NEC PowerMate ML5 Disassembly Manual
Table of contents Overview.................................................................................................................................................................3 Technician Notes....................................................................................................................................................3 Disassembly Instructions.....................................................................................................................................
Overview This document contains step-by-step disassembly instructions for the PowerMate ML5 chassis. The instructions are illustrated where necessary with images of the part that is being removed or disassembled. Furthermore, the screws that are removed are shown next to the image of the parts themselves. NEC reserves the right to make changes to the PowerMate ML5 chassis without notice. Technician Notes Only technicians authorized by NEC Computers International BV should attempt to repair this equipment.
Hazardous Voltage There is hazardous voltage present inside the computer when it is connected to an AC supply, even when the computer’s power switch is off. Exposure to hazardous voltage could cause personal injury. To avoid risk of injury, contact an Authorized Service Provider for proper (un)installation of optional hardware devices. Avoid Electrostatic Discharge Electrostatic electricity can easily damage circuit cards and integrated circuits (ICs).
Removing the Stabilisers To remove the stabilisers follow the next steps: 1. Place the computer body with the bottom side protruding a little away from the edge of a table. 2. Free the locks C and slice the stabilisers as indicated by the arrows A and B, towards the front of the system for stabiliser A and towards the rear for stabiliser B,. Fig. 1: Removing the stabilisers Opening the Chassis To open the chassis, first remove the stabilisers (see Removing the Stabilisers), then follow the next steps: 1.
Fig. 3: Removing the cover of the chassis Note: To prevent damaging the system, make sure no cables or other devices protrude from the chassis before replacing the cover. Removing the Riser Board Bracket and the Raiser Board To remove the riser board bracket first remove the stabilisers (see Removing the Stabilisers), open the chassis (see Opening the Chassis), then follow the next steps: 1. After removing the cover, put the chassis in the horizontal position, rear side towards you. 2.
X1 Fig. 5: Removing the riser board Removing a PCI or CNR Expansion Card To remove a PCI or CNR expansion card, first remove the stabilisers (see Removing the Stabilisers), open the chassis (see Opening the Chassis), remove the riser board bracket (see Removing the Riser Board Bracket and the Riser Board), then follow the next steps: 1. Remove the screw holding the PCI or CNR expansion card in place. 2. Extract the PCI or CNR expansion card from its slot and put it aside.
3. Carefully extract the AGP expansion card from its slot and put it aside. Removing the Floppy Disk Drive To remove the floppy disk drive, first remove the stabilisers (see Removing the Stabilisers), open the chassis (see Opening the Chassis), then follow the next steps: 1. Remove the one screw securing the floppy disk drive bracket to the chassis. X1 Fig. 7: Removing floppy disk drive screw 2.
Note: When reassembling the floppy disk drive, slide the floppy disk drive bracket in the chassis, taking care that the tabs (A, B, C, D) of the bracket fit perfectly in the corresponding holes of the chassis. 4. Remove the two screws securing the floppy disk drive to the bracket. X2 Fig. 10: Screws securing the floppy disk drive to the bracket 5. Take the floppy disk drive out of the bracket and put it aside.
X2 Fig. 12: Removing the converter board 4. Remove the two screws securing the optical device drive to its bracket and put it aside. X2 Fig. 13: Removing the optical device drive from its bracket Removing the Hard Disk Drive To remove the hard disk drive, first remove the stabilisers (see Removing the Stabilisers), open the chassis (see Opening the Chassis), then follow the next steps: Note: The chassis has two bays for hard disk drives.
Fig. 14: Extracting hard disk drive assembly 4. Remove the four screws (two on each side) fixing the hard disk drive to the bracket, slide the hard disk drive out of the bracket and put it aside. X2 Fig. 15: Freeing the hard disk drive from the bracket Removing the Power Supply Unit To remove the power supply unit, first remove the stabilisers (see Removing the Stabilisers), open the chassis (see Opening the Chassis), then follow the next steps: 1.
1. Disconnect the auxiliary fan connector from the motherboard. 2. Remove the screws shown in the picture below. Take the auxiliary system fan out of the chassis and put it aside. X2 Fig. 17: Removing the auxiliary system fan Removing the CPU To remove the CPU, first remove the stabilisers (see Removing the Stabilisers), open the chassis (see Opening the Chassis), remove the floppy disk drive (see Removing the Floppy Disk Drive), then follow the next steps: 1.
X2 Fig. 19: Removing the second serial port 3. Take the second serial port out of the chassis and put it aside. Removing the Switch/LED board To remove the Switch/LED board, first remove the stabilisers (see Removing the Stabilisers), open the chassis (see Opening the Chassis), then follow the next steps: 1. Disconnect the cable from the Switch/LED board. 2. Remove one screw. 3. Carefully remove the Switch/LED board from the chassis and put it aside. X1 Fig.
X2 Fig. 21: Removing the internal speaker 2. Take the speaker off the chassis and put it aside.
Notice The information in this guide is subject to change without notice. This guide contains information protected by copyright. No part of this guide may be photocopied or reproduced in any form or by any means without prior written consent from NEC Computers International BV. NEC COMPUTERS INTERNATIONAL BV SHALL NOT BE LIABLE FOR TECHNICAL OR EDITORIAL ERRORS OR OMISSIONS CONTAINED HEREIN; NOR FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM THE FURNISHING, PERFORMANCE, OR USE OF THIS MATERIAL.
