Measuring VCR PB FM impedance

The VCR i have is a JVC SR-S388E. I very recently obtained all the parts required to carry out the impedance check, to determine which resistors to use on the amp. I also very recently after ages of searching came across the service manual. Not the exact same model number but basically the same, better than nothing.

The test points for PB FM, A PB FM and DRUM FF (Head switching?) are very easily accessible. I later learnt through the service manual that DRUM FF can be used as a trigger for the oscilloscope - i only have two probes but will order another.

Reading through the amplifier guide, i am using an oscilloscope with 10K variable resistor and two probes connected to channel 1. I also bought a test tape from OddBits, it has SMPTE colour bars and 1Khz test tone.

When i ran the tape, i was getting anywhere between 150-210mV until i dialled down the resistance. I was able to get resistance value (0.5k) at the point of which just before the signal would not exceed 200mV.

Now for the audio (Hi-Fi), using A PB FM. The guide states that the audio signal should be a lot higher - up to 1000mV. I lost a bit of confidence here as my signal was coming up around 64mV.

I looked into the service manual and schematics - To even get a rough number, i could not see a resistor between the Drum IC and test point.

I found the following in the service manual for "REC FM Level" - it appears this check is for testing the recording path. However, it does state the measurement test point is carried out at A. PB FM and the spec is 90 +/- 10 mVp-p.

Is my machine an exception to this expectation of 1000mV or have i got something wrong. I set up my oscilloscope following the guide and as best to my knowledge.

Thanks in advance.

EDIT: i did find a resistor for A PB FM (2.2k)