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General Maintenance
Assembly Procedures
3
3-15
3-27. Install the Memory Card I/F PCA (2635A Only)
1. Place the Memory Card I/F PCA (Q) into position so that the three mounting holes
line up with the chassis supports located at the front-center of the chassis.
2. Install the three 6-32, 1/4-inch panhead Phillips screws in the mounting holes of the
Memory Card I/F PCA.
3. Reconnect the high-density ribbon cable (O) to the connector on the Memory Card
Interface PCA (Q).
3-28. Assemble the Front Panel Assembly
As appropriate, use the following steps to assemble the Front Panel Assembly.
1. Clean the lens (M) with deionized air and, if necessary, isopropyl alcohol. Then
gently snap the lens into the front panel tabs.
2. Fit the elastomeric keypad assembly (L) through the Front Panel Assembly.
3. Slide the Display PCA into the bottom securing tabs on the back of the Front Panel
Assembly. Then gently snap the pca into place.
Note
The Display PCA provides a space for a center screw. If the peripheral
tabs are intact, this screw is not necessary. If some of the tabs are broken,
the screw can be used as an additional securing device.
4. Connect the 20-pin cable (G) to the Display PCA.
3-29. Install the Front Panel Assembly
Use the following procedure when installing the Front Panel Assembly:
1. Position the Front Panel Assembly into place and snap the four tab retainers (I) onto
the chassis.
2. Observing the alignment orientation provided by tabs on the connector, attach the
display ribbon cable connector (G) on the Main PCA.
3. Using needle nose pliers, connect the wires at the rear of the recessed input terminals
(Red to VΩ, Black to COM).
3-30. Install the Handle and Mounting Brackets
Refer to Figure 3-3 during the following procedure. Use a Phillips head screwdriver to
attach the two handle mounting brackets. Note that these brackets must be reinstalled in
their original positions. Therefore, the inside of each bracket is labeled with an R or an
L, in reference to the front view of the instrument.
Now, engage the handle. Point the handle straight up. Then pull out on each end of the
handle to engage the respective pivot in its bracket. Pull out slightly on both pivots to
rotate the handle to the desired position.
3-31. Install the Instrument Case
Reinstall the instrument case, checking that it seats properly in the front panel. Attach
the rear bezel with the two panhead Phillips screws and secure the case with the flathead
Phillips screw in the bottom. Refer to Figure 3-2.