #1 question would be, Is it even the right fuse? Hopefully there's a label on the board or chassis, make sure you get correct replacements, and buy a few.
The bottom left of the diagram seems to show the power supply circuit, it has some test points with values marked "VDC". After you get a new fuse, you can check the supply. Connect multimeter ground to chassis and check the DC voltage at these points to see if your supply is.. supplying the proper voltages.
If those look ok, you can try to isolate the problem to preamp or power amp.
Connect the ipod to one input, then run a cord from the PREAMP OUT over to the POWER AMP IN on your Yamaha amplifier. Power them on and see if the preamp in the Fender is passing the signal. I think this is similar to what you did already? Did you use a 'preamp out' signal from your Yamaha into the "POWER AMP IN" on the Fender when you did that? One thing I've learned, jacks and pots are the most suspicious things on a used amp. Wiggle everything to try to make sure it isn't a scratchy pot not letting the signal through, or a stubborn jack.
If you don't get anything through the preamp, you can check the voltages at the supply pins on the ICs in the preamp path; if those look good, you can set up an audio probe and see if you can follow the signal through the circuit to find how far it gets.
That's probably long enough for starters, and will get some more information for others to consider. Get the right fuse; check proper connectivity on all of the pins on the input jacks before trying the amp again.
Hope this helps!