Test Signal Help

[K Man]

 Looking for some advice concerning injecting a test signal into a fender Princeton Chorus amp.  I have some modest experience troubleshooting electronics but this is my first go at a guitar amp.  The factory schematic calls for a 1 kHZ input signal in order to achieve the signal values listed at the various test points on the schematic.  However the schematic makes no mention of a voltage requirement for the 1 kHZ test signal.  The first test point in the signal flow is "TP9", a tie point right after input jack #1.  The signal value listed is 2 mVAC.  Should this be the value of my 1 kHZ test signal?  My next question is a bit of a newbie no-brainer but I want to be sure...to inject the signal do I just take an old guitar cord jack plug and attach a couple of leads to hook it up to the sig gen and amp?
Attached is a cut of the input for the amp.  Thanks in advance!

[J M Fahey]

Yes, you got it right.
Get a guitar cord, hook one end to the generator, set it to 1kHz, 2mV, and plug it into the upper (in the schematic) input jack.

[Enzo]

Look at your test point, it is the input jack.   Showing the 2mv signal at the input jack is the same thjing as specifying a 2mv input.

Be aware all those signal voltages are appoximate.  DOn;t waste time trying to "correct" a 34mv signal point that is supposed to be 38mv.

[K Man]

Thanks for the help especially about the not precise signal measurements.  I figured there would be some voltage differences given component value drift over the years but it's good the hear it from an outside observer.  Definite cure for potential troubleshooting headaches!