Tandy 1000 Technical Reference Manual page 379

Tandy 1000 Technical Reference Manual
(f) Execute item (d) and (e) with a slight depression (very slight
depression easy to release: 10
~
20g) by a finger on the top of the
upper head (double sided) or of the pad arm (single sided), and
measure the average read level as in item (e).
(g) Confirm that the read level measured in item (e) is greater than BO\
of that in item (f).
(h) For a double sided FDD, execute items (d) through (g) respectively
for the side 0 and the side 1 heads.
(i) After making the head move to track 00, execute items (d) through (h).
(j) Head touch adjustment for a single sided FDD:
i) At the innermost track, turn the groove on the upper side of the
head pad by 30° steps, approx. with a common screwdriver (see
Fig.420). At each turning of the groove, execute write and read
operations in item (d).
Be sure to take apart the common screwdriver from the head pad
during write or read operation.
Note: Be careful not to push the head pad strongly with the common
screwdriver. Also do not touch the pad surface to which a
disk will be in contact.
ii) After turning the pad position around 360°, set the position again
to the position where the highest read level was obtained. Then
execute items (d) through (g) at the innermost track.
iii) Continue the operation until the items (g) and (i) are sufficiently
satisfied. Following causes are assumed for the insufficient
result in item (g) or (i) after fine adjustment of the pad
position.
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