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SIo:CTION 5
MAINTENANCE CHIo:CKS AND ADJUSTMENTS
INTRODUCTION
This section is for the use of the OEM Repair and Service Departments.
It
contains
the
maintenance
checks and adjustments used during the
normal
life of the drive.
The purpose of this section is to
outline
the
steps
necessary
to
verify
the
operation
of the drive during
troubleshooting, or after replacing a part or assembly.
If
a
fault
is
adjustments
in
area.
However,
preceding checks
suspected
with
a
drive,
following the checks and
the
order presented will help to isolate the problem
if
a specific check and adjustment is required,
the
do not necessarily need to be performed.
The
values
and
tolerances
stated in the checks and adjustments are
typical values for working drives.
If the values
measured are within
tolerances
or
close
to
the limits, the suspected fault is normally
caused by some other problem.
Completing other checks and adjustments
may disclose the actual problem.
Refer
to the schematics in the appendices and the
in
Section
4
for
circuit
descriptions.
Test
illustrated in Figure 5-1.
5.1
VISUAL INSPECTION
theory of operation
point
location is
Before
applying
power
to
the
drive,
adjustments, visually inspect the drive:
or
doing
any
checks
or
1.
Check for loose or missing hardware.
2.
Ensure the front latch opens and closes.
when the door is opened.
The head arm raises
3.
Ensure the front panel is secure.
4.
Manually rotate the drive hub.
It should rotate freely.
5.
Ensure the circuit boards are secure.
6.
Ensure the connectors are firmly seated, and
installed correctly.
7.
Check for damaged or missing components on the circuit boards.
8.
Ensure that a diskette can be inserted and removed easily.
5-1
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