Anritsu Spectrum Master MS2721A Maintenance Manual page 38

NOTE: The speaker is held in place by four locating pins on the inside of the keypad bezel. When the
keypad bezel is removed, the speaker is held only by the fragile connecting wires. Use care not to
damage the speaker wires when removing or replacing the keypad membrane or PCB.
4. Disconnect the function key flexible switchpad from
connector to release the flexible switchpad.
J2
Figure 19. Keypad PCB
5. Remove the keypad PCB, taking care not to damage the speaker wires.
6. Reverse the above steps to install the replacement assembly, with the following cautions:
· Carefully close the locking tab on connector
"snap" into position when fully closed.
· Insert the membrane over the kepad PCB, and under the speaker. Take care to properly orient the membrane so
that the rubber pins are aligned with the keypad switches on the PCB.
· The speaker is held in place by four locating pins on the inside of the keypad bezel. Be sure that the four locating
pins are properly seated into the four corner holes of the speaker when reinstalling the bezel.
· Be sure that all locking tabs are fully seated into the main body of the case when reinstalling the bezel.
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of the keypad PCB by carefully lifting the locking tab on
J2
to secure the flexible switchpad connection. The tab should
J2
J2
Spectrum Master MM