CORHECTrVE MAINTENANCE
7-49
NOTE: The gasket between the two Optica! H3-232-C Interface LEDs on the digitaJAl PCB and
front cover must remain with the LEDs. The top cover lifts away easily. Do not damage the
gasket A correctly fitted gasket assures the sealing of (he ScopeMeter.
6. Lift the keypad from the top cover (item
2).
7. Remstail the new top cover (item
1
),
7. 2. 5.6 Keypad replacement
1
. Remove th e botto m cove r asse mbiy.
2. Remove the 30>pole flat cable.
3 . Disassembie the top cover assembly.
4. Lift the keypad from the top cover (item
2).
5. Reinstall the now keypad.
7.2.5 9 Liquid crystal display (LCD), contact strips and backlight foil (Model 97 only) replacement.
Referring to figure 7.15, use the following procedure for LCD replacem^t.
1 . Remove the bottom cover assembly.
2. Remove the 30-pole flat cable.
3. Disasserrble the
top cover assembly.
NOTE:
Oifs
or dirt from the hands are ennemies of the LCD contact strips used in the LCD assembly.
Whenever handling these strips, it is advisedthat tweezers be used so as not to contaminate
them. Care should also be taken when handling the front panel lens or LCD glass. Dirt or
fingerprints
on these parts
will
be visible to the user and may impair the readabUhy of the
display
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