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INDEX OF SERVICE CHECKS, ADJUSTMENTS AND REMOVALS (Continued)
Service
Component
Checks
Interlock Handle
Plenum Air Filter
Figure
3-1
Section
4. 3. 1
Plenum Cover
Read/Write Heads
Figure
3-1
Section
4.16.1
Sector Transducer
Spindle Assembly
Figure
3-1
Tachometer Assembly
Tachometer Extension
Rod
4.1
DRIVE MOTOR AND DRIVE BELT
4.1.1
Drive Belt Removal and Replacement
Removal!
Cleaning
Adjustment
Replacement
Section
4. 19. 1
Section
4. 19. 1
Section
4.3.2
Section
4.3. 2
Figure
3-1
Section
4.17.
1
Section
4. 17.2
Section
3.2.1
Section
4.20.1
Section
4.20.2
Section
4.1. 3
Section
4. 12. 3
Section
4. 12. 2
Section
4.12.1
WARNING: A close fit exists between the spindle
housing and base plate. Do not pry the spindle off of
the base-plate since the accurate location of the
spindle can be destroyed if this is done.
1.
Loosen three hex-head mounting screws securing
motor mounting plate to base plate.
4.
Replace spindle assembly by reversing Steps 1,
2, and 3.
2.
Push drive motor mounting plate horizontally
until drive belt slips off the pulleys.
3.
Replace drive belt by reversing Steps 1 and 2.
4.
Adjust the drive belt tension by following pro-
cedures of Section
3.2.3.
4. 1. 2 Drive Motor Removal and Replacement
1.
Disconnect leads from terminal strip in ac
power box.
2.
Remove drive belt. See Section
4.1.1.
3.
Remove four socket-head screws securing drive
motor to motor mounting plate and remove drive
motor.
4.
Replace drive motor by reversing steps 1, 2,
and
3.
Adjust drive belt tension, Section
3.2.3.
4.
1.
3 Spindle Assembly Removal and Replacement
1.
Remove drive belt. See Section
4.1.1.
2.
Remove three socket-head mounting screws
securing spindle housing to base plate
(Figure
4-1).
Access to mounting screws is
provided through two holes
(180°
apart) located
in bottom of outer pole piece of magnetic chuck
assembly.
3.
Lift the spindle vertically out of its locating
bore.
4.2
WARNING: Tighten the three mounting screws
evenly or spindle alignment will be destroyed.
5.
Adjust head-arm assemblies by alignment with
track
100
on CE disk cartridge. See Section
4.17.1.
4.2
CARTRIDGE ASSEMBLY
4.2.1
9!lrtridge Service Check
Scratches on heads and/or disk data surface are
related as described in Section 3.3. The following
symptoms should be investigated to determine the
cause of read/write problems:
1.
Check for scratches on disk surfaces. See sec-
tion
3.3.4
and Figure
3-4.
2.
Check for a series of scratches or grooves across
head. See section
3.3.4
and Figure
3-4.
3.
Check for oxide deposited on heads. See
Section
3.3.4
and Figure
3-4.
4.
Check for audible tinging resulting from head and
disk interference. See Section
3.3.4.
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Troubleshooting
