May 2014
Intermediate to advanced
320 pages
13h 41m
English
Content preview from Servicing Personal Computers, 3rd Edition
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184
li
ù
Figure 4.43. Motor drive and speed control circuitry of the FD-50 drive. (The speed control
potentiometer,
VR1,
can be seen in the upper right-hand corner)
Figure 4.44. Typical interior view of
a
modern double-sided half-height
drive.
(The head connecting
cable can be clearly seen)
Tape and disk drives 185
Measurement of the drive motor speed should always be made when disk-based equipment
is being serviced since this too can be instrumental in avoiding future problems. Adjustment is
invariably provided by means of a small preset potentiomete ...