Teac MT-20D-IO Maintenance Manual page 156

(k) Key in "A63F". Measure the signal level on the oscilloscope.
(1) Perform the same check as in step (h).
(m) If the result of the check mentioned in step (h) are out of the
specification, make the following adjustment.
(n) Erase again the level test tape used in the same procedure as in
step
(a).
Load the erased level test tape on MTU again.
(0) Key in "A22".
(p) Key in "A63F". Adjust R2l on the PCBA Drive Control until the
signal level becomes equal to the calibrated value of the level
test tape used.
(q) Key in "F" to stop the operation.
( r ) Key in "A2l".
(s) Key in "A63F". Adjust R17 on the PCBA Drive Control until the
signal level becomes equal to the calibrated value of the level
test tape used.
(t) Key in "F" to stop the operation.
Remark When the calibrated value of 1.0 V to 2.0 V is indicated
on the level test tape, find the calibrated value to be
used in the following method:
For example, assuming that 1.71 V is indicated on the
level test tape,
the calibrated value 250 x 1. 71/1. 5 285 mV
Namely, the calibrated value to be used is 285 mV.
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