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Fujitsu M255XK Customer Engineering Manual page 65

5 1/4" mini-flexible disk drive
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4.5.4 Collet Assembly Replacement
Tools Required:
Phillips Screwdriver, M3
Tweezers
Screw Lock Liquid
Refer to Figure 5-5.
1.
Remove the shield cover assembly (item 44).
2.
Remove the two screws fastening the collet shaft plate assembly (item 30).
3.
Remove the E-ring (item 517) on the collet actuating plate (item 29) and
remove the collet actuating plate with its washer and pressure spring.
4.
Install a new collet assembly, washer and pressure spring by reversing the
removal procedures given in steps 2 and 3.
5.
Adjust the position of the center of the collet assembly using the procedure
described in paragraph 4.4.1 and tighten the mounting screws to the specified
torque.
6.
Inspect and adjust track alignment (paragraph 4.4.10).
7.
Install the shield cover assembly.
4.5.5 Sensor Block Replacement
Tools Required:
Phillips Screwdriver, M3
Tweezers
Screw Lock Liquid
Refer to Figure 5-5.
1.
Remove the shield cover (item 44).
2.
Remove the mounting screws from the main circuit card and lift up the
circuit card (item 43), unplug all connectors at the main circuit card assembly
and remove the card.
3.
Remove the screws holding the main circuit card shield plate and remove the
plate (item 23).
4.
Remove the two screw holding the sensor block to the chassis and remove the
sensor block (item 15).
5.
Install a new sensor block by reversing the removal procedure.
6.
Adjust the Track 00 sensor (paragraph 4.4.11).
7.
Inspect and adjust track alignment (paragraph 4.4.10).
TS-021-013087 ••• 01
4-33

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