Anritsu MG3702xA Series, Maintenance Manual

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6-6 A2 CPU Assembly and Hard Drive Chapter 6 — Removal and Replacement Procedures
6-10 PN: 10370-10372 Rev. B MG3702xA MM
6-6 A2 CPU Assembly and Hard Drive
This section provides instructions for removing and replacing the A2 CPU Assembly and Hard Drive which are
located under a metal cover directly behind the front panel. See
Figure 6-4 . Instructions to replace the
processor battery are included.
Preliminary
If possible, save the existing calibration data onto a flash drive by doing the following:
1. Insert USB flash drive into unit.
2. Copy the C:\Anritsu\MG37020A\Calibration directory to the USB flash drive.
3. Remove the Options.dat and SerialNumber.dat file from the USB flash drive.
4. Remove the front handles, rear feet, and chassis covers as described in Section 6-4 .
5. Remove the front panel assembly as described in Section 6-5 .
A2 and Hard Drive Replacement Procedure
Remove and replace the A2 CPU PCB as follows:
1. To gain access the A2 CPU, remove the two screws that secure the cover.
2. Rotate the 2 side catches up to raise the A2 assembly slightly.
3. Carefully unplug the upper ribbon cable from the PCB.
4. To disconnect the more delicate lower ribbon cable, use tweezers or another pointed tool to push down on
the small tabs located at each end of the connector.
5. After a few pushes on each tab, the cable will be released.
After both cables are unplugged, remove the A2 assembly from the enclosure.
Note
Because they are configured as a set, the A2 CPU assembly and the hard disk drive (HDD) must
always be replaced together.
Warning
It's very important that the Options.dat and SerialNumber.dat files are NOT copied to the new
A2 / Hard Drive in place of the existing files that come with the new exchange assembly. If this
happens, the new exchange assembly will become inoperable.
Caution The lower ribbon cable is fragile. Use care when unplugging this cable.