3 Replacing Assemblies
196 Keysight 53210A/53220A/53230A Assembly Level Service Guide
12 On the middle front right-hand side of the front panel, pull the plastic tab (Y on
Figure 3-8) carefully toward the rear of the chassis and simultaneously press in
on the right side panel of the aluminum chassis until the front panel is partially
released. The right front standoffs should now be free of their holes.
13 Using gentle pressure on both sides of the front panel, push the front panel
away from the motherboard to release the edge connector and free the front
panel completely.
14 To replace the front panel, reverse the above procedure.
At this point, the front panel is only held to the motherboard by an edge
connector.
The Lithium-Ion ’coin’ battery (CR2032) on the rear of the display board may now
be easily accessed and replaced, if necessary. Symptoms of a discharged
CR2032 battery needing replacement are when the Real Time Clock does not
maintain real time correctly after the AC power cable is removed from the
counter. If Option 300 is installed, the Real Time Clock should continue to
update correctly even if the AC power cord is disconnected, regardless of the
charge status of the CR2032.
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