7-20 Replacing Rotary Encoder – 3-410-101 Assembly Removal and Replacement, MS203xC
7-50 PN: 10580-00307 Rev. D MS20xxC MM
Removing the VNA PCB Assembly:
Figure 7-23 shows model MS2036C. All steps to remove and replace the VNA PCB Assembly are the same for
MS2036C and MS2038C instruments. In model MS2038C, the microwave module replaces the 2 semi-rigid
cables. Refer also to the microwave module, item 15 in Figure 7-7 on page 7-9.
7. Using a Phillips-head screwdriver, remove the eight (8) screws holding the VNA PCB Assembly in place.
8. Two cables connect between the VNA PCB Assembly and the Mother Board. Refer to Figure 7-21
on page 7-41 for Mother Board connector locations. They will be removed.
a. The External Trigger In cable is attached to the Ext Trig In connector on the top connector panel
and also to connector J3202 on the Mother Board.
b. The 26 MHz VNA reference cable is attached to the top shield of the VNA Module and also to
connector J2201 on the Mother Board.
9. Two cables connect between the VNA PCB Assembly and the SPA PCB. They will remain connected.
a. The External Reference In cable is attached to the Ext Ref In connector on the top connector panel
and also to connector J6000 on the SPA PCB.
b. The 10 MHz Reference Out cable is attached to the Ref Out 10 MHz connector on the top connector
panel and also to connector J6001 on the SPA PCB.
10. Lift the top edge of the VNA Assembly (with the attached top connector panel) and carefully move the
VNA Assembly up and in the direction of the top of the case in order to expose the MCX cable connection
on the Mother Board at J2201 and the MMCX cable connection on the Mother Board at J3202.
Figure 7-23. VNA PCB Assembly Screw Locations – MS2036C Shown
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