Teac FD-55 Series, Руководство по обслуживанию

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r.
(k) Confirm that the asymmetry is within the following range.
Innermost track IF asymmetry FD-55A ^ F: 0.6ysec, M a x .
FD-55G : 0.3ysec, Max.
(L) For a double sided FDD, depress ”4" key and execute items (i) through
(k) for side 0 and side 1 heads respectively. The side is changed
alternately by a depression of "4" key. If side 1 is selected, SIDE 1
indicator of the SKA turns on.
(m) If the value in item (k) or (L) is out of the specified range, adjust
according to the following procedure. The adjustment can be done
only for the PCBA versions or the PCBA revision numbers with the
variable resistor R5 on the PCBA MFD control. No adjustment can be
done without R5.
i) Adjust the variable resistor R5 so that the asymmetry takes the
minimum value by keying in "D4H .
ii) For a double sided FDD, execute the operation in item i) for both
sides alternately by chainging the side by key .”4". The variable
resistor shall be so adjusted that both asymmetry for side 1 and
side 0 heads take the minimum value *
(n) If the values in items (K) and (L) are out of the specified range in
the PCBA without the variable resistor R5, or if t\\e adjustment in
item (m) cannot be done sufficiently even if R5 is mounted, refer
to item (j) of "General method".
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