Line 6 Spider III 75w schematic needed-Please

[steelguy]

No output. Need to signal trace.

[guitardad]

Is the power amp IC burned or cracked?What's the supply V's to the PA board?

I had one like this (amp board was ok) and it turned out to be the jack pcb. They have instrument sense line and the jack was part of that fb (mute) to the dsp.

[Jazz P Bass]

Does the headphone out work?

If so, there may be a HP jack problem as inserting a plug disconnects the main amp.

[mellowamoya]

hi
im also working on a line 6 spider 3 75w 1x12, main amp is working, input is working up to the ad,
i have found that a number of the plate through tracks are open cct i have drilled them through with an extremely fine drill put a small piece of wire through the hole and then soldered it to both traces on either side of the board. it would be very nice to get a schematic of the actual unit the HD75 is not the same as far as i can tell but does have some similarities, it looks like it is going to be a long chase of the signal.All the controls seem to be working at least all the led change and the buttons respond, just no signal output.

[Jazz P Bass]

I had one of these: No sound.
The codec was bad.
U2: AK4552.

I had a digital signal in at Left & Right In & nada coming out L & R Out.