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Fujitsu M255XK Customer Engineering Manual
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4.5 REMOVAL AND REPLACEMENT PROCEDURESThe following step-by-step procedures explain the removal and replacement ofassemblies within the disk drive.4.5.1 Head Carriage ReplacementTools Required: Phillips Screwdriver, M3Phillips Screwdriver, M2.6TweezersAlcohol and GauzeScrew Lock LiquidFigure 4-23 is an overview drawing and Figure 4-24 shows Head Cable Routing.1. Remove the cover screws and the shield cover (Figure 5-5, item 44).2. Remove the mounting screws and lift up the main circuit card assembly(Figure 5-5, item 43).3. Disconnect all cable connectors at the main circuit card and remove the card.4. Remove the head cable from its cable clamp, refer to Figure 4-25A through4-25C.5. Remove the two mounting screws and take out the Bail Assembly (Figure 5-5,item 22). Fasten the Bail Assembly with a felt pad so it does not contact theupper or lower read/write head.6. There are two fixing plates connecting the head carriage assembly and thesteel band assembly. Grasp fixing plate B (Figure 5-5, item 12) and the headcarriage (Figure 5-5, item 7) with your fingers and push to disengage the steelband from band fixing plate B7,. Detach fixing plate B and the steel band spring (Figure 5-5, item 13) fromthe head carriage and remove them at the same time.8. Remove the pulley screw (Figure 5-5, item 56) from the stepping motor,remove the band washer (Figure 5-5, item 14) and then the steel band.9. Remove the 4 mounting screws and the guide shaft clips (Figure 5-5, item 10)that are holding the two guide shafts (Figure 5-5, items 8 and 9) in place, andthen remove the guide shafts.10. Prepare the new head carriage assembly and the two new guide shafts.The guide shafts and head carriage assembly must always be replaced as asingle assembly.11. Fit the guide shafts into their grooves on the chassis, using the guide shaftclips.12. Install the head carriage assembly by reversing step 9.TS-021-013087 ••• 01 4-27 |
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