Ampeg SVT-RT

[RAJPE]

Working on a 2011 (on circuit board) Ampeg SVT-RT amp with no sound output. I have worked on older models of the SVT amps but this one is new to me and the wiring diagrams I have found don't seem to help. The signal makes it to the first preamp tube but stops there. I found that the 315 VDC was not present on the plate and assume that is the problem. The wiring diagrams do not show the power supply section so that I can trace the problem. Where can I find the wiring diagram or do you have suggestions.

Thanks

[Hangman]

There should be a plate resistor there, is there a voltage on the other side
Of that resistor? May just be a bad plate resistor.

[RAJPE]

There should be a plate resistor there, is there a voltage on the other side
Of that resistor? May just be a bad plate resistor.

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I followed the circuit to the main board and found that it was not providing 480 VDC to the preamp. I removed the board from the cabinet and found that F3 1.6 Amp @ 250 volt was blown. Real convenient place for a fuse, under the board. Anyway I can replace it but was unable to find the fuse on the schematic to determine potential reasons it failed. Do you know where to find the schematic or potential loads on this fuse?