Opening The Spectrum Master Case - Anritsu Spectrum Master MS2721A Maintenance Manual

6. Opening the Spectrum Master Case

This procedure provides instructions for opening the Spectrum Master case. With the case opened, the internal assem-
blies can be removed and replaced, as detailed in the following sections.
1. Place the Spectrum Master face down on a stable work surface.
2. Remove the battery door and battery as shown in Section 3.
3. Use a Phillips screwdriver to remove the four screws securing the two halves of the Spectrum Master case together
(Figure 9).
Figure 9. Removing the Cover Screws
4. Carefully lift up on the side of the case shown and begin to separate the two halves.
Do not force or pull the two halves of the case apart completely, as there are delicate cables attached
between the two halves that must be disconnected first. Refer to Figures 10 and 11 and note the posi-
tion and routing of the cables, as they should be similarly routed when the unit is reassembled.
There is an RF gasket material between the two halves of the case. Take care not to remove or dam-
age this material when separating the case.
5. Carefully disconnect the
6. Carefully disconnect the
7. Carefully disconnect the cable that comes from
on the main PCB assembly.
100M SPA
8. Carefully disconnect the cable that comes from
on the main PCB assembly.
37.8M IN
9. Carefully disconnect the ribbon cable that connects the Spectrum Analyzer module to the main PCB assembly at
connector .
J3000
10. The two halves of the instrument can now be safely separated. Refer to the following sections to remove and replace
specific components of the instrument.
11. Reverse the above steps to reassemble the case.
Spectrum Master MM
LIFT THIS
SIDE FIRST
CAUTION
cable from the main PCB assembly connection marked
External Reference In
cable from the main PCB connection marked
External Trigger In
J9007
J3008
REMOVE FOUR
SCREWS
of the Spectrum Analyzer module from the connector marked
of the Spectrum Analyzer module from the connector marked
.
EXT REF
.
J3007
27