Teac FD-55 Series - 260

condition), +5V is applied. Fig.2l6 shows a typical waveform of the head
load solenoid current.
At start of the head loading, it is required in order to assure the
head position against the shock of the solenoid motion that +l2V is
applied to the stepping motor as weIl as item (ß).
+l2V current
+5V current
+l2V applie<i
~ __ ~~peak at start (300mA,Max.)
O~-~~--+j-- ~verage at start
I
-,r-----Peak at start (245mA,Max.)
~---- __ ~II. __ ~ ____ ~-----Average after
o _i--_~J ~ start
I i
I +5V aoplied I
• ' • • i
26ms,Nom.,35ms,Max.
i
~ Head unload
Head load starts
I
(Fi.g.216) A typfcal waveform of head load solenoid current
(lO) "Waiting" means that all the input interface signals are ..FALSE (HIGH
level) .
Lll) "Write operation" means the period when the w""RITE GATE input signal is
TRUE.
e12) For a CSS model, the item of "Head load solenoid" is not applied.
As far as the disk is installed, head load condition continues and the
spindle motor current during head unload is not applied.
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