Replaceable Parts 5
E4416A/E4417A Power Meters Service Guide 105
Removing the A3 Front Panel Assembly
1 1. Disconnect the following cables from the A2 processor assembly:
• Power reference semi- rigid (When replacing use the torques detailed on
page 108).
• Front panel keypad.
• Front panel LCD.
2 Disconnect the flex circuit from the measurement assembly.
The flex circuit assembly is released by pushing the connector tab forward
and lifting. To replace the flex circuit, loop it as shown on page 106, and
connect the flex circuit as shown in the figures on page 101.
3 Remove the center screw from the right hand side of the front panel.
4 Remove the front panel by pressing in the metal tab on the front panel as
shown and push down on the side of the chassis until the standoffs are
cleared from the holes.
Take care when disconnecting the front panel keyboard and LCD. Move the A2 plastic
support bracket to its forward position using the two side levers, unclip the flexi-cable
retaining bar on the front panel keypad and front panel LCD cable connectors and
disconnect the cable.
Take care when disconnecting the flex circuit from the measurement assembly.
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