Assembly Removal and Replacement, MS203xC 7-26 Replacing Fan Assembly – ND70948
MS20xxC MM PN: 10580-00307 Rev. D 7-79
5. Using a Phillips-head screwdriver, remove the eight (8) screws holding the VNA PCB Assembly in place.
6. The VNA PCB Assembly is connected to the Mother Board and the SPA PCB with several cables. None of
these cables are disconnected during Fan Assembly replacement. Observe all cables as the VNA PCB
Assembly is moved and then replaced. Take care not to stress any of these cables.
7. 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 cable connection for
the Fan Assembly, connector J1002 on the Mother Board. Refer to item 11 in Figure 7-43. Note that the
VNA PCB Assembly and the SPA PCB Assembly cables are not shown in Figure 7-43.
1. Connector J3000, 40-Pin, for ribbon cable to SPA PCB
2. Connector J5010, Twiddle connection for rotary encoder
3. GPS PCB (Option 31)
4. Connector J4202, for multi-conductor signal cable to LCD display
5. MMCX Connector J3203, 140 MHz IF (connects to SPA PCB at J4004)
6. MMCX Connector J3202, External Trigger (BNC connector on top connector panel)
7. MCX Connector J2201, 26 MHz Out (VNA reference, connects to J7002 on upper shield of VNA Module)
8. MMCX Connector J2200, 100 MHz In (connects to SPA PCB at J6002)
9. MMCX Connector J2202, not used for MS203xC models.
10.Connector J1003, Battery connection
11.Connector J1002, Fan connection
12.Rotary Encoder
Figure 7-43. Main PCB (Mother Board) in Case – Connections
To Next Page
Loading...
Need help?
General
