Teac MT-20D-IO Maintenance Manual page 164

4-3-20 Check of asymmetry
(1) Articles to be used
(a) Work tape
(b)
SOA
(c) DC power supply (+12 V, +5 V)
(2) Check procedure
(a) Connect SOA in accordance with Item 4-2-5, and set the POHER
switch to the PSA side (it is not required to connect a check
cable C).
(b) Load the work tape on MTU.
Cc) Key in "C7F".
Cd) The asymmetry value is indicated to the display DATA 1 on SOA.
(e) Check if the asymmetry is less than 5
%.
(f)
Key in "A21". The write/read track on MTU is changed over to
Track 1.
(g) Perform the same check as in steps (c) to (e).
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