NEC POWERMATE PRO2180 - SERVICE 1996, Руководство по обслуживанию

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Maintenance and Troubleshooting 4-3
Keyboard Cleaning
When necessary, inspect and clean the inside of the keyboard as follows:
1. Remove the six screws holding the keyboard enclosure together.
NOTE: The keyboard and cable together are
considered a whole-unit, field-replaceable
assembly. Therefore, disassembly of the key-
board is necessary only when cleaning the inside.
2. Separate the two halves of the enclosure. Clean the enclosure and keys with a
damp cloth. A small, soft-bristle brush may be used to clean between the keys. Do
not wet or dampen the keyboard's printed circuit board (PCB). If the PCB acci-
dentally gets wet, thoroughly dry it before reattaching the keyboard to the system
unit.
Mouse Cleaning
Under normal conditions, the mouse has a self-cleaning mechanism that prevents a buildup
of dust or lint around the mouse ball and tracking mechanism. Periodically, however, the
mouse ball must be cleaned. Use the following procedure to clean the mouse.
1. Unplug the mouse from the system.
2.
Turn the mouse upside down and locate the mouse ball cover (see Figure Section
4-1).
3. Turn the ball cover clockwise and remove the cover.
Figure Section 4-1 Removing the Mouse Ball Cover
4.
Turn the mouse over so that the ball and cover fall into your palm.