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UPPER PLATE
ASS~MBLY
The
upper-
plate
assembly
includes the door switch, the upper index
sensor, the cone lever assembly, the diskette eJector, the lift plate,
and
the diskette lever assembly, as well as the write protect sensor,
if applicable.
Removal
l.
Remove the control and data circuit board.
2.
Remove the chassis shield.
3.
Remove the diskette lever assembly.
4.
Remove the front pane
1.
5.
Remove the
servo
circuit board.
6.
Remove the bottom index sensor.
7.
Cut the tie wraps on the cables for the door switch,
Plug 5, the index assembly, Plug 12, and write protect,
Plug 11, if the sensor is mounted on the upper
plate assembly (Figure 6-7).
NOTE
ONE-HAL.' OF THE INDEX
ASS~MBLY
IS ON THE BOTTOM OF
THE
DRIV~.
THE INDEX ASSEMBLY SHOULD BE ROUTED THROUGH
A HOLE IN THE CHASSIS BEFORE REMOVING THE UPPER
PLATE ASSEMBLY.
8.
Remove the spring from the lift plate.
9.
Remove three Number 1 Phillips screws from the upper plate
assembly.
Two are at the front of the drive, and one is on
the drive motor side of the chassis.
CAUTION
WHEN REMOVING THE UPPER PLATE ASSEMBLY, 00 NOT BEND THE
UPPER ARM OF THE HEAD ASSEMBLY SINCE DAMAGE CAN
~~SULT.
Installation
1.
position the upper plate assembly with the lift plate under
the upper arm of the head assembly, and the mounting holes
lined up to the chassis.
6-12
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