Allen&Heath 21 Series - Manual (Page 17)

14
TAPE DECK INTERFACE
Your 21 series mixer is supplied with output levels and tape return
levels set for 0VU on meters = 4dBm. It is a very simple operation
to change operating levels to suit tape machines that require a
lower operating standard.
The output levels from the stereo and mono
outputs and also the input level to the stereo tape input can all be
independantly adjusted.
Stand the mixer on rear panel, ensuring safe and adequate support.
Remove bottom panel using POZI 2 screwdriver. The illustration
above shows the positions of the level-match adjustors. Simply
remove the adjustor link and replace the plastic plug the opposite
way round. Make sure that the plug is aligned with the pins on the
circuit board as you replace it.