Fluke 900 - Manual (Page 82)

Maintenance FLUKE 900 SERVICE MANUAL
5. Remove the two speaker wires from their mating jacks (upper left area of top half,
component side).
6. Remove the five screws and one nut which fasten the Micro Board to the top half of
the unit and carefully lift the board out slightly. Note that the LEDs around the ZIP
socket may adhere to the keyboard decal and require gentle pressure to separate.
7. Disconnect the two keyboard connectors from the Micro Board and remove the board
completely.
8 To reinstall the Micro Board, first connect the two keyboard connectors to the new
Micro Board. Put the new board in place.
9. Follow steps 6 through 1 (reversing the instructions). Note that a grounding wire is
installed under the nut on the metal standoff. Some earlier models have selftapping
screws that fit directly into the plastic standoffs. Do not tighten these too much as the
plastic threads may be stripped. Most units have metal inserts in the standoffs and
machine screws.
5.3.2 Keyboard
1. FoUow steps 1 through 7 in Section 5.3.1.
2. Peel the keyboard away from the top cover and discard.
3. Qean the surface of the top cover if necessary such that nothing will prevent the new
keyboard from laying flat.
4. Insert the new keyboard connectors through the opening in the top cover.
5. Peel away the backing on the new keyboard and carefully place it onto the top cover
such that the LED and ZIP socket cutouts line up. The keyboard should fit into the
indented area in the top cover.
6. Apply pressure in smoothing out the keyboard in order to woik any air bubbles which
may be trapped under it.
7. Reassemble as in step 9 in Section 5.3.1.
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