you could do an azmuth adjustment using a VU versus a scope and then check it with the scope.
IF my memory serves me correctly
Put on the 1k tone from your alignment tape at the speed you're going to record. Bring both output channels of the machine up on faders panned to the center of your stereo buss Set the output to read 0 VU. Throw one channel out of phase. (If your console doesn't have a phase button on each channel strip, it should!) The output should now be almost nothing. Test it by putting the channel back in phase.... should be back to 0 VU. This is good.
If your console doesn't have a reverse-phase button, you'll need to make a special out-of-phase cable to put in the signal path of the output of one track... doesn't matter what track. If you have a phase reverse button, check the output of that fader to be sure the gain of the left channel is the same as the output of the right channel. Sometimes a phase reverse button causes a gain loss.
Playback rough azimuth adjustment: Now play the 1k tone off the playback head, looking at the buss output. If you set the in-phase output to 0 vu, there should now be an output of... oh... minus 10 to minus 20 or less.
Carefully, get a non-magnitized screw driver (probably phillips or maybe hex wrench) and slowly turn the azimuth screw. . You should see the output of your buss meter change. It should go up, again, assuming you've' got one channel out of phase on the board.
Turn the screw until you see the buss output go as low as it will go. Look carefully. Don't do this by candle light. Rechecking is a good idea.
Playback fine azimuth adjustment: Now play the 10k tone and do the same thing, only slower. It may not go down as far as the 1k tone did, since often the 10k region isn't as stable as the 1k. It's smaller frequencies up there.... NOTE: This is called a negative peak, and there will be one major negative peak, and a couple minor negative peaks if you turn the screw a lot in one direction or another. This is when you tilt the head so far off, one channel is reading the next whole sine wave instead of the same one in line with the other track. Be sure you're adjusting the major negative peak which always dips the lowest on the buss.
Go back to 1k (in playback) and check to see that the 1k tone is still way low on the buss meter. If you need to do this a couple times to see these negative peaks, go for it. In time it will become second nature. Come back to the 10k tone and recheck to be sure it's showing the lowest possible buss output.
Record rough azimuth adjustment : Now put on some blank tapepreferably the kind that you'll be using for the session. On your record pad or some piece of tape FAR away from any recorded music, send a 1k tone from your oscillator or tone generator to your machine. Record 1k onto the tape. The console and machine should be set up the same way. You should still be in playback - you're seeing your setting via the playback head's output. Turn the comparable screw on the record head and adjust the record azimuth to give you the lowest negative peak reading.
Record fine azimuth adjustment: When it's set to that lowest point, turn your oscillator to 10k, roll back the tape and adjust the fine azimuth setting. Same stuff as above - record 10k to tape, and still reading playback, find the lowest negative peak.