Teac FD-55 Series, Руководство по обслуживанию

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(k) Select side 1 head by key t,4” . (SIDE 1 indicator turns on).
(L) Execute drive select by key *‘0M . (DSO indicator turns on).
(m) Key in *'C9,\ (HEAD LOAD TIME)
(n) Observe the waveform of the DIF terminal at head unloading using the
oscilloscope*. ; . , _ ^
SKA DOUT
SKA DIF
Head unload command
(Fig.419) Read waveform at head unloading
(o) Confirm that there is no big spike noise (excludes a small one) or
there is not a continuous unload level (excludes the noise level) as
shown by dotted line in Fig.419.
In such event that either of the spike noise or continuous unload level
is observed in the waveform, fine adjust the set screw of the arm
lifter.
Note: This item should be executed when the side 1 head is selected
(SIDE 1 indicator turns on).
If the side 1 head is lifted too high during unload operation,
,spike noise will be observed, while unload level will be observed
when it is too low.
(p) Confirm that the DATA indicator L L 1 J.
J
(%) of the SKA indicates a
value within the following range.
Head load settling level after 35msec: 70%, Min.
4055